UMC Reports Sales for February 2012

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

Revenues for February 2012
                                                                                      

Period	2012	2011	Y/Y Change	Y/Y (%)	M/M (%)
February	7,523,441	9,007,512	-1,484,071	-16.48%	-6.55%
Jan.-Feb.	15,574,363	18,532,567	-2,958,204	-15.96%	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.