Tosoh Corporation: The Chemistry of Innovation

Tokyo, Japan - Tosoh Corporation announced today the reorganization of its 'Specialty Materials & Electronics Products' and 'Quartz Products' Divisions into the newly formed Electronic Materials Division (TEMD), effective as of June 27, 2003 headed by Shinji Kurata as President. Through this reorganization, Tosoh Corporation brings its broad range of materials expertise to bear on the development of new products and solutions for semiconductor, flat panel display and materials markets worldwide.

The new Electronic Materials Division will consist of two businesses: Quartz and Thin Film Materials. The Quartz business provides many different types of synthetic and natural silica glass materials and products manufactured by Tosoh SGM, and fabricated quartzware manufactured by the Tosoh Quartz companies. All affiliated quartz fabrication companies were unified in 2001 under the Tosoh Quartz name. This unification made it possible to provide our global customer base with uniform high-quality products and services.

The Thin Film Materials business includes the manufacture and sale of a wide range of high purity deposition materials and accessories for the semiconductor, flat-panel, and other related markets and encompasses the global Tosoh SMD network, Tosoh SMC (Speciality Materials Corporation) in Japan, and Tosoh SET, Inc., in the United States. Tosoh SMD and Tosoh SMC manufacture and market PVD* and CVD* deposition materials to the global semiconductor, flat panel, and specialty markets. Tosoh SET provides PVD, CVD, etch and CMP* Process Kit Management(TM) services for the semiconductor industry.

Through constant innovation made possible by Tosoh's formidable development capability, Tosoh Electronics Materials Division will provide the materials to enable the technologies of the future.

Main subsidiaries in the Electronic Materials Division

Thin film deposition materials and services:
Tosoh SMD, Inc. (U.S.A.)
Tosoh SMD, Korea, Ltd. (Korea)
Tosoh SMD, Taiwan, Ltd. (Taiwan)
Tosoh Speciality Materials Corporation (Japan)
Tosoh SET, Inc. (U.S.A.)
Tosoh Europe BV (Europe - U.K. and Germany) (shared resource)
Tosoh Singapore Pte. Ltd. (Singapore) (shared resource)

Fabricated quartzware:
Tosoh Quartz, Inc. (U.S.A.)
Tosoh Quartz Ltd. (U.K.)
Tosoh Quartz Co. Ltd. (Taiwan)
Tosoh Quartz Corporation (Japan)

Silica glass materials:
Tosoh SGM Corporation (Japan)
Tosoh SGM USA, Inc. (U.S.A)

For more information on Tosoh companies that service semiconductor and flat panel display equipment and materials markets, contact Tosoh SMD at www.tosohsmd.com, Tosoh Quartz at www.tosohquartz.com, and Tosoh SET at www.tosohset.com. A complete listing of all Tosoh group affiliates can be found at www.tosoh.com.

Tosoh Corporation
Headquartered in Tokyo, Japan, Tosoh Corporation is a diversified global chemical and specialty materials company. Founded in 1935, the Company has expanded its reach into high value-added businesses such as fine chemicals, scientific instrumentation, thin film materials, and quartzware. Tosoh is a multi-billion dollar corporation that employs more than 9,000 people worldwide and is listed on the Tokyo and Osaka Stock Exchanges.

Stock Exchange Ticker Symbol: 4042

For more information, please contact:
International Public Relations
Tosoh Corporation
Michael Hoover
m_hoover@tosoh.co.jp
Tel: +81-3-5427-5118
Fax: +81-3-5427-5198
www.tosoh.com

Disclaimer
This document contains forward-looking statements, including without limitation, statements concerning product development, objectives, goals, and commercial introduction, which involve certain risks and uncertainties. The forward-looking statements are also identified through use of the words "anticipates," "plans," "expects," and other words of similar meaning. Actual results may differ significantly from the expectations contained in the forward-looking statements.