minProximitySpacing

Sets the minimum spacing between shapes on the specified layer that fall within a specified distance of a shape of a specified width.

Also known as proximity or influence rules, the spacing required by smaller shapes is influenced by large nearby shapes. The smaller shapes effectively pick up the spacing required by the wider neighboring shape.

minProtrudedProximitySpacing and minProximitySpacing are mutually exclusive. If both are specified, then only minProtrudedProximitySpacing is honored.

minProximitySpacing Quick Reference

Constraint Type	Layer
Value Types	Value, OneDTblValue, TwoDTblValue
Database Types	Design, Technology
Scope	design, foundry
Category	Spacing

Value Types

• Value
  Sets the minimum spacing between shapes on the specified layer. This value type is not currently supported by Space-based Router and Chip Optimizer functions.
• OneDTblValue
  The minimum spacing is the table value that changes according to the lookup key (width) which is the width of the wide shape. This value type is not currently supported by Space-based Router and Chip Optimizer functions.
• TwoDTblValue
  The minimum spacing is the table value that changes according to the row lookup key (width) which is the width of the wide shape, and the column lookup key (distance), which is the distance within which the small shape must be from the wide shape.
  

  Format	Example
  Tcl	set_layer_constraint -constraint minProximitySpacing \ -layer layer -row_name width -col_name distance \ -TblCols {f_influenceLength …} -TwoDTblValue {{f_width {f_space…}}…}
  LEF	LAYER layer TYPE ROUTING ; SPACING f_space RANGE minWidth maxWidth INFLUENCE influenceLength ;
  Virtuoso	spacingTables( ( minInfluenceSpacing tx_layer ( ( "width" nil nil [ "distance" nil nil ] ) ) ( l_table ) ) )

  

Related Topics

Spacing Constraints

Return to top