Cymer Inks Multi-Unit Light Source Agreement with Toshiba; Partnership Illustrates Growing XLR Technology Adoption Among Leading Chipmakers; Agreement Includes Cymer's By the Pulse Program and GLXTM Upgrade on Systems

Cymer, Inc. (Nasdaq: CYMI)/ Cymer Japan, Ltd.a, the world's leading supplier of light sources used in semiconductor lithography, announced today it has reached a significant multi-unit agreement with Toshiba. Under the agreement, Toshiba will include Cymer's krypton fluoride (KrF) and argon fluoride (ArF) light sources in Toshiba's future 300mm investment plan at its memory fab in Japan.

As a part of this agreement, Toshiba's new light sources and current installed systems will receive light source support through Cymer's By the Pulse Program. Toshiba will also benefit from the Cymer's Gas Lifetime eXtensionTM(GLX) control system which will come integrated on lasers, extending the gas refill interval from 100 million pulses to 2 billion pulses and enabling increased scanner output and availability. Toshiba is expected to achieve higher productivity and lower cost of operation for its existing and expanding Cymer installed base.

"This agreement symbolizes Cymer's strong commitment to Toshiba's business model and long-term success, as well as the rising adoption of our next-generation XLR technology among top global chipmakers," said Ed Brown, president and chief operating officer for Cymer. "We look forward to supporting Toshiba's aggressive productivity improvement objectives for years to come."

Released in July 2007, the prevalence of Cymer's XLR platform as the technology of choice for scanner and chipmaker customers has increased steadily in 2008. The XLR 500i systems to be selected by Toshiba will offer significant advances in performance, availability and extendibility, providing a path for Toshiba to attain high-volume production while lowering operating costs at the leading-edge of lithography. Additionally, the XLR 500i lasers feature Cymer's advanced bandwidth stabilization (ABS) technology, delivering superior bandwidth performance that achieves predictable and repeatable wafer-level process-control.

SEMICON West 2008 will be held July 15-17 at Moscone Center in San Francisco. To schedule a briefing with a Cymer executive, please contact Kelly Hamor at (619) 549-3473 or hamor@formulapr.com, or drop by booth No. 5357 in the North Hall.

aCymer Japan Ltd. is a subsidiary of Cymer, Inc.

Forward Looking Statements

Statements in this press release that are not strictly historical in nature are forward-looking statements. These statements include, but are not limited to references to growing adoption of Cymer's XLR technology by chipmakers; anticipated advances and benefits relating to Cymer's products and services; and Toshiba's anticipated purchases and benefits resulting from its agreement with Cymer. These statements are based only on current information and expectations that are inherently subject to change and involve a number of risks and uncertainties. Actual events or results may differ materially from those projected in these statements due to various factors, including but not limited to: the demand for semiconductors in general, and, in particular, for leading-edge devices with smaller geometries; cyclicality in the semiconductor equipment industry; rapid technological change; new and enhanced product offerings by competitors; delays or cancellations by customers of their orders; inability by the company to meet its production and/or product development schedules; inability of the company to secure adequate supplies of critical components for its advanced products. For a discussion of these and other factors which may cause our actual events or results to differ from those projected, please refer to the company's most recent annual report on Form 10-K and quarterly reports on Form 10-Q, as well as other subsequent filings with the Securities and Exchange Commission. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release. All forward-looking statements are qualified in their entirety by this cautionary statement, and the company undertakes no obligation to revise or update any forward-looking statements to reflect events or circumstances after the date of this press release.

About Cymer

Cymer, Inc., with more than two dozen global offices and company headquarters in San Diego, is the market leader in developing laser light sources, used by nearly every major chipmaker around the world as the essential light source for DUV lithography systems. Cymer's newly launched products enable double patterning in an effort to facilitate 32nm lithography and the company is also leading the industry in the research, development and transition to extreme ultra-violet lithography (EUV) sourced by laser-produced plasma. Cymer is committed to developing and introducing new technologies that reduce cost of ownership for chipmakers while simultaneously improving productivity. Additional information on Cymer may be found atwww.cymer.com.