CCMP CMC Materials Inc

Cabot Microelectronics Corporation (Nasdaq: CCMP), the world�s leading supplier of chemical mechanical planarization (CMP) slurries to the semiconductor industry, announced today that it is scheduled to present at the UBS Global Technology and Services Conference in New York, New York, at 10:30 a.m., Central Time on Wednesday, November 19, 2008. Forward looking and other material information may be discussed during the presentation. The presentation will be available to all interested parties via webcast from its site at www.cabotcmp.com. For those who cannot listen to the live broadcast, a copy of the presentation will be available in the Investor Relations section of the company�s website at www.cabotcmp.com. About Cabot Microelectronics Cabot Microelectronics Corporation (Nasdaq: CCMP), 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 800 employees on a global basis. The company is also leveraging its expertise in CMP slurry formulation, materials and polishing techniques developed for the semiconductor industry and applying it to demanding surface modification applications 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.