<PAGE> 1
Exhibit 10.43(a)
AMENDMENT TO OPTION AGREEMENT 2
This Amendment to Option Agreement 2 between Altera Corporation and Taiwan
Semiconductor Manufacturing Co., Ltd., dated October 1, 1995 (the "Option
Agreement 2"), is effective as of December 1, 1999 (the "Effective Date") by
and between Altera Corporation, a company organized under the laws of
California, USA, with its current registered address at 101 Innovation Drive,
San Jose, CA 95134, USA ("Customer"), and Taiwan Semiconductor Manufacturing
Co., Ltd., a company organized under the laws of the R.O.C., with its
registered address at No. 121, Park Ave. 3, Science-Based Industrial Park,
Hsin-Chu, Taiwan, R.O.C. ("TSMC").
RECITALS
WHEREAS, Customer desires to change the registered address and amend the
Capacity Factor Table in the Option Agreement 2; and
WHEREAS, TSMC desires to supply wafers in accordance to the Option Agreement 2
and the amended Capacity Factor Table.
AGREEMENT
In consideration of mutual covenants and conditions, both parties agree that
all terms and conditions set forth in the Option Agreement 2 remain unchanged
except the following:
1. Change the Customer Address from "2610 Orchard Parkway, San Jose, CA
95134-2020, USA" to "101 Innovation Drive, San Jose, CA 95134, USA" in the
introduction Paragraph and in Section 10, the Notice Section, of the Option
Agreement 2.
2. Replacement of Exhibit A, Capacity Factor Table, with the Exhibit A
attached hereto.
IN WITNESS WHEREOF, the parties have executed this Amendment to Option
Agreement 2 effective as of the Effective Date:
Taiwan Semiconductor Altera Corporation
Manufacturing Co., Ltd.
/s/ RON NORRIS BY: /s/ DENIS BERLEN
------------------ --------------------------
Ron Norris NAME: Denis Berlen
Sr. Vice President ------------------------
Worldwide Sales and Marketing TITLE: Chief Operating Officer
------------------------
Page 1 of 2
<PAGE> 2
EXHIBIT A
[*]
[*] CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY
WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT
TO THE OMITTED PORTIONS.
