Hi: I plan to do spin coating on a silicon wafer. Polyimide UR3 100 and UR3 140 are discribed in the papers I read. But I can not find them. Does anyone know where I can find them? Thanks for help. == ------------------------------ Gang Sun Department of Physics Wayne State University 666 W. Hancock St. Detroit, MI 48201 email: gangsun1969@yahoo.com _________________________________________________________ DO YOU YAHOO!? Get your free @yahoo.com address at http://mail.yahoo.com