Jamie,

You might also try ultrasonic milling for deep etching in glass. Give us a
call
we provide ultrasonic milling services.

Steve Pence
408-980-9324

----- Original Message -----
From: "Haigh, Richard" 
To: "General MEMS discussion" 
Sent: Thursday, March 13, 2003 6:53 AM
Subject: [mems-talk] Alternative to wet etching for glass


Jamie

An alternative route to wet etching that you might try is powder
blasting. This is particularly suited to the abrason of brittile
materials such as glass. Etch depths of 0.5 to 1 mm can been achieved. A
Limiting factor is the appature width which is typically no less than 70
um.

 Regards

Richard
-----Original Message-----
From: Zhimin J Yao [mailto:zyao@rwsc.com]
Sent: 11 March 2003 19:59
To: mems-talk@memsnet.org
Subject: [mems-talk] mask material for wet etch glass

Hi,

We are trying to etch about 0.5 - 1mm deep into glass or quartz using a
metal mask.  Au did not work well because the adhesion layer got etched.
Does anybody know what metal works the best?  Anybody tried W?

Thanks,
Z. Jamie Yao


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