How to determine the exact dimensions and spacing for probe-pad design?

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bdatta

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Hello

I am using the 45nm IBM-SOI toolkit of MOSIS to do my custom design. I wont be packaging my die and hence will be just using metal-pads. I will be appreciate it if any of the experienced designers over here can provide some insight on how to go about pad-design. I can understand these will be essentially metal-blobs but any pointers on how to determine the exact dimensions & spacing (based on landing area of probe?) and whether buffering circuits will be required will be really helpful.

Thanks
Basab
 

Re: Probe-pad design

Actually both. I think i can figure out how much capacitive load those pads need to drive & have buffers accordingly. But what i am more concerned about is the actual pad. Is is supposed to be like a giant metal block with contacts? with/without glass layer?
 

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