UMC Reports Sales for June 2012

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

Revenues for June 2012

Period	2012	2011	Y/Y Change	Y/Y (%)	M/M (%)
June	9,289,147	9,185,722	+103,425	+1.13%	+0.9%
Jan.-June	51,385,287	56,267,539	-4,882,252	-8.68%	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.