Hello, Does anyone know the recipe of Au etchant or the product name for Au etchant? I have Au/Cr deposited pyrex glass wafer. now I don't have Au etchant. Au etchant should not attack Cr layer or interface of Cr/glass since Au/Cr would be window for glass isotropic etching in BOE. thanks, SangHwui Lee Ph.D candidate/MSE/NJIT Microelectronics Research Center(MRC) 973-596-6368(O) 201-242-1486(H) _________________________________________________________________ MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*. http://join.msn.com/?page=features/virus