[FVF generator] DRC issues bulk spacing and metal width

[LuighiV]

Hi @amisapta15

I'm using the generator available in glayout for the FVF for pfets and seems that the guard rings for the bulks are too close and also the connection of the source with the bulk is not using the minimum metal width. Please, find attached screenshots of the report I got.

Thanks,
Luighi

[amisapta15]

Can you please point to the code line. Is it this one from the FVF part 1 tutorial?

if placement == "horizontal":
    fet_2_ref.movex(fet_1_ref.xmax)
    display_component(top_level, scale = 2,path="../../")
    fet_2_ref.movex(ref_dimensions[0]/2)
    display_component(top_level, scale = 2,path="../../")
    fet_2_ref.movex(pdk.util_max_metal_seperation()+1)
elif placement == "vertical":
    display_component(top_level, scale = 2,path="../../")
    fet_2_ref.movey(fet_1_ref.ymin - ref_dimensions[1]/2 - pdk.util_max_metal_seperation()-1)
else:
    raise ValueError("Placement must be either 'horizontal' or 'vertical'.")

The min metal spacings should be baked in the code + grule files itself. @AL-255

[LuighiV]

Hi @amisapta15
I was using first the one from blocks, so seems that it was updated here: da2a03b#diff-425fd1b48fd855f333a9003388177a09b78a6a50295d0d911c6f4dd5f9036b82R121

Don't know why was changed, but should be returned to the original +1 instead of -0.5, otherwise will throw these DRC errors.

[AL-255]

Hi @LuighiV
This is a known issue, Arnav's repo have a lot of broken cells, they got copied over to the new repo. This particular error is fixed in PR #88

Best,
Anhang

[LuighiV]

Hi @AL-255,
Thanks for answering. Do you have any planning date to merge that PR?

Thanks,
Luighi