UMC Files Form 20-F for 2007 with US Securities and Exchange Commission

Taipei, R.O.C. - May 2, 2008 - United Microelectronics Corporation (NYSE: UMC; TAIEX: 2303), (UMC) today filed its 2007 annual report on Form 20-F with the US Securities and Exchange Commission. The report is available at http://www.umc.com/english/investors/c.asp

Shareholders may request a hard copy of the Form 20-F free of charge. Please contact UMC-IR at ir@umc.com.