CMP Technologies Plant Fully Operational and Qualified by Multiple Customers

HSINCHU, Taiwan — July 29, 2008 — Rohm and Haas Electronic Materials (NYSE:ROH), CMP Technologies, a leader and innovator in chemical mechanical planarization (CMP) technology for the global semiconductor industry, today announced that it is increasing investments in its Asia-Pacific Pad Manufacturing Facility located in Hsinchu, Taiwan. The investment is aimed at accelerating the company’s capacity expansion to meet the growing demand for CMP pads from semiconductor manufacturing customers in Asia. Fully operational and in production since March 2007, the Hsinchu plant has been qualified by major logic and memory semiconductor customers in the region.

The Hsinchu Facility was designed to allow for multiple phased expansions to meet the future demands for both 200 mm and 300 mm CMP pad requirements in Asia. The pad finishing operations have been fully functional since March of 2007. Complete pad manufacturing, including casting operations for the advanced VisionPad™ platform and the IC1000™ AT pad series, will be operational in early 2009. The Hsinchu Facility also maintains a local inventory of finished pads to further support customers in the region.

“Our Hsinchu Facility offers world-class, high volume manufacturing capability for leading edge pad technology, including our newest VisionPad and IC1000 AT pads for the most advanced manufacturing nodes,” explained Sam Shoemaker, president of Rohm and Haas Electronic Materials, CMP Technologies. “The conversion to Hsinchu supply has been smooth and faster than originally anticipated. Customer qualifications of the facility are going extremely well, and we are well ahead of our original capacity expansion schedule.”

Cliff Chen, plant manager, Asia-Pacific Manufacturing Facility, added, “To keep pace with demand, our staff has grown faster than originally planned.  We expect to employ over 200 people in Taiwan by the end of this year. These jobs represent a strong mix of talented local personnel, ranging from manufacturing staff and product technicians to advanced CMP applications and technical service engineers. We fully expect that opportunities at the Hsinchu plant will continue to grow as we expand and transfer new technologies to this state-of-the-art facility.”

Rohm and Haas’s CMP Technologies business is one of the original suppliers of CMP consumables serving the semiconductor manufacturing industry since 1969. The company’s experience has enabled the development of a strong global infrastructure that delivers quality and consistency to customers worldwide. All of the company’s manufacturing facilities, including Hsinchu, are ISO 9001 certified, and adhere to Six-Sigma principles for all operations, including manufacturing, supply chain management, advanced research and development, CMP applications engineering, technical service and sales support.

About Rohm and Haas Electronic Materials
Rohm and Haas Electronic Materials develops and delivers innovative material solutions and processes to the electronic and optoelectronic industries. Focused on the circuit board, semiconductor manufacturing, advanced packaging, and display industries, its products and technologies are integral elements in electronic devices around the world. Additional information can be found at www.rohmhaas.com.

The CMP Technologies business has been a leader and innovator in polishing technology for the global semiconductor industry since 1969. CMP Technologies products include polishing pads, conditioners and slurries. CMP Technologies maintains operations throughout the world, including manufacturing facilities in Newark, Delaware, Hsinchu, Taiwan and in the Mie and Kyoto prefectures in Japan.

About Rohm and Haas Company
Leading the way since 1909, Rohm and Haas (NYSE:ROH) is a global pioneer in the creation and development of innovative technologies and solutions for the specialty materials industry. The company’s technologies are found in a wide range of industries including: Building and Construction, Electronics and Electronic Devices, Household Goods and Personal Care, Packaging and Paper, Transportation, Pharmaceutical and Medical, Water, Food and Food Related, and Industrial Process. Innovative Rohm and Haas technologies and solutions help to improve life every day, around the world. Based in Philadelphia, PA, the company generated annual sales of approximately $8.9 billion in 2007. Visit www.rohmhaas.com for more information. Imagine the possibilities™.

Forward Looking Statement

This release includes forward-looking statements. Actual results could vary materially, due to changes in current expectations. The forward-looking statements contained in this announcement concern new technologies, products, product performance, corporate plans and development and involve risks and uncertainties and are subject to change.