Hi, I have used polyacrylamide gel with structures below 20um without problems. I also have SU-8 masters. The gel is hydrophilic. Maybe this works for you as well? Dietrich -----Original Message----- From: 첸로 [mailto:baifenzhi3@126.com] Sent: 09 May 2011 00:23 To: mems-talk Subject: [mems-talk] agar pattern[Scanned] Hi, Does anybody use Agar to replace PDMS to mold? My su-8 master dimension is 20 microns. When peeling off, it is very difficult for me to get a good pattern. Now the Agar physical property is not as well as PDMS. I still want to use Agar material due to is strong hydrophilicity. Any comments wii be highly appreciated.