Taipei, Taiwan, R.O.C. - June 13, 2005 - United Microelectronics Corporation (TAIEX: 2303, NYSE: UMC), today held its 2005 annual shareholders meeting, at which shareholders approved a stock dividend payment of NT$1 and cash dividend payment of NT$0.1 per common share for fiscal 2004.

At the meeting, shareholders also approved:

1. The business report and financial statements for fiscal 2004. The Company's revenue for 2004 was NT$117,312 million and net income after tax was NT$31,843 million, with earnings per share of NT$1.89.
2. A capitalization of NT$19,560,219,650 from un-appropriated earnings for and prior to the year 2004.
3. The amendment of Article 5, 15 of the Articles of Incorporation for the Company's operational needs, the amendment of the Company's dividend policy in Article 22 so that no less than 20% of the dividend shall be allocated in the form of cash dividend, and the subsequent amendment of Article 25 to record the most recent amendments to the Articles of Incorporation.
4. An extraordinary motion submitted by a group of shareholders representing a 2.59% stake in the Company. With regard to the public statements made by the Chairman regarding UMC's relationship with Hejian Technology Corporation at the Shareholders Meeting of June 3, 2002, and in the subsequent public statements published in Taiwan newspapers on February 18th and March 21 of 2005, they propose to:
   
   
   • Agree with the Chairman's Mainland China business strategy
   • Agree that the assistance given in the past by the Chairman and UMC's
   • management team was in the Company's long-term interest, and, in no way, violated the obligations of their offices. Agree to support the Chairman's future decisions regarding Hejian.
   • Approve the acquisition of the 15% equity share from Hejian's holding company as a UMC asset upon legal sanction of such a share transfer.
   • Agree that any attempt to make the Chairman or management team take any type of responsibility related to the relationship between UMC and Hejian or the acquisition of shares from Hejian's holding company, for any reason, is against the best interests of the company and its shareholders.

UMC (NYSE: UMC, TSE: 2303) is a leading global semiconductor foundry that manufactures advanced process ICs for applications spanning every major sector of the semiconductor industry. UMC delivers cutting-edge foundry technologies that enable sophisticated system-on-chip (SoC) designs, including 90nm copper, 0.13um copper, and mixed signal/RFCMOS. UMC is also a leader in 300mm manufacturing; Fab 12A in Taiwan and Singapore-based Fab 12i are both in volume production for a variety of customer products. UMC employs approximately 10,500 people worldwide and has offices in Taiwan, Japan, Singapore, Europe, and the United States. UMC can be found on the web at http://www.umc.com.