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 April 2007

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 March 2007 Sales Report

Hsinchu, Taiwan, R.O.C. — April 10, 2007 — TSMC (TAIEX: 2330, NYSE: TSM) today announced its net sales for March 2007: on an unconsolidated basis, sales were NT$21,918 million, an increase of 6.5 percent over February 2007 and a decrease of 19.1 percent from March 2006. Revenues for January through March 2007 totaled NT$63,347 million, a decrease of 18.0 percent compared to the same period in 2006.

On a consolidated basis, net sales for March 2007 were NT$22,560 million, an increase of 7.7 percent from February 2007; revenues for January through March 2007 totaled NT$64,897 million.

TSMC Sales Report (Unconsolidated):

										(Unit: NT$ million)
Net Sales			2007*				2006			Increase (Decrease) %
March			21,918				27,107				(19.1	)
January through March			63,347				77,293				(18.0	)

* Year 2007 figures have not been audited.

TSMC Spokesperson:

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

TSMC Acting Spokesperson:

Mr. J.H. Tzeng
Deputy Director, PR Department, TSMC
Tel: 886-3-505-5028
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: 886-3-505-5038
Mobile: 886-911-258751
Fax: 886-3-567-0121
E-Mail: cychung@tsmc.com

Taiwan Semiconductor Manufacturing Company Limited
April 10, 2007

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 March 2007.

1) Sales volume (in NT$ thousand)

Period		Items				2007				2006
Mar		Net sales					21,917,909				27,106,885
Jan — Mar		Net sales					63,346,589				77,293,344

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

		Limit of lending				Mar				Bal. as of period end
TSMC			101,596,257				—				—
TSMC’s subsidiaries			32,690,873				—				—

3) Endorsements and guarantees (in NT$ thousand)

		Limit of endorsements				Mar				Bal. as of period end
TSMC			126,995,321				—				—
TSMC’s subsidiaries			N/A				—				—
TSMC endorses for subsidiaries							—				—
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)

						Forward				Swap				Others
														Buy put				Sell call
Margin Payment							—				—				—				—
Premium Income (Expense)							—				—				—				—
Outstanding Contracts		Notional Amount					989,690				27,525,980				—				—
		Mark to Market Profit/Loss					(18,717	)			(114,925	)			—				—
Expired Contracts		Notional Amount					3,929,489				52,289,605				1,310,840				1,310,840
		Realized Profit/Loss					(25,187	)			(485,249	)			—				—

     TSMC’s subsidiaries

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

						Forward				Swap				Others
														Buy put				Sell call
Margin Payment							—				—				—				—
Premium Income (Expense)							—				—				—				—
Outstanding Contracts		Notional Amount					3,101				—				—				—
		Mark to Market Profit/Loss					(5	)			—				—				—
Expired Contracts		Notional Amount					43,986				—				—				—
		Realized Profit/Loss					(198	)			—				—				—

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.