Sunnyvale, Calif., June 21, 2005 – ReVera Incorporated today announced that Dr. Graham J. Siddall, Executive Chairman of the Board of Credence Systems Corporation has been appointed to its Board of Directors. ReVera is a leading provider of advanced compositional metrology solutions for semiconductor device manufacturing.

“We are very excited to have someone with Dr. Siddall’s background and experience join ReVera’s Board of Directors,” said Dave Ring, President and CEO of ReVera Inc. “His knowledge of the semiconductor capital equipment market and specifically, the semiconductor metrology space, makes him an ideal fit for our Board. Graham has a track record of developing successful metrology and inspection companies, and we expect to benefit from this experience as we continue to strengthen our position as the leading supplier of compositional metrology tools.”

Dr. Siddall has served as Chairman of the Board of Directors of Credence since January 2005. From 2001 until January 2005, Dr. Siddall served as both the Chairman of the Board and Chief Executive Officer of Credence. Prior to joining Credence as Chief Executive Officer in 1999, Dr. Siddall was an Executive Vice President of KLA-Tencor Corporation, a leading supplier of process control and yield management equipment for the semiconductor industry. Prior to the merger of Tencor Instruments and KLA Instruments, Dr. Siddall served as Chief Operating Officer and Executive Vice President of Tencor Instruments. He has served as Vice President of Research, Development and Engineering at GCA Corporation, in addition to various senior management positions at Hewlett-Packard Laboratories, W.W. Hansen Laboratory of Physics at Stanford University and Rank Taylor Hobson in the UK. Dr. Siddall is a past president of the American Society for Precision Engineering and has recently been appointed Honorary Professor at NCUT (Northern China University of Technology) in Beijing.