UMC Reports Sales for August 2012

Taipei, Taiwan, September 7, 2012--United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today reported unaudited net sales for the month of August 2012.

Revenues for August 2012

Period	2012	2011	Y/Y Change	Y/Y (%)	M/M (%)
August	9,798,969	8,200,743	+1,598,226	+19.49%	+1.93%
Jan.-Aug.	70,797,236	73,277,763	-2,480,527	-3.39%	N/A

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