Amkor Technology, Inc. Licenses MLF Packaging Technology to STATS, Lawsuit Settled.

Business Editors/High-Tech & Legal Writers

CHANDLER, Ariz., SINGAPORE, & MILPITAS, Calif.--(BUSINESS WIRE)--Sept. 7, 2001--Amkor Technology Inc. ("Amkor")(Nasdaq:AMKR), the world's largest provider of outsourced semiconductor assembly and test services and ST Assembly Test Services Ltd. ("STATS")(Nasdaq:STTS)(SGX:ST Assembly), a leading independent semiconductor test and advanced packaging service provider, announced today that they have amicably resolved the pending patent infringement litigation between the two companies.

Amkor filed suit against STATS in February 2001 in the Eastern District of Texas, alleging infringement by STATS of United States Patent No. 6,143,981. Today's settlement resolves the litigation in its entirety. Amkor has granted STATS a non-exclusive license to practice the Amkor MicroLeadFrame(TM) (MLF(TM)) patents. STATS has in turn agreed to provide Amkor perpetual worldwide immunity from suit based on STATS Quad Leadless Package (QLP(TM)) technology.

Amkor's MLF(TM) and STATS' QLP(TM) are near chip scale plastic encapsulated packages with a copper leadframe. The packages offer perimeter pads to provide superior electrical contact to a printed circuit board, and thermal enhancement technology. The small size and lightweight along with excellent thermal and electrical performance make the packages an ideal choice for handheld portable applications.

About Amkor Technology Inc.

Amkor Technology (Nasdaq:AMKR), Inc. is the world's largest provider of contract microelectronics manufacturing solutions. The company offers semiconductor companies and electronics OEMs a complete set of microelectronic design and manufacturing services, including deep sub-micron wafer fabrication; wafer probe, wafer mapping, characterization and reliability testing; IC packaging design and assembly; multi-chip module design and assembly; and final testing. More information on Amkor is available from the company's SEC filings and on Amkor's web site: www.amkor.com.

About ST Assembly Test Services Ltd. (STATS)

ST Assembly Test Services ("STATS" - NNM: STTS and SGX: ST Assembly), is a leading semiconductor test and assembly service provider to fabless companies, integrated device manufacturers and wafer foundries. With its principal operations in Singapore and global operations in the United States, United Kingdom, Japan and Taiwan, STATS offers full back-end turnkey solutions to customers worldwide. STATS' expertise is in testing mixed-signal semiconductors, which are extensively used in fast growing communications applications such as data networking, broadband and mobile communications. STATS also offers advanced assembly services and has developed a wide array of traditional and advanced leadframe and laminate based products, including various ball grid array packages to serve some of the world's technological leaders. STATS was listed on the NASDAQ National Market and The Singapore Exchange in January 2000 and is in the Morgan Stanley Capital International (MSCI) Provisional Singapore Index. Further information is available at www.statsus.com.