Purpose

A hole that is supposed to be connected to copper must have a sufficiently large annular ring of copper. If this is not adhered to, shifts of the drill and the imaging process may cause the drill not to have sufficient contact.

Function

 

Reports, for drills embedded in copper, the distance to the closest laminate, if less than the action parameter pp_d2c . An option is available to allow breakouts by specifying the breakout angle (as defined by the ERF parameter via_breakout_angle ).

Range of breakout angle values = 0-180 where 0 means No Breakouts Allowed.

Activation

The ERF variable classify_via2t determines whether the system will distinguish between PTHs and vias.

Known Limitations

In positive P&G layers no associated copper features are reported.