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 August 2005

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: ___.)

 

 

For the month of July 2005

This is to report 1) the changes in the shareholdings of our directors, supervisors, executive officers and shareholders who own more than 10% of total outstanding common shares of Taiwan Semiconductor Manufacturing Company Ltd. (The Company; “TSMC”) (NYSE:TSM); 2) the pledge and clear of pledge of TSMC common shares by our directors, supervisors, executive officers and shareholders who own more than 10% of total outstanding common shares of TSMC; 3) the acquisition of assets by TSMC and 4) the disposition of assets by TSMC for the month of July 2005.

1)

The changes in the shareholdings of our directors, supervisors, executive officers and shareholders who own more than 10% of total outstanding common shares:

				Number of				Number of
				shares held as				shares held as
Title		Name		of June 30, 2005				of July 31, 2005				Changes
Director, President & CEO		Rick Tsai			26,963,795				26,823,795				-140,000
Senior Vice President		S.Y. Chiang			11,271,306				10,671,306				-600,000
Senior Vice President		Kenneth Kin			4,054,860				3,874,860				-180,000
Senior Vice President		Stephen T. Tso			13,640,380				13,590,380				-50,000
Vice President		C. C. Wei			6,000,079				5,910,079				-90,000
Vice President		Mark Liu			10,607,792				10,557,792				-50,000
Vice President		Genda Hu			2,921,824				2,885,824				-36,000
Vice President		Ping Yang			5,920,085				5,720,085				-200,000
Vice President & General Counsel		Richard Thurston			2,542,211				2,502,211				-40,000
Vice President & CFO		Lora Ho			3,822,392				3,792,392				-30,000
Vice President		Wei Jen Lo			742,552				722,552				-20,000
Senior Director		L.C. Tu			8,241,827				8,233,827				-8,000

2)		The pledge and clear of pledge of TSMC common shares by our directors, supervisors, executive officers and shareholders who own more than 10% of total outstanding common shares: None.
3)		The acquisition of assets:

Description of assets		Purchase price
Machinery Equipment		NT$893,470,860
Corporate Bonds		US$9,779,782

4)

The disposition of assets: None.

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.