Monthly Sales Report - November 1999

Hsin-Chu, Taiwan, December 9, 1999 - Taiwan Semiconductor Manufacturing Company Ltd. ("TSMC" or "the Company" ) (TAIEX: 2330, NYSE: TSM) today announced that its net sales for November 1999 were NT$7,859 million, a new record breaking the prior highest.

Mr. YC Huang, TSMC Spokesman, pointed out that fueled by strong demand for foundry services, the Company's capacity was fully utilized again in November 1999. Sales for November 1999 equaled NT$7,859 million, a 9.0% increase over October 1999 and a substantial increase of 98.5% on a year-over-year basis. The Company's sales revenues from January through November 1999 totaled NT$64,511 million, representing a 37.9% increase over the corresponding period of 1998.