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samenet spacing violations

Priyatham
After routing using the NanoRoute - when I run a verifyGeometry I get some samenet spacing violations - all on VIAs. When I run verifyGeometry with -allowDiffCellViols, all these violations are cleared. So someone advised that its probably not the routing that's causing the violations but the cell design. But those are the standard cells for First Encounter and I have no clue why they might be causing the problem. Any advise on this and how to resolve this issue would be a great help.

Thanks,

Priyatham.
Parents

  •  Thanks RajaK for your suggestion, I have resolved that problem. Your guess is right, the standard cells I was using were laid out in a way that they couldn't be abutted without DRC violations. So the DRCs were actually not because of the Routing, but because of the Placement itself. To Resolve that issue I set the following parameter to true before doing the placement:

    setPlaceMode -padForPinNearBorder {true | false}

    Adds padding to a cell if any signal pin is near enough to the border to cause DRC violations with any metal geometry.
    Default: false

    That solved the issue. Thankyou for the reply though.

    Priyatham.

Reply

  •  Thanks RajaK for your suggestion, I have resolved that problem. Your guess is right, the standard cells I was using were laid out in a way that they couldn't be abutted without DRC violations. So the DRCs were actually not because of the Routing, but because of the Placement itself. To Resolve that issue I set the following parameter to true before doing the placement:

    setPlaceMode -padForPinNearBorder {true | false}

    Adds padding to a cell if any signal pin is near enough to the border to cause DRC violations with any metal geometry.
    Default: false

    That solved the issue. Thankyou for the reply though.

    Priyatham.

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