Leo, You can try to deposit PMMA via DC-sputtering (0.2Torr, Ar as sputtergas @ ~35W) Cheers Sebastian -----Original Message----- From: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org] On Behalf Of Xiaoguang Liu Sent: Tuesday, October 02, 2007 12:06 AM To: Nitin Shukla; General MEMS discussion Subject: Re: [mems-talk] Photoresist as etch mask! May I ask why do you have to use PR as a mask? On 10/1/07, Nitin Shuklawrote: > Hi, > I would appreciate if anyone could suggest me a photoresist that would not be etched by TMAH or KOH. >