UMC Restructures Executive Team

                       UMC Restructures Executive Team

Mr. Po-Wen Yen appointed as CEO; former CEO Dr. Shih-Wei Sun promoted to vice

PR Newswire

HSINCHU, Taiwan, Nov. 19, 2012

HSINCHU, Taiwan, Nov.19, 2012 /PRNewswire/ --UMC (NYSE: UMC; TWSE: 2303), a
leading global semiconductor foundry, announced that its board of directors
today appointed senior vice president Mr. Po-Wen Yen as the company's new CEO,
effective immediately. Former CEO Dr. Shih-Wei Sun was promoted to the
position of UMC Vice Chairman. The move is intended to strengthen UMC's
competitiveness as Mr. Yen leverages his successful 300mm manufacturing
experience, just as the company brings its multi-billion dollar Fab 12A
expansion online.

"My top priority as CEO will be to ensure we meet customers' needs," said Mr.
Yen. "In addition, I am eager to tackle upcoming challenges as UMC steers
through industry and macroeconomic headwinds. I will focus on enhancing UMC's
core competencies of foundry process technology and manufacturing through
sound implementation and execution, and intend to take advantage of UMC's
world-class management team to further benefit our customers, shareholders,
and employees."

Dr. Sun commented, "It has been rewarding during my four years as CEO to
ensure quality execution of UMC's customer-driven strategy. I am grateful to
now serve as the company's vice chairman, with the opportunity to shape the
company's future direction from a strategic perspective. In the meantime, I
feel very confident in Mr. Po-Wen Yen's abilities to help achieve UMC's
business objectives."

Prior to becoming CEO, Po-Wen Yen was UMC's senior vice president responsible
for 12-inch operations. Mr. Yen joined UMC in 1986 and was responsible for the
operation of fabs 8AB and 8C. He also served as the vice president for UMC-SG,
UMC's 300mm operation in Singapore. In 2003, Mr. Yen received the National
Manager Excellence Award from Chinese Professional Management Association.

Mr. Yen earned his bachelor's degree in Chemical Engineering from National
Tsing Hua University and his masters in Chemical Engineering from National
Taiwan University.

About UMC

UMC (NYSE: UMC, TWSE: 2303) is a leading global semiconductor foundry that
provides advanced technology and manufacturing for applications spanning every
major sector of the IC industry. UMC's customer-driven foundry solutions allow
chip designers to leverage the company's leading-edge processes, which include
28nm poly-SiON and gate-last High-K/Metal Gate technology, 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. Fab 12A consists of
Phases 1-4 which are in production for customer products down to 28nm.
Construction is underway for Phases 5&6, with future plans for Phases 7&8. 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

Editorial Contacts:

Richard Yu
+886-2-2658-9168 ext. 16951

SOURCE United Microelectronics Corporation

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