Hi; If during the etching process inside the chamber of ICP-RIE is hotter than critical temperature of resist, your resist be strong. Also you could not remove the resist. Maybe you can control the cooling water of your instrument. Or you can try to etch with short period(For example 3 minutes.) Other reason can be thickness of your resist. Tolga YELBOGA Project Engineer Nanotechnology Researh Center Bilkent University Bilkent, Ankara 06800 TURKEY Voice: 90-312-290-1020 http://www.nanointurkey.com http://www.nanotam.bilkent.edu.tr -----Original Message----- From: Satish Yeldandi [mailto:sathish.yeldandi@gmail.com] Sent: Tuesday, May 20, 2008 6:01 AM To: General MEMS discussion Subject: [mems-talk] PR removal after ICP RIE etching Hi! I have problem removing photo resist after using it as mask for ICP-RIE etching. I tried Acetone, Acetone+Sonication, PR stripper, Asher. Nothing is working. Did anyone face this problem before. If anyone has any solution for this problem please tell me. Thanks Satish