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Add filler macros and script #172

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Add filler macros and script #172

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dnltz
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@dnltz dnltz commented Aug 1, 2024

Add filler macros from Daniel Arevalos and Krzysztof Herman. Also add a Python script to automatically fill a layout and save it.

The following example will fill all layers and generates a DRC clean layout file afterwards.

klayout -n sg13g2 -zz -r /home/daniel/work/elements/i2c-gpio-expander/pdks/IHP-Open-PDK/ihp-sg13g2/libs.tech/klayout//tech/scripts/filler.py \
	-rd output_file=/home/daniel/work/elements/i2c-gpio-expander/tools/OpenROAD-flow-scripts/flow/results/ihp-sg13g2/SG13G2Top/base/6_final.gds \
	/home/daniel/work/elements/i2c-gpio-expander/tools/OpenROAD-flow-scripts/flow/results/ihp-sg13g2/SG13G2Top/base/6_final.gds

@dnltz
libs.tech: klayout: macros: Add filler macros
1e6781c 
These three macros can fill Activ+GatPoly, all Metal layers or all
TopMetal layers.

Based-on: KrzysztofHerman <herman@ihp-microelectronics.com>
Based-on: Daniel Arevalos <daniel.arevalos@sansano.usm.cl>
Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
@dnltz
libs.tech: klayout: scripts: Add Python script to fill a layout
e016bf8 
Klayout .lym files can be executed in batch-mode but Klayout won't
save the altered layout. Add this small script to call each filler
macro and save the filled layout.

This is required to automatically fill a layout during tape-out
process without manual interactions.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
@KrzysztofHerman
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@dnltz thank you for the contribution. First of all we should adjust the operation of the density analyzer, which should calculate total coverage of a particular layer and densities in the square of 800x800 um window. You could take a look at https://www.klayout.de/forum/discussion/167/density-for-a-layer link.
Additionally a more fine grain cells can be used in order to hit the desired density evaluating in the loop a result of previous iteration. Thus one can be sure that the DRC rules for metal fill and metal density are met.

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dnltz commented Aug 7, 2024

@KrzysztofHerman yes, I will check the layout rules for 800x800 windows. What's the ideal density? Just in the middle of min/max?

@KrzysztofHerman
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@dnltz I would work for the middle value at the beginning. Let's see how it converges.

@dnltz dnltz marked this pull request as draft August 8, 2024 20:44
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@KrzysztofHerman KrzysztofHerman Awaiting requested review from KrzysztofHerman KrzysztofHerman will be requested when the pull request is marked ready for review KrzysztofHerman is a code owner

@sergeiandreyev sergeiandreyev Awaiting requested review from sergeiandreyev sergeiandreyev will be requested when the pull request is marked ready for review sergeiandreyev is a code owner

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@dnltz @KrzysztofHerman