Roger, I can't explain but it just happens (I wish it didn't) I think it's somehow very effective ion milling but it's way too fast to be it. Shay -----Original Message----- From: mems-talk-bounces+shay=mizur.com@memsnet.org [mailto:mems-talk-bounces+shay=mizur.com@memsnet.org] On Behalf Of Roger Shile Sent: Thursday, August 11, 2011 7:53 PM To: General MEMS discussion Subject: Re: [mems-talk] Dry etch 50nm Au film, possible? Please explain. Roger Shile