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Capacitor layout using Tanner v13

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ChooiYee Chai

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I have designed a capacitor using Tanner L-Edit v13.
There is only one type of poly in the library. I designed it using poly and poly_cap.
But after the extraction, i got zero capacitance. How to get the capacitance value?
here is the extraction result
Capture.PNG
 

Perhaps poly_cap isn't a real layer, but just a designation layer for caps (marking for cap extraction)?
 

Other capacitor design available?

This doesn't depend on your design tool (Tanner, which I don't have access to, anyway), but on your PDK (physical design kit). You should tell which one you're using (from which foundry), and for which process size.

In CMOS there are always MOSCAPs (poly|gate_oxide|bulk) and MOMCAPs (metal|thick_ox|metal) available, sometimes you can get a MIMCAP (metal|thin_insulator|metal) option.
 

i use mamin08 tech file for tanner..i found mim cap..but its other terminal i auto connected to ground..but i need a cap with two terminals.
 

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