10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 FORM 10-Q

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended

JUNE 30, 2011

or

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

 For the transition period from ________ to ________

Commission File Number 000-30205

CABOT MICROELECTRONICS CORPORATION

(Exact name of registrant as specified in its charter)

DELAWARE	36-4324765
(State of Incorporation)	(I.R.S. Employer Identification No.)

870 NORTH COMMONS DRIVE	60504
AURORA, ILLINOIS	(Zip Code)
(Address of principal executive offices)

Registrant's telephone number, including area code: (630) 375-6631

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

YES X NO

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

YES X NO

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.  See definitions of “large accelerated filer,” “accelerated filer” and smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

     Large accelerated filer X      Accelerated filer      Non-accelerated filer      Smaller reporting company

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

YES NO X

As of July 29, 2011, the Company had 23,303,839 shares of Common Stock, par value $0.001 per share, outstanding.

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CABOT MICROELECTRONICS CORPORATION

INDEX

Part I. Financial Information		Page
Item 1.	Financial Statements
	Consolidated Statements of Income Three and Nine Months Ended June 30, 2011 and 2010	3
	Consolidated Balance Sheets June 30, 2011, and September 30, 2010	4
	Consolidated Statements of Cash Flows Nine Months Ended June 30, 2011 and 2010	5
	Notes to the Consolidated Financial Statements	6
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	18
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	25
Item 4.	Controls and Procedures	27
Part II. Other Information
Item 1.	Legal Proceedings	28
Item 1A.	Risk Factors	28
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	33
Item 6.	Exhibits	33
	Signatures	34

2

PART I. FINANCIAL INFORMATION

ITEM 1.

CABOT MICROELECTRONICS CORPORATION

CONSOLIDATED STATEMENTS OF INCOME

(Unaudited and in thousands, except per share amounts)

	Three Months Ended					Nine Months Ended
	June 30,					June 30,
	2011			2010		2011			2010
Revenue	$	111,846		$	101,655	$	335,711		$	297,883
Cost of goods sold		58,821			51,759		172,522			148,114
Gross profit		53,025			49,896		163,189			149,769
Operating expenses:
Research, development and technical		14,573			12,875		43,348			38,364
Selling and marketing		7,785			7,009		22,056			19,861
General and administrative		11,008			14,637		34,251			38,581
Total operating expenses		33,366			34,521		99,655			96,806
Operating income		19,659			15,375		63,534			52,963
Other income (expense), net		(311	)		172		(600	)		(207	)
Income before income taxes		19,348			15,547		62,934			52,756
Provision for income taxes		6,559			5,450		20,561			18,588
Net income	$	12,789		$	10,097	$	42,373		$	34,168
Basic earnings per share	$	0.55		$	0.44	$	1.85		$	1.47
Weighted average basic shares outstanding		23,119			23,143		22,931			23,178
Diluted earnings per share	$	0.54		$	0.43	$	1.80		$	1.46
Weighted average diluted shares outstanding		23,797			23,478		23,525			23,383

The accompanying notes are an integral part of these consolidated financial statements.

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CABOT MICROELECTRONICS CORPORATION

CONSOLIDATED BALANCE SHEETS

(Unaudited and in thousands, except share amounts)

	June 30, 2011			September 30, 2010
ASSETS
Current assets:
Cash and cash equivalents	$	292,939		$	254,164
Accounts receivable, less allowance for doubtful accounts of $1,130 at June 30, 2011, and $1,121 at September 30, 2010		56,989			57,456
Inventories		54,747			51,896
Prepaid expenses and other current assets		24,562			13,973
Deferred income taxes		4,560			3,540
Total current assets		433,797			381,029
Property, plant and equipment, net		125,381			115,811
Goodwill		43,080			40,436
Other intangible assets, net		15,852			17,089
Deferred income taxes		-			8,044
Other long-term assets		10,718			9,347
Total assets	$	628,828		$	571,756
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	18,543		$	17,521
Capital lease obligations		340			1,296
Accrued expenses and other current liabilities		31,053			34,513
Total current liabilities		49,936			53,330
Capital lease obligations, net of current portion		4			12
Deferred income taxes		3,131			-
Other long-term liabilities		5,922			4,071
Total liabilities		58,993			57,413
Commitments and contingencies (Note 8)
Stockholders’ equity:
Common Stock: Authorized: 200,000,000 shares, $0.001 par value; Issued: 27,646,352 shares at June 30, 2011, and 26,384,715 shares at September 30, 2010		28			26
Capital in excess of par value of common stock		274,546			228,103
Retained earnings		426,140			383,767
Accumulated other comprehensive income		26,599			18,538
Treasury stock at cost, 4,348,427 shares at June 30, 2011, and 3,446,069 shares at September 30, 2010		(157,478	)		(116,091	)
Total stockholders’ equity		569,835			514,343
Total liabilities and stockholders’ equity	$	628,828		$	571,756

The accompanying notes are an integral part of these consolidated financial statements.

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CABOT MICROELECTRONICS CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited and amounts in thousands)

	Nine Months Ended June 30,
	2011			2010
Cash flows from operating activities:
Net income	$	42,373		$	34,168
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		17,968			18,839
Provision for doubtful accounts		11			(109	)
Share-based compensation expense		9,921			8,974
Deferred income tax expense (benefit)		8,713			(2,425	)
Non-cash foreign exchange (gain) loss		(459	)		344
Loss on disposal of property, plant and equipment		38			69
Other		(1,075	)		(87	)
Changes in operating assets and liabilities:
Accounts receivable		1,515			(1,782	)
Inventories		(1,899	)		(5,331	)
Prepaid expenses and other assets		(10,264	)		(2,458	)
Accounts payable		(3,898	)		3,936
Accrued expenses, income taxes payable and other liabilities		(3,298	)		13,117
Net cash provided by operating activities		59,646			67,255
Cash flows from investing activities:
Additions to property, plant and equipment		(18,369	)		(8,179	)
Proceeds from sales of property, plant and equipment		1			2
Purchase of patents		-			(115	)
Proceeds from the sale of investments		25			50
Net cash used in investing activities		(18,343	)		(8,242	)
Cash flows from financing activities:
Repurchases of common stock		(41,387	)		(10,764	)
Net proceeds from issuance of stock		37,224			2,639
Tax benefits associated with share-based compensation expense		967			-
Principal payments under capital lease obligations		(964	)		(900	)
Net cash used in financing activities		(4,160	)		(9,025	)
Effect of exchange rate changes on cash		1,632			129
Increase in cash and cash equivalents		38,775			50,117
Cash and cash equivalents at beginning of period		254,164			199,952
Cash and cash equivalents at end of period	$	292,939		$	250,069
Supplemental disclosure of non-cash investing and financing activities:
Purchases of property, plant and equipment in accrued liabilities and accounts payable at the end of the period	$	5,331		$	941
Issuance of restricted stock		6,693			4,985

The accompanying notes are an integral part of these consolidated financial statements.

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CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited and in thousands, except share and per share amounts)

1. BACKGROUND AND BASIS OF PRESENTATION

Cabot Microelectronics Corporation ("Cabot Microelectronics'', "the Company'', "us'', "we'' or "our'') supplies high-performance polishing slurries and pads used in the manufacture of advanced integrated circuit (IC) devices within the semiconductor industry, in a process called chemical mechanical planarization (CMP).  CMP polishes surfaces at an atomic level, thereby enabling IC device manufacturers to produce smaller, faster and more complex IC devices with fewer defects.  We develop, produce and sell CMP slurries for polishing many of the conducting and insulating materials used in IC devices, and also for polishing the disk substrates and magnetic heads used in hard disk drives.  We also develop, manufacture and sell CMP polishing pads, which are used in conjunction with slurries in the CMP process.  We also pursue other demanding surface modification applications through our Engineered Surface Finishes (ESF) business where we believe we can leverage our expertise in CMP consumables for the semiconductor industry to develop products for demanding polishing applications in other industries.  For additional information, refer to Part 1, Item 1, “Business”, in our annual report on Form 10-K for the fiscal year ended September 30, 2010.

The unaudited consolidated financial statements have been prepared by Cabot Microelectronics Corporation pursuant to the rules of the Securities and Exchange Commission (SEC) and accounting principles generally accepted in the United States of America.  In the opinion of management, these unaudited consolidated financial statements include all normal recurring adjustments necessary for the fair presentation of Cabot Microelectronics’ financial position as of June 30, 2011, cash flows for the nine months ended June 30, 2011, and June 30, 2010, and results of operations for the three and nine months ended June 30, 2011, and June 30, 2010.  The results of operations for the three and nine months ended June 30, 2011 may not be indicative of results to be expected for future periods, including the fiscal year ending September 30, 2011.  These unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes thereto included in Cabot Microelectronics’ annual report on Form 10-K for the fiscal year ended September 30, 2010.

The consolidated financial statements include the accounts of Cabot Microelectronics and its subsidiaries.  All intercompany transactions and balances between the companies have been eliminated as of June 30, 2011.

Results of Operations

The results of operations for the nine months ended June 30, 2011 include certain adjustments to correct prior period amounts, which we have determined to be immaterial to the current period and the prior periods to which they relate.  An adjustment in the second quarter of fiscal 2011 reduced net income for the quarter by $671 and diluted earnings per share by approximately $0.03.  This adjustment related to income tax expense of $671 recorded for certain compensation in fiscal 2008 through 2010 for which a previous tax benefit should not have been recorded.  Adjustments in the first quarter of fiscal 2011 related to: (1) $1,474 ($1,014, net of tax) in employer-paid fringe benefits for required contributions to our 401(k) Plan, Supplemental Employee Retirement Plan, and non-United States statutory pension plans as a result of our annual payment pursuant to our fiscal 2010 annual incentive cash bonus program (AIP); (2) the reversal of a $497 deferred tax asset regarding certain share-based compensation expense which is not subject to such tax treatment; and (3) our under accrual of $290 ($199, net of tax) for payments made pursuant to the AIP as a result of the calculation of results against goals under the AIP.  Collectively, these adjustments reduced net income for the first nine months of fiscal 2011 by $2,381 and diluted earnings per share by approximately $0.10.

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CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(Unaudited and in thousands, except share and per share amounts)

2. FAIR VALUE OF FINANCIAL INSTRUMENTS

On October 1, 2009, we adopted the accounting provisions that relate to the fair value of non-financial assets and non-financial liabilities.  We did not elect the fair value option for any non-financial assets or non-financial liabilities that were not previously required to be measured at fair value under other generally accepted accounting principles.  The adoption of these provisions did not have a material impact on our results of operations, financial position or cash flows.

Fair value is defined as the price that would be received from the sale of an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.  The FASB established a three-level hierarchy for disclosure based on the extent and level of judgment used to estimate fair value.  Level 1 inputs consist of valuations based on quoted market prices in active markets for identical assets or liabilities.  Level 2 inputs consist of valuations based on quoted prices for similar assets or liabilities, quoted prices for identical assets or liabilities in an inactive market, or other observable inputs.  Level 3 inputs consist of valuations based on unobservable inputs that are supported by little or no market activity.

The following table presents assets that we measured at fair value on a recurring basis at June 30, 2011 and September 30, 2010.  As permitted under the relevant standards, we have chosen to not measure any of our current liabilities at fair value as we believe our current liabilities approximate their fair value due to their short-term, highly liquid characteristics.  We have classified the following assets in accordance with the fair value hierarchy set forth in the applicable standards.  In instances where the inputs used to measure the fair value of an asset fall into more than one level of the hierarchy, we have classified them based on the lowest level input that is significant to the determination of the fair value.

June 30, 2011	Level 1		Level 2		Level 3		Total Fair Value
Cash and cash equivalents	$	292,939	$	-	$	-	$	292,939
Auction rate securities (ARS)		-		-		8,041		8,041
Other long-term investments		955		-		-		955
Total	$	293,894	$	-	$	8,041	$	301,935

September 30, 2010	Level 1		Level 2		Level 3		Total Fair Value
Cash and cash equivalents	$	254,164	$	-	$	-	$	254,164
Auction rate securities (ARS)		-		-		8,066		8,066
Other long-term investments		-		-		-		-
Total	$	254,164	$	-	$	8,066	$	262,230

Our cash and cash equivalents consist of various bank accounts used to support our operations and investments in institutional money-market funds which are traded in active markets.  The fair value of our long-term ARS is determined through two discounted cash flow analyses, one using a discount rate based on a market index comprised of tax exempt variable rate demand obligations and one using a discount rate based on the LIBOR swap curve, adding a risk factor to reflect current liquidity issues in the ARS market.  Our other long-term investments represent the fair value of investments under the Cabot Microelectronics Supplemental Employee Retirement Plan (SERP), which is a nonqualified supplemental savings plan.  The fair value of the investments is determined through quoted market prices within actively traded markets.  Although the investments are allocated to individual participants and investment decisions are made solely by those participants, the SERP has been deemed a nonqualified plan.  Consequently, the Company owns the assets and the related liability for disbursement until such time a participant makes a qualifying withdrawal, and should have recorded the assets and liability in our Consolidated Balance Sheet in prior periods.  As a result, during the quarter ended March 31, 2011, we established a long-term asset of $952 representing the fair value of SERP investments held at March 31 and a corresponding liability of $952 in other long-term liabilities on our Consolidated Balance Sheet.  The long-term asset and long-term liability were adjusted to $955 in the third quarter of fiscal 2011 to reflect their fair value as of June 30, 2011.

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CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(Unaudited and in thousands, except share and per share amounts)

We applied accounting standards regarding the classification and valuation of financial instruments to the valuation of our investment in ARS at June 30, 2011.  Our ARS investments at June 30, 2011 consisted of two tax exempt municipal debt securities with a total par value of $8,275.  The ARS market began to experience illiquidity in early 2008, and this illiquidity continues.  Despite this lack of liquidity, there have been no defaults of the underlying securities and interest income on these holdings continues to be received on scheduled interest payment dates.  Our ARS, when purchased, were generally issued by A-rated municipalities.  Although the credit ratings of both municipalities have been downgraded since our original investment, the ARS are credit enhanced with bond insurance and currently carry a credit rating of AA+ by Standard and Poors.

Since an active market for ARS does not currently exist, we determine the fair value of these investments using a Level 3 discounted cash flow analysis and also consider other factors such as the reduced liquidity in the ARS market and nature of the insurance backing.  Key inputs to our discounted cash flow model include projected cash flows from interest and principal payments and the weighted probabilities of improved liquidity or debt refinancing by the issuer.  We also incorporate certain Level 2 market indices into the discounted cash flow analysis, including published rates such as the LIBOR rate, the LIBOR swap curve and a municipal swap index published by the Securities Industry and Financial Markets Association.  The following table presents a reconciliation of the activity in fiscal 2011 for fair value measurements using level 3 inputs:

Balance as of September 30, 2010	$	8,066
Net sales of ARS		(25	)
Balance as of June 30, 2011	$	8,041

Based on our fair value assessment, we determined that one ARS continues to be impaired as of June 30, 2011.  This security has a fair value of $3,091 (par value $3,325).  We assessed the impairment in accordance with the applicable standards and determined that the impairment was due to the lack of liquidity in the ARS market rather than to credit risk.  We have maintained the $234 temporary impairment that we previously recorded.  We believe that this ARS is not permanently impaired because in the event of default by the issuer, we expect the insurance provider would pay interest and principal following the original repayment schedule, we successfully monetized at par value $25 of this security during our fiscal quarter ended March 31, 2011 and we do not intend to sell the security nor do we believe we will be required to sell the security before the value recovers, which may be at maturity.  We determined that the fair value of the other ARS was not impaired as of June 30, 2011.  See Note 5 for more information on these investments.

3. INVENTORIES

Inventories consisted of the following:

	June 30,		September 30,
	2011		2010
Raw materials	$	25,750	$	23,542
Work in process		5,422		3,189
Finished goods		23,575		25,165
Total	$	54,747	$	51,896

The increase in inventory from September 30, 2010 was primarily due to the increased level of demand for our products during the first nine months of fiscal 2011.

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CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(Unaudited and in thousands, except share and per share amounts)

4. GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill was $43,080 as of June 30, 2011, and $40,436 as of September 30, 2010.  The increase in goodwill was due to foreign exchange fluctuations of the New Taiwan Dollar.

Goodwill and indefinite lived intangible assets are tested for impairment annually in the fourth quarter of the fiscal year or more frequently if indicators of potential impairment exist, using a fair-value-based approach.  The recoverability of goodwill is measured at the reporting unit level, which is defined as either an operating segment or one level below an operating segment.  We have consistently determined the fair value of our reporting units using a discounted cash flow analysis of our projected future results.  The recoverability of indefinite lived intangible assets is measured using the royalty savings method.  The use of discounted projected future results is based on assumptions that are consistent with our estimates of future growth within the strategic plan used to manage the underlying business.  Factors requiring significant judgment include assumptions related to future growth rates, discount factors, royalty rates and tax rates, among others.  Changes in economic and operating conditions that occur after the annual impairment analysis or an interim impairment analysis that impact these assumptions may result in future impairment charges.  We completed our annual impairment test during our fourth quarter of fiscal 2010 and concluded that no impairment existed.  There were no indicators of potential impairment during the quarter ended June 30, 2011, so we did not perform an impairment review for goodwill and indefinite lived intangible assets during the quarter.  There have been no cumulative impairment charges recorded on the goodwill of any of our reporting units.

The components of other intangible assets are as follows:

	June 30, 2011				September 30, 2010
	Gross Carrying		Accumulated		Gross Carrying		Accumulated
	Amount		Amortization		Amount		Amortization
Other intangible assets subject to amortization:
Product technology	$	8,430	$	3,707	$	8,206	$	2,926
Acquired patents and licenses		8,115		6,368		8,115		6,135
Trade secrets and know-how		2,550		2,550		2,550		2,550
Distribution rights, customer lists and other		12,738		4,546		11,939		3,300
Total other intangible assets subject to amortization		31,833		17,171		30,810		14,911
Total other intangible assets not subject to amortization*		1,190				1,190
Total other intangible assets	$	33,023	$	17,171	$	32,000	$	14,911

*       Total other intangible assets not subject to amortization consist primarily of trade names.

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CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(Unaudited and in thousands, except share and per share amounts)

Amortization expense on our other intangible assets was $688 and $2,032 for the three and nine months ended June 30, 2011, respectively.  Amortization expense on our other intangible assets was $602 and $1,795 for the three and nine months ended June 30, 2010, respectively.  Estimated future amortization expense for the five succeeding fiscal years is as follows:

Fiscal Year	Estimated Amortization Expense
Remainder of 2011	$     688
2012	2,718
2013	2,551
2014	2,506
2015	2,465

5. OTHER LONG-TERM ASSETS

Other long-term assets consisted of the following:

	June 30,		September 30,
	2011		2010
Long-term ARS	$	8,041	$	8,066
Other long-term assets		1,722		1,281
Other long-term investments		955		-
Total	$	10,718	$	9,347

As discussed in Note 2 of this Form 10-Q, our two ARS that we owned as of June 30, 2011 are classified as long-term investments.  The securities are credit enhanced with bond insurance to a AA+ credit rating and all interest payments continue to be received on a timely basis.  Although we believe these securities will ultimately be collected in full, we believe that it is not likely that we will be able to monetize the securities in our next business cycle (which for us is generally one year).  We maintain a $234 pretax reduction ($151 net of tax) in fair value on one of the ARS that we had first recognized in fiscal 2008.  We assessed the impairment and determined that the impairment was temporary as it was related to the illiquid ARS market rather than credit risk.  In addition, we continue to believe this decline in fair value is temporary based on the nature of the underlying debt, the presence of bond insurance, our expectation that the issuer may refinance its debt, the fact that all interest payments have been received, our successful monetization of $25 of this ARS during the quarter ended March 31, 2011 and our intention not to sell the security nor be required to sell the security until the value recovers, which may be at maturity, given our current cash position, our expected future cash flow, and our unused debt capacity.

As discussed in Note 2 of this Form 10-Q, we recorded a long-term asset and a corresponding long-term liability of $955 representing the fair value of our SERP investments as of June 30, 2011.

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CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(Unaudited and in thousands, except share and per share amounts)

6. ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

Accrued expenses and other current liabilities consisted of the following:

	June 30,		September 30,
	2011		2010
Accrued compensation	$	19,920	$	25,752
Goods and services received, not yet invoiced		4,954		4,359
Warranty accrual		357		375
Taxes, other than income taxes		1,004		1,162
Other		4,818		2,865
Total	$	31,053	$	34,513

The decrease in accrued compensation was primarily due to the payment of our AIP earned in fiscal 2010, partially offset by nine months of accrual under our AIP related to fiscal 2011.  The increase in other current liabilities was primarily due to the timing of customer advances and revenue not yet earned in our Engineered Surface Finishes business.

7. DERIVATIVE FINANCIAL INSTRUMENTS

Periodically we enter into forward foreign exchange contracts in an effort to mitigate the risks associated with currency fluctuations on certain foreign currency balance sheet exposures.  Our foreign exchange contracts do not qualify for hedge accounting; therefore, the gains and losses resulting from the impact of currency exchange rate movements on our forward foreign exchange contracts are recognized as other income or expense in the accompanying consolidated income statements in the period in which the exchange rates change.  We do not use derivative financial instruments for trading or speculative purposes.  In addition, all derivatives, whether designated in hedging relationships or not, are required to be recorded on the balance sheet at fair value.  At June 30, 2011, we had one forward foreign exchange contract to sell Japanese yen related to intercompany notes with one of our subsidiaries in Japan and for the purpose of hedging the risk associated with a net transactional exposure in Japanese yen.

The fair value of our derivative instrument included in the Consolidated Balance Sheet was as follows:

		Asset Derivatives				Liability Derivatives
	Balance Sheet Location	Fair Value at June 30, 2011		Fair Value at September 30, 2010		Fair Value at June 30, 2011		Fair Value at September 30, 2010
Derivatives not designated as hedging instruments
Foreign exchange contracts	Prepaid expenses and other current assets	$	6	$	5	$	-	$	-
	Accrued expenses and other current liabilities	$	-	$	-	$	-	$	-

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CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(Unaudited and in thousands, except share and per share amounts)

The following table summarizes the effect of our derivative instrument on our Consolidated Statement of Income for the three and nine months ended June 30:

		Gain (Loss) Recognized in Statement of Income
		Three Months Ended						Nine Months Ended
	Statement of Income Location	June 30, 2011			June 30, 2010			June 30, 2011			June 30, 2010
Derivatives not designated as hedging instruments
Foreign exchange contracts	Other income (expense), net	$	(186	)	$	(511	)	$	(248	)	$	(41	)

8. CONTINGENCIES

LEGAL PROCEEDINGS

While we are not involved in any legal proceedings that we believe will have a material impact on our consolidated financial position, results of operations or cash flows, we periodically become a party to legal proceedings in the ordinary course of business.  For example, in January 2007, we filed a legal action against DuPont Air Products NanoMaterials LLC (DA Nano), a CMP slurry competitor, in the United States District Court for the District of Arizona, charging that DA Nano’s manufacturing and marketing of CMP slurries infringe certain CMP slurry patents that we own.  The affected DA Nano products include certain products used for tungsten CMP.  We filed our infringement complaint as a counterclaim in response to an action filed by DA Nano in the same court in December 2006 that sought declaratory relief and alleged non-infringement, invalidity and unenforceability regarding some of the patents at issue in our complaint against DA Nano.  DA Nano filed its complaint following our refusal of its request that we license to it our patents raised in its complaint.  DA Nano’s complaint did not allege any infringement by our products of intellectual property owned by DA Nano.  From June 14 through July 8, 2010, a jury trial for the case was held.  All of Cabot Microelectronics’ patents at issue in the case were found valid.  However, the jury found that DA Nano’s products at issue do not infringe the asserted claims of these patents.  In November 2010, we filed a Notice of Appeal regarding infringement, which is still pending, and DA Nano filed a cross-appeal regarding validity.  However, DA Nano has since voluntarily dropped its cross-appeal, and our patents remain adjudicated as valid.  While the outcome of this and any legal matter cannot be predicted with certainty, we continue to believe that our claims in the pending action are meritorious, and we intend to continue to pursue them.

Refer to Note 17 of “Notes to the Consolidated Financial Statements” in Item 8 of Part II of our annual report on Form 10-K for the fiscal year ended September 30, 2010, for additional information regarding commitments and contingencies.

PRODUCT WARRANTIES

We maintain a warranty reserve that reflects management’s best estimate of the cost to replace product that does not meet customers’ specifications and performance requirements, and costs related to such replacement.  The warranty reserve is based upon a historical product replacement rate, adjusted for any specific known conditions or circumstances.  Additions and deductions to the warranty reserve are recorded in cost of goods sold.  Our warranty reserve requirements changed during the first nine months of fiscal 2011 as follows:

Balance as of September 30, 2010	$	375
Reserve for product warranty during the reporting period		814
Settlement of warranty		(832	)
Balance as of June 30, 2011	$	357

12

CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(Unaudited and in thousands, except share and per share amounts)

9. SHARE-BASED COMPENSATION PLANS

We currently issue share-based payments under the following programs: our Second Amended and Restated Cabot Microelectronics Corporation 2000 Equity Incentive Plan, as amended and restated September 23, 2008 (“2000 Equity Incentive Plan”); our Cabot Microelectronics Corporation 2007 Employee Stock Purchase Plan, as Amended and Restated January 1, 2010 (ESPP), and, pursuant to our 2000 Equity Incentive Plan, our Directors’ Deferred Compensation Plan, as amended September 23, 2008, and our 2001 Executive Officer Deposit Share Program.  For additional information regarding these programs, refer to Note 12 of “Notes to the Consolidated Financial Statements” included in Item 8 of Part II of our annual report on Form 10-K for the fiscal year ended September 30, 2010.

We record share-based compensation expense for all share-based awards, including stock option grants, restricted stock and restricted stock unit awards and employee stock purchases.  We calculate share-based compensation expense using the straight-line approach based on awards ultimately expected to vest, which requires the use of an estimated forfeiture rate.  Our estimated forfeiture rate is primarily based on historical experience, but may be revised in future periods if actual forfeitures differ from the estimate.  We use the Black-Scholes model to estimate the grant date fair value of our stock options and employee stock purchases.  This model requires the input of highly subjective assumptions, including the price volatility of the underlying stock, the expected term of our stock options and the risk-free interest rate.  We estimate the expected volatility of our stock options based on a combination of our stock’s historical volatility and the implied volatilities from actively-traded options on our stock.  We calculate the expected term of our stock options using the simplified method, due to our limited amount of historical option exercise data, and we add a slight premium to this expected term for employees who meet the definition of retirement eligible pursuant to their grants during the contractual term of the grant.  The simplified method uses an average of the vesting term and the contractual term of the option to calculate the expected term.  The risk-free rate is derived from the U.S. Treasury yield curve in effect at the time of grant.

Share-based compensation expense for the three and nine months ended June 30, 2011, and 2010, was as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Cost of goods sold	$	307	$	243	$	920	$	726
Research, development and technical		250		212		804		674
Selling and marketing		274		244		854		780
General and administrative		1,892		1,880		7,343		6,794
Total share-based compensation expense		2,723		2,579		9,921		8,974
Tax benefit		969		918		3,521		3,195
Total share-based compensation expense, net of tax	$	1,754	$	1,661	$	6,400	$	5,779

13

CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(Unaudited and in thousands, except share and per share amounts)

Our non-employee directors received their annual equity award in March 2011.  The award agreements provide for immediate vesting of the award at the time of termination of service for any reason other than by reason of Cause, Death, Disability or a Change in Control, as defined in the Cabot Microelectronics Corporation 2000 Equity Incentive Plan, if at such time the non-employee director has completed an equivalent of at least two full terms as a director of the Company, as defined in the Company’s bylaws.  Five of the Company’s non-employee directors had completed at least two full terms of service as of the date of the March 2011 award.  Consequently, the requisite service period for the award has already been satisfied and we recorded the fair value of $1,010 of the awards to these five directors to share-based compensation expense in the fiscal quarter ended March 31, 2011 rather than recording that expense over the one-year vesting period stated in the award agreement.

For additional information regarding the estimation of fair value, refer to Note 12 of “Notes to the Consolidated Financial Statements” included in Item 8 of Part II of our annual report on Form 10-K for the fiscal year ended September 30, 2010.

10. OTHER INCOME (EXPENSE), NET

Other income (expense) net, consisted of the following:

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
Interest income	$	53		$	68		$	194		$	150
Interest expense		(30	)		(53	)		(111	)		(184	)
Other income (expense)		(334	)		157			(683	)		(173	)
Total other income (expense), net	$	(311	)	$	172		$	(600	)	$	(207	)

The decrease in other income (expense) during the three and nine months ended June 30, 2011 from the comparable periods in fiscal 2010 was primarily due to foreign exchange effects on revenues and expenses, primarily related to changes in the exchange rate of the Japanese yen and the New Taiwan dollar to the U.S. dollar, net of the gains and losses incurred on forward foreign exchange contracts discussed in Note 7 of this Form 10-Q.

11. COMPREHENSIVE INCOME

The components of comprehensive income were as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Net income	$	12,789	$	10,097	$	42,373	$	34,168
Other comprehensive income:
Foreign currency translation adjustment		2,529		1,497		8,046		268
Minimum pension liability adjustment		5		6		15		19
Total comprehensive income	$	15,323	$	11,600	$	50,434	$	34,455

The foreign currency translation adjustments during the three and nine months ended June 30, 2011 and 2010 primarily resulted from the changes in the exchange rates of the U.S. dollar relative to the Japanese yen and the New Taiwan dollar.

14

CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(Unaudited and in thousands, except share and per share amounts)

12. INCOME TAXES

Our effective income tax rate was 33.9% and 32.7% for the three and nine months ended June 30, 2011, respectively, compared to 35.1% and 35.2% for the three and nine months ended June 30, 2010.  The decrease in the effective tax rate during fiscal 2011 reflects the election that we made in the fourth quarter of fiscal 2010 to permanently reinvest the earnings of certain of our foreign subsidiaries outside of the U.S. rather than repatriate those earnings to the U.S., and the reinstatement of the U.S. research and experimentation tax credit in December 2010, which was retroactively effective as of January 1, 2010.  These decreases were partially offset by increased tax expense related to share-based compensation.  In addition, the effective tax rate for the nine months ended June 30, 2011 increased due to $671 in income tax expense related to certain compensation in fiscal 2008 through 2010 for which a previous tax benefit should not have been recorded, and the reversal of a $497 deferred tax asset related to certain share-based compensation expense, as discussed in Note 1 under the heading “Results of Operations”.

13. EARNINGS PER SHARE

The standards of accounting for earnings per share require companies to provide a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations.  Basic and diluted earnings per share were calculated as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Numerator:
Earnings available to common shares	$	12,789	$	10,097	$	42,373	$	34,168
Denominator:
Weighted average common shares		23,118,698		23,142,793		22,931,178		23,178,257
(Denominator for basic calculation)
Weighted average effect of dilutive securities:
Share-based compensation		678,382		335,269		594,255		204,579
Diluted weighted average common shares		23,797,080		23,478,062		23,525,433		23,382,836
(Denominator for diluted calculation)
Earnings per share:
Basic	$	0.55	$	0.44	$	1.85	$	1.47
Diluted	$	0.54	$	0.43	$	1.80	$	1.46

For the three months ended June 30, 2011 and 2010, approximately 1.3 million and 2.6 million shares, respectively, attributable to outstanding stock options were excluded from the calculation of diluted earnings per share because the exercise price of the options was greater than the average market price of our common stock and, therefore, their inclusion would have been anti-dilutive.

For the nine months ended June 30, 2011 and 2010, approximately 1.3 million and 2.6 million shares, respectively, attributable to outstanding stock options were excluded from the calculation of diluted earnings per share because the exercise price of the options was greater than the average market price of our common stock and, therefore, their inclusion would have been anti-dilutive.

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CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(Unaudited and in thousands, except share and per share amounts)

14. FINANCIAL INFORMATION BY INDUSTRY SEGMENT AND PRODUCT LINE

We operate predominantly in one industry segment – the development, manufacture, and sale of CMP consumables.

Revenue generated by product line for the three and nine months ended June 30, 2011, and 2010, was as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
Revenue:	2011		2010		2011		2010
Tungsten slurries	$	40,889	$	35,983	$	123,094	$	107,432
Dielectric slurries		30,998		30,529		91,926		85,787
Copper slurries		20,103		19,404		60,119		54,866
Polishing pads		7,561		7,818		23,650		21,673
Data storage slurries		6,863		4,796		20,948		15,906
Engineered Surface Finishes		5,432		3,125		15,974		12,219
Total revenue	$	111,846	$	101,655	$	335,711	$	297,883

15. NEW ACCOUNTING PRONOUNCEMENTS

In October 2010, we adopted new accounting standards regarding the recognition of a controlling financial interest in a variable interest entity (VIE).  The primary beneficiary of a VIE is defined as the enterprise that has both: 1) the power to direct the activities of a VIE that most significantly impact the entity’s economic performance; and 2) the obligation to absorb losses of the entity that could potentially be significant to the VIE or the right to receive benefits from the entity that could potentially be significant to the VIE.  The new standards also require ongoing reassessments of whether an enterprise is the primary beneficiary of a VIE.  The adoption of these new standards did not have any impact on our results of operations, financial position or cash flows as we do not currently have any interest or arrangements that are considered variable interest entities.

In October 2010, we adopted new accounting standards regarding the recognition of revenue for multiple deliverable revenue arrangements.  The new standards modify the fair value requirements regarding the recognition of revenue under multiple deliverable arrangements by allowing the use of the best estimate of selling price in addition to vendor-specific objective evidence (VSOE) and third-party evidence (TPE) for determining the selling price of a deliverable.  A vendor is now required to use its best estimate of the selling price when VSOE or TPE of the selling price cannot be determined.  In addition, the residual method of allocating arrangement consideration is no longer permitted.  The adoption of these new standards did not have a material effect on our results of operations, financial position or cash flows.

16

CABOT MICROELECTRONICS CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(Unaudited and in thousands, except share and per share amounts)

In October 2010, we adopted new accounting standards regarding revenue arrangements that include software elements.  The guidance in these new standards modifies the existing accounting rules regarding the recognition of revenue from the sale of software to exclude: (a) non-software components of tangible products; and (b) software components of tangible products that are sold, licensed or leased with tangible products when the software components and non-software components of the tangible product function together to deliver the tangible product’s essential functionality.  The adoption of these new standards did not have a material effect on our results of operations, financial position or cash flows.

In January 2010, the FASB issued ASU No. 2010-06, “Fair Value Measurements and Disclosures (Topic 820) – Improving Disclosures about Fair Value Measurements” (ASU 2010-06).  ASU 2010-06 provides amendments to the rules regarding the disclosure of fair value measurements and clarifies the language in certain existing disclosures.  New disclosures include a discussion of the transfers in and out of Level 1 and 2 measurements as well as a reconciliation of gross activity for Level 3 measurements.  ASU 2010-06 clarifies the disclosures an entity must make regarding inputs and valuation techniques used in fair value measurements.  The ASU also clarifies that an entity should provide fair value disclosures for each class of assets and liabilities.  ASU 2010-06 is effective for interim and annual reporting periods beginning after December 15, 2009, except for the disclosures about the reconciliation of Level 3 measurements which are effective for fiscal years beginning after December 15, 2010.  The adoption of the provisions relating to Level 1 and Level 2 measurements did not have a material impact on our results of operations, financial position or cash flows.  Based on our current Level 3 fair value measurements, we believe the adoption of the provisions related to Level 3 measurements will not have a material impact on the disclosures in our financial statements.

In May 2011, the FASB issued ASU No. 2011-04, “Fair Value Measurement (Topic 820) – Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs” (ASU 2011-04).  The amendments in ASU 2011-04 change some of the wording used to describe certain U.S. GAAP requirements for measuring fair value and disclosing information about fair value measurements.  Some of the amendments clarify the FASB’s intent about the application of existing fair value measurement requirements and other amendments change a particular principle or requirement for measuring fair value or for disclosing information about fair value measurements.  ASU 2011-04 is effective for interim and annual periods beginning after December 15, 2011.  We believe that the adoption of ASU 2011-04 will not have a material impact on the fair value measurements and their related disclosures in our financial statements.

In June 2011, the FASB issued ASU No. 2011-05, “Comprehensive Income (Topic 220) – Presentation of Comprehensive Income” (ASU 2011-05).  The provisions of ASU 2011-05 require an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements.  If two separate statements are presented, the statement of other comprehensive income should immediately follow the statement of net income.  ASU 2011-05 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011.  Early adoption of these provisions is permitted and will be applied retrospectively.  The adoption of ASU 2011-05 will change the way we present comprehensive income as current U.S. GAAP permits an annual presentation of comprehensive income within the statement of equity and quarterly presentation of comprehensive income within the footnotes to the financial statements.  We expect to present comprehensive income in a separate statement immediately following the statement of net income beginning in our fiscal quarter ending March 31, 2012.

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ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following "Management's Discussion and Analysis of Financial Condition and Results of Operations", as well as disclosures included elsewhere in this Form 10-Q, include "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995.  This Act provides a safe harbor for forward-looking statements to encourage companies to provide prospective information about themselves so long as they identify these statements as forward-looking and provide meaningful cautionary statements identifying important factors that could cause actual results to differ from the projected results.  All statements other than statements of historical fact we make in this Form 10-Q are forward-looking.  In particular, the statements herein regarding future sales and operating results; Company and industry growth, contraction or trends; growth or contraction of the markets in which the Company participates; international events or various economic factors; product performance; the generation, protection and acquisition of intellectual property, and litigation related to such intellectual property; new product introductions; development of new products, technologies and markets; natural disasters; the acquisition of or investment in other entities; uses and investment of the Company’s cash balance; the construction of facilities by the Company; and statements preceded by, followed by or that include the words "intends," "estimates," "plans," "believes," "expects," "anticipates," "should," "could" or similar expressions, are forward-looking statements.  Forward-looking statements reflect our current expectations and are inherently uncertain.  Our actual results may differ significantly from our expectations.  We assume no obligation to update this forward-looking information.  The section entitled "Risk Factors" describes some, but not all, of the factors that could cause these differences.

This section, "Management's Discussion and Analysis of Financial Condition and Results of Operations”, should be read in conjunction with Cabot Microelectronics’ annual report on Form 10-K for the fiscal year ended September 30, 2010, including the consolidated financial statements and related notes thereto.

THIRD QUARTER OF FISCAL 2011 OVERVIEW

The economic and industry growth that we saw during fiscal 2010 in the overall semiconductor industry and for our Company continued through the third quarter of fiscal 2011.  Some industry analysts and customers indicate there appears to be some near-term softening of demand within the semiconductor industry based on certain factors including a potential modest correction of integrated circuit (IC) inventory and ongoing global economic uncertainty.  This softening of demand has led some analysts to reduce their annual estimated semiconductor industry growth forecasts.  Semiconductor unit growth continues to be driven by demand for consumer products such as smart phones and tablets.  Consistent with our initial assessment in our second quarter of fiscal 2011, the natural disasters that occurred in Japan in March have not had a significant impact on the semiconductor industry, or on our business or supply chain.  There are many factors, however, that make it difficult for us to predict future revenue trends for our business, including those discussed in Part II, Item 1A entitled “Risk Factors” in this Form 10-Q.

Revenue for our third quarter of fiscal 2011 was $111.8 million, which represented an increase of 10.0% and 2.0% from the third quarter of fiscal 2010 and from the previous fiscal quarter, respectively.  We believe the increase in revenue from the third quarter of fiscal 2010 reflects continued solid demand for our products.  Compared to the third quarter of fiscal 2010, our revenues increased within each of our business areas except for our polishing pads business.  Compared to the previous fiscal quarter, revenue increased in our tungsten, copper and dielectric slurry business areas.  These revenue increases were partially offset by revenue decreases in our data storage, polishing pads and Engineered Surface Finishes business areas.

18

Gross profit expressed as a percentage of revenue for our third quarter of fiscal 2011 was 47.4%, and was 48.6% on a year-to-date basis.  Our gross profit percentage this quarter decreased from 49.1% reported in the third quarter of fiscal 2010 and 48.1% in our prior fiscal quarter.  The decrease in gross profit percentage from the third quarter of fiscal 2010 was primarily due to the negative effects of foreign exchange rate changes, particularly the weakening of the U.S. dollar against the Japanese yen, and selective price decreases, partially offset by a higher-valued product mix.  The decrease in gross profit percentage from the prior fiscal quarter was primarily due to lower yields in our manufacturing operations and increased fixed manufacturing costs, partially offset by a reduction in certain variable manufacturing costs.  We continue to expect our gross profit percentage for full fiscal year 2011 to be in the range of 48% to 50%.  However, we may continue to experience fluctuations in our gross profit due to a number of factors, including the extent to which we utilize our manufacturing capacity and fluctuations in our product mix, which may cause our quarterly gross profit to be above or below this annual guidance range.

Operating expenses were $33.4 million in our third quarter of fiscal 2011, compared to $34.5 million in the third quarter of fiscal 2010 and $33.3 million in the previous fiscal quarter.  The decrease in operating expenses from the comparable quarter of fiscal 2010 was primarily due to decreased professional fees, including costs to enforce our intellectual property partially offset by increased staffing-related costs and higher expenses for clean room materials.  We continue to expect full year fiscal 2011 operating expenses to be in the range of $130 million to $135 million.

Diluted earnings per share for our third fiscal quarter was $0.54, an increase from diluted earnings per share of $0.43 reported in the third quarter of fiscal 2010 and a decrease from $0.55 reported in the previous fiscal quarter.  The increase in diluted earnings per share from the third quarter of fiscal 2010 was primarily due to higher revenue and lower operating expenses, partially offset by the effects of a lower gross profit margin.  The decrease in diluted earnings per share from the prior fiscal quarter primarily reflects a lower gross profit margin and increased losses incurred on forward foreign exchange contracts reflected in other income and expense, as discussed in Note 7 of the Notes to the Consolidated Financial Statements.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES AND EFFECTS OF RECENT ACCOUNTING PRONOUNCEMENTS

We discuss our critical accounting estimates and effects of recent accounting pronouncements in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in Item 7 of Part II of our annual report on Form 10-K for the fiscal year ended September 30, 2010.  We believe there have been no material changes in our critical accounting estimates during the first nine months of fiscal 2011.  See Note 15 of the Notes to the Consolidated Financial Statements for a discussion of new accounting pronouncements.

RESULTS OF OPERATIONS

THREE MONTHS ENDED JUNE 30, 2011, VERSUS THREE MONTHS ENDED JUNE 30, 2010

REVENUE

Revenue was $111.8 million for the three months ended June 30, 2011, which represented a 10.0%, or $10.2 million, increase from the three months ended June 30, 2010.  The increase in revenue was driven by an $8.4 million increase in sales volume, a $2.8 million increase due to a higher-priced product mix and a $1.6 million revenue increase due to the effect of foreign exchange rate changes, primarily related to the Japanese yen.  These increases were partially offset by a $2.5 million decrease in revenue due to a lower weighted-average selling price of our CMP slurries.

19

COST OF GOODS SOLD

Total cost of goods sold was $58.8 million for the three months ended June 30, 2011, which represented an increase of 13.6%, or $7.1 million, from the three months ended June 30, 2010.  The increase in cost of goods sold was primarily due to $4.3 million from increased sales volume due to the increased demand for our products, a $2.9 million increase due to the effect of foreign exchange rate changes, primarily related to the Japanese yen, a $1.2 million increase due to higher fixed manufacturing costs, a $1.0 million increase due to certain production variances and a $0.9 million increase due to higher freight and packaging costs.  These increases were partially offset by a $3.4 million decrease in cost of goods sold due to a lower-cost product mix.

Metal oxides, such as silica and alumina, are significant raw materials that we use in many of our CMP slurries.  In an effort to mitigate our risk to rising raw material costs and to increase supply assurance and quality performance requirements, we have entered into multi-year supply agreements with a number of suppliers.  For more information about our supply contracts, see “Tabular Disclosure of Contractual Obligations” in this Quarterly Report on Form 10-Q as well as in Item 7 of Part II of our Annual Report on Form 10-K for the fiscal year ended September 30, 2010.

Our need for additional quantities or different kinds of key raw materials in the future has required, and will continue to require, that we enter into new supply arrangements with third parties.  Future arrangements may result in costs which are different from those in the existing agreements.  In addition, a number of factors could impact the future cost of raw materials, packaging, freight and labor.  We also expect to continue to invest in our operations excellence initiative to improve product quality, reduce variability and improve product yields in our manufacturing process.

GROSS PROFIT

Our gross profit as a percentage of revenue was 47.4% for the three months ended June 30, 2011, as compared to 49.1% for the three months ended June 30, 2010.  The decrease in gross profit as a percentage of revenue was primarily due to the negative effects of foreign exchange rate changes and selective price decreases, partially offset by a higher-valued product mix.

RESEARCH, DEVELOPMENT AND TECHNICAL

Total research, development and technical expenses were $14.6 million for the three months ended June 30, 2011, which represented an increase of 13.2%, or $1.7 million, from the three months ended June 30, 2010.  The increase was primarily due to $0.9 million in higher expenses for clean room materials and $0.7 million in higher staffing-related costs.

Our research, development and technical efforts are focused on the following main areas:

·   Research related to fundamental CMP technology;

·   Development and formulation of new and enhanced CMP consumable products, including collaborating on joint development projects with our customers;

·   Process development to support rapid and effective commercialization of new products;

·   Technical support of CMP products in our customers’ manufacturing facilities; and

·   Evaluation and development of new polishing and metrology applications outside of the semiconductor industry.

SELLING AND MARKETING

Selling and marketing expenses were $7.8 million for the three months ended June 30, 2011, which represented an increase of 11.1%, or $0.8 million, from the three months ended June 30, 2010.  The increase was primarily due to $0.3 million in higher travel-related expenses, $0.2 million in higher staffing-related costs and $0.1 million in higher professional fees.

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GENERAL AND ADMINISTRATIVE

General and administrative expenses were $11.0 million for the three months ended June 30, 2011, which represented a decrease of 24.8%, or $3.6 million, from the three months ended June 30, 2010.  The decrease was primarily due to $3.5 million in lower professional fees, including costs to enforce our intellectual property.

OTHER INCOME (EXPENSE), NET

Other expense was $0.3 million for the three months ended June 30, 2011 compared to other income of $0.2 million during the three months ended June 30, 2010.  The increase in other expense was primarily due to foreign exchange effects on revenues and expenses, primarily related to changes in the exchange rate of the Japanese yen and the New Taiwan dollar to the U.S. dollar, net of the gains and losses incurred on forward foreign exchange contracts discussed in Note 7 of the Notes to the Consolidated Financial Statements.

PROVISION FOR INCOME TAXES

Our effective income tax rate was 33.9% for the three months ended June 30, 2011 compared to a 35.1% effective income tax rate for the three months ended June 30, 2010.  The decrease in the effective tax rate during the third quarter of fiscal 2011 reflects the election that we made in the fourth quarter of fiscal 2010 to permanently reinvest the earnings of certain of our foreign subsidiaries outside of the U.S. rather than repatriate those earnings to the U.S., and the reinstatement of the U.S. research and experimentation tax credit in December 2010, which was retroactively effective as of January 1, 2010.

NET INCOME

Net income was $12.8 million for the three months ended June 30, 2011, which represented an increase of 26.7%, or $2.7 million, from the three months ended June 30, 2010.  The increase was primarily due to the increased sales volume and lower operating expenses, partially offset by a lower gross margin percentage.

NINE MONTHS ENDED JUNE 30, 2011, VERSUS NINE MONTHS ENDED JUNE 30, 2010

The results of operations for the nine months ended June 30, 2011 include certain adjustments to correct prior period amounts, which we have determined to be immaterial to the current period and the prior periods to which they relate.  An adjustment in the second quarter of fiscal 2011 reduced net income by $0.7 million and diluted earnings per share by approximately $0.03.  This adjustment related to income tax expense of $0.7 million recorded for certain compensation in fiscal 2008 through 2010 for which a previous tax benefit should not have been recorded.  Adjustments in the first quarter of fiscal 2011 related to: (1) $1.5 million ($1.0 million, net of tax) in employer-paid fringe benefits for required contributions to our 401(k) Plan, Supplemental Employee Retirement Plan, and non-United States statutory pension plans as a result of our annual payment pursuant to our fiscal 2010 annual incentive cash bonus program (AIP); (2) the reversal of a $0.5 million deferred tax asset regarding certain share-based compensation expense which is not subject to such tax treatment; and (3) our under accrual of $0.3 million ($0.2 million, net of tax) for payments made pursuant to the AIP as a result of the calculation of results against goals under the AIP.  Collectively, these adjustments reduced net income for the first nine months of fiscal 2011 by $2.4 million and diluted earnings per share by approximately $0.10.

21

REVENUE

Revenue was $335.7 million for the nine months ended June 30, 2011, which represented an increase of 12.7%, or $37.8 million, from the nine months ended June 30, 2010.  The increase in revenue was driven by a $40.3 million increase in sales volume and a $4.1 million revenue increase due to the effect of foreign exchange rate changes, primarily related to the Japanese yen, partially offset by a $6.6 million decrease in revenue due to a lower weighted-average selling price of our CMP slurries.  We experienced demand increases across all product lines compared to the same period last year.

COST OF GOODS SOLD

Total cost of goods sold was $172.5 million for the nine months ended June 30, 2011, which represented an increase of 16.5%, or $24.4 million, from the nine months ended June 30, 2010.  The increase in cost of goods sold was primarily due to $20.0 million from increased sales volume due to the increased demand for our products, a $7.0 million increase due to the effect of foreign exchange rate changes, primarily related to the Japanese yen, a $4.1 million increase due to higher fixed manufacturing costs, a $3.7 million increase due to certain production variances, and a $1.6 million increase due to higher freight and packaging costs.  These increases in costs of goods sold were partially offset by a $10.6 million decrease due to a lower-cost product mix and a $2.0 million decrease due to increased utilization of our manufacturing capacity.

GROSS PROFIT

Our gross profit as a percentage of revenue was 48.6% for the nine months ended June 30, 2011, as compared to 50.3% for the nine months ended June 30, 2010.  The decrease in gross profit as a percentage of revenue was primarily due to the absence of a $1.6 million raw material supplier credit we recognized in the first quarter of fiscal 2010 related to our achieving a certain volume threshold in calendar 2009, a lower weighted-average selling price of our CMP slurries, higher fixed manufacturing costs and the negative effects of foreign exchange rate changes, partially offset by a higher-valued product mix.

RESEARCH, DEVELOPMENT AND TECHNICAL

Total research, development and technical expenses were $43.3 million for the nine months ended June 30, 2011, which represented an increase of 13.0%, or $5.0 million, from the nine months ended June 30, 2010.  The increase was primarily due to $2.7 million in higher staffing-related costs, related to higher staffing levels and certain employee separation costs, and $1.9 million in higher expenses for clean room materials.

SELLING AND MARKETING

Selling and marketing expenses were $22.1 million for the nine months ended June  30, 2011, which represented an increase of 11.1%, or $2.2 million, from the nine months ended June 30, 2010.  The increase was primarily due to $1.1 million in higher staffing-related costs, $0.5 million in higher travel-related costs and $0.2 million in higher professional fees.

GENERAL AND ADMINISTRATIVE

General and administrative expenses were $34.3 million for the nine months ended June 30, 2011, which represented a decrease of 11.2%, or $4.3 million, from the nine months ended June 30, 2010.  The decrease was primarily due to $5.3 million in lower professional fees, including costs to enforce our intellectual property, partially offset by $0.4 million in higher staffing-related costs and $0.4 million in higher depreciation expenses.

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OTHER INCOME (EXPENSE), NET

Other expense was $0.6 million for the nine months ended June 30, 2011 compared to $0.2 million during the nine months ended June 30, 2010.  The increase in other expense was primarily due to $0.7 million in foreign exchange effects on revenues and expenses, primarily related to changes in the exchange rate of the Japanese yen and the New Taiwan dollar to the U.S. dollar, net of the gains and losses incurred on forward foreign exchange contracts discussed in Note 7 of the Notes to the Consolidated Financial Statements, partially offset by an increase in miscellaneous income of $0.2 million.

PROVISION FOR INCOME TAXES

Our effective income tax rate was 32.7% for the nine months ended June 30, 2011 compared to a 35.2% effective income tax rate for the nine months ended June 30, 2010.  The decrease in the effective tax rate during the first nine months of fiscal 2011 reflects the election that we made in the fourth quarter of fiscal 2010 to permanently reinvest the earnings of certain of our foreign subsidiaries outside of the U.S. rather than repatriate those earnings to the U.S., and the reinstatement of the U.S. research and experimentation tax credit in December 2010, which was retroactively effective as of January 1, 2010.  These decreases were partially offset by the impact of $671 in income tax expense related to certain compensation in fiscal 2008 through 2010 for which a previous tax benefit should not have been recorded, and the reversal of a $497 deferred tax asset related to certain share-based compensation expense, as discussed in Note 1 of the Notes to the Consolidated Financial Statements under the heading “Results of Operations”.

NET INCOME

Net income was $42.4 million for the nine months ended June 30, 2011 which represented an increase of 24.0%, or $8.2 million, from the nine months ended June 30, 2010.  The increase was primarily due to the increased sales volume, partially offset by a lower gross margin percentage and increased operating expenses.

LIQUIDITY AND CAPITAL RESOURCES

We generated $59.6 million in cash flows from operating activities in the first nine months of fiscal 2011, compared to $67.3 million in cash from operating activities in the first nine months of fiscal 2010.  Our cash flows provided by operating activities in the first nine months of fiscal 2011 originated from $42.4 million in net income, $35.0 million in non-cash items and a $17.8 million decrease in cash flow due to a net increase in working capital.  The decrease in cash flows from operating activities compared to the first nine months of fiscal 2010 was primarily due to an increase in working capital associated with a significant income tax receivable due to the timing and size of tax payments in fiscal 2011 versus 2010, reductions in accrued liabilities and accounts payable, including the payment made in the first quarter of fiscal 2011 of our fiscal 2010 annual incentive cash bonus, as well as increases in accounts receivable and inventory balances due to the increase in sales in fiscal 2011, partially offset by increased net income and deferred income tax expense in fiscal 2011.

In the first nine months of fiscal 2011, cash flows used in investing activities were $18.3 million for purchases of property, plant and equipment, primarily for the construction of a manufacturing and research and development facility in South Korea, the expansion of our manufacturing capacity in Japan and for improvements in our information technology systems.  In the first nine months of fiscal 2010, cash flows used in investing activities were $8.2 million, representing purchases of property, plant and equipment.  We continue to estimate that our total capital expenditures in fiscal 2011 will be approximately $35.0 million, including approximately $13.0 million for our facility in South Korea.

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In the first nine months of fiscal 2011, cash flows used in financing activities were $4.2 million, which reflected cash outflows of $40.0 million in repurchases of common stock under our share repurchase program, $1.4 million in repurchases of common stock pursuant to the terms of our Second Amended and Restated Cabot Microelectronics Corporation 2000 Equity Incentive Plan (EIP) for shares withheld from employees to cover payroll taxes on the vesting of restricted stock granted under the EIP, and $1.0 million in principal payments under capital lease obligations.  These cash outflows were partially offset by $37.2 million received from the issuance of common stock related to the exercise of stock options granted under our EIP and our 2007 Employee Stock Purchase Plan, as amended and restated January 1, 2010.  In addition, we received $1.0 million in tax benefits related to exercises of stock options and vesting of restricted stock granted under our EIP.  In the first nine months of fiscal 2010, cash flows used in financing activities were $9.0 million, representing $10.0 million in repurchases of common stock under our share repurchase plan, $0.8 million in repurchases of common stock pursuant to the terms of our EIP for shares withheld from employees to cover payroll taxes on the vesting of restricted stock granted under the EIP and $0.9 million in principal payments under capital lease obligations, partially offset by $2.6 million received from the issuance of common stock under our EIP.

In January 2008, our Board of Directors authorized a share repurchase program for up to $75.0 million of our outstanding common stock.  We repurchased 564,568 shares for $25.0 million during the first nine months of fiscal 2011 under this program, which was completed during the fiscal quarter ended March 31, 2011.  We also repurchased 263,550 shares for $10.0 million during the first nine months of fiscal 2010 under this program.  In November 2010, our Board of Directors authorized a new share repurchase program for up to $125.0 million of our outstanding common stock, which became effective on the authorization date.  We repurchased 304,100 shares for $15.0 million during the third quarter of fiscal 2011 under this new program.  Share repurchases are made from time to time, depending on market conditions, in open market transactions, at management’s discretion.  We fund share purchases under these programs from our available cash balance.

We have an unsecured revolving credit facility of $50.0 million with an option to increase the facility to $80.0 million.  Pursuant to an amendment we entered into in October 2008, the agreement extends through October 2011, with an option to renew for two additional one-year terms.  In November 2010, the scheduled termination date was extended by one year through October 2012.  In July 2011, we provided notice of our intention to renew the credit facility for an additional year through October 2013.  Under this agreement, interest accrues on any outstanding balance at either the lending institution’s base rate or the Eurodollar rate plus an applicable margin.  We also pay a non-use fee.  Loans under this facility are intended primarily for general corporate purposes, including financing working capital, capital expenditures and acquisitions.  The credit agreement also contains various covenants.  No amounts are currently outstanding under this credit facility and we believe we are currently in compliance with the covenants.

As of June 30, 2011, we had $292.9 million of cash and cash equivalents, $28.1 million of which was held at certain foreign subsidiaries where we have made a current election to permanently reinvest the earnings rather than repatriate the earnings to the U.S.  If we choose to repatriate these earnings in the future through dividends or loans to the U.S. parent company, the earnings could become subject to additional income tax expense.

We believe that our current balance of cash and long-term investments, cash generated by our operations and available borrowings under our revolving credit facility will be sufficient to fund our operations, expected capital expenditures, merger and acquisition activities, and share repurchases for the foreseeable future.  However, we plan to further expand our business; therefore, we may need to raise additional funds in the future through equity or debt financing, strategic relationships or other arrangements.  Depending on future conditions in the capital and credit markets, we could encounter difficulty securing additional financing in the type or amount necessary to pursue these objectives.

OFF-BALANCE SHEET ARRANGEMENTS

At June 30, 2011, and September 30, 2010, we did not have any unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, which might have been established for the purpose of facilitating off-balance sheet arrangements.

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TABULAR DISCLOSURE OF CONTRACTUAL OBLIGATIONS

The following summarizes our contractual obligations at June 30, 2011, and the effect such obligations are expected to have on our liquidity and cash flow in future periods.

CONTRACTUAL OBLIGATIONS			Less Than			1-3		3-5	After 5
(In millions)	Total		1 Year		Years		Years		Years
Purchase obligations	$	46.7	$	42.9	$	2.9	$	0.3	$	0.6
Capital lease obligations		0.3		0.3		-		-		-
Operating leases		10.1		3.6		3.2		1.8		1.5
Other long-term liabilities		5.9		-		-		-		5.9
Total contractual obligations	$	63.0	$	46.8	$	6.1	$	2.1	$	8.0

We operate under a fumed silica supply agreement with Cabot Corporation, our former parent company which is not a related party, under which we are generally obligated to purchase at least 90% of our six-month volume forecast for certain of our slurry products, to purchase certain minimum quantities every six months, and to pay for the shortfall if we purchase less than these amounts.  This agreement was amended in April 2008 to extend the termination date to December 2012 and to change the pricing and some other non-material terms of the agreement.  We currently anticipate we will not have to pay any shortfall under this agreement.  We also operate under a fumed alumina supply agreement with Cabot Corporation that runs through December 2011, under which we are obligated to pay certain fixed, capital and variable costs, which are no longer material to our business.  Purchase obligations include an aggregate amount of $17.6 million of contractual commitments for fumed silica and fumed alumina under these contracts.

Refer to Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of Part II of our annual report on Form 10-K for the fiscal year ended September 30, 2010, for additional information regarding our contractual obligations.

ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

EFFECT OF CURRENCY EXCHANGE RATES AND EXCHANGE RATE RISK MANAGEMENT

We conduct business operations outside of the United States through our foreign operations.  Some of our foreign operations maintain their accounting records in their local currencies.  Consequently, period to period comparability of results of operations is affected by fluctuations in exchange rates.  The primary foreign currencies to which we have exposure are the Japanese yen and the New Taiwan dollar.  From time to time we enter into forward contracts in an effort to manage foreign currency exchange exposure.  However, we are unlikely to be able to hedge these exposures completely.  During the nine months ended June 30, 2011, we recorded $8.0 million in currency translation gains, net of tax, that are included in other comprehensive income on our Consolidated Balance Sheet.  These gains primarily relate to the general fluctuations of the U.S. dollar relative to the Japanese yen and the New Taiwan dollar.  Approximately 13% of our revenue is transacted in currencies other than the U.S. dollar.  However, we also incur expenses in foreign countries that are transacted in currencies other than the U.S. dollar, which reduces the net exposure on the Consolidated Statement of Income.  We do not currently enter into forward exchange contracts or other derivative instruments for speculative or trading purposes.

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MARKET RISK AND SENSITIVITY ANALYSIS RELATED TO FOREIGN EXCHANGE RATE RISK

Over the past 24 months, there has been a significant weakening of the U.S. dollar against the Japanese yen, which has had some negative impact on our results of operations.  We have performed a sensitivity analysis assuming a hypothetical additional 10% adverse movement in foreign exchange rates.  As of June 30, 2011, the analysis demonstrated that such market movements would not have a material adverse effect on our consolidated financial position, results of operations or cash flows over a one-year period.  Actual gains and losses in the future may differ materially from this analysis based on changes in the timing and amount of foreign currency rate movements and our actual exposures.

MARKET RISK RELATED TO INVESTMENTS IN AUCTION RATE SECURITIES

At June 30, 2011, we owned two auction rate securities (ARS) with a total estimated fair value of $8.1 million ($8.3 million par value) which were classified as other long-term assets on our Consolidated Balance Sheet.  Beginning in 2008, general uncertainties in the global credit markets significantly reduced liquidity in the ARS market, and this illiquidity continues.  For more information on our ARS, see Notes 2 and 5 of the Notes to the Consolidated Financial Statements and the “Risk Factors” set forth in Part II, Item 1A of this Quarterly Report on Form 10-Q.

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ITEM 4. CONTROLS AND PROCEDURES

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES

Our management, with the participation of our Chief Executive Officer (CEO) and Chief Financial Officer (CFO), has conducted an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended) as of June 30, 2011.  Based on that evaluation, our CEO and CFO have concluded that our disclosure controls and procedures were effective to ensure that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and to ensure that such information is accumulated and communicated to management, including the CEO and CFO, as appropriate to allow timely decisions regarding required disclosure.

While we believe the present design of our disclosure controls and procedures is effective enough to make known to our senior management in a timely fashion all material information concerning our business, we intend to continue to improve the design and effectiveness of our disclosure controls and procedures to the extent we believe necessary in the future to provide our senior management with timely access to such material information, and to correct deficiencies that we may discover in the future, as appropriate.

CHANGES IN INTERNAL CONTROL OVER FINANCIAL REPORTING

There were no changes in our internal control over financial reporting that occurred during our most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

INHERENT LIMITATIONS ON EFFECTIVENESS OF CONTROLS

Because of inherent limitations, our disclosure controls or our internal control over financial reporting may not prevent all errors and all fraud.  A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met.  Further, the design of a control system must take into account the benefits of controls relative to their costs.  Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected.  These inherent limitations include possible faulty judgment in decision making and breakdowns due to a simple error or mistake.  Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the controls.  The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions.  Over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate.  Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

While we are not involved in any legal proceedings that we believe will have a material impact on our consolidated financial position, results of operations or cash flows, we periodically become a party to legal proceedings in the ordinary course of business.  For example, in January 2007, we filed a legal action against DuPont Air Products NanoMaterials LLC (DA Nano), a CMP slurry competitor, in the United States District Court for the District of Arizona, charging that DA Nano’s manufacturing and marketing of CMP slurries infringe certain CMP slurry patents that we own.  The affected DA Nano products include certain products used for tungsten CMP.  We filed our infringement complaint as a counterclaim in response to an action filed by DA Nano in the same court in December 2006 that sought declaratory relief and alleged non-infringement, invalidity and unenforceability regarding some of the patents at issue in our complaint against DA Nano.  DA Nano filed its complaint following our refusal of its request that we license to it our patents raised in its complaint.  DA Nano’s complaint did not allege any infringement by our products of intellectual property owned by DA Nano.  From June 14 through July 8, 2010, a jury trial for the case was held.  All of Cabot Microelectronics’ patents at issue in the case were found valid.  However, the jury found that DA Nano’s products at issue do not infringe the asserted claims of these patents.  In November 2010, we filed a Notice of Appeal regarding infringement, which is still pending, and DA Nano filed a cross-appeal regarding validity.  However, DA Nano has since voluntarily dropped its cross-appeal, and our patents remain adjudicated as valid.  While the outcome of this and any legal matter cannot be predicted with certainty, we continue to believe that our claims in the pending action are meritorious, and we intend to continue to pursue them.

ITEM 1A. RISK FACTORS

We do not believe there have been any material changes in our risk factors since the filing of our Annual Report on Form 10-K for the fiscal year ended September 30, 2010.  However, we may update our risk factors in our SEC filings from time to time for clarification purposes or to include additional information, at management's discretion, even when there have been no material changes.

RISKS RELATING TO OUR BUSINESS

DEMAND FOR OUR PRODUCTS FLUCTUATES AND OUR BUSINESS MAY BE ADVERSELY AFFECTED BY WORLDWIDE ECONOMIC AND INDUSTRY CONDITIONS

Our business is affected by economic and industry conditions and our revenue is dependent upon semiconductor demand.  Semiconductor demand, in turn, is impacted by semiconductor industry cycles, and these cycles can dramatically affect our business.  These cycles may be characterized by rapid increases or decreases in product demand, excess or low customer inventories, and rapid changes in prices of IC devices.  For example, the semiconductor industry has grown significantly during the past 24 months following a severe economic downturn, and generally, overall demand for our products has followed this same cycle.  Some industry analysts and customers now indicate there appears to be some near-term softening of demand.  In addition, our business has experienced historical seasonal trends as evidenced by a decrease in our revenue in the second quarter of fiscal 2011 from the revenue recorded in the first quarter of 2011, and an increase in revenue in the third quarter of fiscal 2011.  Our limited visibility to future customer orders makes it difficult for us to predict industry trends.  If the global economy weakens, whether in general or as a result of specific factors, such as the March 2011 disasters in Japan, we could experience material adverse impacts on our results of operations and financial condition.

Adverse global economic conditions may have other negative effects on our Company.  For instance, we may experience negative impacts on cash flows due to the inability of our customers to pay their obligations to us or our production process may be harmed if our suppliers cannot fulfill their obligations to us.  We may also have to reduce the carrying value of goodwill and other intangible assets, which could harm our financial position and results of operations.

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Some additional factors that affect demand for our products include: the types of products that our customers may produce, such as logic devices versus memory devices; the various nodes at which those products are manufactured; customers’ specific manufacturing process integration schemes; the short order to delivery time for our products; quarter-to-quarter changes in customer order patterns; market share gains and losses; pricing changes by us and our competitors.

WE HAVE A NARROW PRODUCT RANGE AND OUR PRODUCTS MAY BECOME OBSOLETE, OR TECHNOLOGICAL CHANGES MAY REDUCE OR LIMIT INCREASES IN THE CONSUMPTION OF CMP SLURRIES AND PADS

Our business is substantially dependent on a single class of products, CMP slurries, which account for the majority of our revenue.  Our business in CMP pads is also developing and growing.  Our business would suffer if these products became obsolete or if consumption of these products decreased.  Our success depends on our ability to keep pace with technological changes and advances in the semiconductor industry and to adapt, improve and customize our products for advanced IC applications in response to evolving customer needs and industry trends.  Since its inception, the semiconductor industry has experienced rapid technological changes and advances in the design, manufacture, performance and application of IC devices, and our customers continually pursue lower cost of ownership and higher performance of materials consumed in their manufacturing processes, including CMP slurries and pads, as a means to reduce the costs and increase the yield in their manufacturing facilities.  We expect these technological changes and advances, and this drive toward lower costs and higher yields, will continue in the future.  Potential technology developments in the semiconductor industry, as well as our customers’ efforts to reduce consumption of CMP consumables and to possibly reuse or recycle these products, could render our products less important to the IC device manufacturing process.

A SIGNIFICANT AMOUNT OF OUR BUSINESS COMES FROM A LIMITED NUMBER OF LARGE CUSTOMERS AND OUR REVENUE AND PROFITS COULD DECREASE SIGNIFICANTLY IF WE LOST ONE OR MORE OF THESE CUSTOMERS

Our customer base is concentrated among a limited number of large customers.  The number of semiconductor manufacturers has declined both through mergers and acquisitions as well as through strategic alliances.  Industry analysts predict that this trend will continue, which means the semiconductor industry will be comprised of fewer and larger participants if their prediction is correct.  One or more of these principal customers could stop buying CMP consumables from us or could substantially reduce the quantity of CMP consumables purchased from us.  Our principal customers also hold considerable purchasing power, which can impact the pricing and terms of sale of our products.  Any deferral or significant reduction in CMP consumables sold to these principal customers, or a significant number of smaller customers, could seriously harm our business, financial condition and results of operations.

During the nine months ended June 30, 2011 and 2010, our five largest customers accounted for approximately 48% and 47% of our revenue, respectively.  During the nine months ended June 30, 2011, Taiwan Semiconductor Manufacturing Company (TSMC) and United Microelectronics Corporation (UMC) were our largest customers accounting for approximately 17% and 10%, respectively, of our revenue.  During the nine months ended June 30, 2010, TSMC and UMC accounted for approximately 18% and less than 10%, respectively, of our revenue.  During full fiscal year 2010, our five largest customers accounted for approximately 48% of our revenue, with TSMC and UMC accounting for approximately 18% and 11%, respectively.

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OUR BUSINESS COULD BE SERIOUSLY HARMED IF OUR COMPETITORS DEVELOP SUPERIOR SLURRY PRODUCTS, OFFER BETTER PRICING TERMS OR SERVICE, OR OBTAIN CERTAIN INTELLECTUAL PROPERTY RIGHTS

Competition from other CMP slurry manufacturers could seriously harm our business and results of operations.  Competition from other providers of CMP slurries could continue to increase, and opportunities exist for other companies to emerge as potential competitors by developing their own CMP slurry products.  Increased competition has and may continue to impact the prices we are able to charge for our slurry products as well as our overall business.  In addition, our competitors could have or obtain intellectual property rights which could restrict our ability to market our existing products and/or to innovate and develop new products.

ANY PROBLEM OR DISRUPTION IN OUR SUPPLY CHAIN, INCLUDING SUPPLY OF OUR MOST IMPORTANT RAW MATERIALS, OR IN OUR ABILITY TO MANUFACTURE AND DELIVER OUR PRODUCTS TO OUR CUSTOMERS,  COULD ADVERSELY AFFECT OUR RESULTS OF OPERATIONS

We depend on our supply chain to enable us to meet the demands of our customers.  Our supply chain includes the raw materials we use to manufacture our products, our production operations, and the means by which we deliver our products to our customers.  Our business could be adversely affected by any problem or interruption in our supply of the key raw materials we use in our CMP slurries and pads, including fumed silica, which we use for certain of our slurries, or any problem or interruption that may occur during production or delivery of our products, such as weather-related problems or natural disasters, such as the March 2011 earthquakes and tsunami in Japan.  Consistent with our initial assessment in our second fiscal quarter of 2011, these natural disasters have not had a significant impact on the semiconductor industry, or on our business or supply chain.  Yet, it still is unclear what long-term effects these disasters may have on Japan’s economy and on the global economic environment as Japan represents the world’s third largest economy.  Our supply chain may also be negatively impacted by unanticipated price increases due to supply restrictions beyond the control of our Company or our raw material suppliers.

For instance, Cabot Corporation continues to be our primary supplier of particular amounts and types of fumed silica.  We believe it would be difficult to promptly secure alternative sources of key raw materials, including fumed silica, in the event one of our suppliers becomes unable to supply us with sufficient quantities of raw materials that meet the quality and technical specifications required by our customers.  In addition, contractual amendments to the existing agreements with, or non-performance by, our suppliers, including any significant financial distress our suppliers may suffer, could adversely affect us.Also, if we change the supplier or type of key raw materials we use to make our CMP slurries or pads, or are required to purchase them from a different manufacturer or manufacturing facility or otherwise modify our products, in certain circumstances our customers might have to requalify our CMP slurries and pads for their manufacturing processes and products.  The requalification process could take a significant amount of time and expense to complete and could motivate our customers to consider purchasing products from our competitors, possibly interrupting or reducing our sales of CMP consumables to these customers.

WE ARE SUBJECT TO RISKS ASSOCIATED WITH OUR FOREIGN OPERATIONS

We currently have operations and a large customer base outside of the United States.  Approximately 87% and 86% of our revenue was generated by sales to customers outside of the United States for the nine months ended June 30, 2011 and the full fiscal year ended September 30, 2010, respectively.  We encounter risks in doing business in certain foreign countries, including, but not limited to, adverse changes in economic and political conditions, fluctuation in exchange rates, compliance with a variety of foreign laws and regulations, as well as difficulty in enforcing business and customer contracts and agreements, including protection of intellectual property rights.  We also encounter the risks that we may not be able to repatriate the earnings from certain of our foreign operations, derive the anticipated tax benefits of our foreign operations or recover the investments made in our foreign operations.

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WE MAY PURSUE ACQUISITIONS OF, INVESTMENTS IN, AND STRATEGIC ALLIANCES WITH OTHER ENTITIES, WHICH COULD DISRUPT OUR OPERATIONS AND HARM OUR OPERATING RESULTS IF THEY ARE UNSUCCESSFUL

We expect to continue to make investments in technologies, assets and companies, either through acquisitions, investments or alliances, in order to supplement our internal growth and development efforts.  Acquisitions and investments, such as our acquisition of Epoch Material Co., Ltd., a Taiwan-based company,  involve numerous risks, including the following: difficulties and risks in integrating the operations, technologies, products and personnel of acquired companies; diversion of management’s attention from normal daily operations of the business; increased risk associated with foreign operations; potential difficulties and risks in entering markets in which we have limited or no direct prior experience and where competitors in such markets have stronger market positions; potential difficulties in operating new businesses with different business models; potential difficulties with regulatory or contract compliance in areas in which we have limited experience; initial dependence on unfamiliar supply chains or relatively small supply partners; insufficient revenues to offset increased expenses associated with acquisitions; potential loss of key employees of the acquired companies; or inability to effectively cooperate and collaborate with our alliance partners.

Further, we may never realize the perceived or anticipated benefits of a business combination, asset acquisition or investments in other entities.  Acquisitions by us could have negative effects on our results of operations, in areas such as contingent liabilities, gross profit margins, amortization charges related to intangible assets and other effects of accounting for the purchases of other business entities.  Investments in and acquisitions of technology-related companies or assets are inherently risky because these businesses or assets may never develop, and we may incur losses related to these investments.  In addition, we may be required to write down the carrying value of these acquisitions or investments to reflect other than temporary declines in their value, which could harm our business and results of operations.

BECAUSE WE HAVE LIMITED EXPERIENCE IN BUSINESS AREAS OUTSIDE OF CMP SLURRIES, EXPANSION OF OUR BUSINESS INTO NEW PRODUCTS AND APPLICATIONS MAY NOT BE SUCCESSFUL

An element of our strategy has been to leverage our current customer relationships and technological expertise to expand our CMP business from CMP slurries into other areas, such as CMP polishing pads.  Additionally, pursuant to our Engineered Surface Finishes business, we are pursuing other surface modification applications.  Expanding our business into new product areas could involve technologies, production processes and business models in which we have limited experience, and we may not be able to develop and produce products or provide services that satisfy customers’ needs or we may be unable to keep pace with technological or other developments.  Also, our competitors may have or obtain intellectual property rights which could restrict our ability to market our existing products and/or to innovate and develop new products.

BECAUSE WE RELY HEAVILY ON OUR INTELLECTUAL PROPERTY, OUR FAILURE TO ADEQUATELY OBTAIN OR PROTECT IT COULD SERIOUSLY HARM OUR BUSINESS

Protection of intellectual property is particularly important in our industry because we develop complex technical formulas for CMP products that are proprietary in nature and differentiate our products from those of our competitors.  Our intellectual property is important to our success and ability to compete.  We attempt to protect our intellectual property rights through a combination of patent, trademark, copyright and trade secret laws, as well as employee and third-party nondisclosure and assignment agreements.  Due to our international operations, we pursue protection in different jurisdictions, which may provide varying degrees of protection, and we cannot provide assurance that we can obtain adequate protection in each such jurisdiction.  Our failure to obtain or maintain adequate protection of our intellectual property rights for any reason, including through the patent prosecution process or in the event of litigation related to such intellectual property, such as the current litigation between us and DuPont Air Products NanoMaterials (DA Nano), in which the validity of all of our patents at issue in the matter was upheld as further described above in “Legal Proceedings” in this Quarterly Report on Form 10-Q, could seriously harm our business.  In addition, the costs of obtaining or protecting our intellectual property could negatively affect our operating results.  For example, in fiscal 2010, costs associated with enforcing our intellectual property caused our operating expenses to increase.

31

WE MAY NOT BE ABLE TO MONETIZE OUR INVESTMENTS IN AUCTION RATE SECURITIES IN THE SHORT TERM AND WE COULD EXPERIENCE A DECLINE IN THEIR MARKET VALUE, WHICH COULD ADVERSELY AFFECT OUR FINANCIAL RESULTS

We owned auction rate securities (ARS) with an estimated fair value of $8.1 million ($8.3 million par value) at June 30, 2011, which were classified as other long-term assets on our Consolidated Balance Sheet.  If current illiquidity in the ARS market does not lessen, if issuers of our ARS are unable to refinance the underlying securities, or are unable to pay debt obligations and related bond insurance fails, or if credit ratings decline or other adverse developments occur in the credit markets, then we may not be able to monetize these securities in the foreseeable future.  We may also be required to further adjust the carrying value of these instruments through an impairment charge that may be deemed other-than-temporary which would adversely affect our financial results.

OUR INABILITY TO ATTRACT AND RETAIN KEY PERSONNEL COULD CAUSE OUR BUSINESS TO SUFFER

If we fail to attract and retain the necessary managerial, technical and customer support personnel, our business and our ability to maintain existing and obtain new customers, develop new products and provide acceptable levels of customer service could suffer.  We compete with other industry participants for qualified personnel, particularly those with significant experience in the semiconductor industry.  The loss of services of key employees could harm our business and results of operations.

RISKS RELATING TO THE MARKET FOR OUR COMMON STOCK

THE MARKET PRICE MAY FLUCTUATE SIGNIFICANTLY AND RAPIDLY

The market price of our common stock has fluctuated and could continue to fluctuate significantly as a result of factors such as: economic and stock market conditions generally and specifically as they may impact participants in the semiconductor and related industries; changes in financial estimates and recommendations by securities analysts who follow our stock; earnings and other announcements by, and changes in market evaluations of, us or participants in the semiconductor and related industries; changes in business or regulatory conditions affecting us or participants in the semiconductor and related industries; announcements or implementation by us, our competitors, or our customers of technological innovations, new products or different business strategies; and trading volume of our common stock.

ANTI-TAKEOVER PROVISIONS UNDER OUR CERTIFICATE OF INCORPORATION AND BYLAWS MAY DISCOURAGE THIRD PARTIES FROM MAKING AN UNSOLICITED BID FOR OUR COMPANY

Our certificate of incorporation, our bylaws, and various provisions of the Delaware General Corporation Law may make it more difficult or expensive to effect a change in control of our Company.  For instance, our amended and restated certificate of incorporation provides for the division of our Board of Directors into three classes as nearly equal in size as possible with staggered three-year terms.  Until April 2010, we had a rights plan which expired according to the terms of the plan.

We have adopted change in control arrangements covering our executive officers and other key employees.  These arrangements provide for a cash severance payment, continued medical benefits and other ancillary payments and benefits upon termination of service of a covered employee’s employment following a change in control, which may make it more expensive to acquire our Company.

32

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

ISSUER PURCHASES OF EQUITY SECURITIES

Period	Total Number of Shares Purchased	Average Price Paid Per Share	Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs (in thousands)
Apr. 1 through Apr. 30, 2011	74	$51.88	-	$125,000
May 1 through May 31, 2011	269,500	$49.35	269,500	$111,699
Jun. 1 through Jun. 30, 2011	34,666	$49.08	34,600	$110,001
Total	304,240	$49.32	304,100	$110,001

In January 2008, our Board of Directors authorized a share repurchase program for up to $75.0 million of our outstanding common stock.  We completed this repurchase program during the fiscal quarter ended March 31, 2011.  In November 2010, our Board of Directors authorized a new share repurchase program for up to $125.0 million of our outstanding common stock.  We repurchased 304,100 shares for $15.0 million during the quarter ended June 30, 2011 under this new program.  Share repurchases are made from time to time, in open market transactions, depending on market conditions, at management’s discretion.  The program, which became effective on the authorization date, may be suspended or terminated at any time, at the Company’s discretion.  We fund share purchases under these programs from our available cash balance.

Separate from this share repurchase program, a total of 140 shares were purchased during the third quarter of fiscal 2011 pursuant to the terms of our Second Amended and Restated Cabot Microelectronics Corporation 2000 Equity Incentive Plan (EIP) as shares withheld from award recipients and to cover payroll taxes on the vesting of shares of restricted stock granted under the EIP.

ITEM 6. EXHIBITS

The exhibit numbers in the following list correspond to the number assigned to such exhibits in the Exhibit Table of Item 601 of Regulation S-K:

Exhibit Number	Description
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

33

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	CABOT MICROELECTRONICS CORPORATION
Date: August 8, 2011	/s/ WILLIAM S. JOHNSON
	William S. Johnson
	Vice President and Chief Financial Officer
	[Principal Financial Officer]
Date: August 8, 2011	/s/ THOMAS S. ROMAN
	Thomas S. Roman
	Corporate Controller
	[Principal Accounting Officer]

34

EX-31.1

Exhibit 31.1

CERTIFICATION

I, William P. Noglows, Chief Executive Officer of Cabot Microelectronics Corporation, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Cabot Microelectronics Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors:

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 8, 2011	/s/ WILLIAM P. NOGLOWS
	William P. Noglows
	Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, William S. Johnson, Chief Financial Officer of Cabot Microelectronics Corporation, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Cabot Microelectronics Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors:

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 8, 2011	/s/ WILLIAM S. JOHNSON
	William S. Johnson
	Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Cabot Microelectronics Corporation (the "Company") on Form 10-Q for the fiscal quarter ended June 30, 2011 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), each of the undersigned officers of the Company certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 8, 2011	/s/ WILLIAM P. NOGLOWS
	William P. Noglows
	Chief Executive Officer
Date: August 8, 2011	/s/ WILLIAM S. JOHNSON
	William S. Johnson
	Chief Financial Officer

XML



CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Sep. 30, 2010
Current assets:
Cash and cash equivalents	$ 292,939	$ 254,164
Accounts receivable, less allowance for doubtful accounts of $1,130 at June 30, 2011, and $1,121 at September 30, 2010	56,989	57,456
Inventories	54,747	51,896
Prepaid expenses and other current assets	24,562	13,973
Deferred income tax assets, current	4,560	3,540
Total current assets	433,797	381,029
Property, plant and equipment, net	125,381	115,811
Goodwill	43,080	40,436
Other intangible assets, net	15,852	17,089
Deferred income tax assets, noncurrent	0	8,044
Other long-term assets	10,718	9,347
Total assets	628,828	571,756
Current liabilities:
Accounts payable	18,543	17,521
Capital lease obligations	340	1,296
Accrued expenses and other current liabilities	31,053	34,513
Total current liabilities	49,936	53,330
Capital lease obligations, net of current portion	4	12
Deferred income tax liabilities, noncurrent	3,131	0
Other long-term liabilities	5,922	4,071
Total liabilities	58,993	57,413
Commitments and contingencies (Note 8)
Stockholders' equity:
Common Stock: Authorized: 200,000,000 shares, $0.001 par value; Issued: 27,646,352 shares at June 30, 2011, and 26,384,715 shares at September 30, 2010	28	26
Capital in excess of par value of common stock	274,546	228,103
Retained earnings	426,140	383,767
Accumulated other comprehensive income	26,599	18,538
Treasury stock at cost, 4,348,427 shares at June 30, 2011, and 3,446,069 shares at September 30, 2010	(157,478)	(116,091)
Total stockholders' equity	569,835	514,343
Total liabilities and stockholders' equity	$ 628,828	$ 571,756

XML



CONSOLIDATED BALANCE SHEETS Parenthetical (USD $) In Thousands, except Share data	Jun. 30, 2011	Sep. 30, 2010
Current assets:
Allowance for doubtful accounts	$ 1,130	$ 1,121
Stockholders' equity:
Common stock: authorized	200,000,000	200,000,000
Common stock: par value	$ 0.001	$ 0.001
Common stock: issued	27,646,352	26,384,715
Treasury stock at cost, shares	4,348,427	3,446,069

XML



GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

9 Months Ended

Jun. 30, 2011

GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]

Components of other intangible assets

The components of other intangible assets are as follows:

	June 30, 2011				September 30, 2010
	Gross Carrying		Accumulated		Gross Carrying		Accumulated
	Amount		Amortization		Amount		Amortization
Other intangible assets subject to amortization:
Product technology	$	8,430	$	3,707	$	8,206	$	2,926
Acquired patents and licenses		8,115		6,368		8,115		6,135
Trade secrets and know-how		2,550		2,550		2,550		2,550
Distribution rights, customer lists and other		12,738		4,546		11,939		3,300
Total other intangible assets subject to amortization		31,833		17,171		30,810		14,911
Total other intangible assets not subject to amortization*		1,190				1,190
Total other intangible assets	$	33,023	$	17,171	$	32,000	$	14,911

*       Total other intangible assets not subject to amortization consist primarily of trade names.

Estimated future amortization expense for succeeding five fiscal years

Estimated future amortization expense for the five succeeding fiscal years is as follows:

Fiscal Year	Estimated Amortization Expense
Remainder of 2011	$     688
2012	2,718
2013	2,551
2014	2,506
2015	2,465

XML



Document And Entity Information (USD $)	9 Months Ended
	Jun. 30, 2011	Jul. 29, 2011	Mar. 31, 2010
Entity Registrant Name	CABOT MICROELECTRONICS CORP
Entity Central Index Key	0001102934
Current Fiscal Year End Date	--09-30
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 875,948,700
Entity Common Stock, Shares Outstanding		23,303,839
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2011

XML



DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Jun. 30, 2011

DERIVATIVE FINANCIAL INSTRUMENTS [Abstract]

Schedule of fair value of derivative instruments in the Consolidated Balance Sheet

The fair value of our derivative instrument included in the Consolidated Balance Sheet was as follows:

		Asset Derivatives				Liability Derivatives
	Balance Sheet Location	Fair Value at June 30, 2011		Fair Value at September 30, 2010		Fair Value at June 30, 2011		Fair Value at September 30, 2010
Derivatives not designated as hedging instruments
Foreign exchange contracts	Prepaid expenses and other current assets	$	6	$	5	$	-	$	-
	Accrued expenses and other current liabilities	$	-	$	-	$	-	$	-

Schedule of the effect of derivative instruments on the Consolidated Statement of Income

The following table summarizes the effect of our derivative instrument on our Consolidated Statement of Income for the three and nine months ended June 30:

		Gain (Loss) Recognized in Statement of Income
		Three Months Ended						Nine Months Ended
	Statement of Income Location	June 30, 2011			June 30, 2010			June 30, 2011			June 30, 2010
Derivatives not designated as hedging instruments
Foreign exchange contracts	Other income (expense), net	$	(186	)	$	(511	)	$	(248	)	$	(41	)

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FINANCIAL INFORMATION BY INDUSTRY SEGMENT AND PRODUCT LINE (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Schedule of Segment Reporting Information, By Product Line [Line Items]
Revenue	$ 111,846	$ 101,655	$ 335,711	$ 297,883
Tungsten slurries [Member]
Schedule of Segment Reporting Information, By Product Line [Line Items]
Revenue	40,889	35,983	123,094	107,432
Dielectric slurries [Member]
Schedule of Segment Reporting Information, By Product Line [Line Items]
Revenue	30,998	30,529	91,926	85,787
Copper slurries [Member]
Schedule of Segment Reporting Information, By Product Line [Line Items]
Revenue	20,103	19,404	60,119	54,866
Polishing pads [Member]
Schedule of Segment Reporting Information, By Product Line [Line Items]
Revenue	7,561	7,818	23,650	21,673
Data storage slurries [Member]
Schedule of Segment Reporting Information, By Product Line [Line Items]
Revenue	6,863	4,796	20,948	15,906
Engineered Surface Finishes [Member]
Schedule of Segment Reporting Information, By Product Line [Line Items]
Revenue	$ 5,432	$ 3,125	$ 15,974	$ 12,219

XML



DERIVATIVE FINANCIAL INSTRUMENTS

9 Months Ended

Jun. 30, 2011

DERIVATIVE FINANCIAL INSTRUMENTS [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS

7. DERIVATIVE FINANCIAL INSTRUMENTS

Periodically we enter into forward foreign exchange contracts in an effort to mitigate the risks associated with currency fluctuations on certain foreign currency balance sheet exposures.  Our foreign exchange contracts do not qualify for hedge accounting; therefore, the gains and losses resulting from the impact of currency exchange rate movements on our forward foreign exchange contracts are recognized as other income or expense in the accompanying consolidated income statements in the period in which the exchange rates change.  We do not use derivative financial instruments for trading or speculative purposes.  In addition, all derivatives, whether designated in hedging relationships or not, are required to be recorded on the balance sheet at fair value.  At June 30, 2011, we had one forward foreign exchange contract to sell Japanese yen related to intercompany notes with one of our subsidiaries in Japan and for the purpose of hedging the risk associated with a net transactional exposure in Japanese yen.

The fair value of our derivative instrument included in the Consolidated Balance Sheet was as follows:

		Asset Derivatives				Liability Derivatives
	Balance Sheet Location	Fair Value at June 30, 2011		Fair Value at September 30, 2010		Fair Value at June 30, 2011		Fair Value at September 30, 2010
Derivatives not designated as hedging instruments
Foreign exchange contracts	Prepaid expenses and other current assets	$	6	$	5	$	-	$	-
	Accrued expenses and other current liabilities	$	-	$	-	$	-	$	-

The following table summarizes the effect of our derivative instrument on our Consolidated Statement of Income for the three and nine months ended June 30:

		Gain (Loss) Recognized in Statement of Income
		Three Months Ended						Nine Months Ended
	Statement of Income Location	June 30, 2011			June 30, 2010			June 30, 2011			June 30, 2010
Derivatives not designated as hedging instruments
Foreign exchange contracts	Other income (expense), net	$	(186	)	$	(511	)	$	(248	)	$	(41	)

XML



CONTINGENCIES (Tables)

9 Months Ended

Jun. 30, 2011

CONTINGENCIES [Abstract]

Schedule of product warranty reserve activity

Our warranty reserve requirements changed during the first nine months of fiscal 2011 as follows:

Balance as of September 30, 2010	$	375
Reserve for product warranty during the reporting period		814
Settlement of warranty		(832	)
Balance as of June 30, 2011	$	357

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OTHER INCOME (EXPENSE), NET (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Other Income (Expense) Net [Line Items]
Other income (expense) net	$ (311)	$ 172	$ (600)	$ (207)
Interest Income [Member]
Other Income (Expense) Net [Line Items]
Other income (expense) net	53	68	194	150
Interest Expense [Member]
Other Income (Expense) Net [Line Items]
Other income (expense) net	(30)	(53)	(111)	(184)
Other Income (Expense) [Member]
Other Income (Expense) Net [Line Items]
Other income (expense) net	$ (334)	$ 157	$ (683)	$ (173)

XML



OTHER LONG-TERM ASSETS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2011	Jun. 30, 2011	Sep. 30, 2010
OTHER LONG-TERM ASSETS [Abstract]
Long-term ARS		$ 8,041	$ 8,066
Other long-term assets		1,722	1,281
Other long-term investments		955	0
Total		10,718	9,347
Number of Auction rate securities		2
Number of Auction Rate Securities, pretax reduction maintained		1
Reduction in fair value Auction Rate Securities, pretax		234
Reduction in fair value Auction Rate Securities, net of tax		151
Monetization of Auction Rate Securities	25
Long-term liability, SERP investments		$ 955

XML



OTHER LONG-TERM ASSETS(Tables)

9 Months Ended

Jun. 30, 2011

OTHER LONG-TERM ASSETS [Abstract]

Schedule of other long-term assets

Other long-term assets consisted of the following:

	June 30,		September 30,
	2011		2010
Long-term ARS	$	8,041	$	8,066
Other long-term assets		1,722		1,281
Other long-term investments		955		-
Total	$	10,718	$	9,347

XML



INCOME TAXES

9 Months Ended

Jun. 30, 2011

INCOME TAXES [Abstract]

INCOME TAXES

12. INCOME TAXES

Our effective income tax rate was 33.9% and 32.7% for the three and nine months ended June 30, 2011, respectively, compared to 35.1% and 35.2% for the three and nine months ended June 30, 2010.  The decrease in the effective tax rate during fiscal 2011 reflects the election that we made in the fourth quarter of fiscal 2010 to permanently reinvest the earnings of certain of our foreign subsidiaries outside of the U.S. rather than repatriate those earnings to the U.S., and the reinstatement of the U.S. research and experimentation tax credit in December 2010, which was retroactively effective as of January 1, 2010.  These decreases were partially offset by increased tax expense related to share-based compensation.  In addition, the effective tax rate for the nine months ended June 30, 2011 increased due to $671 in income tax expense related to certain compensation in fiscal 2008 through 2010 for which a previous tax benefit should not have been recorded, and the reversal of a $497 deferred tax asset related to certain share-based compensation expense, as discussed in Note 1 under the heading "Results of Operations".

XML



INVENTORIES

9 Months Ended

Jun. 30, 2011

INVENTORIES [Abstract]

INVENTORIES

3. INVENTORIES

Inventories consisted of the following:

	June 30,		September 30,
	2011		2010
Raw materials	$	25,750	$	23,542
Work in process		5,422		3,189
Finished goods		23,575		25,165
Total	$	54,747	$	51,896

The increase in inventory from September 30, 2010 was primarily due to the increased level of demand for our products during the first nine months of fiscal 2011.

XML



INVENTORIES (Details) (USD $) In Thousands	Jun. 30, 2011	Sep. 30, 2010
INVENTORIES [Abstract]
Raw materials	$ 25,750	$ 23,542
Work in process	5,422	3,189
Finished goods	23,575	25,165
Total	$ 54,747	$ 51,896

XML



SHARE-BASED COMPENSATION PLANS

9 Months Ended

Jun. 30, 2011

SHARE-BASED COMPENSATION PLANS [Abstract]

SHARE-BASED COMPENSATION PLANS

9. SHARE-BASED COMPENSATION PLANS

We currently issue share-based payments under the following programs: our Second Amended and Restated Cabot Microelectronics Corporation 2000 Equity Incentive Plan, as amended and restated September 23, 2008 ("2000 Equity Incentive Plan"); our Cabot Microelectronics Corporation 2007 Employee Stock Purchase Plan, as Amended and Restated January 1, 2010 (ESPP), and, pursuant to our 2000 Equity Incentive Plan, our Directors' Deferred Compensation Plan, as amended September 23, 2008, and our 2001 Executive Officer Deposit Share Program.  For additional information regarding these programs, refer to Note 12 of "Notes to the Consolidated Financial Statements" included in Item 8 of Part II of our annual report on Form 10-K for the fiscal year ended September 30, 2010.

We record share-based compensation expense for all share-based awards, including stock option grants, restricted stock and restricted stock unit awards and employee stock purchases.  We calculate share-based compensation expense using the straight-line approach based on awards ultimately expected to vest, which requires the use of an estimated forfeiture rate.  Our estimated forfeiture rate is primarily based on historical experience, but may be revised in future periods if actual forfeitures differ from the estimate.  We use the Black-Scholes model to estimate the grant date fair value of our stock options and employee stock purchases.  This model requires the input of highly subjective assumptions, including the price volatility of the underlying stock, the expected term of our stock options and the risk-free interest rate.  We estimate the expected volatility of our stock options based on a combination of our stock's historical volatility and the implied volatilities from actively-traded options on our stock.  We calculate the expected term of our stock options using the simplified method, due to our limited amount of historical option exercise data, and we add a slight premium to this expected term for employees who meet the definition of retirement eligible pursuant to their grants during the contractual term of the grant.  The simplified method uses an average of the vesting term and the contractual term of the option to calculate the expected term.  The risk-free rate is derived from the U.S. Treasury yield curve in effect at the time of grant.

Share-based compensation expense for the three and nine months ended June 30, 2011, and 2010, was as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Cost of goods sold	$	307	$	243	$	920	$	726
Research, development and technical		250		212		804		674
Selling and marketing		274		244		854		780
General and administrative		1,892		1,880		7,343		6,794
Total share-based compensation expense		2,723		2,579		9,921		8,974
Tax benefit		969		918		3,521		3,195
Total share-based compensation expense, net of tax	$	1,754	$	1,661	$	6,400	$	5,779

Our non-employee directors received their annual equity award in March 2011.  The award agreements provide for immediate vesting of the award at the time of termination of service for any reason other than by reason of Cause, Death, Disability or a Change in Control, as defined in the Cabot Microelectronics Corporation 2000 Equity Incentive Plan, if at such time the non-employee director has completed an equivalent of at least two full terms as a director of the Company, as defined in the Company's bylaws.  Five of the Company's non-employee directors had completed at least two full terms of service as of the date of the March 2011 award.  Consequently, the requisite service period for the award has already been satisfied and we recorded the fair value of $1,010 of the awards to these five directors to share-based compensation expense in the fiscal quarter ended March 31, 2011 rather than recording that expense over the one-year vesting period stated in the award agreement.

For additional information regarding the estimation of fair value, refer to Note 12 of "Notes to the Consolidated Financial Statements" included in Item 8 of Part II of our annual report on Form 10-K for the fiscal year ended September 30, 2010.

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FINANCIAL INFORMATION BY INDUSTRY SEGMENT AND PRODUCT LINE

9 Months Ended

Jun. 30, 2011

FINANCIAL INFORMATION BY INDUSTRY SEGMENT AND PRODUCT LINE [Abstract]

FINANCIAL INFORMATION BY INDUSTRY SEGMENT AND PRODUCT LINE

14. FINANCIAL INFORMATION BY INDUSTRY SEGMENT AND PRODUCT LINE

We operate predominantly in one industry segment - the development, manufacture, and sale of CMP consumables.

Revenue generated by product line for the three and nine months ended June 30, 2011, and 2010, was as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
Revenue:	2011		2010		2011		2010
Tungsten slurries	$	40,889	$	35,983	$	123,094	$	107,432
Dielectric slurries		30,998		30,529		91,926		85,787
Copper slurries		20,103		19,404		60,119		54,866
Polishing pads		7,561		7,818		23,650		21,673
Data storage slurries		6,863		4,796		20,948		15,906
Engineered Surface Finishes		5,432		3,125		15,974		12,219
Total revenue	$	111,846	$	101,655	$	335,711	$	297,883

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OTHER INCOME (EXPENSE), NET

9 Months Ended

Jun. 30, 2011

OTHER INCOME (EXPENSE), NET [Abstract]

OTHER INCOME (EXPENSE), NET

10. OTHER INCOME (EXPENSE), NET

Other income (expense) net, consisted of the following:

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
Interest income	$	53		$	68		$	194		$	150
Interest expense		(30	)		(53	)		(111	)		(184	)
Other income (expense)		(334	)		157			(683	)		(173	)
Total other income (expense), net	$	(311	)	$	172		$	(600	)	$	(207	)

The decrease in other income (expense) during the three and nine months ended June 30, 2011 from the comparable periods in fiscal 2010 was primarily due to foreign exchange effects on revenues and expenses, primarily related to changes in the exchange rate of the Japanese yen and the New Taiwan dollar to the U.S. dollar, net of the gains and losses incurred on forward foreign exchange contracts discussed in Note 7 of this Form 10-Q.

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FINANCIAL INFORMATION BY INDUSTRY SEGMENT AND PRODUCT LINE (Tables)

9 Months Ended

Jun. 30, 2011

FINANCIAL INFORMATION BY INDUSTRY SEGMENT AND PRODUCT LINE [Abstract]

Schedule of revenue by product line

Revenue generated by product line for the three and nine months ended June 30, 2011, and 2010, was as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
Revenue:	2011		2010		2011		2010
Tungsten slurries	$	40,889	$	35,983	$	123,094	$	107,432
Dielectric slurries		30,998		30,529		91,926		85,787
Copper slurries		20,103		19,404		60,119		54,866
Polishing pads		7,561		7,818		23,650		21,673
Data storage slurries		6,863		4,796		20,948		15,906
Engineered Surface Finishes		5,432		3,125		15,974		12,219
Total revenue	$	111,846	$	101,655	$	335,711	$	297,883

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CONTINGENCIES

9 Months Ended

Jun. 30, 2011

CONTINGENCIES [Abstract]

CONTINGENCIES

8. CONTINGENCIES

LEGAL PROCEEDINGS

While we are not involved in any legal proceedings that we believe will have a material impact on our consolidated financial position, results of operations or cash flows, we periodically become a party to legal proceedings in the ordinary course of business.  For example, in January 2007, we filed a legal action against DuPont Air Products NanoMaterials LLC (DA Nano), a CMP slurry competitor, in the United States District Court for the District of Arizona, charging that DA Nano's manufacturing and marketing of CMP slurries infringe certain CMP slurry patents that we own.  The affected DA Nano products include certain products used for tungsten CMP.  We filed our infringement complaint as a counterclaim in response to an action filed by DA Nano in the same court in December 2006 that sought declaratory relief and alleged non-infringement, invalidity and unenforceability regarding some of the patents at issue in our complaint against DA Nano.  DA Nano filed its complaint following our refusal of its request that we license to it our patents raised in its complaint.  DA Nano's complaint did not allege any infringement by our products of intellectual property owned by DA Nano.  From June 14 through July 8, 2010, a jury trial for the case was held.  All of Cabot Microelectronics' patents at issue in the case were found valid.  However, the jury found that DA Nano's products at issue do not infringe the asserted claims of these patents.  In November 2010, we filed a Notice of Appeal regarding infringement, which is still pending, and DA Nano filed a cross-appeal regarding validity.  However, DA Nano has since voluntarily dropped its cross-appeal, and our patents remain adjudicated as valid.  While the outcome of this and any legal matter cannot be predicted with certainty, we continue to believe that our claims in the pending action are meritorious, and we intend to continue to pursue them.

Refer to Note 17 of "Notes to the Consolidated Financial Statements" in Item 8 of Part II of our annual report on Form 10-K for the fiscal year ended September 30, 2010, for additional information regarding commitments and contingencies.

PRODUCT WARRANTIES

We maintain a warranty reserve that reflects management's best estimate of the cost to replace product that does not meet customers' specifications and performance requirements, and costs related to such replacement.  The warranty reserve is based upon a historical product replacement rate, adjusted for any specific known conditions or circumstances.  Additions and deductions to the warranty reserve are recorded in cost of goods sold.  Our warranty reserve requirements changed during the first nine months of fiscal 2011 as follows:

Balance as of September 30, 2010	$	375
Reserve for product warranty during the reporting period		814
Settlement of warranty		(832	)
Balance as of June 30, 2011	$	357

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BACKGROUND AND BASIS OF PRESENTATION

9 Months Ended

Jun. 30, 2011

BACKGROUND AND BASIS OF PRESENTATION [Abstract]

BACKGROUND AND BASIS OF PRESENTATION

1. BACKGROUND AND BASIS OF PRESENTATION

Cabot Microelectronics Corporation ("Cabot Microelectronics'', "the Company'', "us'', "we'' or "our'') supplies high-performance polishing slurries and pads used in the manufacture of advanced integrated circuit (IC) devices within the semiconductor industry, in a process called chemical mechanical planarization (CMP).  CMP polishes surfaces at an atomic level, thereby enabling IC device manufacturers to produce smaller, faster and more complex IC devices with fewer defects.  We develop, produce and sell CMP slurries for polishing many of the conducting and insulating materials used in IC devices, and also for polishing the disk substrates and magnetic heads used in hard disk drives.  We also develop, manufacture and sell CMP polishing pads, which are used in conjunction with slurries in the CMP process.  We also pursue other demanding surface modification applications through our Engineered Surface Finishes (ESF) business where we believe we can leverage our expertise in CMP consumables for the semiconductor industry to develop products for demanding polishing applications in other industries.  For additional information, refer to Part 1, Item 1, "Business", in our annual report on Form 10-K for the fiscal year ended September 30, 2010.

The unaudited consolidated financial statements have been prepared by Cabot Microelectronics Corporation pursuant to the rules of the Securities and Exchange Commission (SEC) and accounting principles generally accepted in the United States of America.  In the opinion of management, these unaudited consolidated financial statements include all normal recurring adjustments necessary for the fair presentation of Cabot Microelectronics' financial position as of June 30, 2011, cash flows for the nine months ended June 30, 2011, and June 30, 2010, and results of operations for the three and nine months ended June 30, 2011, and June 30, 2010.  The results of operations for the three and nine months ended June 30, 2011 may not be indicative of results to be expected for future periods, including the fiscal year ending September 30, 2011.  These unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes thereto included in Cabot Microelectronics' annual report on Form 10-K for the fiscal year ended September 30, 2010.

The consolidated financial statements include the accounts of Cabot Microelectronics and its subsidiaries.  All intercompany transactions and balances between the companies have been eliminated as of June 30, 2011.

Results of Operations

The results of operations for the nine months ended June 30, 2011 include certain adjustments to correct prior period amounts, which we have determined to be immaterial to the current period and the prior periods to which they relate.  An adjustment in the second quarter of fiscal 2011 reduced net income for the quarter by $671 and diluted earnings per share by approximately $0.03.  This adjustment related to income tax expense of $671 recorded for certain compensation in fiscal 2008 through 2010 for which a previous tax benefit should not have been recorded.  Adjustments in the first quarter of fiscal 2011 related to: (1) $1,474 ($1,014, net of tax) in employer-paid fringe benefits for required contributions to our 401(k) Plan, Supplemental Employee Retirement Plan, and non-United States statutory pension plans as a result of our annual payment pursuant to our fiscal 2010 annual incentive cash bonus program (AIP); (2) the reversal of a $497 deferred tax asset regarding certain share-based compensation expense which is not subject to such tax treatment; and (3) our under accrual of $290 ($199, net of tax) for payments made pursuant to the AIP as a result of the calculation of results against goals under the AIP.  Collectively, these adjustments reduced net income for the first nine months of fiscal 2011 by $2,381 and diluted earnings per share by approximately $0.10.

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GOODWILL AND OTHER INTANGIBLE ASSETS

9 Months Ended

Jun. 30, 2011

GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]

GOODWILL AND OTHER INTANGIBLE ASSETS

4. GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill was $43,080 as of June 30, 2011, and $40,436 as of September 30, 2010.  The increase in goodwill was due to foreign exchange fluctuations of the New Taiwan Dollar.

Goodwill and indefinite lived intangible assets are tested for impairment annually in the fourth quarter of the fiscal year or more frequently if indicators of potential impairment exist, using a fair-value-based approach.  The recoverability of goodwill is measured at the reporting unit level, which is defined as either an operating segment or one level below an operating segment.  We have consistently determined the fair value of our reporting units using a discounted cash flow analysis of our projected future results.  The recoverability of indefinite lived intangible assets is measured using the royalty savings method.  The use of discounted projected future results is based on assumptions that are consistent with our estimates of future growth within the strategic plan used to manage the underlying business.  Factors requiring significant judgment include assumptions related to future growth rates, discount factors, royalty rates and tax rates, among others.  Changes in economic and operating conditions that occur after the annual impairment analysis or an interim impairment analysis that impact these assumptions may result in future impairment charges.  We completed our annual impairment test during our fourth quarter of fiscal 2010 and concluded that no impairment existed.  There were no indicators of potential impairment during the quarter ended June 30, 2011, so we did not perform an impairment review for goodwill and indefinite lived intangible assets during the quarter.  There have been no cumulative impairment charges recorded on the goodwill of any of our reporting units.

The components of other intangible assets are as follows:

	June 30, 2011				September 30, 2010
	Gross Carrying		Accumulated		Gross Carrying		Accumulated
	Amount		Amortization		Amount		Amortization
Other intangible assets subject to amortization:
Product technology	$	8,430	$	3,707	$	8,206	$	2,926
Acquired patents and licenses		8,115		6,368		8,115		6,135
Trade secrets and know-how		2,550		2,550		2,550		2,550
Distribution rights, customer lists and other		12,738		4,546		11,939		3,300
Total other intangible assets subject to amortization		31,833		17,171		30,810		14,911
Total other intangible assets not subject to amortization*		1,190				1,190
Total other intangible assets	$	33,023	$	17,171	$	32,000	$	14,911

*       Total other intangible assets not subject to amortization consist primarily of trade names.

Amortization expense on our other intangible assets was $688 and $2,032 for the three and nine months ended June 30, 2011, respectively.  Amortization expense on our other intangible assets was $602 and $1,795 for the three and nine months ended June 30, 2010, respectively.  Estimated future amortization expense for the five succeeding fiscal years is as follows:

Fiscal Year	Estimated Amortization Expense
Remainder of 2011	$     688
2012	2,718
2013	2,551
2014	2,506
2015	2,465

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DERIVATIVE FINANCIAL INSTRUMENTS BY INCOME STATEMENT LOCATION (Details) (Foreign Exchange Contract [Member], Not Designated as Hedging Instrument [Member], Other income (expense), net [Member], USD $) In Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Other income (expense), net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange contracts, other income (expense), net	$ (186)	$ (511)	$ (248)	$ (41)

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EARNINGS PER SHARE (Tables)

9 Months Ended

Jun. 30, 2011

EARNINGS PER SHARE [Abstract]

Schedule of basic and diluted earnings per share

Basic and diluted earnings per share were calculated as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Numerator:
Earnings available to common shares	$	12,789	$	10,097	$	42,373	$	34,168
Denominator:
Weighted average common shares		23,118,698		23,142,793		22,931,178		23,178,257
(Denominator for basic calculation)
Weighted average effect of dilutive securities:
Share-based compensation		678,382		335,269		594,255		204,579
Diluted weighted average common shares		23,797,080		23,478,062		23,525,433		23,382,836
(Denominator for diluted calculation)
Earnings per share:
Basic	$	0.55	$	0.44	$	1.85	$	1.47
Diluted	$	0.54	$	0.43	$	1.80	$	1.46

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ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

9 Months Ended

Jun. 30, 2011

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES [Abstract]

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

6. ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

Accrued expenses and other current liabilities consisted of the following:

	June 30,		September 30,
	2011		2010
Accrued compensation	$	19,920	$	25,752
Goods and services received, not yet invoiced		4,954		4,359
Warranty accrual		357		375
Taxes, other than income taxes		1,004		1,162
Other		4,818		2,865
Total	$	31,053	$	34,513

The decrease in accrued compensation was primarily due to the payment of our AIP earned in fiscal 2010, partially offset by nine months of accrual under our AIP related to fiscal 2011.  The increase in other current liabilities was primarily due to the timing of customer advances and revenue not yet earned in our Engineered Surface Finishes business.

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SHARE-BASED COMPENSATION PLANS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation expense	$ 2,723		$ 2,579	$ 9,921	$ 8,974
Tax benefit	969		918	3,521	3,195
Total share-based compensation expense, net of tax	1,754		1,661	6,400	5,779
Number of completed, equivalent full terms as a non-employee director to qualify for immediate vesting of equity award		2
Number of non-employee directors that have completed two full terms		5
Non-employee director share-based compensation expense		1,010
Cost of Goods Sold [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation expense	307		243	920	726
Research, Development and Technical [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation expense	250		212	804	674
Selling and Marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation expense	274		244	854	780
General and Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation expense	$ 1,892		$ 1,880	$ 7,343	$ 6,794

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SHARE-BASED COMPENSATION PLANS (Tables)

9 Months Ended

Jun. 30, 2011

SHARE-BASED COMPENSATION PLANS [Abstract]

Schedule of share-based compensation expense

Share-based compensation expense for the three and nine months ended June 30, 2011, and 2010, was as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Cost of goods sold	$	307	$	243	$	920	$	726
Research, development and technical		250		212		804		674
Selling and marketing		274		244		854		780
General and administrative		1,892		1,880		7,343		6,794
Total share-based compensation expense		2,723		2,579		9,921		8,974
Tax benefit		969		918		3,521		3,195
Total share-based compensation expense, net of tax	$	1,754	$	1,661	$	6,400	$	5,779

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BACKGROUND AND BASIS OF PRESENTATION (Details) (USD $) In Thousands, except Per Share data	9 Months Ended
	Jun. 30, 2011
BACKGROUND AND BASIS OF PRESENTATION [Abstract]
Income tax expense recorded for certain compensation in fiscal 2008 through 2010 for which a previous tax benefit should not have been recorded	$ 671
Diluted earnings per share effect of income tax expense recorded for certain compensation in fiscal 2008 through 2010 for which a previous tax benefit should not have been recorded	$ 0.03
Adjustment to employer-paid fringe benefits for required contributions to various plans pursuant to the annual incentive cash bonus program (AIP)	1,474
Net of tax effect of adjustment to employer-paid fringe benefits for required contributions to various plans pursuant to the annual incentive cash bonus program (AIP)	1,014
Reversal of a deferred tax asset regarding certain share-based compensation expense	497
Under accrual for annual incentive cash bonus program (AIP)	290
Net of tax effect of under accrual for annual incentive cash bonus program (AIP)	199
Total of adjustments for the period	$ 2,381
Diluted per share effect of total adjustments for the period	$ 0.10

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CONTINGENCIES (Details) (USD $) In Thousands	9 Months Ended
	Jun. 30, 2011
CONTINGENCIES [Abstract]
Balance as of September 30, 2010	$ 375
Reserve for product warranty during the reporting period	814
Settlement of warranty	(832)
Balance as of June 30, 2011	$ 357

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COMPREHENSIVE INCOME (Tables)

9 Months Ended

Jun. 30, 2011

COMPREHENSIVE INCOME [Abstract]

Schedule of components comprising comprehensive income

The components of comprehensive income were as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Net income	$	12,789	$	10,097	$	42,373	$	34,168
Other comprehensive income:
Foreign currency translation adjustment		2,529		1,497		8,046		268
Minimum pension liability adjustment		5		6		15		19
Total comprehensive income	$	15,323	$	11,600	$	50,434	$	34,455

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EARNINGS PER SHARE

9 Months Ended

Jun. 30, 2011

EARNINGS PER SHARE [Abstract]

EARNINGS PER SHARE

13. EARNINGS PER SHARE

The standards of accounting for earnings per share require companies to provide a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations.  Basic and diluted earnings per share were calculated as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Numerator:
Earnings available to common shares	$	12,789	$	10,097	$	42,373	$	34,168
Denominator:
Weighted average common shares		23,118,698		23,142,793		22,931,178		23,178,257
(Denominator for basic calculation)
Weighted average effect of dilutive securities:
Share-based compensation		678,382		335,269		594,255		204,579
Diluted weighted average common shares		23,797,080		23,478,062		23,525,433		23,382,836
(Denominator for diluted calculation)
Earnings per share:
Basic	$	0.55	$	0.44	$	1.85	$	1.47
Diluted	$	0.54	$	0.43	$	1.80	$	1.46

For the three months ended June 30, 2011 and 2010, approximately 1.3 million and 2.6 million shares, respectively, attributable to outstanding stock options were excluded from the calculation of diluted earnings per share because the exercise price of the options was greater than the average market price of our common stock and, therefore, their inclusion would have been anti-dilutive.

For the nine months ended June 30, 2011 and 2010, approximately 1.3 million and 2.6 million shares, respectively, attributable to outstanding stock options were excluded from the calculation of diluted earnings per share because the exercise price of the options was greater than the average market price of our common stock and, therefore, their inclusion would have been anti-dilutive.

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OTHER LONG-TERM ASSETS

9 Months Ended

Jun. 30, 2011

OTHER LONG-TERM ASSETS [Abstract]

OTHER LONG-TERM ASSETS

5. OTHER LONG-TERM ASSETS

Other long-term assets consisted of the following:

	June 30,		September 30,
	2011		2010
Long-term ARS	$	8,041	$	8,066
Other long-term assets		1,722		1,281
Other long-term investments		955		-
Total	$	10,718	$	9,347

As discussed in Note 2 of this Form 10-Q, our two ARS that we owned as of June 30, 2011 are classified as long-term investments.  The securities are credit enhanced with bond insurance to a AA+ credit rating and all interest payments continue to be received on a timely basis.  Although we believe these securities will ultimately be collected in full, we believe that it is not likely that we will be able to monetize the securities in our next business cycle (which for us is generally one year).  We maintain a $234 pretax reduction ($151 net of tax) in fair value on one of the ARS that we had first recognized in fiscal 2008.  We assessed the impairment and determined that the impairment was temporary as it was related to the illiquid ARS market rather than credit risk.  In addition, we continue to believe this decline in fair value is temporary based on the nature of the underlying debt, the presence of bond insurance, our expectation that the issuer may refinance its debt, the fact that all interest payments have been received, our successful monetization of $25 of this ARS during the quarter ended March 31, 2011 and our intention not to sell the security nor be required to sell the security until the value recovers, which may be at maturity, given our current cash position, our expected future cash flow, and our unused debt capacity.

As discussed in Note 2 of this Form 10-Q, we recorded a long-term asset and a corresponding long-term liability of $955 representing the fair value of our SERP investments as of June 30, 2011.

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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Jun. 30, 2011

FAIR VALUE OF FINANCIAL INSTRUMENTS [Abstract]

Schedule of fair value of financial instruments

The following table presents assets that we measured at fair value on a recurring basis at June 30, 2011 and September 30, 2010.  As permitted under the relevant standards, we have chosen to not measure any of our current liabilities at fair value as we believe our current liabilities approximate their fair value due to their short-term, highly liquid characteristics.  We have classified the following assets in accordance with the fair value hierarchy set forth in the applicable standards.  In instances where the inputs used to measure the fair value of an asset fall into more than one level of the hierarchy, we have classified them based on the lowest level input that is significant to the determination of the fair value.

June 30, 2011	Level 1		Level 2		Level 3		Total Fair Value
Cash and cash equivalents	$	292,939	$	-	$	-	$	292,939
Auction rate securities (ARS)		-		-		8,041		8,041
Other long-term investments		955		-		-		955
Total	$	293,894	$	-	$	8,041	$	301,935

September 30, 2010	Level 1		Level 2		Level 3		Total Fair Value
Cash and cash equivalents	$	254,164	$	-	$	-	$	254,164
Auction rate securities (ARS)		-		-		8,066		8,066
Other long-term investments		-		-		-		-
Total	$	254,164	$	-	$	8,066	$	262,230

Schedule of auction rate securities (ARS) activity

The following table presents a reconciliation of the activity in fiscal 2011 for fair value measurements using level 3 inputs:

Balance as of September 30, 2010	$	8,066
Net sales of ARS		(25	)
Balance as of June 30, 2011	$	8,041

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DERIVATIVE FINANCIAL INSTRUMENTS (Details) (Foreign Exchange Contract [Member], Not Designated as Hedging Instrument [Member], USD $) In Thousands	Jun. 30, 2011	Sep. 30, 2010
Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of foreign exchange contract asset derivatives	$ 6	$ 5
Fair value of foreign exchange contract liability derivatives	0	0
Accrued expenses and other current liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of foreign exchange contract asset derivatives	0	0
Fair value of foreign exchange contract liability derivatives	$ 0	$ 0

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OTHER INCOME (EXPENSE), NET (Tables)

9 Months Ended

Jun. 30, 2011

OTHER INCOME (EXPENSE), NET [Abstract]

Schedule of other income (expense) net

Other income (expense) net, consisted of the following:

	Three Months Ended						Nine Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
Interest income	$	53		$	68		$	194		$	150
Interest expense		(30	)		(53	)		(111	)		(184	)
Other income (expense)		(334	)		157			(683	)		(173	)
Total other income (expense), net	$	(311	)	$	172		$	(600	)	$	(207	)

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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 42,373	$ 34,168
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	17,968	18,839
Provision for doubtful accounts	11	(109)
Share-based compensation expense	9,921	8,974
Deferred income tax expense (benefit)	8,713	(2,425)
Non-cash foreign exchange (gain) loss	(459)	344
Loss on disposal of property, plant and equipment	38	69
Other	(1,075)	(87)
Changes in operating assets and liabilities:
Accounts receivable	1,515	(1,782)
Inventories	(1,899)	(5,331)
Prepaid expenses and other assets	(10,264)	(2,458)
Accounts payable	(3,898)	3,936
Accrued expenses, income taxes payable and other liabilities	(3,298)	13,117
Net cash provided by operating activities	59,646	67,255
Cash flows from investing activities:
Additions to property, plant and equipment	(18,369)	(8,179)
Proceeds from sales of property, plant and equipment	1	2
Purchase of patents	0	(115)
Proceeds from the sale of investments	25	50
Net cash used in investing activities	(18,343)	(8,242)
Cash flows from financing activities:
Repurchases of common stock	(41,387)	(10,764)
Net proceeds from issuance of stock	37,224	2,639
Tax benefits associated with share-based compensation expense	967	0
Principal payments under capital lease obligations	(964)	(900)
Net cash used in financing activities	(4,160)	(9,025)
Effect of exchange rate changes on cash	1,632	129
Increase in cash and cash equivalents	38,775	50,117
Cash and cash equivalents at beginning of period	254,164	199,952
Cash and cash equivalents at end of period	292,939	250,069
Supplemental disclosure of non-cash investing and financing activities:
Purchases of property, plant and equipment in accrued liabilities and accounts payable at the end of the period	5,331	941
Issuance of restricted stock	$ 6,693	$ 4,985

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INVENTORIES (Tables)

9 Months Ended

Jun. 30, 2011

INVENTORIES [Abstract]

Schedule of inventories

Inventories consisted of the following:

	June 30,		September 30,
	2011		2010
Raw materials	$	25,750	$	23,542
Work in process		5,422		3,189
Finished goods		23,575		25,165
Total	$	54,747	$	51,896

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COMPREHENSIVE INCOME (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
COMPREHENSIVE INCOME Details [Abstract]
Net income	$ 12,789	$ 10,097	$ 42,373	$ 34,168
Other comprehensive income:
Foreign currency translation adjustment	2,529	1,497	8,046	268
Minimum pension liability adjustment	5	6	15	19
Total comprehensive income	$ 15,323	$ 11,600	$ 50,434	$ 34,455

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ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables)

9 Months Ended

Jun. 30, 2011

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES [Abstract]

Schedule of accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of the following:

	June 30,		September 30,
	2011		2010
Accrued compensation	$	19,920	$	25,752
Goods and services received, not yet invoiced		4,954		4,359
Warranty accrual		357		375
Taxes, other than income taxes		1,004		1,162
Other		4,818		2,865
Total	$	31,053	$	34,513

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FAIR VALUE OF FINANCIAL INSTRUMENTS

9 Months Ended

Jun. 30, 2011

FAIR VALUE OF FINANCIAL INSTRUMENTS [Abstract]

FAIR VALUE OF FINANCIAL INSTRUMENTS

2. FAIR VALUE OF FINANCIAL INSTRUMENTS

On October 1, 2009, we adopted the accounting provisions that relate to the fair value of non-financial assets and non-financial liabilities.  We did not elect the fair value option for any non-financial assets or non-financial liabilities that were not previously required to be measured at fair value under other generally accepted accounting principles.  The adoption of these provisions did not have a material impact on our results of operations, financial position or cash flows.

Fair value is defined as the price that would be received from the sale of an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.  The FASB established a three-level hierarchy for disclosure based on the extent and level of judgment used to estimate fair value.  Level 1 inputs consist of valuations based on quoted market prices in active markets for identical assets or liabilities.  Level 2 inputs consist of valuations based on quoted prices for similar assets or liabilities, quoted prices for identical assets or liabilities in an inactive market, or other observable inputs.  Level 3 inputs consist of valuations based on unobservable inputs that are supported by little or no market activity.

The following table presents assets that we measured at fair value on a recurring basis at June 30, 2011 and September 30, 2010.  As permitted under the relevant standards, we have chosen to not measure any of our current liabilities at fair value as we believe our current liabilities approximate their fair value due to their short-term, highly liquid characteristics.  We have classified the following assets in accordance with the fair value hierarchy set forth in the applicable standards.  In instances where the inputs used to measure the fair value of an asset fall into more than one level of the hierarchy, we have classified them based on the lowest level input that is significant to the determination of the fair value.

June 30, 2011	Level 1		Level 2		Level 3		Total Fair Value
Cash and cash equivalents	$	292,939	$	-	$	-	$	292,939
Auction rate securities (ARS)		-		-		8,041		8,041
Other long-term investments		955		-		-		955
Total	$	293,894	$	-	$	8,041	$	301,935

September 30, 2010	Level 1		Level 2		Level 3		Total Fair Value
Cash and cash equivalents	$	254,164	$	-	$	-	$	254,164
Auction rate securities (ARS)		-		-		8,066		8,066
Other long-term investments		-		-		-		-
Total	$	254,164	$	-	$	8,066	$	262,230

Our cash and cash equivalents consist of various bank accounts used to support our operations and investments in institutional money-market funds which are traded in active markets.  The fair value of our long-term ARS is determined through two discounted cash flow analyses, one using a discount rate based on a market index comprised of tax exempt variable rate demand obligations and one using a discount rate based on the LIBOR swap curve, adding a risk factor to reflect current liquidity issues in the ARS market.  Our other long-term investments represent the fair value of investments under the Cabot Microelectronics Supplemental Employee Retirement Plan (SERP), which is a nonqualified supplemental savings plan.  The fair value of the investments is determined through quoted market prices within actively traded markets.  Although the investments are allocated to individual participants and investment decisions are made solely by those participants, the SERP has been deemed a nonqualified plan.  Consequently, the Company owns the assets and the related liability for disbursement until such time a participant makes a qualifying withdrawal, and should have recorded the assets and liability in our Consolidated Balance Sheet in prior periods.  As a result, during the quarter ended March 31, 2011, we established a long-term asset of $952 representing the fair value of SERP investments held at March 31 and a corresponding liability of $952 in other long-term liabilities on our Consolidated Balance Sheet.  The long-term asset and long-term liability were adjusted to $955 in the third quarter of fiscal 2011 to reflect their fair value as of June 30, 2011.

We applied accounting standards regarding the classification and valuation of financial instruments to the valuation of our investment in ARS at June 30, 2011.  Our ARS investments at June 30, 2011 consisted of two tax exempt municipal debt securities with a total par value of $8,275.  The ARS market began to experience illiquidity in early 2008, and this illiquidity continues.  Despite this lack of liquidity, there have been no defaults of the underlying securities and interest income on these holdings continues to be received on scheduled interest payment dates.  Our ARS, when purchased, were generally issued by A-rated municipalities.  Although the credit ratings of both municipalities have been downgraded since our original investment, the ARS are credit enhanced with bond insurance and currently carry a credit rating of AA+ by Standard and Poors.

Since an active market for ARS does not currently exist, we determine the fair value of these investments using a Level 3 discounted cash flow analysis and also consider other factors such as the reduced liquidity in the ARS market and nature of the insurance backing.  Key inputs to our discounted cash flow model include projected cash flows from interest and principal payments and the weighted probabilities of improved liquidity or debt refinancing by the issuer.  We also incorporate certain Level 2 market indices into the discounted cash flow analysis, including published rates such as the LIBOR rate, the LIBOR swap curve and a municipal swap index published by the Securities Industry and Financial Markets Association.  The following table presents a reconciliation of the activity in fiscal 2011 for fair value measurements using level 3 inputs:

Balance as of September 30, 2010	$	8,066
Net sales of ARS		(25	)
Balance as of June 30, 2011	$	8,041

Based on our fair value assessment, we determined that one ARS continues to be impaired as of June 30, 2011.  This security has a fair value of $3,091 (par value $3,325).  We assessed the impairment in accordance with the applicable standards and determined that the impairment was due to the lack of liquidity in the ARS market rather than to credit risk.  We have maintained the $234 temporary impairment that we previously recorded.  We believe that this ARS is not permanently impaired because in the event of default by the issuer, we expect the insurance provider would pay interest and principal following the original repayment schedule, we successfully monetized at par value $25 of this security during our fiscal quarter ended March 31, 2011 and we do not intend to sell the security nor do we believe we will be required to sell the security before the value recovers, which may be at maturity.  We determined that the fair value of the other ARS was not impaired as of June 30, 2011.  See Note 5 for more information on these investments.

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COMPREHENSIVE INCOME

9 Months Ended

Jun. 30, 2011

COMPREHENSIVE INCOME [Abstract]

COMPREHENSIVE INCOME

11. COMPREHENSIVE INCOME

The components of comprehensive income were as follows:

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Net income	$	12,789	$	10,097	$	42,373	$	34,168
Other comprehensive income:
Foreign currency translation adjustment		2,529		1,497		8,046		268
Minimum pension liability adjustment		5		6		15		19
Total comprehensive income	$	15,323	$	11,600	$	50,434	$	34,455

The foreign currency translation adjustments during the three and nine months ended June 30, 2011 and 2010 primarily resulted from the changes in the exchange rates of the U.S. dollar relative to the Japanese yen and the New Taiwan dollar.

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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Mar. 31, 2011	Jun. 30, 2011	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member]	Sep. 30, 2010 Fair Value, Measurements, Recurring [Member]	Jun. 30, 2011 Level 1 [Member]	Sep. 30, 2010 Level 1 [Member]	Jun. 30, 2011 Level 2 [Member]	Sep. 30, 2010 Level 2 [Member]	Jun. 30, 2011 Level 3 [Member]	Sep. 30, 2010 Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents			$ 292,939	$ 254,164	$ 292,939	$ 254,164	$ 0	$ 0	$ 0	$ 0
Auction rate securities (ARS)			8,041	8,066	0	0	0	0	8,041	8,066
Other long-term investments			955	0	955	0	0	0	0	0
Total			301,935	262,230	293,894	254,164	0	0	8,041	8,066
Other long-term investment, Supplemental Employee Retirement Plan (SERP)	952
Corresponding SERP liability	952
Beginning balance		8,066
Net sales of ARS		(25)
Ending balance		8,041
Auction rate securities (ARS) par value		8,275
Number of impaired auction rate securities (ARS)		1
Fair value of impaired security		3,091
Par value of impaired security		3,325
Impairment amount of impaired security		234
Monetized par value of impaired security	$ 25

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NEW ACCOUNTING PRONOUNCEMENTS

9 Months Ended

Jun. 30, 2011

NEW ACCOUNTING PRONOUNCEMENTS [Abstract]

NEW ACCOUNTING PRONOUNCEMENTS

15. NEW ACCOUNTING PRONOUNCEMENTS

In October 2010, we adopted new accounting standards regarding the recognition of a controlling financial interest in a variable interest entity (VIE).  The primary beneficiary of a VIE is defined as the enterprise that has both: 1) the power to direct the activities of a VIE that most significantly impact the entity's economic performance; and 2) the obligation to absorb losses of the entity that could potentially be significant to the VIE or the right to receive benefits from the entity that could potentially be significant to the VIE.  The new standards also require ongoing reassessments of whether an enterprise is the primary beneficiary of a VIE.  The adoption of these new standards did not have any impact on our results of operations, financial position or cash flows as we do not currently have any interest or arrangements that are considered variable interest entities.

In October 2010, we adopted new accounting standards regarding the recognition of revenue for multiple deliverable revenue arrangements.  The new standards modify the fair value requirements regarding the recognition of revenue under multiple deliverable arrangements by allowing the use of the best estimate of selling price in addition to vendor-specific objective evidence (VSOE) and third-party evidence (TPE) for determining the selling price of a deliverable.  A vendor is now required to use its best estimate of the selling price when VSOE or TPE of the selling price cannot be determined.  In addition, the residual method of allocating arrangement consideration is no longer permitted.  The adoption of these new standards did not have a material effect on our results of operations, financial position or cash flows.

In October 2010, we adopted new accounting standards regarding revenue arrangements that include software elements.  The guidance in these new standards modifies the existing accounting rules regarding the recognition of revenue from the sale of software to exclude: (a) non-software components of tangible products; and (b) software components of tangible products that are sold, licensed or leased with tangible products when the software components and non-software components of the tangible product function together to deliver the tangible product's essential functionality.  The adoption of these new standards did not have a material effect on our results of operations, financial position or cash flows.

In January 2010, the FASB issued ASU No. 2010-06, "Fair Value Measurements and Disclosures (Topic 820) - Improving Disclosures about Fair Value Measurements" (ASU 2010-06).  ASU 2010-06 provides amendments to the rules regarding the disclosure of fair value measurements and clarifies the language in certain existing disclosures.  New disclosures include a discussion of the transfers in and out of Level 1 and 2 measurements as well as a reconciliation of gross activity for Level 3 measurements.  ASU 2010-06 clarifies the disclosures an entity must make regarding inputs and valuation techniques used in fair value measurements.  The ASU also clarifies that an entity should provide fair value disclosures for each class of assets and liabilities.  ASU 2010-06 is effective for interim and annual reporting periods beginning after December 15, 2009, except for the disclosures about the reconciliation of Level 3 measurements which are effective for fiscal years beginning after December 15, 2010.  The adoption of the provisions relating to Level 1 and Level 2 measurements did not have a material impact on our results of operations, financial position or cash flows.  Based on our current Level 3 fair value measurements, we believe the adoption of the provisions related to Level 3 measurements will not have a material impact on the disclosures in our financial statements.

In May 2011, the FASB issued ASU No. 2011-04, "Fair Value Measurement (Topic 820) - Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs" (ASU 2011-04).  The amendments in ASU 2011-04 change some of the wording used to describe certain U.S. GAAP requirements for measuring fair value and disclosing information about fair value measurements.  Some of the amendments clarify the FASB's intent about the application of existing fair value measurement requirements and other amendments change a particular principle or requirement for measuring fair value or for disclosing information about fair value measurements.  ASU 2011-04 is effective for interim and annual periods beginning after December 15, 2011.  We believe that the adoption of ASU 2011-04 will not have a material impact on the fair value measurements and their related disclosures in our financial statements.

In June 2011, the FASB issued ASU No. 2011-05, "Comprehensive Income (Topic 220) - Presentation of Comprehensive Income" (ASU 2011-05).  The provisions of ASU 2011-05 require an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements.  If two separate statements are presented, the statement of other comprehensive income should immediately follow the statement of net income.  ASU 2011-05 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011.  Early adoption of these provisions is permitted and will be applied retrospectively.  The adoption of ASU 2011-05 will change the way we present comprehensive income as current U.S. GAAP permits an annual presentation of comprehensive income within the statement of equity and quarterly presentation of comprehensive income within the footnotes to the financial statements.  We expect to present comprehensive income in a separate statement immediately following the statement of net income beginning in our fiscal quarter ending March 31, 2012.

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CONSOLIDATED STATEMENTS OF INCOME (LOSS) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
CONSOLIDATED STATEMENTS OF INCOME (LOSS) [Abstract]
Revenue	$ 111,846	$ 101,655	$ 335,711	$ 297,883
Cost of goods sold	58,821	51,759	172,522	148,114
Gross profit	53,025	49,896	163,189	149,769
Operating expenses:
Research, development and technical	14,573	12,875	43,348	38,364
Selling and marketing	7,785	7,009	22,056	19,861
General and administrative	11,008	14,637	34,251	38,581
Total operating expenses	33,366	34,521	99,655	96,806
Operating income	19,659	15,375	63,534	52,963
Other income (expense), net	(311)	172	(600)	(207)
Income before income taxes	19,348	15,547	62,934	52,756
Provision for income taxes	6,559	5,450	20,561	18,588
Net income	$ 12,789	$ 10,097	$ 42,373	$ 34,168
Basic earnings per share	$ 0.55	$ 0.44	$ 1.85	$ 1.47
Weighted average basic shares outstanding	23,119	23,143	22,931	23,178
Diluted earnings per share	$ 0.54	$ 0.43	$ 1.80	$ 1.46
Weighted average diluted shares outstanding	23,797	23,478	23,525	23,383

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GOODWILL AND OTHER INTANGIBLE ASSETS (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Sep. 30, 2010
GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]
Goodwill	$ 43,080		$ 43,080		$ 40,436
Schedule of Finite-Lived Intangible Assets and Infinite-Lived Intangible Assets by Major Class [Line Items]
Other intangible assets amortization expense	688	602	2,032	1,795
Fiscal Year [Abstract]
Remainder of 2011			688
2012			2,718
2013			2,551
2014			2,506
2015			2,465
Trade Secrets and Know-How [Member]
Schedule of Finite-Lived Intangible Assets and Infinite-Lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	2,550		2,550		2,550
Accumulated Amortization	2,550		2,550		2,550
Product Technology [Member]
Schedule of Finite-Lived Intangible Assets and Infinite-Lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	8,430		8,430		8,206
Accumulated Amortization	3,707		3,707		2,926
Distribution Rights, Customer Lists and Other [Member]
Schedule of Finite-Lived Intangible Assets and Infinite-Lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	12,738		12,738		11,939
Accumulated Amortization	4,546		4,546		3,300
Acquired Patents and Licenses [Member]
Schedule of Finite-Lived Intangible Assets and Infinite-Lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	8,115		8,115		8,115
Accumulated Amortization	6,368		6,368		6,135
Other Intangible Assets Subject to Amortization [Member]
Schedule of Finite-Lived Intangible Assets and Infinite-Lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	31,833		31,833		30,810
Accumulated Amortization	17,171		17,171		14,911
Other Intangible Assets [Member]
Schedule of Finite-Lived Intangible Assets and Infinite-Lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	33,023		33,023		32,000
Accumulated Amortization	17,171		17,171		14,911
Other Intangible Assets Not Subject to Amortization [Member]
Schedule of Finite-Lived Intangible Assets and Infinite-Lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	$ 1,190		$ 1,190		$ 1,190

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INCOME TAXES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
INCOME TAXES [Abstract]
Effective income tax rate	33.90%	35.10%	32.70%	35.20%
Income tax expense related to certain compensation			$ 671
Reversal of a deferred tax asset related to certain share-based compensation expense	$ 497		$ 497

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EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Numerator:
Earnings available to common shares	$ 12,789	$ 10,097	$ 42,373	$ 34,168
Denominator:
Weighted average common shares (Denominator for basic calculation)	23,119,000	23,143,000	22,931,000	23,178,000
Weighted average effect of dilutive securities:
Share-based compensation	678,000	335,000	594,000	205,000
Diluted weighted average common shares (Denominator for diluted calculation)	23,797,000	23,478,000	23,525,000	23,383,000
Earnings per share:
Basic	$ 0.55	$ 0.44	$ 1.85	$ 1.47
Diluted	$ 0.54	$ 0.43	$ 1.80	$ 1.46
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding stock options excluded from diluted earnings	1,300,000	2,600,000	1,300,000	2,600,000

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ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) (USD $) In Thousands	Jun. 30, 2011	Sep. 30, 2010
ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES [Abstract]
Accrued compensation	$ 19,920	$ 25,752
Goods and services received, not yet invoiced	4,954	4,359
Warranty accrual	357	375
Taxes, other than income taxes	1,004	1,162
Other	4,818	2,865
Total	$ 31,053	$ 34,513