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Dynamic Copper Clearance on an individual basis - How to ?

excellon1

Hi, I have this board with multiple small ground planes and I am trying to find a way to back off the copper more than what is applied at the constraint level. Assume a ground plane with a clearance of 25 mil globally I can pour the plane then go to "Global Dynamic Shape Parameters" and increase the oversize there for the back-off of the plane. This works fine but it is working globally which does not work in my situation.

I was thinking that editing the actual shape property via RMB, " DYN_Clearance_Oversize" might be able to accomplish this but no luck there.

Anyone Know how to do this ?

What I guess I am after is copper back-off based on the shape ID that would be independent of any other shape on the board. So the global constraints would be the base minimum then the shape ID + some parameter would increase the back-off for that particular shape based on the net that is attached to the shape.

Hope all that makes some sense Slight smile

Thanks.

  • Hello,

    Dynamic Shape parameters can be controlled at the individual shape instance level, effectively overriding the Global Dynamic Shape parameters.

    • Enter Shape Application mode (RMB > Application Mode > Shape Edit)
    • Pre-select the shapes that you want the override applied to
    • Hover over one of the pre-selected shapes and RMB > Parameters, Dynamic Shape Instances Parameter form will appear.
    • Adjust the oversize under the Clearance Tab and click OK to apply changes/close the form

    Note: If a lot of shapes need to be updated you could use Find By Query under the Find Tab to pre-select many shape objects quickly

    Hope this helps,
    Mike Catrambone

  • in reply to mcatramb91

    Hi there Mike, ah ha so that's where it was hiding out. Got to love Allegro modes Slight smile. This Works like a champ. "Shape Edit Mode"

    I appreciate your help on this. I am Good to go now.

    All the best.

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