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Virtuoso Layout XL/GXL -- rasterizing an anyAngle polygon onto a grid

jack.holloway

Greetings all,

I'm laying out some complex metal structures in a backend process who's design rules only allow metal at multiple of 45 degree angles. Several of my structures utilize other angles, on the gross macroscopic level -- i.e. tapers, etc.

Is there a method (including a SKILL solution) to rasterize a drawn or defined polygon utilizing anyAngle for the snap mode (versus diagonal, horizontal, or vertical) or a microwave taper on to a process grid? It's understood that the edges would necessarily be jagged on the resolution of the grid size.

I am, admittedly, inexperienced with SKILL.

I was able to find a solution to rasterize a circle (http://community.cadence.com/cadence_technology_forums/f/38/t/22352), but it doesn't address my requirement. The alternative is to rasterize these shapes in MATLAB, generate a set of vertices and create a simple SKILL script to generate a polygon.

Any advice would be greatly appreciated.

-J 

Parents
  • MarkRuiter

    Hi Andrew,

    Thanks a lot, that script is very useful!

    For anyone who is new to Skill, a bit of extra explanation:

    1. Save the script as "abConvertPolygonToSteppedEdge.il" in your Cadence Home Dir
    2. Type in the CIW (the main window that starts when you open Cadence):

    load("abConvertPolygonToSteppedEdge.il")

    3. Select the polygon you want to convert to stepped edge your layout
    4. Type in the CIW:

    abConvertPolygonToSteppedEdge(car(geGetSelSet()) 0.01)

    Now the selected polygon will be converted.

    abConvertPolygonToSteppedEdge
    abConvertPolygonToSteppedEdge
    abConvertPolygonToSteppedEdge.il#sthash.1ewYIZp3.dpuf
    abConvertPolygonToSteppedEdge.il#sthash.1ewYIZp3.dpuf
    abConvertPolygonToSteppedEdge.il#sthash.1ewYIZp3.dpuf
Reply
  • MarkRuiter

    Hi Andrew,

    Thanks a lot, that script is very useful!

    For anyone who is new to Skill, a bit of extra explanation:

    1. Save the script as "abConvertPolygonToSteppedEdge.il" in your Cadence Home Dir
    2. Type in the CIW (the main window that starts when you open Cadence):

    load("abConvertPolygonToSteppedEdge.il")

    3. Select the polygon you want to convert to stepped edge your layout
    4. Type in the CIW:

    abConvertPolygonToSteppedEdge(car(geGetSelSet()) 0.01)

    Now the selected polygon will be converted.

    abConvertPolygonToSteppedEdge
    abConvertPolygonToSteppedEdge
    abConvertPolygonToSteppedEdge.il#sthash.1ewYIZp3.dpuf
    abConvertPolygonToSteppedEdge.il#sthash.1ewYIZp3.dpuf
    abConvertPolygonToSteppedEdge.il#sthash.1ewYIZp3.dpuf
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