Hi  Joe,

I am not very sure to understand your setup and idea.  But the field (300V/20
microns) seems low to me to generate strong electrostatic forces.   What  you
can do is to calculate the force required to deform your membrane and see how
large the field strength you will need to generate the sufficient force.

Ning

>>
>>
>> Hi all,
>>    I'm working on a membrane mirror research, the mirror was fabricated by
anodic bonding of Pyrex 7740 glass to Si wafer.  My idea is, by applying voltage
between the Al electrodes patterned on glasss wafer and the Silicon membrane ,
the membrane will deform through the air gap under the electrostatic force. But,
terriblly, obviously no deformation was observed when even a 300 V voltage is
applied and the air gap is only 20 microns. I have tested the whole structure
and I'm sure that there is no short circuit between the membrane and the Al
electrode, now, I'm desperate and I hope anyone can save me.
>>
>> Joe