Power/Ground Checks

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.

Tests

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

Attributes

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.

Measurements

All measurements are from edge to edge of copper, drill or clearance unless stated otherwise.