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Cabot Microelectronics Announces a Major Improvement in Copper Barrier CMP Technology with its B6600 Series of CMP Slurries for Low K Devices

AURORA, Ill.--(BUSINESS WIRE)--July 9, 2007--Cabot Microelectronics Corporation (NASDAQ:CCMP), the world's leading supplier of chemical mechanical planarization (CMP) polishing slurries to the semiconductor industry, announces a major breakthrough in its CMP technology with improvements to its B6600 platform of barrier CMP slurries for advanced technology nodes.

Cabot Microelectronics is the leading supplier of copper polishing slurry solutions for the semiconductor industry. The B6600 barrier slurry platform builds on Cabot Microelectronics' industry-leading CMP slurry technology and is the result of extensive research and development by Cabot Microelectronics intended to deliver an integrated, best-in-class solution for copper barrier CMP at advanced technology nodes.

Cabot Microelectronics' B6600 barrier slurry platform is tunable, enabling the products to be easily customized to deliver excellent planarity and defect performance across a wide range of integration schemes. Recent technology advancements made by Cabot Microelectronics' scientists provide excellent low-K dielectric and copper removal rate control, resulting in superior electrical performance. The B6600 barrier slurry products are being produced and used worldwide for technology nodes from 90 nm through 45 nm.

Thomas Kelly, Cabot Microelectronics' Global Business Director for Copper and Barrier products, stated, "Our new line of advanced barrier slurry products is designed to provide customers with greatly enhanced flexibility to customize and fit their specific processes. Further, the B6600 platform of products offers customers electrical performance that is unmatched in the market with an attractive cost of ownership."

ABOUT CABOT MICROELECTRONICS CORPORATION

Cabot Microelectronics Corporation, headquartered in Aurora, Illinois, is the world's leading supplier of CMP slurries used in semiconductor and data storage manufacturing. 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. Since becoming an independent public company in 2000, the company has grown to approximately 750 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 vision is to become the world leader in shaping, enabling and enhancing the performance of surfaces. The company is leveraging its expertise in CMP slurry formulation, materials and polishing techniques developed for the semiconductor industry and applying it to demanding surface modification applications in other industries where shaping, enabling and enhancing the performance of surfaces is critical to success. For more information about Cabot Microelectronics Corporation, visit www.cabotcmp.com or contact Amy Ford, Director of Investor Relations, at 630-499-2600.

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 or trends; growth of the markets in which the company participates; international events; product performance; the generation, protection and acquisition of intellectual property, and litigation related to such intellectual property; new product introductions; development of new products, technologies and markets; the acquisition of or investment in other entities; and the construction of new or refurbishment of existing facilities by Cabot Microelectronics Corporation. 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 actual results to differ materially from those described by these forward-looking statements. In particular, see "Risk Factors" in the company's quarterly report on Form 10-Q for the quarter ended March 31, 2007 and in the company's annual report on Form 10-K for the fiscal year ended September 30, 2006, both filed with the SEC. Cabot Microelectronics assumes no obligation to update this forward-looking information.

CONTACT: Cabot Microelectronics Corporation
Amy Ford, Director of Investor Relations, 630-499-2600

SOURCE: Cabot Microelectronics Corporation

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