UMC Reports Sales for December 2008

TAIPEI, Taiwan, Jan. 8, 2009 -- United Microelectronics Corporation (NYSE: UMC; TAIEX: 2303), (UMC) today reported unaudited net sales for the month of December 2008.

Revenues for December 2008

Period	2008	2007	Y/Y Change	Y/Y(%)	M/M(%)
December	4,609,683	8,463,794	-3,854,111	-45.54%	-23.49%
Jan.-Dec.	92,530,051	106,771,051	-14,241,000	-13.34%	N/A

(*) All figures in thousands of New Taiwan Dollars (NT$), except for percentages.

Additional information about UMC is available on the web at http://www.umc.com .