UMC Reports Sales for October 2009

• Press Release
• Source: United Microelectronics Corporation
• On 1:50 am EST, Monday November 9, 2009

TAIPEI, Taiwan, Nov. 9 /PRNewswire-Asia-FirstCall/ -- United Microelectronics Corporation (NYSE: UMC; TAIEX: 2303), (UMC) today reported unaudited net sales for the month of October 2009.

    Revenues for October 2009


    Period           2009          2008    Y/Y Change    Y/Y(%)    M/M(%)
    October     9,296,818     7,906,693    +1,390,125   +17.58%    -2.49%
    Jan.-Oct.  70,168,774    81,895,792   -11,727,018   -14.32%       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:

     Phil Lee / Tien Yu Tseng
     UMC, Investor Relations
     Tel:   +886-2-2700-6999, ext. 6957
     Email: phil_lee@umc.com
            tien_yu_tseng@umc.com