The Power/Ground Checks action is a read-only action intended to
find potential manufacturability defects in power & ground, and mixed
layers. It uses different algorithms to diagnose negative and positive P&G
layers.
The following tests can be applied to Power and Ground (P&G) layers:
1.
Drill - reports distance violations between NPTHs/PTHs/Vias to
plane, copper, clearances and annular rings.
2.
Sliver - reports on slivers in negative and positive layers.
3.
Rout - reports on close spacing between copper/clearances and
rout features.
4.
Thermal - reports on spoke (tie) widths and reduction of
connectivity of thermal pads.
5.
NFP Spacing - reports on spacing between NFPs to NFPs, and
NFPs to planes.
6.
Plane Spacing - reports on spacing between features of
different planes
A summary of Feature and Component attributes used during the
Power/Ground Checks is shown below.
Attribute Name |
Description |
.drill
|
This attribute is attached to hole features in drill
layers. It defines the type of the drill and is used extensively during
fabrication analysis. |
.nomenclature
|
This attribute defines a feature as a nomenclature legend
feature. |
All measurements are from edge to edge of copper, drill or clearance
unless stated otherwise.