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Perimeter contribution to area for antenna DRC checks #570

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klayoutmatthias opened this issue May 26, 2020 · 1 comment
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Perimeter contribution to area for antenna DRC checks #570

klayoutmatthias opened this issue May 26, 2020 · 1 comment

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@klayoutmatthias
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klayoutmatthias commented May 26, 2020

Some design rules require the antenna area to be computed by taking the perimeter into account. So the effective metal area is:

Aeff = A + d * P

(A is the metal area, P the perimeter and d some "thickness").

Right now, this perimeter contribution can't be included.

@klayoutmatthias klayoutmatthias self-assigned this May 27, 2020
klayoutmatthias added a commit that referenced this issue May 30, 2020
* First implementation of the perimeter factor for antenna check, unit tests.

* Bugfix and unit tests for GSI binding of new antenna check version.

* DRC integration of perimeter-enabled antenna check.

* Enhanced DRC doc for antenna rule
klayoutmatthias added a commit that referenced this issue May 30, 2020
* First implementation of the perimeter factor for antenna check, unit tests.

* Bugfix and unit tests for GSI binding of new antenna check version.

* DRC integration of perimeter-enabled antenna check.

* Enhanced DRC doc for antenna rule
klayoutmatthias added a commit that referenced this issue May 31, 2020
While doing this, it was discovered that the problem also
persists for EdgePairs and Texts.

In order to provide a more generic solution, some refactoring
was applied.
klayoutmatthias added a commit that referenced this issue May 31, 2020
Now, Edges#extent is deep-enabled.
This also applies to Texts#extent and EdgePairs#extent now.
@Fatsie
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Fatsie commented Jun 1, 2020

In the TSMC tecnology I am using now, the antenna ratio is defined by only using the perimeter of the metal and only the area of the gate. I don't think your fix can handle using perimeter only of the metal in the drc. I only see area_only() and area_and_perimeter(), not perimeter_only().

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