Hello all. I'm working on a layout using gf180. For big transistor devices,

nf

was used to specify them into units. When imported spice for the circuit, I observed that the big devices instead appearing as a unitary fingers with shared drain/source they appeared a single large device. I don't know what would have caused this. I've attached the schematics and magic files and other screenshots that may be useful. @Tim Edwards

It looks like the device generator for gf180mcu was never set up to handle parameter "nf". The device generator script for magic for gf180mcu was never fully developed; we offered the first two open MPWs for digital designs only. Some work was done by Amro Tork to enable pymacros in klayout.

Thank you very much @Tim Edwards. But sometimes last year I was able to experiment with

nf

, using gf180mcu, and it worked. Yesterday when I tried it again it wasn't working. I tried loading the spice file from last year, it loaded all the devices except from those with

nf

value > 1.

It can be done in magic interactively by setting the value for "Fingers". It just doesn't handle the parameter "nf" in the netlist. You can get what you want by changing the paramters after you read in the netlist (which, generally speaking, you would need to do anyway to get the right layout for each device).

Thank you very much @Tim Edwards.