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

    Revenues for December 2008

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

    December    4,609,683     8,463,794    -3,854,111   -45.54%   -23.49%
    Jan.-Dec.  92,530,051   106,771,051   -14,241,000   -13.34%       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/