TAIPEI, Taiwan, July 9 /PRNewswire-Asia-FirstCall/ -- United Microelectronics Corporation (NYSE: UMC), (UMC) today reported unaudited net sales for the month of June 2009.

    Revenues for June 2009

    Period            2009          2008    Y/Y Change    Y/Y(%)   M/M(%)
    June         8,235,925     8,104,590      +131,335    +1.62%    +9.6%
    Jan.-June   33,465,873    49,235,386   -15,769,513   -32.03%      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 / Tien Yu Tseng
     UMC, Investor Relations
     Tel:   +886-2-2700-6999, ext. 6957
     Email: bowen_huang@umc.com
            tien_yu_tseng@umc.com

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