UMC Reports Sales for September 2009

• Press Release
• Source: United Microelectronics Corporation
• On 2:50 am EDT, Thursday October 8, 2009

TAIPEI, Taiwan, Oct. 8 /PRNewswire-Asia-FirstCall/ -- United Microelectronics Corporation (NYSE: UMC; TAIEX: 2303), (UMC) today reported unaudited net sales for the month of September 2009.

    Revenues for September 2009

    Period            2009          2008    Y/Y Change     Y/Y(%)    M/M(%)
    September    9,534,518     8,051,904    +1,482,614   +18.41%    +5.22%
    Jan.-Sep.   60,871,955    73,989,098   -13,117,143   -17.73%       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 / Phil Lee / Tien Yu Tseng
     UMC, Investor Relations
     Tel:   +886-2-2700-6999, ext. 6957
     Email: bowen_huang@umc.com
            phil_lee@umc.com
            tien_yu_tseng@umc.com