Ashwini: We have used Fomblin synthetic oil in the past for these applications. Clean up afterwards is as easy as using Simple Green detergent followed by rinse and dry. Bob Henderson -----Original Message----- From: ashwini jambhalikarTo: mems-talk@memsnet.org Sent: Wed, 13 Jun 2007 9:39 pm Subject: [mems-talk] Drie support wafer Dear Friends, Can anybody suggest me a better option than cool grease, for through etching in DRIE The wafer to be through etched needs a support wafer, and I am always using cool grease in between the support wafer and the actual wafer to be etched. Cool grease removal is really a headache, it can break the delicate structures. I have heard about something like conducting tapes, which can be used instead of cool grease. if anybody knows about it or any other better option, please let me know...