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 March 2010

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 has no further comment on acquisition rumor regarding Taiwan Mask Corporation

According to today’s media report, TSMC is rumored to be planning an acquisition of Taiwan Mask. Since Taiwan Mask has already denied this matter officially, there is no need for TSMC to further comment.

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: March 29, 2010	By	/s/ Lora Ho
		Lora Ho
		Vice President & Chief Financial Officer