What is the character of the glass. If it is soda lime, it must be heated very uniformly or POW!!!. Which is why Corning developed pyrex about 100 years ago. If it is Borosilicate (pyrex) or quartz (vycor or similiar) then it should not be a problem. Gary -----Original Message----- From: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org]On Behalf Of Don Friedrich Sent: Wednesday, October 01, 2008 1:15 PM To: mems-talk@memsnet.org Subject: [mems-talk] OmniCoat baking question I am seeking a baking process for OmniCoat which is lower T and slower ramp than recommended by MicroChem. The recommended procedure of 200C for 1 minute breaks my glass wafers. I would appreciate knowing how others have baked OmniCoat at lower temperatures, such as 120C. Thank you. Don Friedrich JDSU - Advanced Optical Technologies