Hi, Ken,

I'm very interested in your process. Would you please tell me how you
avoided cross-linking (from softbaking to DRIE)?

Thanks,

Yu
----- Original Message -----
From: "Bob Henderson" 
To: "'General MEMS discussion'" 
Sent: Tuesday, September 08, 2009 10:40 AM
Subject: Re: [mems-talk] SU8


Ken:

I have used SU-8 for DRIE and found it to have much higher selectivity than
standard positive photoresist. We were able to pattern an SU-8 formulation
that was only 5 microns thick and do DRIE without cross-linking thus we were
able to ash the photoresist off after etch. It worked well.

Bob Henderson

-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of renil kumar
Sent: Tuesday, September 08, 2009 3:42 AM
To: [email protected]
Subject: [mems-talk] SU8

Hi All,

Does anyone know the selectivity between SU8 and Silicon
in DRIE environment. can i use SU8 as a hard mask during DRIE process. I
want to etch 30 um down to the silicon wafer to form 1.2 um thick vertical
walls for that i am using e-beam lithography.