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

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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.