minEdgeAdjacentDistance

Specifies the minimum length, in user units, for one of the edges between one set of consecutive minimum step edges and another set of consecutive minimum step edges. This constraint also specifies the minimum step edge length, in user units, and optionally, specifies how many minimum step edges must be connected for this constraint to apply. This constraint is usually applied in combination with the minEdgeMaxCount constraint.

minEdgeAdjacentDistance Quick Reference

Value Type

The minEdgeAdjacentDistance constraint is a Value that specifies the minimum length for one of the edges between one set of consecutive minimum step edges and another set of consecutive minimum step edges.

Parameters

The minEdgeAdjacentDistance constraint has the following parameters:

• maxLength (Value) specifies that edges shorter than this value, in user units, are considered to be minimum step edges.
• maxEdgeCount (IntValue) specifies the maximum number of consecutive minimum step edges that are allowed. If count equals 0, then no edge can be less than length. Most tools only allow a value of 0, 1, or 2.
• exceptSameCorner (BoolValue, optional) specifies that the constraint does not apply for an edge that has the same type (concave or convex) of 90-degree corner at each end.
  
  Illustration of ExceptSameCorner
  

Examples

In the following figure, between minimum step edges that are less than 0.6 user units each, there must be an edge that is at least 1.0 user units.

set_constraint_parameter -name maxLength -Value 0.6
set_constraint_parameter -name maxEdgeCount -IntValue 1
set_layer_constraint -layer Metal1 \
  -constraint minEdgeAdjacentDistance -Value 1.0 -hardness hard

PROPERTY LEF58_MINSTEP \
  "MINSTEP 0.6 MAXEDGES 1 MINBETWEENLENGTH 1.0 ;" ;

Related Topics

Length and Width Constraints