Hi, Regarding the Netgen, we've faced a serious issue when we want to do LVS. It seems that Netgen cannot distinguish between different pins when we choose the multiplier more than one (in a capacitor bank or amplifier). The layout and the schematic are correct and we've used common centroid method. Appreciate it if you could help us.

For the first screenshot, the MiM cap is not reversible (although you could make it so in the setup file if you wanted to). So to make a match, the schematic should have the MiM caps turned upside down.

@Tim Edwards arren't the MiM cap pins intentionally non-permutable because the parasitic capacitance is different between the upper and lower layers? @sepide asgari Can you share your gds and schematic?

@Tim Edwards About the second screenshot we have a folded cascode OTA, and we want to permute sources and drains. I manage to use " permute default" and " permute transistors" command but there is no changes in the comp.out file. I also tried "permute cell name pin1 pin2" which works properly for PMOS or NMOS, but when I use this command for both NMOS and PMOS, netgen responded an error and jumped out of it. I wonder if there is any course of action to solve it?

Post your extracted spice file and your schematic spice file and your lvs results and I'll take a look at it.

Thank you @Mitch Bailey

What command do you use to run netgen lvs? I'd recommend something like

netgen -batch lvs "opa_post.spice ota" "ota_schema.spice op_amp" $PDK_ROOT/sky130A/libs.tech/netgen/sky130A_setup.tcl

The setup file has all the permutations and reductions defined. You also probably want to generate your xschem netlist with

Simulation -> LVS Netlist: Top level is a .subckt

I run netgen then use [ lvs "opa_posy.spice ota" "ota_schem.spice op_amp" tun1.tcl ]. So I have to use this setup file instead of mine. Thanks for your suggestion.