hi, if you have high electrical field on touchdown, you might be trapping charge in the alumina and if not dissipated. Shay ----- Original Message ----- From: Youmin WangDate: Wednesday, December 4, 2013 2:49 Subject: [mems-talk] Anti-stiction coating To: General MEMS discussion PFDA coated on ALD Alumina. But seems the stiction and adhesion are> still large. I wonder if anyone of you have done surface treatment before the deposition of PFDA on alumina? Thanks. _______________________________________________ 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