UMC Reports Sales for December 2012

Taipei, Taiwan -- January 8, 2013--United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today reported unaudited net sales for the month of December 2012.

Revenues for December 2012

Period	2012	2011	Y/Y Change	Y/Y (%)	M/M (%)
December	7,796,821	8,104,902	-308,081	-3.80%	-13.47%
Jan.-Dec.	105,998,159	105,879,723	+118,436	+0.11%	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.