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Cabot Microelectronics Announces Acquisition Of CMP Slurry Patents From IBM

AURORA, Ill.--(BUSINESS WIRE)--July 5, 2006--Cabot Microelectronics Corporation (Nasdaq: CCMP), the world's leading supplier of chemical mechanical planarization (CMP) polishing slurries to the semiconductor industry, announced today that it has entered into a patent assignment agreement with the International Business Machines Corp. ("IBM"). Under the terms of the agreement, the company has acquired a number of patents and associated rights relating to CMP slurry technology from IBM, including various applications such as copper, copper barrier, tungsten, and dielectrics, among others.

"As the technology leader in CMP slurries, we are delighted to have acquired these patents from IBM. We believe these technology rights will enhance our competitive advantage and expand our already substantial intellectual property portfolio," stated William P. Noglows, Cabot Microelectronics' Chairman and Chief Executive Officer. "For almost twenty years, since the early days of CMP technology, we have had a productive and collaborative relationship with IBM as an important customer, and we believe that this acquisition of CMP slurry patents reflects and furthers this positive relationship and our ability to bring value to all of our customers."

About Cabot Microelectronics

Cabot Microelectronics Corporation, headquartered in Aurora, Illinois, is the world's leading supplier of CMP slurries used in semiconductor and data storage manufacturing. Since becoming an independent public company in 2000, the company has grown to approximately 650 employees who work at research and development labs, sales and business offices, manufacturing facilities and customer service centers in China, France, Germany, Japan, Singapore, South Korea, Taiwan, the United Kingdom and the United States. The company's products play a critical role in the production of the most advanced semiconductor devices, enabling the manufacture of smaller, faster and more complex devices by its customers. In addition to its core CMP business, the company's vision looks beyond the semiconductor industry to become the world leader in shaping, enabling and enhancing the performance of surfaces. For more information about Cabot Microelectronics Corporation, visit www.cabotcmp.com or contact Barbara Ven Horst, Director of Investor Relations at (630) 375-5412.

Safe Harbor Statement: This news release may include statements that constitute "forward-looking statements" within the meaning of federal securities regulations. These forward-looking statements include statements related to future sales and operating results, company and industry growth and trends, growth of this market, international events, product performance, the generation, acquisition and protection of intellectual property, new product introductions and development of new products and technologies by Cabot Microelectronics. These forward-looking statements involve a number of risks, uncertainties, and other factors, including those described from time to time in Cabot Microelectronics' filings with the Securities and Exchange Commission (SEC), that could cause the actual results to differ materially from those described by these forward-looking statements. In particular, see "Risks Relating to Our Business" in Management's Discussion and Analysis in our quarterly report on Form 10-Q for the quarter ended March 31, 2006, and our Annual Report on Form 10-K for the fiscal year ended September 30, 2005, both filed with the SEC. Cabot Microelectronics Corporation assumes no obligation to update this forward-looking information.

CONTACT: Cabot Microelectronics Corporation
Barbara Ven Horst, 630-375-5412
www.cabotcmp.com

SOURCE: Cabot Microelectronics Corporation

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