FOR IMMEDIATE RELEASE Company Contact: Judy Dale Sr. Director, Marketing Communications Credence Systems Corporation 510.492.3118 or 510.623.2524 fax E-mail: judy_dale@credence.com Press Release Agency Contact: Patricia MacLeod Sr. Account Executive, Public Relations e21 Corp 510.226.6780 ext. 205 or 510.226.9902 fax E-mail: patricia_macleod@e21corp.com Amkor Orders Multiple Wireless Test Systems from Credence FREMONT, Calif., July 16, 2003 ––– Credence Systems Corporation (Nasdaq: CMOS), a leading provider of solutions from design-to-production test for the worldwide semiconductor industry, today announced that Amkor Technology Inc. (Nasdaq: AMKR), the world’s largest contract semiconductor assembly and test services company, has issued a purchase order for multiple ASL 3000RFTM test systems to be delivered over the next six months. Amkor selected the ASL 3000RF based on its ability to accurately test a wide variety of wireless devices, including those used in 802.11 wireless local area networking (WLAN), code division multiple access (CDMA) and global system for mobile communication (GSM) standards. Amkor will utilize the systems for engineering development tasks and volume manufacturing of wireless chipsets. According to the market research group In-Stat/MDR, approximately 33 million WLAN chipsets are forecast to be sold in 2003, with over 94 million units to be sold by 2007. Driving this growth is strong consumer demand for more advanced networking capabilities for familiar devices such as cellular handsets and laptop computers. Semiconductor manufacturers are addressing this demand by producing chipsets with more sophisticated wireless functionality and applications. The increased functionality, coupled with a move toward a lower average selling price (ASP), has magnified the importance of cost-effective test solutions that provide the performance capabilities to address higher bandwidths and new communications standards. The ASL 3000RF features the industry’s most advanced RF instrumentation, including Credence’s patented modulated vector network analysis (MVNATM) technology. MVNA creates a test scenario that more closely resembles a device’s end-use environment and provides significantly better accuracy for Amkor’s wireless applications. Additionally, the ASL 3000RF features a flexible and scaleable architecture that provides Amkor with the ability to extend and upgrade the system with analog, digital, and enhanced RF instrumentation to address emerging wireless devices and applications as required. “Amkor is committed to offering our customers the greatest possible value for test services,” said Joe Holt, Amkor’s senior vice president of worldwide test. “We selected the Credence ASL 3000RF because it will enable our experienced RF test engineers and operations staff to provide the low-cost RF test solutions our customers need to grow their businesses. To complement our efforts, Credence has an experienced staff of applications and field service personnel that are committed to working with us at every step to assure smooth product introductions and efficient volume production.” With four RF test development facilities (two in the US and two in Asia) and six test production locations (five in Asia and one in the US), Amkor has the ability to offer development, qualification, wafer probe, final test, finished goods inventory and drop shipment services almost anywhere customers need them. “As demand and orders continue to rise for advanced RFICs, Amkor was looking to maintain its leadership position by enhancing its wireless test capabilities and capacity,” said Dr. Graham Siddall, Credence’s chairman and chief executive officer. “By selecting our ASL 3000RF system, Amkor can offer customers a leading wireless test system proven to compress test times by up to forty percent. The ASL 3000RF offers both RF and mixedsignal instrumentation on a single platform to help Amkor improve system utilization and reduce their capital investment in test equipment.” About ASL 30000RF Credence’s ASL 3000RF is a high-performance, mixed-signal, radio-frequency integrated circuit (RFIC) test system for wideband, wireless communications devices. Featuring the industry’s most advanced RF instrumentation, the ASL 3000RF is designed to meet the increasingly complex test requirements of a new generation of RFICs for wireless applications, including 802.11 wireless local area networking (WLAN) standards, and 3G mobile communications services. The ASL 3000RF incorporates advanced capabilities, including Credence’s patented MVNA technology. The system features a flexible, scaleable architecture that provides a cost-effective way to easily extend and upgrade the system with analog, digital, and enhanced RF test capabilities to meet emerging wireless requirements. About MVNA Credence’s MVNA technology is the industry’s first major technology breakthrough development in S-parameter measurements in thirty years. For many RF and microwave engineers, the measurement of S-parameters remains a fundamental method of characterizing high-frequency devices, but the use of continuous wave signals to take these measurements leads to complications in leading-edge wireless applications. MVNA technology allows these measurements to be made with wideband, digitally modulated signals, creating a test scenario that more closely resembles a device’s end-use environment and provides significantly better accuracy for wireless applications. This improved accuracy enables engineers to reduce guardbands in production, leading to higher device yield and faster time-to-profit. About Amkor Technology Amkor Technology, Inc. is the world's largest provider of contract semiconductor assembly and test services. The company offers semiconductor companies and electronics OEMs a complete set of microelectronic design and manufacturing services. More information on Amkor is available from the company's SEC filings and on Amkor's web site: www.amkor.com. About Credence Credence Systems Corporation (Nasdaq: CMOS) is changing the future of semiconductor production by integrating test solutions throughout the design, validation and production processes. A leader in the manufacture of automatic test equipment (ATE) for the global semiconductor industry, Credence offers a wide range of systems for the test of analog, digital, non-volatile memory, mixed-signal, SoC, and wireless semiconductor devices typical in today’s automobile, portable computing, consumer and communications products. Credence and its subsidiaries also provide test program development and debug software, engineering validation test solutions, and advanced photon probing technology that enable faster time-to-market with lower total cost-of-test. Headquartered in Fremont, California, the Company is an ISO 9001 certified manufacturer and maintains advanced production and design facilities in Hillsboro, Oregon. More information is available at http://www.credence.com. Forward-Looking Statements This release may contain statements that are forward looking and involve known and unknown risks and uncertainties that may cause the Company's actual results in future periods to be materially different from the future performance suggested in this release. Such factors include, but are not limited to, cyclicality and downturns in the semiconductor industry, which the company is experiencing, rapid technological change in the ATE market, the Company's ability to successfully integrate acquisitions, economic and political instability in the Asia Pacific and Middle East regions, fluctuation in customer demand, timing and volume of orders and shipments, competition and pricing pressures, reliability and quality issues, the Company's ability to complete the development and commercialization of its new products, product mix, overhead absorption, continued dependence on "turns" orders to achieve revenue objectives, the timing of new technology, product introductions, intellectual property issues, the risk of early obsolescence and the Company's ability to control and reduce expenses (including the ability to identify and successfully institute additional cost- saving measures). Further, the Company operates in an industry sector where securities values are highly volatile and may be influenced by economic and other factors beyond the Company's control. Reference is made to the discussion of risk factors detailed in the Company's filings with the Securities and Exchange Commission, including its reports on Form 10-K and 10-Q. Any projections in this release are based on limited information currently available to the Company, which is subject to change. Although any such projections and the factors influencing them will likely change, the Company will not necessarily update the information, since the Company is only to provide guidance at certain points during the year. Actual events or results could differ materially and no reader of this release should assume later in the quarter that the information provided today is still valid. Such information speaks only as of the date of this release. ### Credence is a registered trademark, and Credence Systems, ASL Series, ASL 3000RF, and MVNA are trademarks, of Credence Systems Corporation. Other trademarks that may be mentioned in this release are the intellectual property of their respective owners.