Monthly Sales Report - November 1998

Hsin-Chu, Taiwan, December 9, 1998- Taiwan Semiconductor Manufacturing Company Ltd. (TAIEX: 2330, NYSE: TSM), ("TSMC" or "the Company") today announced that its net sales for November, 1998 were NT$3,960 million; revenue from January to November, 1998 was NT$46,774 million.

Net sales in November, 1998 deceased 24.4% from NT$5,238 million in the same period a year ago mainly as a result of the decrease in unit sales and average selling price (ASP).

On a sequential basis, net sales decreased 6% from NT$4,214 million in October, 1998 mainly due to the decrease in ASP primarily resulting from unfavorable foreign exchange movement. For the first eleven months of 1998, net sales increased 21.3% to NT$46,774 million from NT$38,576 million in the same period in 1997.

TSMC spokesman, Mr. YC Huang, pointed out that 1998 has seen a severe decline in worldwide semiconductor industry. However, TSMC 1998 revenue from January to November has accumulated to NT$46,774 million and the growth rate from 1997 to 1998 is expected to continue to be a two-digit number. Meanwhile, TSMC's outstanding management has made TSMC recognized as the top one company among 100 Asia's best managed companies in a recent survey undertaken by Asiamoney.