UMC Reports Sales for December 2011

Taipei, Taiwan, January 9, 2012--United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today reported unaudited net sales for the month of December 2011.

Revenues for December 2011

Period	2011	2010	Y/Y Change	Y/Y (%)	M/M (%)
December	8,104,902	10,178,453	-2,073,551	-20.37%	+0.49%
Jan.-Dec.	105,879,723	120,430,736	-14,551,013	-12.08%	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.