The pad(s) used in a particular via or pin are determined by the padstack definition and by the intersected primitives in their nets. Multiple pads are sometimes defined for the same layer.
- The intersection point between the central axis of a via or pin and the intersected layers is inspected to determine its metal type (fill, trace, or un-present). By definition, ground layers are fill-metal with primitives defining scratch areas.
- If a fill is intersected, the net of the fill is also taken into consideration.
- Based on the intersection of the fill/net/pads
that are defined in the padstack definition, the choice of pad that is
used is determined using the following algorithm:
- The pad choice on the algorithm is subject to suppressing of non-functional internal pads as described in Layout Editor Options: Object Panel .
Note:
Anti pads subtract material on the fill area.