EXHIBIT 4.2 FIRST AMENDMENT TO RIGHTS AGREEMENT This Amendment is made and entered into as of the 16th day of May, 2001, by and between Integrated Measurement Systems, Inc. (the "Company") and Mellon Investor Services, L.L.C. (formerly ChaseMellon...Rights Agreement • May 18th, 2001 • Integrated Measurement Systems Inc /Or/ • Instruments for meas & testing of electricity & elec signals • Oregon
