CCMP CMC Materials Inc

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 been awarded SMIC�s Excellent Supplier Award. SMIC selected Cabot Microelectronics in recognition and appreciation of its long-term partnership and support of SMIC in the areas of quality, supply assurance, performance and cost. The ability to expand with SMIC�s growing business in China was also crucial to the supplier award. The company supplies SMIC with CMP polishing slurries for Copper, Tungsten, and Dielectrics applications. Cabot Microelectronics and 14 other material supplier award winners were presented the award in Shanghai on July 9 during SMIC�s key supplier week. �We are honored to have earned this award from such an important customer,� stated William Noglows, Chairman and CEO of Cabot Microelectronics Corporation. �Our commitment to technology leadership, operations excellence and connecting with our customers is steadfast, and with continued success in these areas we will be well positioned to continue to build on our strong relationship with SMIC.� 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.