UMC Reports Sales for February 2011

TAIPEI, Taiwan, March 8, 2011-- United Microelectronics Corporation (NYSE:  UMC; TWSE: 2303) ("UMC"), today reported unaudited net sales for the month of February 2011.

Revenues for February 2011

Period	2011	2010	Y/Y Change	Y/Y (%)	M/M (%)
February	9,007,512	8,634,850	+372,662	+4.32%	-5.43%
Jan.-Feb.	18,532,567	17,235,303	+1,297,264	+7.53%	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.