CCMP CMC Materials Inc

Cabot Microelectronics to Release Second Quarter Fiscal 2004 Financial Results on April 22 AURORA, Ill., April 12 /PRNewswire-FirstCall/ -- Cabot Microelectronics Corporation , the leading supplier of chemical mechanical planarization (CMP) polishing slurries to the semiconductor industry, today announced that it will release financial results for its second quarter of fiscal 2004, which ended March 31, 2004, on Thursday, April 22. The press release, which will be issued priorto the market opening and available in the Investor Relations section of the company's website at http://www.cabotcmp.com/ , will be followed by a conference call at 10:00 a.m. Eastern time, 9:00 a.m. Central time. William Noglows, Cabot Microelectronics' Chairman, President and CEO will host the call. The conference call will be available to all interested parties via webcast from its website at http://www.cabotcmp.com/ or by phone at 800-893-3008. Callers outside the U.S. can dial 706-634-5531. For those who cannot listen to the live broadcast, a replay will be available through May 6, 2004 by calling 800-642-1687 or 706-645-9291, access code 4711975 or via webcast at http://www.cabotcmp.com/ . A transcript of the formal comments made during the conference call will be available in the Investor Relations section of the company's website at http://www.cabotcmp.com/ . About Cabot Microelectronics Cabot Microelectronics, headquartered in Aurora, Illinois, is the leading supplier of CMP slurries for polishing various materials used in semiconductor manufacturing processes. 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. Cabot Microelectronics is traded on Nasdaq under the symbol CCMP. For more information on Cabot Microelectronics, visit our website at http://www.cabotcmp.com/ or call 630-499-2600. Contact: William S. Johnson Vice President and Chief Financial Officer Cabot Microelectronics Corporation 630-375-6631 DATASOURCE: Cabot Microelectronics Corporation CONTACT: William S. Johnson, Vice President and Chief Financial Officer of Cabot Microelectronics Corporation, +1-630-375-6631 Web site: http://www.cabotcmp.com/

Copyright