Exhibit 99.1

    AMIS Holdings, Inc. Announces David Rickey's Plan to Resign as Director


    POCATELLO, Idaho--(BUSINESS WIRE)--Dec. 6, 2004--AMIS Holdings,
Inc. ("AMIS" or "Company") (Nasdaq:AMIS), parent company of AMI
Semiconductor, a leader in the design and manufacture of integrated
mixed-signal solutions, today announced that David Rickey has notified
the Company of his intention to resign as director in 2005 for
personal reasons. Mr. Rickey, who also recently announced his
intention to retire as Chief Executive and Chairman of Applied Micro
Circuits Corporation, joined the board of directors of the Company in
2001. The board of directors has commenced a search for his successor.
    "We've been honored to have Dave Rickey serve on our board of
directors," said Christine King, chief executive officer and president
of AMIS Holdings, Inc. "We look forward to his continued contribution
as a director while we look for his replacement."

    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,
mixed-signal foundry services 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. For more information,
please visit the AMIS Web site at www.amis.com.


    CONTACT: AMI Semiconductor, Pocatello
             Editorial Contact:
             Tamera Drake, 208-234-6890
             tamera_drake@amis.com
             or
             Investor Contact:
             Jimmie Hutchens, 208-234-6732
             jimmie_hutchens@amis.com