TSMC Monthly Sales Report - April 2005

Hsinchu, Taiwan, R.O.C. – May 9, 2005 -- TSMC (TAIEX: 2330, NYSE: TSM) today announced that net sales for April 2005 totaled NT$18,903 million, and that revenues for January through April 2005 were NT$74,556 million.

Ms. Lora Ho, TSMC vice president and chief financial officer, noted that, “Due to higher wafer shipments, net sales for April 2005 increased by 7.3 percent compared to March 2005. On a year-over-year basis, net sales for April 2005 decreased 8.4 percent.”

“TSMC’s second quarter 2005 guidance, which was announced on April 26, remains unchanged,” Ms. Ho added.

Sales Report: (Unit: NT$ million)

Net Sales

2005(1)

2004

Increase (Decrease) %

April

18,903

20,631

(8.4)

January through April

74,556

78,144

(4.6)

(1): Year 2005 figures have not been audited.