I am trying to work out what you want to do.  Is it lift off above each
web of the membrane or is the complete membrane a base for a pattern
that includes metal defined by lift off.  More details please.  Bill
Moffat

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Xiaoyong Liu
Sent: Tuesday, December 08, 2009 11:28 AM
To: [email protected]
Subject: [mems-talk] lift off in Membrane

Hi,
    I am trying to deposit metal on SiN membrane windows after
lithography and want to perform liftoff. But seems it is very hard to
remove resist enen overnight soaking in PG remover. Since membrane is
only around 50 nm thick, and I can't not use ultrasonic bath because it
will break membrane.  I even have trouble in using N2 blow to dry
membrane wafers. Does anyone have any experience how to do it on
membrane?

Thanks

Xiaoyong