Monthly Sales Report - December 1999

Hsinchu, Taiwan, January 7, 2000- Taiwan Semiconductor Manufacturing Company Ltd. ("TSMC" or "the Company" ) (TAIEX: 2330, NYSE: TSM) today announced that its net sales for December 1999 were NT$8,621 million, a new record breaking the prior highest. The Company's total revenues for fiscal year 1999 also set another record high at NT$ 73,131 million.

Mr. YC Huang, TSMC Spokesman, pointed out that due to the strong demand for foundry services, the Company's capacity utilization surpassed 100% in December 1999. Sales for December 1999 reached NT$8,621 million, a 9.7% increase over November 1999 and a substantial increase of 149.2% on a year-over-year basis. The Company's sales revenues for 1999 totaled NT$73,131 million, representing a 45.6% increase than those of 1998.