Hi. Where do I find information on the Wmin / Lmin...
# sky130
d
Hi. Where do I find information on the Wmin / Lmin of the individual devices? I cant find them in the "device details" section of the pdk docs so am forced to find say Wmin by reducing W until the sim gives me an error. Also, commercial products have been taped out on this process using only discrete values for W and L. Is there a list of these W and L values anywhere? As these WL's are silicon proven I would be more inclined to stick to them in a design I was hoping to Tape out at a reasonable volume.
t
The Wmin/Lmin can also be found in the periphery rules (DRC) section. For 1v8 devices it's Wmin=0.42 Lmin=0.15 except for pfet_lvt where Lmin=0.35
d
Thanks Sylvain. Im afraid I still dont see it. Below is where I am looking: https://skywater-pdk.readthedocs.io/en/main/ Is there a specific DRC# to check?
t
They're a little everyhere ...
(poly.1a) / (poly.1b
are the min poly width (hence Lmin) for instance.
(difftap.2)
is the Wmin
d
ah i see. cool, thanks.