ESI Declares Quarterly Dividend

Electro Scientific Industries, Inc. (Nasdaq:ESIO), a leading supplier of innovative laser-based manufacturing solutions for the microtechnology industry, today announced that its board of directors declared a quarterly cash dividend of $0.08 per share. The dividend is payable September 10, 2012 to shareholders of record as of the close of business on August 24, 2012.

About ESI, Inc.

ESI is a leading supplier of innovative, laser-based manufacturing solutions for the microtechnology industry. Our systems enable precise structuring and testing of micron to submicron features in electronic devices, semiconductors, LEDs and other high-value components. We partner with our customers to make breakthrough technologies possible in the microelectronics, semiconductor and other emerging industries. Founded in 1944, ESI is headquartered in Portland, Ore., with global operations from the Pacific Northwest to the Pacific Rim. More information is available at www.esi.com.