Dear Colleagues, I am wondering how to etch deeply (150 um) in prexy glass without losing masking resist layer. Au has been used as a masking layer for shallow etching. But, is there any kind of adhesive promoters that would allow the photoresist to stand longer (1 hr) in the HF solution? I am also interested in the companies that could provide DRIE service for glass. Any info is highly appreciated. Thanks, harry _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com