Cabot Microelectronics Corporation Receives Ruling From Federal Circuit Court of Appeals

Cabot Microelectronics Corporation (Nasdaq: CCMP) announced today that the validity of its tungsten patents remains upheld as the company's appeal in its patent enforcement action against DuPont Air Products NanoMaterials, LLC ("DANano") has been decided with the Federal Circuit Court of Appeals affirming proceedings at the District Court."We continue to be pleased that the validity of all of our CMP patents at issue in the appeal, which are core patents for tungsten CMP applications, was confirmed through this legal process. Although we are disappointed with the affirmation of the lower court's ruling regarding infringement, we view it as a narrow one that is not likely to fundamentally affect our leadership in tungsten CMP slurries, as it relates only to one aspect of the specific DA Nano products at issue in the case, and would not extend to other product variations," said H. Carol Bernstein, Cabot Microelectronics' Vice President, Secretary and General Counsel. "We remain committed to the protection of our significant investment in patent-protected research and development, which is evident in our many tungsten CMP products that are world-renowned and in continued high demand for their excellence with respect to technology, quality, supply assurance, and overall cost of ownership."