forbiddenCutClassSpacingRange

Restricts the spacing between two shapes of a given cut class on the given layer. This constraint can optionally apply only for the spacing between short (or end) edges of a rectangular cut class with a common parallel run length greater than zero.

forbiddenCutClassSpacingRange Quick Reference

Constraint Type	Layer
Value Types	`RangeValue`
Database Types	Design, Technology
Scope	design, foundry
Category	Via Construction

Value Types

RangeValue

Specifies the spacing between cut shapes that is considered illegal. Any spacing that falls within the range is forbidden.

For example, if RangeValue is "[minSpacing maxSpacing]", then any spacing where minSpacing <= spacing <= maxSpacing is illegal. For this example, spacing between the two shapes must be less than minSpacing or greater than maxSpacing.

Required Parameter

cutClass

Specifies that the constraint applies only to cut shapes of the specified cut class.

Type: DualValue

Optional Parameter

shortEdgeOnly

Specifies that the constraint only applies between short sides of the cut class shapes. If this parameter is specified, the specified cutClass should be a rectangular cut class. Default is false.

Type: BoolValue

Examples

set_constraint_parameter -name cutClass -DualValue {0.3 0.4} 
set_constraint_parameter -name shortEdgeOnly -BoolValue true 
set_layer_constraint -constraint forbiddenCutClassSpacingRange \
  -layer v1 -RangeValue {"[0.7 0.9]"}

Specifies that the spacing between two end edges of VB (0.3x0.4) rectangular cut shapes on cut layer v1 with parallel run length greater than 0 must not be greater than or equal to 0.07 or less than or equal to 0.09 user units.

Illustration for forbiddenCutClassSpacingRange

Virtuoso Space-based Router Constraint Reference
Product Version IC23.1, June 2023