Purpose

The rout, which represents the edge of the board, must be isolated from the copper planes in order to avoid shorting the signal to the card cage.

Rout to Copper
Function

Negative layers - reports distances between rout skeletons and the edges of surrounding clearances that are less than the pp_r2c action parameter. If there are no clearances around the rout skeleton, the distance is set to zero.

Positive layers - reports skeletons (center lines) of rout features that are too close to copper features. Included if the distance between the rout skeleton and the copper is less than the pp_r2c action parameter.

Measurements are segments representing the distance between the rout lines and copper features.

When the measurement is required to be to the compensated rout, then specify the parameter pp_use_compensated_rout = Yes.

The two most common types of this kind of violation are:

*     The NPTH drills out a spot pad.

*     The NPTH is drilled thru copper that neither includes it nor is included in it, in other words the NPTH bites copper.