TAIPEI, Taiwan, April 8 /PRNewswire-Asia-FirstCall/ -- United Microelectronics Corporation (NYSE: UMC), (UMC) today reported unaudited net sales for the month of March 2009.

    Revenues for March 2009

    Period             2009          2008    Y/Y Change     Y/Y(%)   M/M(%)
    March         4,541,317     8,498,439    -3,957,122    -46.56%  +44.45%
    Jan.- Mar.   10,838,136    24,002,911   -13,164,775    -54.85%      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/