Hi Tong, Use silane treatment such as FOTS for your epoxy mold, you will solve this sticking problem. Charles Research Fellow Dept. of Electronic Engineering City University of Hong Kong 83 Tat Chee Avenue, Kowloon, Hong Kong 2013-08-08 Charles Tang _______________________________________________ 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