1934 Act Registration No. 1-14700

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16 OF
THE SECURITIES EXCHANGE ACT OF 1934

For the month of October 2005

Taiwan Semiconductor Manufacturing Company Ltd.

(Translation of Registrant’s Name Into English)

No. 8, Li-Hsin Rd. 6,
Hsinchu Science Park,
Taiwan
(Address of Principal Executive Offices)

     (Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.)

	Form 20-F þ		Form 40-F o

     (Indicate by check mark whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.)

	Yes o		No þ

(If “Yes” is marked, indicated below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82:                     .)

 

 

TSMC September 2005 Sales Set Record High

Hsinchu, Taiwan, R.O.C. — October 7, 2005 — TSMC (TAIEX: 2330, NYSE: TSM) today announced that net sales for September 2005 reached a record high of NT$25,229 million, and that revenues for January through September 2005 were NT$183,427 million.

Ms. Lora Ho, TSMC vice president and chief financial officer, noted that, “Due to continued demand recovery from our customers, wafer shipments for September 2005 increased over August 2005. As a result, net sales for September 2005 increased by 8.8 percent compared to August 2005. On a year-over-year basis, net sales for September 2005 increased 8.9 percent.”

Sales Report:

										(Unit: NT$ million)
Net Sales		2005*				2004				Increase (Decrease) %
September			25,229				23,174				8.9
January through September			183,427				192,117				(4.5	)

TSMC Spokesperson:

Ms. Lora Ho
Vice President and CFO
Tel: 886-3-566-4602

TSMC Acting Spokesperson:

Mr. J.H. Tzeng
PR Department Manager, TSMC
Tel: 886-3-666-5028
Mobile: 0928-882607
Fax: 886-3-567-0121
E-Mail: jhtzeng@tsmc.com

For further information, please contact:

Richard C.Y. Chung
Media Relations Manager, TSMC
Tel: 886-3-666-5038
Mobile: 886-911-258751
Fax: 886-3-567-0121
E-Mail: cychung@tsmc.com

Taiwan Semiconductor Manufacturing Company Limited

October 06, 2005

This is to report the changes or status of 1) sales volume, 2) funds lent to other parties, 3) endorsements and guarantees, and 4) financial derivative transactions for the period of September 2005.

1)

Sales volume (in NT$ thousand)

Period		Items				2005				2004
Sep.		Invoice amount					20,909,188				21,409,780
Jan — Sep.		Invoice amount					172,826,864				184,652,073
Sep.		Net sales					25,228,512				23,173,529
Jan — Sep.		Net sales					183,427,049				192,117,483

2)

Funds lent to other parties (in NT$ thousand)

		Limit of lending				Sep.				Bal. as of period end
TSMC			76,839,985				—				—
TSMC’s subsidiaries			32,788,682				39,330	*			2,986,920

3)

Endorsements and guarantees (in NT$ thousand)

		Limit of endorsements				Sep.				Bal. as of period end
TSMC			96,049,982				30,590	*			2,323,160
TSMC’s subsidiaries			N/A				—				—
TSMC endorses for subsidiaries							30,590	*			2,323,160
TSMC’s subsidiaries endorse for TSMC							—				—
TSMC endorses for PRC companies							—				—
TSMC’s subsidiaries endorse for PRC companies							—				—

4)

Financial derivative transactions (in NT$ thousand) Hedging purpose (for assets / liabilities denominated in foreign currencies)

						Forward				Swap				Others
Margin Payment							—				—				—
Premium Income (Expense)							—				—				—
Outstanding Contracts		Notional Amount					22,264,587				51,087,310				—
		Mark to Market Profit/Loss					(236,202	)			(1,083,073	)			—
Expired Contracts		Notional Amount					103,233,146				226,962,138				—
		Realized Profit/Loss					160,998				(1,431,840	)			—

SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.