Alex, The following publication may help you to give a lead to search more : "A Study of Undercutting Characteristics in the TMAH - IPA System" A Merlos. M C Acero, M H Bao. J Bausells and J Eteve J. Micromech. Microeng, 2(1992) 181 - 183 Ami Chand Physics Department, University of California, Santa Barbara CA 93106, USA Tel : 805 - 893 - 3999 Fax : 805 - 893 -8315 On Mon, 14 Jul 1997, Alex Jovel wrote: > Hi, I'm looking for information on silicon etching using TMAH. Does anybody know where I could find such info. Thanks. > > > --- > Alex Jovel > jovel@tanner.com > > >