Exhibit 99.1

News Release

Amkor Technology Reports Financial Results for the Fourth Quarter and Full Year 2010

Fourth Quarter 2010

• Net sales $751 million

• Gross margin 21%

• Net income $51 million

• Earnings per diluted share $0.20

Full Year 2010

• Net sales $2.94 billion

• Gross margin 23%

• Net income $232 million

• Earnings per diluted share $0.91

CHANDLER, Ariz. — February 9, 2011 — Amkor Technology, Inc. (NASDAQ: AMKR), a leading provider of semiconductor assembly and test services, today announced financial results for the fourth quarter ended December 31, 2010, with net sales of $751 million, net income of $51 million, and earnings per diluted share of $0.20. For the full year 2010, Amkor reported net sales of $2.94 billion, net income of $232 million, and earnings per diluted share of $0.91.

“We delivered record net sales and net income for the full year 2010,” said Ken Joyce, Amkor’s president and chief executive officer. “Strong demand across all of our package families and end markets, particularly in our core markets for wireless communications, gaming and other consumer electronics, drove net sales growth of 35% and a 49% increase in net income. We also reduced our net debt by $79 million and delivered a 24% return on invested capital.”

“During the fourth quarter we saw solid growth in communications, a seasonal decline in gaming and inventory adjustments by some of our customers in the consumer electronics and networking areas,” said Joyce. “The lower business volumes in the quarter, along with unfavorable foreign currency exchange rate movements, reduced our gross margin from the prior quarter.”

Selected financial information for the fourth quarter 2010 is as follows:

• Net Sales: $751 million, down 5% from $794 million in the prior quarter, and up 12% from $668 million in the fourth quarter of 2009

• Gross Margin: 21%, compared to 24% in the prior quarter and 26% in the fourth quarter of 2009

• Net Income: $51 million, down from $78 million in the prior quarter, and down from $88 million in the fourth quarter of 2009

• Earnings Per Diluted Share: $0.20, down from $0.30 in the prior quarter, and down from $0.33 in the fourth quarter of 2009

Selected financial information for the full year 2010 is as follows:

• Net Sales: $2.94 billion, up 35% from $2.18 billion in 2009

• Gross Margin: 23%, compared to 22% in 2009

• Net Income: $232 million, up 49% from $156 million in 2009

• Earnings Per Diluted Share: $0.91, up from $0.67 in 2009

“Our fourth quarter earnings per diluted share were adversely impacted by approximately $0.04 as a result of unfavorable foreign currency exchange rate movements and $0.02 for an unanticipated reserve for foreign taxes,” said Joanne Solomon, Amkor’s executive vice president and chief financial officer. “Capital additions were $103 million during the fourth quarter, primarily in support of solid demand for wireless communications.”

Cash and cash equivalents were $405 million, and net debt was $959 million, at December 31, 2010. In January 2011, the company redeemed all $100 million of its 6.25% Convertible Subordinated Notes due 2013. The Notes were converted into 13.4 million shares of Amkor Common Stock and no cash was used for the redemption. As a consequence of this conversion, net debt would have been $859 million.

Selected operating data for the fourth quarter and full year 2010 are included in a section before the financial statements.

Business Outlook

“Looking ahead to the first quarter of 2011, our strong position in gaming is amplifying typical seasonal patterns and we see some carryover of the inventory adjustments that began in the fourth quarter,” said Joyce. “The corresponding decline in utilization is expected to compress our gross margin in the first quarter.”

“As we exit the first quarter, we are anticipating a rebound in customer demand and a year of solid growth driven primarily by strength in wireless communications and consumer electronics,” continued Joyce. “To meet the capacity requirements of our leading customers, we are currently planning capital additions of approximately $500 million for 2011, with spending weighted in the first half of the year to take advantage of the growth opportunities we see in the second quarter and the balance of the year.”

Based upon the currently available information, we have the following expectations for the first quarter of 2011:

• Net sales of $660 million to $690 million, down 8% to down 12% from the prior quarter

• Gross margin between 16% and 19%

• Net income of $10 million to $35 million, or $0.05 to $0.14 per diluted share

• Capital additions of approximately $135 million for the first quarter, and capital additions of approximately $500 million for the full year

Conference Call Information

Amkor will conduct a conference call on February 9, 2011, at 5:00 p.m. Eastern Daylight Time. This call is being webcast and can be accessed at Amkor’s web site: www.amkor.com. You may also access the call by dialing 877-941-1465. A replay of the call will be made available at Amkor’s web site or by dialing 800-406-7325 (access pass code #4406938). The webcast is also being distributed over Thomson Reuters’ Investor Distribution Network to both institutional and individual investors. Individual investors can listen to the call through Thomson Reuters’ individual investor center at www.companyboardroom.com or by visiting any of the investor sites in Thomson Reuters’ Individual Investor Network. Institutional investors can access the call via Thomson Reuters’ password-protected event management site, Street Events (www.streetevents.com).

About Amkor

Amkor is a leading provider of semiconductor assembly and test services to semiconductor companies and electronics OEMs. More information on Amkor is available from the company’s SEC filings and on Amkor’s website: www.amkor.com.

Forward-Looking Statement Disclaimer

This press release contains forward-looking statements within the meaning of federal securities laws. All statements other than statements of historical fact are considered forward-looking statements including, without limitation, the following statements made regarding: our position in gaming and its impact on our typical seasonal patterns, some carryover of inventory adjustments into the first quarter, a decline in utilization and its expected impact on our gross margin in the first quarter, the anticipated rebound in customer demand and year of solid growth, expected strength in wireless communications and consumer electronics, the amount and timing of our capital additions in 2011, growth opportunities in the second quarter and the balance of the year, and our current business outlook for the first quarter of 2011, including our expected net sales, gross margin, net income, earnings per diluted share and capital additions. These forward-looking statements involve a number of risks, uncertainties, assumptions and other factors that could affect future results and cause actual results and events to differ materially from historical and expected results and those expressed or implied in the forward-looking statements, including, but not limited to, the following:

• the highly unpredictable nature of the semiconductor industry;

• the effect of the global economy on credit markets, financial institutions, customers, suppliers and consumers;

• inability to achieve high capacity utilization rates;

• volatility of consumer demand for products incorporating our semiconductor packages;

• dependence on key customers;

• weakness in the forecasts of our customers;

• customer modification of and follow through with respect to forecasts provided to us;

• changes in tax rates and taxes as a result of changes in tax law, the jurisdictions in which our income is determined to be earned and taxed, the outcome of tax audits and tax ruling requests, our ability to realize deferred tax assets and the expiration of tax holidays;

• curtailment of outsourcing by our customers;

• our substantial indebtedness and restrictive covenants;

• failure to realize sufficient cash flow to fund capital additions;

• the effects of a recession or other downturn in the U.S. and other economies worldwide;

• disruptions or deficiencies in our controls resulting from the implementation of our new enterprise resource planning system;

• the highly unpredictable nature and costs of litigation and other legal activities and the risk of adverse results of such matters;

• worldwide economic effects of terrorist attacks, natural disasters and military conflict;

• our ability to control costs;

• competitive pricing and declines in average selling prices;

• timing and volume of orders relative to production capacity;

• fluctuations in manufacturing yields;

• competition;

• dependence on international operations and sales;

• dependence on raw material and equipment suppliers and changes in raw material and precious metal costs;

• exchange rate fluctuations;

• dependence on key personnel;

• difficulties in managing growth;

• enforcement of intellectual property rights;

• environmental and other governmental regulations; and

• technological challenges.

Other important risk factors that could affect the outcome of the events set forth in these statements and that could affect our operating results and financial condition are discussed in the company’s Annual Report on Form 10-K for the year ended December 31, 2009 and in the company’s subsequent filings with the Securities and Exchange Commission made prior to or after the date hereof. Amkor undertakes no obligation to review or update any forward-looking statements to reflect events or circumstances occurring after the date of this press release.

Contact:

Amkor Technology, Inc., Chandler
Joanne Solomon
Executive Vice President & Chief Financial Officer
480-786-7878
joanne.solomon@amkor.com

AMKOR TECHNOLOGY, INC.
Selected Operating Data

	Q4 2010			Q3 2010			Q4 2009			2010			2009
Sales Data:
Packaging services (in millions):
Chip scale package	$	272		$	244		$	224		$	954		$	695
Ball grid array		186			212			142			747			500
Leadframe		176			204			184			761			587
Other packaging		46			52			47			188			152
Packaging services		680			712			597			2,650			1,934
Test services		71			82			71			289			245
Total sales	$	751		$	794		$	668		$	2,939		$	2,179
Packaging services:
Chip scale package		36	%		31	%		33	%		33	%		32	%
Ball grid array		25	%		27	%		21	%		25	%		23	%
Leadframe		24	%		26	%		28	%		26	%		27	%
Other packaging		6	%		6	%		7	%		6	%		7	%
Packaging services		91	%		90	%		89	%		90	%		89	%
Test services		9	%		10	%		11	%		10	%		11	%
Total sales		100	%		100	%		100	%		100	%		100	%
Packaged units (in millions):
Chip scale package		590			618			519			2,130			1,652
Ball grid array		61			72			53			228			205
Leadframe		1,579			2,185			1,856			7,466			5,773
Other packaging		4			8			7			24			24
Total packaged units		2,234			2,883			2,435			9,848			7,654
Net sales from top ten customers		57	%		55	%		55	%		54	%		53	%
Capacity Utilization (Packaging and test utilization separately presented beginning in Q4 2010. Prior periods were recalculated based on current methodology for comparability):
Packaging		78	%		85	%		87	%		82	%		76	%
Test		74	%		87	%		74	%		78	%		67	%
End Market Distribution Data (an approximation including representative devices and applications based on a sampling of our largest customers. Prior periods were revised for an expanded sampling methodology and refinement of our classifications):
Communications (cell phones, Ethernet, WiMAX, wireless LAN, Bluetooth)		40	%		34	%		39	%		36	%		37	%
Consumer (gaming, set top boxes, TV, portable media)		26	%		30	%		26	%		28	%		28	%
Computing (PCs, servers, displays, hard disk drive, printers, other peripherals)		12	%		14	%		13	%		14	%		14	%
Networking (infrastructure, routers, network servers)		13	%		13	%		13	%		13	%		13	%
Other (auto, industrial)		9	%		9	%		9	%		9	%		8	%
Total		100	%		100	%		100	%		100	%		100	%
Gross Margin Data:
Net sales		100	%		100	%		100	%		100	%		100	%
Cost of sales:
Materials		43	%		43	%		40	%		43	%		40	%
Labor		13	%		12	%		13	%		12	%		13	%
Other manufacturing		23	%		21	%		21	%		22	%		25	%
Gross margin		21	%		24	%		26	%		23	%		22	%

AMKOR TECHNOLOGY, INC.
Selected Operating Data

	2010			2009
	(in millions)
Return on Invested Capital:
Operating income	$	374		$	225
Income tax (expense) benefit		(19	)		30
Net operating profit after tax (NOPAT)	$	355		$	255
Invested capital:
Average debt	$	1,399		$	1,464
Plus average equity		507			310
Less average cash		(400	)		(410	)
Average invested capital	$	1,506		$	1,364
Return on invested capital (NOPAT / average invested capital)*		24	%		19	%

	Q4 2010			Q3 2010			Q4 2009			2010			2009
	(in millions, except per share data)
Capital Investment Data:
Property, plant and equipment additions	$	103		$	171		$	69		$	505		$	198
Net change in related accounts payable and deposits		66			(37	)		(7	)		(59	)		(24	)
Purchases of property, plant and equipment	$	169		$	134		$	62		$	446		$	174
Depreciation and amortization	$	87		$	83		$	75		$	324		$	306
Free Cash Flow Data:
Net cash provided by operating activities	$	176		$	176		$	106		$	543		$	262
Less purchases of property, plant and equipment		(169	)		(134	)		(62	)		(446	)		(174	)
Free cash flow*	$	7		$	42		$	44		$	97		$	88
Earnings per Share Data:
Net income attributable to Amkor — basic	$	51		$	78		$	88		$	232		$	156
Adjustment for dilutive securities on net income:
Interest on 2.5% convertible notes due 2011, net of tax		—			—			—			1			2
Interest on 6.25% convertible notes due 2013, net of tax		2			2			2			7			7
Interest on 6.0% convertible notes due 2014, net of tax		4			4			4			16			12
Net income attributable to Amkor — diluted	$	57		$	84		$	94		$	256		$	177
Weighted average shares outstanding — basic		183			183			183			183			183
Effect of dilutive securities:
Stock options and unvested restricted shares		1			—			—			1			—
2.5% convertible notes due 2011		3			3			3			3			5
6.25% convertible notes due 2013		13			13			13			13			13
6.0% convertible notes due 2014		83			83			83			83			62
Weighted average shares outstanding — diluted		283			282			282			283			263
Net income attributable to Amkor per common share:
Basic	$	0.28		$	0.42		$	0.48		$	1.26		$	0.85
Diluted	$	0.20		$	0.30		$	0.33		$	0.91		$	0.67

^* Return on invested capital (“ROIC”) is defined as net operating profit after tax divided by average invested capital (the sum of average debt plus average equity minus average cash). ROIC is not defined by generally accepted accounting principles (“GAAP”). We believe that ROIC is useful information for our investors in evaluating whether our capital investments are generating shareholder value.

We define free cash flow as net cash provided by operating activities less purchases of property, plant and equipment. Free cash flow is not defined by GAAP. However, we believe free cash flow to be relevant and useful information to our investors because it provides them with additional information in assessing our liquidity, capital resources and financial operating results. Our management uses free cash flow in evaluating our liquidity, our ability to service debt and our ability to fund capital additions.

However, these measures should be considered in addition to, and not as a substitute for, or superior to, other measures of financial performance prepared in accordance with GAAP, and our definitions of ROIC and free cash flow may not be comparable to similarly titled measures reported by other companies.

AMKOR TECHNOLOGY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS
(Unaudited)

	For the Three Months						For the Year
	Ended December 31,						Ended December 31,
	2010			2009			2010			2009
	(In thousands, except per share data)
Net sales	$	750,609		$	667,612		$	2,939,483		$	2,179,109
Cost of sales		591,266			492,258			2,275,727			1,698,713
Gross profit		159,343			175,354			663,756			480,396
Operating expenses:
Selling, general and administrative		62,037			54,640			242,424			210,626
Research and development		11,097			10,907			47,534			44,453
Total operating expenses		73,134			65,547			289,958			255,079
Operating income		86,209			109,807			373,798			225,317
Other (income) expense:
Interest expense		19,202			23,434			85,595			102,396
Interest expense, related party		3,813			3,813			15,250			13,000
Interest income		(675	)		(841	)		(2,950	)		(2,367	)
Foreign currency loss		4,746			1,178			13,756			3,339
Loss (gain) on debt retirement, net		—			570			18,042			(15,088	)
Equity in earnings of unconsolidated affiliate		(1,552	)		(2,373	)		(6,435	)		(2,373	)
Other income, net		(144	)		(36	)		(619	)		(113	)
Total other expense, net		25,390			25,745			122,639			98,794
Income before income taxes		60,819			84,062			251,159			126,523
Income tax expense (benefit)		10,058			(3,820	)		19,012			(29,760	)
Net income		50,761			87,882			232,147			156,283
Net (income) loss attributable to noncontrolling interests		(157	)		104			(176	)		(303	)
Net income attributable to Amkor	$	50,604		$	87,986		$	231,971		$	155,980
Net income attributable to Amkor per common share:
Basic	$	0.28		$	0.48		$	1.26		$	0.85
Diluted	$	0.20		$	0.33		$	0.91		$	0.67
Shares used in computing per common share amounts:
Basic		183,404			183,134			183,312			183,067
Diluted		282,830			282,495			282,602			263,379

AMKOR TECHNOLOGY, INC.
CONSOLIDATED BALANCE SHEETS
(Unaudited)

	December 31,			December 31,
	2010			2009
	(In thousands)
ASSETS
Current assets:
Cash and cash equivalents	$	404,998		$	395,406
Restricted cash		17,782			2,679
Accounts receivable:
Trade, net of allowances		392,327			328,252
Other		17,970			18,666
Inventories		191,072			155,185
Other current assets		37,918			32,737
Total current assets		1,062,067			932,925
Property, plant and equipment, net		1,537,226			1,364,630
Intangibles, net		13,524			9,975
Investments		28,215			19,108
Restricted cash		1,945			6,795
Other assets		93,845			99,476
Total assets	$	2,736,822		$	2,432,909
LIABILITIES AND EQUITY
Current liabilities:
Short-term borrowings and current portion of long-term debt	$	150,081		$	88,944
Trade accounts payable		443,333			361,263
Accrued expenses		178,794			155,630
Total current liabilities		772,208			605,837
Long-term debt		964,219			1,095,241
Long-term debt, related party		250,000			250,000
Pension and severance obligations		103,543			83,067
Other non-current liabilities		10,171			9,063
Total liabilities		2,100,141			2,043,208
Equity:
Amkor stockholders’ equity:
Preferred stock		—			—
Common stock, $0.001 par value, 500,000 shares authorized, 183,467 and 183,171 shares issued, and 183,420 and 183,171 shares outstanding, in 2010 and 2009, respectively		183			183
Additional paid-in capital		1,504,927			1,500,246
Accumulated deficit		(890,270	)		(1,122,241	)
Accumulated other comprehensive income		15,457			5,021
Treasury stock, at cost, 47 shares in 2010		(284	)		—
Total Amkor stockholders’ equity		630,013			383,209
Noncontrolling interests in subsidiaries		6,668			6,492
Total equity		636,681			389,701
Total liabilities and equity	$	2,736,822		$	2,432,909

AMKOR TECHNOLOGY, INC.
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(Unaudited)

	For the Year Ended
	December 31,
	2010			2009
	(In thousands)
Cash flows from operating activities:
Net income	$	232,147		$	156,283
Depreciation and amortization		323,608			305,510
Loss (gain) on debt retirement, net		10,562			(15,088	)
Other operating activities and non-cash items		11,522			(17,595	)
Changes in assets and liabilities		(35,244	)		(167,385	)
Net cash provided by operating activities		542,595			261,725
Cash flows from investing activities:
Purchases of property, plant and equipment		(445,669	)		(173,496	)
Proceeds from the sale of property, plant and equipment		3,125			3,116
Purchase of equipment leased to unconsolidated affiliate		—			(44,681	)
Investment in unconsolidated affiliate		—			(16,735	)
Financing lease payment from unconsolidated affiliate		13,384			—
Other investing activities		(15,761	)		(9,082	)
Net cash used in investing activities		(444,921	)		(240,878	)
Cash flows from financing activities:
Borrowings under revolving credit facilities		3,261			41,410
Payments under revolving credit facilities		(34,253	)		(10,171	)
Proceeds from issuance of short-term working capital facility		15,000			15,000
Payments of short-term working capital facility		(15,000	)		—
Proceeds from issuance of long-term debt		611,007			100,000
Proceeds from issuance of long-term debt, related party		—			150,000
Payments of long-term debt, net of redemption premiums and discounts		(663,433	)		(338,104	)
Payments for debt issuance costs		(7,487	)		(8,479	)
Proceeds from issuance of stock through stock compensation plans		1,048			693
Net cash used in financing activities		(89,857	)		(49,651	)
Effect of exchange rate fluctuations on cash and cash equivalents		1,775			(106	)
Net increase (decrease) in cash and cash equivalents		9,592			(28,910	)
Cash and cash equivalents, beginning of period		395,406			424,316
Cash and cash equivalents, end of period	$	404,998		$	395,406