Monthly Sales Report - August 1998

Hsin-Chu, Taiwan, Sep 9th, 1998 - Taiwan Semiconductor Manufacturing Company Ltd. (TAIEX: 2330, NYSE: TSM), (TSMC or the 'Company') today announced that its net sales for August, 1998 were NT$3,801 million. For the first eight months of 1998, net sales were NT$34,168 million, a 40.1% increase over the corresponding period of 1997.

Mr. Y.C. Huang, Spokesman of the Company stated that the Company's August net sales started to pick up from the bottom, and it is expected that the revenue for September and for the fourth quarter this year will continue to follow the current trend.

In comparison with the same period a year ago, sales for August, 1998 declined 2.6%. On a sequential basis, net sales for August, 1998 increased by 25.4% from NT$3,030 million for July, 1998, primarily due to a 21% growth in unit sales.