Looking for thin (pref. capacitive) wafer sensor

[JubilationTCornpone]

Hello, all. I'm looking for a very thin sensor that I can use for detecting silicon wafers. It is to be used in a robotic end-effector for the semiconductor industry.

I had previously planned on using a thin capacitive sensor which was to be offered by a certain vendor. Since then, I've been told that this sensor might not be offered after all, so I need to start looking for alternatives.

Help?

 

[ElectroKing]

Check out OMRON and Keyence for Wafer mapping
Pepperul Fulsch for wafer sensing.
Robot End affector for wafer normally uses vaccuum. Is this for edge grip applications ?