8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported):

October 17, 2008

Cabot Microelectronics Corporation

(Exact name of registrant as specified in its charter)

Delaware	000-30205	36-4324765
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification)

870 Commons Drive, Aurora, Illinois	60504
(Address of principal executive offices)	(Zip Code)

(630) 375-6631

(Registrant’s telephone number, including area code)

Not applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o   Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o   Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o   Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o   Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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Item 7.01                      Regulation FD Disclosure.

On October 17, 2008, Cabot Microelectronics Corporation issued a press release entitled “Cabot Microelectronics Celebrates the Grand Opening of Its Global Pads Manufacturing Center,” a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference.

This information is being furnished pursuant to Item 7.01 of Form 8-K and shall not be deemed “filed” for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01                      Financial Statements and Exhibits.

(c)	Exhibits
	The following exhibit is being furnished, not filed, herewith pursuant to  Item 7.01 of Form 8-K:
	99.1           Press release, dated October 17, 2008, entitled “Cabot Microelectronics Celebrates the Grand Opening of Its Global Pads Manufacturing Center.”

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SIGNATURE

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 hereunto duly authorized.

	CABOT MICROELECTRONICS CORPORATION
Date: October 17, 2008	By:	/s/ WILLIAM S. JOHNSON
		William S. Johnson
		Vice President and Chief Financial Officer
		[Principal Financial Officer]

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INDEX TO EXHIBITS

Exhibit Number	Title
99.1	Press release, dated October 17, 2008, entitled “Cabot Microelectronics Celebrates the Grand Opening of Its Global Pads Manufacturing Center.”

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EX-99.1

EXHIBIT 99.1

PRESS RELEASE

       Contact:

       Amy Ford

       Director of Investor Relations

       Cabot Microelectronics Corporation

                 (630) 499-2600

CABOT MICROELECTRONICS CELEBRATES THE

GRAND OPENING OF ITS GLOBAL PADS MANUFACTURING CENTER

AURORA, IL, October 17, 2008 – Cabot Microelectronics Corporation (Nasdaq:  CCMP), the world’s leading supplier of chemical mechanical planarization (CMP) polishing slurries to the semiconductor industry, today celebrated the grand opening of its global pads manufacturing facility in Aurora, Illinois.  Company management and employees were joined at the ceremony by the Mayor of Aurora and other local officials to commemorate this historic event for the company.

Cabot Microelectronics offers its Epic D100 polishing pad line, which complements the company’s CMP slurry product offerings.  The company’s polishing pads business has grown from less than $1 million in revenue for fiscal 2007 to approximately $15 million in revenue for fiscal 2008, which ended September 30.  Rapid growth in the pads business has led to the investment in the company’s Aurora facility, the creation of 90 new jobs at the company within the local community, and the generation of increased business for Illinois and United States suppliers.

“I am very proud of the success we have had in our emerging polishing pads business, in terms of customer adoptions of our innovative product, which has driven the capacity expansion that we are celebrating today,” said William Noglows, Chairman and CEO of Cabot Microelectronics. “We have had a strong relationship with the City of Aurora, where our company began, and are delighted with the hospitable climate here for business investment.”

ABOUT CABOT MICROELECTRONICS CORPORATION

Cabot Microelectronics Corporation, headquartered in Aurora, Illinois, is the world's leading supplier of CMP slurries used in semiconductor and data storage manufacturing. The company's CMP slurry and pad products play a critical role in the production of the most advanced semiconductor devices, enabling the manufacture of smaller, faster and more complex devices by its customers.  Since becoming an independent public company in 2000, the company has grown to approximately 800 employees on a global basis.  The company is also leveraging its expertise in CMP slurry formulation, materials and polishing techniques developed for the semiconductor industry and applying it to demanding surface modification applications where shaping, enabling and enhancing the performance of surfaces is critical to success. For more information about Cabot Microelectronics Corporation, visit www.cabotcmp.com or contact Amy Ford, Director of Investor Relations at (630) 499-2600.

SAFE HARBOR STATEMENT

This news release may include statements that constitute "forward looking statements" within the meaning of federal securities regulations.  These forward-looking statements include statements related to: future sales and operating results; company and industry growth or trends; growth of the markets in which the company participates; international events or various macroeconomic 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; the acquisition of or investment in other entities; uses and investment of the company’s cash balance; and the construction of facilities by Cabot Microelectronics Corporation.  These forward-looking statements involve a number of risks, uncertainties, and other factors, including those described from time to time in Cabot Microelectronics' filings with the Securities and Exchange Commission (SEC), that could cause actual results to differ materially from those described by these forward-looking statements.  In particular, see "Risk Factors" in the company’s quarterly report on Form 10-Q for the quarter ended June 30, 2008 and in the company’s annual report on Form 10-K for the fiscal year ended September 30, 2007, both filed with the SEC.  Cabot Microelectronics assumes no obligation to update this forward-looking information.