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 September 2006

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 August 2006 Sales Report

Hsinchu, Taiwan, R.O.C. — September 8, 2006 — TSMC (TAIEX: 2330, NYSE: TSM) today announced its net sales for August 2006: on an unconsolidated basis, sales were NT$27,000 million, a decrease of 2.1 percent from July 2006 and an increase of 16.5 percent over August 2005. Revenues for January through August 2006 totaled NT$213,087 million, an increase of 34.7 percent over the same period in 2005.

On a consolidated basis, net sales for August 2006 were NT$ 27,284 million, a decrease of 2.4 percent from July 2006; revenues for January through August 2006 totaled NT$ 215,253 million.

TSMC Sales Report (Unconsolidated):

										(Unit: NT$ million)
Net Sales			2006	*			2005			Increase (Decrease) %
August			27,000				23,182				16.5
January through August			213,087				158,199				34.7

* Year 2006 figures have not been audited.

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

Mr. J.H. Tzeng
PR Department Manager, TSMC
Tel: 886-3-505-5028
Mobile: 0928-882607
Fax: 886-3-567-0121
E-Mail: jhtzeng@tsmc.com

Richard C.Y. Chung
Media Relations Manager, TSMC
Tel: 886-3-505-5038
Mobile: 886-911-258751
Fax: 886-3-567-0121
E-Mail: cychung@tsmc.com

Taiwan Semiconductor Manufacturing Company Limited
September 08, 2006

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 August 2006.

1) Sales volume (in NT$ thousand)

Period		Items				2006				2005
Aug		Net sales					26,999,936				23,182,037
Jan — Aug		Net sales					213,087,333				158,198,537

2) Funds lent to other parties (in NT$ thousand)

		Limit of lending				Aug				Bal. as of period end
TSMC			89,366,469				—				—
TSMC’s subsidiaries			32,510,075				—				—

3) Endorsements and guarantees (in NT$ thousand)

		Limit of endorsements				Aug				Bal. as of period end
TSMC			111,708,087				9,000	*			1,974,360
TSMC’s subsidiaries			N/A				—				—
TSMC endorses for subsidiaries							9,000	*			1,974,360
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)

		TSMC		*
		Hedging purpose (for assets / liabilities denominated in foreign currencies)

														Others
						Forward				Swap				Buy put				Sell call
Margin Payment							—				—				—				—
Premium Income (Expense)							—				—				—				—
Outstanding Contracts		Notional Amount					11,246,875				63,615,222				—				—
		Mark to Market Profit/Loss					692				(364,470	)			—				—
Expired Contracts		Notional Amount					12,671,256				296,534,226				639,620				639,620
		Realized Profit/Loss					32,463				(1,003,594	)			—				—

TSMC’s subsidiaries Hedging purpose (for assets / liabilities denominated in foreign currencies)

														Others
						Forward				Swap				Buy put				Sell call
Margin Payment							0				—				—				—
Premium Income (Expense)							0				—				—				—
Outstanding Contracts		Notional Amount					13,106				—				—				—
		Mark to Market Profit/Loss					(21	)			—				—				—
Expired Contracts		Notional Amount					533,921				—				—				—
		Realized Profit/Loss					2,435				—				—				—

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.