Categories in Power and Ground Checks

Several power and ground checks analysis tests can be run. For each test performed, results might be reported to the result categories available for that test. In the result category descriptions in this document, the test name is indicated in parentheses after the category name.

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

Table 1. Result Categories for Power and Ground Checks

Category

Description
NPTH to Copper (Drill)Reports NPTHs closer than pp_d2c or touching copper.
PTH Annular Ring (Drill)Reports the shortest distance between drill and laminate for PTHs embedded in copper if less than pp_d2c.
PTH to Copper (Drill)Reports other net drills embedded in laminate if the distance from the edge of the drill to the nearest copper is less than pp_d2c.
Via to Copper (Drill)Reports other net drills embedded in laminate if the distance from the edge of the drill to the nearest copper is less than pp_d2c.
PTH Contains Clearance (Drill)Reports drills containing clearances on negative layers only. If clearance size is close to drill size, drill connectivity is degraded.
Via Contains Clearance (Drill)Reports drills containing clearances on negative layers only. If clearance size is close to drill size, drill connectivity is degraded.
PTH to Plane (Drill)Reports drills (embedded in copper) closer than pp_d2c to other net copper.
Via to Plane (Drill)Reports drills (embedded in copper) closer than pp_d2c to other net copper.
NPTH to Plane (Drill)Reports NPTHs closer than pp_d2c to other net copper.
NPTH Contains Copper (Drill)Reports NPTHs containing copper on positive layers only.
Missing Cu for Vias (Drill)Reports via holes not completely surrounded by copper in the drill layer with layer attribute Vias Need CU.
PTH Registration (Drill)Reports the center-to-center distance between drills and touching pads, if larger reg_allowance and smaller than max_reg.
NPTH Registration (Drill)Reports the center-to-center distance between drills and touching pads, if larger reg_allowance and smaller than max_reg.
Via Registration (Drill)Reports the center-to-center distance between drills and touching pads, if larger reg_allowance and smaller than max_reg.
Sliver (Sliver) (Power and Ground)Reports slivers, either between two copper areas (positive layer) or two clearance areas (negative layers) (usual case), whose width is less than pp_sliver, and non-zero.
Short Sliver (Sliver) (Power and Ground)Reports slivers, either between two copper areas (positive layer) or two clearance areas (negative layers) (usual case).
Spoke Width (Thermal)Reports thermal spoke (tie) widths in negative layers with flashed pads that are less than their defined widths.
Thermal Connect Reduction (Thermal)Reports all incidents of thermal connectivity reduction in negative layers where thermal pads are flashed.
Plane Spacing (Plane Spacing)Reports features in a positive or negative layer closer than pp_pln_spacing belonging to different plane nets if the measurement segment touches copper only at its endpoints.
Segmentation Lines (Plane Spacing)Reports widths of actual laminate (spacing width) occupied by lines in negative layers only (lines in negative plane layers represent spacing), less than pp_pln_spacing.