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How to set up via hole to via hole constraint in Allegro version 16.3?

techk

I mostly use Allegro version 16.3 to support customers.

I can set component hole to hole spacing in constraint manager.

However, this does not flag via hole to via hole errors.

Is there a way to set up via hole to via hole constraint?

The only thing I can think of is to set the via pad annular ring to be the same on all vias and use via to via spacing.

Thanks,

Dan

  • Soundman99

    That should be an option, if you select Spacing, the Vias tab should have Thru Via to Thru Via spacing.  As you mention, you can set them, but they won't be visible if you don't have them turned on.  Go to Setup --> Constraints --> Modes and select Spacing Modes.  Make sure that under Vias you have "Thru via to thru via" selected.  Often times our engineers get these turned off, and the DRCs will not be viable.

    You may also need to set-up the Same Net Spacing, and turn Same net thru via to thru via on, if you aren't seeing those populated as a DRC.

  • techk

    Thanks,

    Thru via to thru via constraint is measured from the edges of the via pads, not the edges of via holes.

  • Tom Nguyen

    Hi Dan,

    Do you have a solution to set up via hole to via hole constraint?

    Thanks,

    Tom

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