UMC Statement regarding Recent Taiwan Earthquake

Hsinchu, Taiwan, December 27, 2006 -- United Microelectronics Corporation (NYSE: UMC, TSE: 2303) today announced that the 6.7 magnitude earthquake recorded off Southern Taiwan yesterday at 8:26 P.M and resulting aftershocks did not impact the company's production. UMC's Hsinchu fabs and Fab 12A in Tainan sustained only a very negligible impact to their operations from the earthquake, with no interruption in power or water service. Normal operations resumed shortly after the incident.

Contacts: