Amkor Technology to Manufacture
Optical Switches for Onix Microsystems

Amkor Technology (Nasdaq: AMKR) has been selected to manufacture the PASSPORT all-optical switching engine from Onix Microsystems.

Based on micro-electromechanical systems (MEMS) technology, the PASSPORT all-optical switch will enable network equipment manufacturers and system providers the ability to effectively scale, manage, test and protect fiber optic networks.

Amkor will assemble, package and test the hermetic switch module, a 3.5" (88.9 mm) x 0.66" (16.5 mm) unit that will encase the switching components, including the MEMS module, fiber arrays, leads, and other devices. Amkor will assemble the PASSPORT at its A1, Advanced Package Development Center in Chandler, Ariz.

The contract marks Amkor's entry into optoelectronic component manufacturing.

"We chose Amkor because they are a recognized world leader in contract microelectronics manufacturing, and, coupled with our expertise in MEMS design, ensures that our all-optical switching engines will be reliable, scalable and offer the highest performance," said Steve Panyko, CEO of Onix.

"This strategic partnership with Onix capitalizes on our core competencies of assembling and testing microelectronic and MEMS devices," said Amkor President John Boruch. "Amkor's engineering expertise, supply chain management skills, and manufacturing proficiency with sub-micron geometry microelectronics are key elements to this fabrication program. We believe the rapidly growing optical component industry will increasingly turn to strategic manufacturing partners such as Amkor to meet its optoelectronic assembly and test requirements."

About Amkor Technology: Amkor Technology, 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 Onix Microsystems: Onix Microsystems (www.onixmicrosystems.com) designs, develops and supplies MEMS-based all-optical switching engines for telecommunications equipment suppliers. Onix's products cover the entire spectrum of optical switching needs, including network protection and provisioning, optical add/drop multiplexing and optical cross connects. Founded in October 1998, Onix Microsystems is a privately held company with headquarters in Richmond, CA.

For more information, contact:

Annie Ho
Always Communications
852-2855-7819
AnnieH@agrapha-group.com

Ken Jensen (Director - Communications)
Amkor Technology
1-(480) 821-2408 ext. 5130
kjens@amkor.com

Jeffrey Luth (VP Investor Relations)
Amkor Technology
1-(610) 431-9600 ext. 5613
jluth@amkor.com

Bob Matsuba (Manager - Marcom)
Onix Microsystems
1-(510) 669-2020 Ext. 1044
bmatsuba@onixmicrosystems.com