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

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 April 2006 Sales Report

Hsinchu, Taiwan, R.O.C. — May 10, 2006 — TSMC (TAIEX: 2330, NYSE: TSM) today announced that net sales for April 2006, on an unconsolidated basis, were NT$27,162 million; on a consolidated basis, net sales were NT$27,388 million (Revenues from foreign subsidiaries were translated by monthly average exchange rate).

On the unconsolidated basis, April 2006 net sales increased 0.2 percent over March 2006 and grew 43.7 percent year-over-year. Revenues for January through April 2006 totaled NT$104,456 million, an increase of 40.1 percent over the same period of 2006.

TSMC Sales Report (Unconsolidated):

(Unit: NT$ million)

Net Sales		2006*				2005				Increase (Decrease) %
April			27,162				18,903				43.7
January through April			104,456				74,556				40.1

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

May 10, 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 April 2006.

1)

Sales volume (in NT$ thousand)

Period		Items		2006				2005
Apr		Invoice amount			25,978,092				18,455,065
Jan — Apr		Invoice amount			95,861,009				70,763,456
Apr		Net sales			27,162,375				18,903,406
Jan — Apr		Net sales			104,455,720				74,556,623

2)

Funds lent to other parties (in NT$ thousand)

		Limit of lending				Apr				Bal. as of period end
TSMC			95,586,606				—				—
TSMC’s subsidiaries			31,529,023				(19,145)	*			1,116,955

3)

Endorsements and guarantees (in NT$ thousand)

Limit of endorsements						Apr				Bal. as of period end
TSMC			119,483,257				(32,820)	*			1,914,780
TSMC’s subsidiaries			N/A				—				—
TSMC endorses for subsidiaries							(32,820)	*			1,914,780
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			0				75,242,320					-
Mark to Market Profit/Loss			0				825,055					-
Expired Contracts
Notional Amount			3,167,423				137,287,221					-
Realized Profit/Loss			68,605				759,993					-

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.

		Taiwan Semiconductor Manufacturing Company Ltd.
Date: May 10, 2006		By		/s/		Lora Ho
						Lora Ho
						Vice President & Chief Financial Officer