TAIPEI, Taiwan, July 9 /Xinhua-PRNewswire-FirstCall/ -- United Microelectronics Corporation (NYSE: UMC), (UMC) today reported unaudited net sales for the month of June 2007.

    Revenues for June 2007

     Period         2007         2006      Y/Y Change     Y/Y(%)    M/M(%)
      June       8,745,231    8,783,807       -38,576     -0.44%    +6.39%
    Jan.-June   48,121,964   50,134,966    -2,013,002     -4.02%      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 / Dylan Lee
     UMC, Investor Relations
     Tel:   +886-2-2700-6999, ext. 6957
     Email: 
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Web site: http://www.umc.com/