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.

Internal ERF Name	<Area>:pth2c
Measurement Shape Measurement ID	Segment Drill, thermal or close clearance (negative layer); nothing (positive layer)
Layers Displayed	Power and ground layer Drill layer piercing it
Graphic
Purpose	A hole to be isolated from power or ground planes must be kept apart from copper. The required distance is typically larger than regular spacing due to the higher than usual current.
Function	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. This category also indicates the spacing of the hole from the copper or its laminate annular ring. Normally, it shows how well holes are embedded in laminate.
ERF Parameters	pp_d2c
ERF Variables	classify_via2c
Constraint	Plated Hole Spacing
Limitations	In positive power and ground layers, no associated copper feature is reported.