TAIPEI, Taiwan, July 8 /Xinhua-PRNewswire-FirstCall/ -- United Microelectronics Corporation (NYSE: UMC), (UMC) today reported unaudited net sales for the month of June 2008.

     Revenues for June 2008

     Period           2008         2007      Y/Y Change   Y/Y (%)  M/M (%)

      June         8,104,590     8,745,231     -640,641   -7.33%   -5.83%
      Jan.-June   49,235,386    48,121,964   +1,113,422   +2.31%     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 .

    Contacts:

     Bowen Huang / I Cheng Lu
     UMC, Investor Relations
     Tel.   +886-2-2700-6999 ext. 6957
     Email: bowen_huang@umc.com i_cheng_lu@umc.com

Web site: http://www.umc.com/