Hsinchu, Taiwan, November 15, 2004 - ChipMOS TECHNOLOGIES (Bermuda) LTD. ("ChipMOS" or "the Company") (Nasdaq: IMOS) announced that Mr. Jerome Chao-Jung Tsai was appointed to the Company's Board of Directors, replacing Mr. Min-Liang Chen, who resigned due to time constraints.

Mr. Tsai has served as a director of ChipMOS TECHNOLOGIES INC. ( "ChipMOS Taiwan" ), which is a 70% held subsidiary of the Company, from January 2001, as a representative of Siliconware Precision Industries Co., Ltd. ( "SPIL" ) (Nasdaq: SPIL), where he has been a supervisor since June 2002. He was previously president of Grand Cathay Securities Co., Ltd. and assistant vice president of China Trust Commercial Bank Co., Ltd. Mr. Tsai received his bachelor's degree in statistics from National Cheng Kung University and master's degree in management of technology from National Chiao Tung University.

Mr. Shih-Jye Cheng, Chairman and Chief Executive Officer of ChipMOS, said, "Mr. Chen has been an active contributor on our Board and we have all benefited from his insight. We respect his decision and welcome Mr. Tsai as a member of our Board given his qualifications and experience."

About ChipMOS TECHNOLOGIES (Bermuda) LTD.: ChipMOS (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.