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 June 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 Set June 26 Record Date for Common Share Dividend

Hsinchu, Taiwan, R.O.C. — June 6, 2006 — TSMC (TAIEX: 2330, NYSE: TSM) today set June 26, 2006 as the record date for its common stock dividend. The ex-dividend date for TSMC common shares shall be June 20, 2006. The dividend includes a cash dividend of NT$2.4991 and a stock distribution of 0.0299903 shares for each common share.

As required by Article 165 of Taiwan’s Company Law, the shareholders’ register shall be closed for five days prior to the record date (June 22 through June 26, 2006) for registration transfer.

The above-mentioned dividend was calculated based on the total amount of profits to be distributed and capital surplus to be capitalized, as approved by the Company’s shareholder meeting on May 16, 2006, and the actual number of common shares outstanding on the record date for said dividend distribution. As a result of the employee stock options exercised between the day the Company’s board proposed said dividend distribution, and the record date of the distribution, the number of common shares outstanding has increased slightly, resulting in a miniscule difference in the per-share dividends from the per-share amount proposed by the Company’s board on February 14, 2006.

The ex-dividend date for TSMC American Depositary Shares (ADSs) will also be June 20, 2006. The record date for TSMC ADSs entitled to participate in this cash and stock dividends will be June 22, 2006. Holders of ADSs are encouraged to check with their securities brokers for receipt of the cash and stock dividend in their own accounts. Any questions regarding this upcoming dividend may be directed to Ms. Emi Mak at CitiBank, N.A. (Tel: 1-212-816-6693 / email: emi.p.mak@citigroup.com)

# # #

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

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: June 6, 2006	By /s/ Lora Ho
	Lora Ho
	Vice President & Chief Financial Officer