CHANDLER, Ariz. -- Amkor Technology, Inc. (Nasdaq: AMKR) said today that the Administrative Law Judge (“ALJ”) in Amkor’s patent infringement case against Carsem in the International Trade Commission (“ITC”) has issued a Supplemental Initial Determination. Although the ALJ’s ruling did not disturb the prior finding that Carsem Dual and Quad Flat No-Lead Packages infringe some of Amkor’s patent claims relating to MicroLeadFrame® (MLF) technology, the ALJ found that some of Amkor’s patent claims are invalid and, as a result, the ALJ did not find a statutory violation of the Tariff Act.

"We are disappointed that the Supplemental Initial Determination did not find a statutory violation of the Tariff Act and disagree with the ALJ’s conclusions regarding the invalidity of some of our asserted patent claims," said Ken Joyce, Amkor's President and Chief Executive Officer. "The ALJ’s ruling is not final and we will now be taking steps to seek a ruling by the Commission to modify the ALJ’s decision and issue an exclusion order that would prohibit Carsem from importing its infringing QFN products into the United States.”

The target date for a final ruling by the Commission is July 20, 2010.

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.

Contact:

Amkor Technology, Inc.
Gil C. Tily
Executive Vice President & General Counsel
480-821-5000 (ext. 5162)