On 08:44 PM 15/12/2002 -0400, Tim Fifield said:
Can anyone explain the Lomax virtual short used for a GND neck and how it
would be used on an internal layer with 2 polygon planes? Can this be used
to result in no DRC violations? Also how do I keep the planes say 10 or 20
mil apart if allow for them to be much closer in the design rules for the
virtual short?
Consider making the shorting neck a component. Then you can apply the tiny clearance rule to just this component.

Or you could position two rectangular pads close together, giving them suitable names. Then you can restrict the micro-clearance to just these named pads. Then track your neck in and out of these pads as you wish.

The general poly clearance is then preserved.


Should the board house be made aware of the virtual short so they do not
remove the neck?
Yes.

Ian Wilson

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