HSINCHU, Taiwan, April 2, 2002 - United Microelectronics Corporation (NYSE: UMC) today made a final announcement regarding its impact evaluation for the 6.8 magnitude (Hsinchu 4.0, Tainan 2.0) earthquake that struck Taiwan on March 31st.

Although the earthquake caused some loss of productivity on March 31st and the following day, production is already approaching 100% of the level immediately prior to the earthquake. UMC's Fab 12A, located in Tainan, was completely unaffected by earthquake. There were very minor losses associated with a small number of wafers that must be scrapped due to damage incurred during the earthquake.

"We are pleased that our previous preparations and the timely response from our engineering team have allowed us to realize only a slight disruption from this recent earthquake," said Robert Tsao, Chairman of UMC. "We are also thankful for the safety of our employees and would like to assure our customers that production will proceed as usual."