EL SEGUNDO, Calif.--(BUSINESS WIRE)--July 20, 2004--International Rectifier Corporation (NYSE:IRF), a world leader in power management technology, today announced that it has completed the acquisition of the specialty silicon epitaxial services business of ATMI, Inc. (Nasdaq:ATMI). The acquisition had been previously announced on June 29, 2004.

About International Rectifier

International Rectifier (NYSE:IRF) is a world leader in power management technology. IR's analog and mixed signal ICs, advanced circuit devices, integrated power systems and components enable high performance computing and reduce energy waste in motors, the world's single largest consumer of electricity. Leading manufacturers of computers, energy efficient appliances, lighting, automobiles, satellites, aircraft, and defense systems rely on IR's power management benchmarks to power their next generation products. For more information, go to www.irf.com.

CONTACT: International Rectifier Corporation
Investor Relations: Steve Harrison, 310-252-7731
Media Relations: Graham Robertson, 310-726-8512
Website: http://www.irf.com

SOURCE: International Rectifier Corporation