Exhibit 99.1

Richard Faubert Elected to ESI's Board of Directors

    PORTLAND, Ore.--(BUSINESS WIRE)--June 23, 2003--Electro Scientific
Industries, Inc. (Nasdaq:ESIOE) announced today that Richard J.
Faubert has been elected to the company's board of directors.
    Mr. Faubert serves as a director of Radisys Corp. and is on the
North American Advisory Board of Semiconductor Equipment and Materials
Inc. (SEMI). Beginning in 1998, Mr. Faubert was president, CEO and a
member of the board of SpeedFam-IPEC. Upon the sale of SpeedFam-IPEC
to Novellus Systems he served as executive vice president of Novellus
until his departure in April 2003. Prior to that, Mr. Faubert held
executive and management positions at Tektronix, Inc. and GenRad, Inc.
    "We are delighted to have Richie join ESI's board," said Jon
Tompkins, chairman of the board of directors of ESI. "He has
considerable semiconductor and electronic capital equipment operating
management experience and is a great addition to our board."
    "I am excited to join the ESI board," said Mr. Faubert. "They have
impressive technology, strong market positions and great potential."

    About ESI

    ESI, headquartered in Portland, Oregon, supplies high-value,
high-technology manufacturing equipment to the global electronics
market. Using its expertise in laser/material interaction, small parts
handling, machine vision and real-time control systems, the company
enables the production of leading-edge products for customers in the
semiconductor, passive component and electronic interconnect markets.
ESI's web site is http://www.esi.com.

    CONTACT: Electro Scientific Industries, Inc.
             Joe Reinhart, 503/671-5500