oaMinOrthogonalViaSpacing

Sets the minimum spacing between an overlapping via cut pair and any other via cut shape based on the distance between the cut pair.

When two cuts overlap, either horizontally or vertically, the distance between them determines the orthogonal spacing, as defined in the lookup table. The spacing applies from opposite edges of their parallel overlap, vertically for a horizontal overlap or horizontally for a vertical overlap. No other cut is allowed in the resultant orthogonal overlap region.

oaMinOrthogonalViaSpacing Quick Reference

Value Type

oaMinOrthogonalViaSpacing constraints have a OneDTblValue in which the lookup key is the spacing between the cut pair.

set_layer_constraint -constraint oaMinOrthogonalViaSpacing \
 -row_name width -layer s_cutLayer -OneDTblValue {{f_cutDistance f_space}…}

SPACINGTABLE ORTHOGONAL
  WITHIN f_cutDistance SPACING f_space

spacingTables(
( minOrthogonalViaSpacing s_cutLayer 
  ( ( "distance" nil nil )  )
  ( f_cutDistance f_space )
…
)

Examples

This example sets the required orthogonal spacing between overlapping via cut pairs and other vias as follows:

• If the via cut pair overlap is less than or equal to 0.4, then the orthogonal spacing to other vias must be greater than or equal to 0.75.
• If the via cut pair overlap is greater than 0.4 but less than or equal to 0.6, then the orthogonal spacing to other vias must be greater than or equal to 0.90.
  
  oaMinOrthogonalViaSpacing Examples
  

Related Topics

Via Construction Constraints