Exhibit 99.1

                  AMIS Holdings, Inc. Announces the Retirement
                  of Chief Operating Officer, Walter Mattheus

    POCATELLO, Idaho--(BUSINESS WIRE)--July 10, 2006--AMIS Holdings,
Inc. (NASDAQ: AMIS), parent company of AMI Semiconductor (the
Company), a leader in the design and manufacture of integrated
mixed-signal solutions, today announced the retirement of Walter
Mattheus, Senior Vice President and Chief Operating Officer effective
July 21, 2006. "Walter has made a tremendous contribution to our
company," stated Christine King, President and Chief Executive
Officer. "He has built a talented, capable and motivated operations
organization," continued King. "While I will miss his counsel and
leadership, I congratulate him on his well-deserved retirement."
    Mattheus will continue in his current role until his retirement
date. He leaves the company's manufacturing operations in the capable
hands of an experienced leadership team. An update will be provided in
conjunction with the Company's second quarter earnings release.

    About AMI Semiconductor

    AMI Semiconductor (AMIS) is a leader in the design and manufacture
of silicon solutions for the real world. As a widely recognized
innovator in state-of-the-art integrated mixed-signal products and
structured digital products, AMIS is committed to providing customers
with the optimal value, quickest time-to-market semiconductor
solutions. Offering unparalleled manufacturing flexibility and
dedication to customer service, AMI Semiconductor operates globally
with headquarters in Pocatello, Idaho, European corporate offices in
Oudenaarde, Belgium, and a network of sales and design centers located
in the key markets of the United States, Europe and the Asia Pacific
region.

    CONTACT: AMI Semiconductor
             Investor Relations:
             Wade Olsen, 208-234-6045
             wade_olsen@amis.com
             or
             Media Relations:
             Tamera Drake, 208-234-6890
             tamera_drake@amis.com