UMC Reports Sales for July 2012

Taipei, Taiwan, August 8, 2012--United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today reported unaudited net sales for the month of July 2012.

Revenues for July 2012

Period	2012	2011	Y/Y Change	Y/Y (%)	M/M (%)
July	9,612,979	8,809,481	+803,498	+9.12%	+3.49%
Jan.-July	60,998,267	65,077,020	-4,078,753	-6.27%	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.