Cabot MMD Appoints New Chief Financial Officer And Director of Global Quality; Industry veterans bring nearly 70 years of combined experience to support division's growing business.

AURORA, Ill.--(BUSINESS WIRE)--March 30, 1999--Cabot Corporation's Microelectronics Materials Division (MMD), the leading global supplier of chemical mechanical planarization (CMP) slurries, today announced two high-level appointments. William "Mack" McCarthy has been appointed to the newly created position of chief financial officer (CFO), and Bill Williams has been named director of global quality. Together, they bring a total of nearly 70 years of financial and management experience in the semiconductor and aerospace industries.

According to Matthew Neville, Cabot MMD's vice president and general manager, "Mack and Bill are playing a pivotal role in enhancing our business. As we continue to strategically expand our infrastructure to meet our customers' evolving needs, we are also augmenting our management team with highly qualified individuals such as Mack and Bill to help evolve our business. They bring valuable industry experience to Cabot, and we are fortunate to have them on our team."

Other recent, key appointments to Cabot MMD's executive team include Jeremy Jones, who was named director of the division's emerging polishing pad business, and Paul Feeney, who was appointed program manager of Cabot's dielectric business.

In his new role as CFO, McCarthy provides financial leadership and strategic direction for Cabot MMD. He is responsible for developing and implementing financial and business strategies to guide the continued growth of the division.

McCarthy comes to Cabot MMD from Texas Instruments (TI), Dallas, Texas, where he held various positions for the last 23 years, most recently as controller in TI's Corporate Services division. For 12 years, he was also a member of the Strategic Leadership Team of TI's Defense Systems and Electronics Group. Prior to joining TI, McCarthy spent 12 years at LTV Electro Systems (now E-Systems, Inc.), Greenville, Texas, where he held several positions, including assistant program manager. McCarthy received an MBA in finance and a bachelor's degree in general business from Texas A&M University.

As director of global quality, Williams is responsible for leading the division's quality and environmental, health and safety functions. He supports Cabot MMD's global operations, driving continuous improvement and focusing on quality systems.

Williams joins Cabot MMD after spending 35 years with Dexter Aerospace Materials Division, Pittsburg, Calif., where he had a key role in its quality organization as well as various positions in marketing and operations. Williams earned a bachelor's degree in mechanical engineering from the California State University at Fresno.

About Cabot MMD: Cabot Corp. Microelectronics Materials Division (www.cabot-corp.com/mmd), Aurora, Ill., is the leading global supplier of CMP slurries for polishing oxide, tungsten, copper and aluminum used in semiconductor manufacturing processes. Cabot MMD is a division of Cabot Corp. (www.cabot-corp.com). Headquartered in Boston, Mass., Cabot Corp. is a global performance materials company that specializes in the manufacture of fine particles for the automotive, industrial, construction, semiconductor, coatings, inks and energy markets. Cabot Corp. had revenues of $1.67 billion in 1998. Its common stock is traded on the New York Stock Exchange under the symbol CBT.