EXHIBIT 4.6



     Extension of the BGA IMMUNITY AGREEMENT entered into October 18, 1996
           between Motorola, Inc. and ST Assembly Test Services, Ltd.



Motorola Inc. and ST Assembly Services, Ltd. agree to extend the term of
above-identified IMMUNITY AGREEMENT for an extension period from January 1, 2003
until March 31, 2003.

Any royalty payments due Motorola Inc. by ST Assembly Test Services, Ltd. during
the extension period will be calculated at a royalty rate offered under the
terms of a renewed IMMUNITY AGREEMENT made between Motorola and ST Assembly
Services, Ltd.

All other terms and condition of the above-identified IMMUNITY AGREEMENT remain
the same.

Indicating their agreement to the foregoing, the parties have hereto executed
this extension of the above-identified IMMUNITY AGREEMENT in duplicate.



Motorola, Inc.                              ST Assembly Test Services, Ltd.

By     :   /s/ Paul Riedy                   By      :   /s/ Linda Nai
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Title  :   Director, IP Licensing           Title   :   Director, Legal
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Date   :   1/2/03                           Date    :   December 23, 2002
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