Are the pH's for these concentrations in the literature? If so, can you provide a link? Thank you. Thomas -----Original Message----- From: mems-talk-bounces+wilsont=marshall.edu@memsnet.org [mailto:mems-talk- bounces+wilsont=marshall.edu@memsnet.org] On Behalf Of Ruiz, Marcos Daniel (SENCOE) Sent: Wednesday, June 08, 2011 1:42 PM To: General MEMS discussion Subject: Re: [mems-talk] Controlled, slow and smooth glass etching Buffered Oxide Etch is available in several concentrations (we use 50:1, 10:1, 6:1 BOE) Dan Ruiz