Amendment To Wafer Foundry Agreement

EXHIBIT 10.12.1


AMENDMENT

TO

SEMICONDUCTOR MANUFACTURING AGREEMENT


This Amendment serves to amend the Wafer Manufacturing Agreement (" Agreement" ) originally executed on or about May 1, 2002, by and between Advanced Analogic Technologies, Inc. (" CUSTOMER" ) and Hynix Semiconductor Inc, and Hynix Semiconductor America Inc. (" FOUNDRY" ). The parties hereby agree the below terms and conditions are added to and made a part of the Agreement, effective May 1, 2005:

WHEREAS, since the Effective Date of the Agreement, the Agreement has been assigned from FOUNDRY to MagnaChip Semiconductor Inc.

WHEREAS, the initial T ...