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 July 2006

Taiwan Semiconductor Manufacturing Company Ltd.

(Translation of Registrant’s Name Into English)

(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 June 2006 Sales Report

Hsinchu, Taiwan, R.O.C. — July 10, 2006 — TSMC (TAIEX: 2330, NYSE: TSM) today announced its net sales for June 2006: on an unconsolidated basis, sales were NT$27,295 million, an increase of 2.0 percent over May 2006 and an increase of 35.8 percent over June 2005; revenues for January through June 2006 totaled NT$158,521 million, an increase of 38.8 percent over the same period in 2005.

On a consolidated basis, net sales for June 2006 were NT$27,647 million, an increase of 1.9 percent over May 2006; revenues for January through June 2006 totaled NT$160,010 million.

TSMC Sales Report (Unconsolidated):

(Unit: NT$ million)

Net Sales		2006*				2005				Increase (Decrease) %
June			27,295				20,105				35.8
January through June			158,521				114,169				38.8

* Year 2006 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

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
July 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 June 2006.

1) Sales volume (in NT$ thousand)

Period		Items		2006				2005
June.		Net sales			27,294,797				20,105,150
Jan.-June.		Net sales			158,520,691				114,169,434

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

		Limit of lending				June.				Bal. as of period end
TSMC			95,586,606				—				—
TSMC’s subsidiaries			32,009,175				(1,120,665	)			—

3) Endorsements and guarantees (in NT$ thousand)

		Limit of endorsements				June.				Bal. as of period end
TSMC			119,483,257				22,800	*			1,943,940
TSMC’s subsidiaries			N/A				—				—
TSMC endorses for subsidiaries							22,800	*			1,943,940
TSMC’s subsidiaries endorse for TSMC							—				—
TSMC endorses for PRC companies							—				—
TSMC’s subsidiaries endorse for PRC companies							—				—

* The deviation was due to the fluctuation in currency exchange rate.

4) Financial derivative transactions (in NT$ thousand)

												Others
				Forward				Swap				Buy put				Sell call
Margin Payment					—				—				—				—
Premium Income (Expense)					—				—				—				—
Outstanding Contracts		Notional Amount			731,700				73,076,310				—				—
		Mark to Market Profit/Loss			(8,265	)			(269,187	)			—				—
Expired Contracts		Notional Amount			9,829,118				210,840,466				639,620				639,620
		Realized Profit/Loss			54,755				412,612				—				—

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.