See Chapter 4 Capacitivce sensors in Volume 7, Mechanical Sensors of
"Sensors--A comprehensive Survey" series published by VCH Weinheim.New
York.Basel. Cambridge.Tokyo.

And see papers by K. Wise and W. H. Ko in Journals:"Sensors and Actuators"
and "Microsystem Technologies".
Wen Ko


At 05:16 PM 12/1/98 +0800, you wrote:
>hi there! i encountering the same problem. how do detect such small
>capacitance of 1fF?
>
>----------
>> From: Chieh-Hsiao Wang 
>> To: MEMS@ISI.EDU
>> Subject: capacitive sensor measurement
>> Date: Thursday, November 19, 1998 3:31 AM
>>
>> Dear Colleague:
>>
>>      Capacitor in MEMS is usually very small (~ fF).
>>      How can I measure the capacitance of this kind of capacitor at the
>>         presence of large parasitic capacitor and resistor?
>>
>> ---
>> Chieh-Hsiao Wang
>> chhwang@iastate.edu
>> Department of ECpE
>> Iowa State University
>>
>
>
>
Wen H. Ko
Phone: 1-216-368-2071
FAX: 1-216-368-0346
e mail: whk@po.cwru.edu