Dear all, i want to structure tungsten dry with PR as masking layer. Does anybody have experiences on etchrates, selectivities to SiO2. I thought about CH4, SF6 or Ar as gases. Regards, Stefan Junge -- Institute for Microsensors, -actuators and -systems (IMSAS) University of Bremen Stefan Junge (Ph.D student) Dep. 1: Physics/Electrical Engineering Otto-Hahn-Allee 28359 Bremen, Germany P.O. Box 330 440 28334 Bremen, Germany Tel.: +49-421-218-3586 Fax.: +49-421-218-4774 E-Mail: sjunge@imsas.uni-bremen.de Internet: www.imsas.uni-bremen.de