UMC to Provide Foundry Services for Sanken Electric

HSINCHU, Taiwan, March, 10, 2011 -- United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) ("UMC"), a leading global semiconductor foundry, today announced that it has agreed to offer manufacturing services to Sanken Electric Co., Ltd. ("Sanken"), a leading power semiconductor provider headquartered in Japan. The arrangement calls for UMC to provide a secure and highly competitive foundry manufacturing environment for power semiconductor products.

As an advanced technology leader and specialty process provider, UMC offers a wide range of power semiconductor processes to support its broad customer base. Through foundry support of this kind, UMC hopes to stimulate complementary production of power semiconductors targeting a variety of everyday applications.

Wen-Yang Chen, COO of UMC, said, "Our success in procuring Sanken's business further demonstrates that UMC's flexible foundry model meets customer demand for highly effective solutions to enable production outsourcing. We look forward to providing our proven foundry expertise to create a win-win situation for UMC and our customers."

About UMC

UMC (NYSE: UMC, TWSE: 2303) is a leading global semiconductor foundry that provides advanced technology and manufacturing services for applications spanning every major sector of the IC industry. UMC's customer-driven foundry solutions allow chip designers to leverage the strength of the company's leading-edge processes, which include production proven 65nm, 45/40nm, mixed signal/RFCMOS, and a wide range of specialty technologies. Production is supported through 10 wafer manufacturing facilities that include two advanced 300mm fabs; Fab 12A in Taiwan and Singapore-based Fab 12i are both in volume production for a variety of customer products. The company employs over 13,000 people worldwide and has offices in Taiwan, Japan, Singapore, Europe, and the United States. UMC can be found on the web at http://www.umc.com.

About UMC's High Voltage Process

UMC's high voltage (HV) technologies, including Double Diffused Drain MOSFET (DDDMOS), Field Drift MOSFET (FDMOS), Bipolar-CMOS-DMOS (BCD), CMOS-DMOS (CDMOS), are in stable, high volume, high yield production. These state-of-the-art process offerings can be applied to a variety of designs, such as cellular phone, DSC, laptop, chargers, and other products requiring robust HV devices.

About UMC JAPAN

UMC JAPAN (UMCJ), Japan's first and only dedicated-silicon foundry, provides advanced technologies and semiconductor manufacturing on a contractual basis. The company is a subsidiary of UMC. UMCJ can be found at http://www.umcj.com/english.