Dr. I. C. Chen Joins UMC as Vice President

HSINCHU, Taiwan, July 8, 2010 – United Microelectronics Corporation (NYSE: UMC; TSE: 2303) ("UMC"), a leading global semiconductor foundry, today announced that Dr. Ih Chin Chen has joined the company as vice president of Advanced Technology Development, sharing the responsibility with current division vice president S. C. Chien for the development of advanced technologies at UMC.

Dr. I. C. Chen brings more than 20 years of experience in semiconductor technology research and development at major semiconductor companies in the United States, China, and Taiwan. He has published over 120 academic papers in professional journals worldwide and possesses 30 patents in various countries. Dr. Chen earned his bachelor's degree in electrical engineering from National Taiwan University, and his master's and doctorate degrees in electrical engineering and computer science from the University of California, Berkeley.

Together with his Co-V.P. S. C. Chien, Dr. Chen will apply his extensive research experience to lead the company's excellent research and development team toward enhancing UMC's advanced technology development capabilities and providing customers with the best advanced and customer-driven technology solutions available.

About UMC

UMC (NYSE: UMC, TSE: 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 approximately 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.