TAIPEI, Taiwan, Oct 08, 2008 /Xinhua-PRNewswire-FirstCall via COMTEX News Network/ -- United
Microelectronics Corporation (NYSE: UMC; TAIEX: 2303), (UMC) today reported
unaudited net sales for the month of September 2008.

    Revenues for September 2008

    Period            2008          2007    Y/Y Change      Y/Y(%)     M/M(%)
    September     8,051,904   10,542,277    -2,490,373     -23.62%     -1.39%
    Jan.-Sep.    73,989,098   79,150,478    -5,161,380      -6.52%        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 or I Cheng Lu
     UMC, Investor Relations
     Tel:   +886-2-2700-6999, ext. 6957
     Email: bowen_huang@umc.com
            i_cheng_lu@umc.com

SOURCE United Microelectronics Corporation

http://www.umc.com

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