Purpose |
Spacing (p2p, p2c, c2c) is measured only between features of different Layer nets. There is a need to find spacing violations between features of the same net when this spacing is small and can potentially cause slivers . |
Function |
Reports non-touching, non-text features belonging to the same
layer net that are closer than the action parameter pp_spacing . Measurements are
segments representing the distance. |
Activation |
After selecting the Spacing test, check that the number of
features in the net is less than the
large_net_min ERF variable. |
Known Limitations |
Due to performance considerations, nets that are considered
drawn surfaces (that contain more features than specified in the large_net_min ERF variable) are
not tested for Same Net Spacing violations. Measurements are located arbitrarily between the contours
of two parallel features. If the location happens to be over copper that
violation is not reported. |