UMC Reports Sales for February 2013

Taipei, Taiwan -- March 8, 2013--United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today reported unaudited net sales for the month of February 2013.

Revenues for February 2013

Period	2013	2012	Y/Y Change	Y/Y (%)
February	8,730,655	8,442,542	+288,113	+3.41%
Jan.-Feb.	18,182,771	17,287,030	+895,741	+5.18%

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

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