laurentc2 / sky130_for_klayout Goto Github PK

Hi !

I love the progress you made on the DRC/LVS. Would you please contact me. I would like to try to use Layout as a second checker for all the shuttle spots. My email is mkk at efabless.com and my cell is 650 889 8145
Thanks!

M

Hi,

For some reason, even when I deliberately make the poly to poly spacing in klayout to be under 0.21um ( i tried 0.1um and 0.05um),
the drc file (sky130A.lydrc) does not catch it. I tried doing this in magic, and the drc was caught immediately. Do you know what could be the issue?

Thanks

Hi!

This looks like cool work!

We have a spreadsheet at https://docs.google.com/spreadsheets/d/1oL6ldkQdLu-4FEQE0lX6BcgbqzYfNnd1XA8vERe0vpE/edit#gid=530166750 (see the "Magic DRC rule status" sheet) which documents the status of DRC checks in Magic. It would be awesome to also have the KLayout column tracking your status, are you interested in helping with that?

Tim '@mithro' Ansell

Hi,
I deliberately did not extend my poly over diffusion (NMOS) to see if DRC will catch it. Unfortunately it did not. I have opened the gds file in magic, and it catches the drc violation.

Hey,

I've been trying out the DRC files and it's looking good. I did notice one odd thing with vias though.

I think there is no error as the via is totally enclosed by metal 1 and metal 2 but an error is still reported. Maybe you have some ideas of where the issue lies?

I've included the original in a zip file you should be able to open.

test.gds.zip

I was trying to understand why DEF files in klayout had issues naming layers. In KLayout/klayout#700 the klayout maintainer points out that we are missing some LEF/DEF to GDS layer mappings.

There isn't a mapping for "met4" for example. In fact all the metal layers and via layers need a mapping.

I've spotted an error in the connectivity setup:

SKY130.lyt (105-119)

 <connectivity>
  <connection>66/20,66/44,li</connection>
  <connection>li,67/44,met1</connection>
  <connection>met1,68/44,met2</connection>
  <connection>met2,69/44,met3</connection>
  <connection>met3,70/44,met4</connection>
  <connection>met4,71/44,met5</connection>
  <symbols>met1='67/20+67/5'</symbols>
  <symbols>met1='68/20+68/5'</symbols>
  <symbols>met2='69/20+69/5'</symbols>
  <symbols>met3='70/20+70/5'</symbols>
  <symbols>met4='71/20+71/5'</symbols>
  <symbols>met5='72/20+72/5'</symbols>
 </connectivity>
</technology>

Line 112 should be:

  <connection>li,68/44,met2</connection>

I am experiencing a number of errors with P- poly resistors that are generated in Magic with the sky130A generators.

These issues seems to be caused by the precision resistors not being correctly detected and applying the correct rules.

I have attached and example GDS to demonstrate this.
res.gds.zip

Hi,

This is not the ideal method to communicate this but I can't seem to find a message user function.

There's some discussion over on the Skywater Slack #klayout channel about integrating your great work into the core distributed PDK. If you're interested, it would be great for you to join the discussion. The link is:
https://invite.skywater.tools/

I can delete this issue afterwards as it's not an actual issue with the tools.

Cheers,
Thomas