May 26, 2006

CHIPMOS ANNOUNCES PRICING OF PUBLIC OFFERING BY MOSEL

HSINCHU, Taiwan, May 26, 2006 -- ChipMOS TECHNOLOGIES (Bermuda) LTD. ("ChipMOS" or the "Company") (Nasdaq: IMOS) announced today the pricing of the public offering of 6,956,522 of its common shares by its majority shareholder, Mosel Vitelic Inc. ("Mosel"), through Mosel's wholly-owned subsidiary, Giant Haven Investments Limited, at US$6.00 per share. The common shares sold in the offering were all secondary shares; no new primary shares were issued in the offering. An additional 1,043,478 common shares may be sold in the offering by Mosel pursuant to a 30-day option granted to the underwriter to cover over-allotments. ChipMOS will neither sell any securities nor receive any proceeds in the offering.

Deutsche Bank Securities Inc. is acting as sole manager of the offering. Copies of the final prospectus supplement relating to the offering may be obtained from Deutsche Bank Securities Inc., 60 Wall Street, 4th Floor, New York, NY 10005 or from the SEC's Web site at http://www.sec.gov/.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of these securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.

About ChipMOS TECHNOLOGIES (Bermuda) LTD.:

ChipMOS ( http://www.chipmos.com.tw/ ) is a leading independent provider of semiconductor testing and assembly services to customers in Taiwan, Japan, and the U.S. With advanced facilities in Hsinchu and Southern Taiwan Science Parks in Taiwan and Shanghai, ChipMOS and its subsidiaries provide testing and assembly services to a broad range of customers, including leading fabless semiconductor companies, integrated device manufacturers and independent semiconductor foundries.

Forward-Looking Statements

Certain statements contained in this announcement may be viewed as "forward-looking statements" within the meaning of Section 27A of the U.S. Securities Act of 1933, as amended, and Section 21E of the U.S. Securities Exchange Act of 1934, as amended. Such forward-looking statements involve known and unknown risks, uncertainties and other factors, which may cause the actual performance, financial condition or results of operations of the Company to be materially different from any future performance, financial condition or results of operations implied by such forward-looking statements. Further information regarding these risks, uncertainties and other factors is included in the Company's most recent Annual Report on Form 20-F filed with the U.S. Securities and Exchange Commission (the "SEC") and in the Company's other filings with the SEC.

Contact:

In Taiwan R.O.C.
Dr. S.K. Chen
ChipMOS TECHNOLOGIES (Bermuda) LTD.
Tel: +886-6-507-7712
Email: s.k._chen@chipmos.com.tw

In the U.S.
David Pasquale
The Ruth Group
Tel: +1-646-536-7006
Email: dpasquale@theruthgroup.com