Hi Andrea, A CF4 dry etch removes thermally deposited (amorphous) Ge very quickly, but I seem to recall that you're after a through-hole via in a crystalline Ge substrate. So it's worth a try, but no guarantees. Jason Milne -----Original Message----- From: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org] On Behalf Of Andrea Mazzolari Sent: Wednesday, 3 December 2008 5:15 PM To: 'General MEMS discussion' Subject: [mems-talk] Germanium dry etch Hi All, Is there anyone able to realize germanium dry etch ? Best regards, Andrea