Hello everyone, I am a graduate student making microfluidic devices for the first time. I am processing SU-8 2050 negative photoresist on a silicon wafer to try and produce a porous PDMS membrane. My difficulty lies in producing the the SU-8 structures. I have been having adhesion problems, as well as getting my structures to develop uniformly. The pattern I am trying to make is composed of an array of tiny cylindrical posts 50 micros high, with a diameter of approximately 5 microns, and spaced 15 microns apart from each other. The PDMS spin coating is also creating difficulties. When I attempt to peel off the PDMS from the SU-8, the PDMS rips off my posts. I have applied Sigmacote as I was told this would lessen the adhesion between PDMS and SU-8, but it appears to have only helped minimally. If anyone has any good advice or suggestions of new approaches, I would be most appreciative. Thank you. _______________________________________________ Hosted by the MEMS and Nanotechnology Exchange, the country's leading provider of MEMS and Nanotechnology design and fabrication services. Visit us at http://www.mems-exchange.org Want to advertise to this community? See http://www.memsnet.org To unsubscribe: http://mail.mems-exchange.org/mailman/listinfo/mems-talk