For what purpose? To remove O2, to surface treat for wetability O2. Ed -----Original Message----- From: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org] On Behalf Of basar bolukbas Sent: Friday, January 30, 2009 2:45 PM To: mems litho Subject: Re: [mems-talk] Double lithography problem with SU1828-TI35ES Hello Edward. Which kind of plasma treatments are suitable for SU1828? Or is it not changeable resist by resist? I use SU1828 for first lithography and TI35 for second. I think i will treat SU1828 but i am not sure for the ambient. I can apply O2 plasma, CHF3, SF6, CCl2 with RIE also. Which one is suitable do you think? Thank you for your help.