MKS Instruments to Present at JP Morgan Technology Conference

WILMINGTON, Mass., May 16 /PRNewswire-FirstCall/ -- MKS Instruments, Inc. (Nasdaq: MKSI), a leading worldwide provider of process control technologies for semiconductor and other advanced manufacturing processes, announced that it will present at the JP Morgan Technology Conference in Boston on Monday, May 21, 2007 at 8:40 a.m. (Eastern Time). The presentation will be web cast live and will be available in the Investor Relations section of the company's website, http://www.mksinstruments.com, for one week.

MKS Instruments, Inc. is a leading worldwide provider of process control solutions for advanced manufacturing processes such as semiconductor device manufacturing; thin-film manufacturing for flat panel displays, data storage media, architectural glass and electro-optical products; and technology for medical imaging equipment. Our instruments, components and subsystems incorporate sophisticated technologies to power, measure, control, and monitor increasingly complex gas-related semiconductor manufacturing processes, thereby enhancing our customers' uptime, yield and throughput, and improving their productivity and return on invested capital.

SOURCE MKS Instruments, Inc.

CONTACT: Ron Weigner, Vice President & Chief Financial Officer of MKS Instruments, Inc., 1-978-284-4000
Web site: http://www.mksinstruments.com
(MKSI)