Oct 15, 2003

ChipMOS Taiwan Signs Assembly and Testing Agreement with ProMOS Technologies

ChipMOS Taiwan Signs Assembly and Testing Agreement with ProMOS Technologies Hsinchu, Taiwan, Oct. 14, 2003 - ChipMOS TECHNOLOGIES (Bermuda) LTD. (Nasdaq: IMOS) ("ChipMOS Bermuda") today announced that its 70% owned subsidiary, ChipMOS TECHNOLOGIES INC. ("ChipMOS"), signed agreement with ProMOS Technologies Inc. ("ProMOS") to guarantee its future capacity supply of memory IC assembly and testing services to ProMOS. The agreement provides the guarantee period of 3 years and 6 months.

The memory IC testing services provided to ProMOS is mainly for commodity DRAMs, which include 128Mb/256Mb SDRAM and DDR SDRAM, employing ChipMOS's existing T5585/T5581 Advantest testing equipments. These ICs will be packaged by using ChipMOS's TSOP and FBGA (Fine-Pitch Ball Grid Array) package solutions. The end use of these ICs is mainly data processing and computing. Through this agreement, ProMOS will not only ease the tension of packaging and testing capacity supply shortage but also take a further step of reaching the goal of expanding tier one market share.

S.J. Cheng, deputy chairman and chief executive officer of ChipMOS Bermuda, said, " ProMOS is one of the global leading memory makers. It is our pleasure to have a partner like them. ChipMOS is committed to providing advanced technology and prompt services to help ProMOS accomplish its future success."

About ProMOS Technologies Inc.

ProMOS Technologies was founded in December1996. It manufactures high-performance and high-density commodity DRAMs and other niche memory products, including pseudo-SRAM and low power SDRAM. ProMOS applies the leading-edge technologies for advanced memory products and is noted in global DRAM industry for its outstanding performance in manufacturing excellence and technology advancement. Its 12-inch (300 mm) fab is one of the world's leading 12-inch DRAM fabs in volume production.

About ChipMOS TECHNOLOGIES (Bermuda) LTD.

ChipMOS/Bermuda is a leading provider of semiconductor testing and assembly services to customers in Taiwan, Japan and the U.S. With advanced facilities in the Hsinchu and Tainan Science-Based Industrial Parks in Taiwan, ChipMOS/Bermuda 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. For more information, please visit its company website at http://www.chipmos.com.tw