1980
May
UMC established
1985
July
Becomes the first IC company to list on the Taiwan Stock Exchange
1995
July
Begins transformation into a pure-play foundry
September
Three joint venture foundry companies established
September
8 inch fab begins production
1996
January
0.35-micron volume production
1997
October
0.25-micron volume production
1998
April
Acquires Holtek Semiconductor fab
December
Acquires Nippon Steel Semiconductor Corp. fab; renamed Fab UMCJ in 2001
1999
March
0.18-micron volume production
November
Begins construction of 300mm fab in Taiwan's Tainan Science Park, Fab 12A