Teimour, Teflon AF should not actually be soluble in IPA. However, depending on method of use, it may cause mechanical removal (peelng). Best Regards, Chad Brubaker EV Group invent * innovate * implement Senior Process Technology Engineer - Direct: +1 (480) 305 2414, Main: +1 (480) 305 2400 Fax: +1 (480) 305 2401 Cell: +1 (602) 321 6071 E-Mail: C.Brubaker@EVGroup.com, Web: www.EVGroup.com -----Original Message----- From: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org] On Behalf Of Teimour Maleki Sent: Friday, May 09, 2008 8:07 AM To: 'General MEMS discussion' Subject: [mems-talk] Solvent effects on Teflon AF Dear all, Does anybody know what is the effect of IPA on Teflon AF coated substrate? When I used IPA, it will remove the Teflon.