minWireExtension

Specifies the minimum distance a wire on the specified layer must extend past the center of a via to the inside edge of the wire shape. Applies to both cut layers, the layer above and the layer below.

Usually, an OR constraint group should contain only settings of the same constraint with different parameters. If any of the settings is satisfied, the constraint requirement is met. The exception is that minQuadrupleExtension, minDualExtension, and minWireExtension can be bound together in an OR group and if any of the constraints is satisfied, the extension requirement is met.

minWireExtension Quick Reference

Value Type

minWireExtension constraints have a Value that represents the minimum wire extension in user units.

Parameters

• coincidentAllowed (BoolValue, optional) When true, then shapes can either meet the minimum extension or their edges can be coincident. By default and when false, the edges must meet the specified minimum extension value and cannot be coincident.
• distance (Value, optional) When set, the constraint applies only if there are additional neighboring geometries on layer1 (the extended layer) that are located within the distance specified by this parameter to the extension beyond the via cut.

Examples

This example sets the minimum wire extension on Metal3 to 1.5 user units.

set_layer_constraint -constraint minWireExtension -layer Metal3 \
  -Value 1.5

spacings(
         (minWireExtension "Metal3" 1.5)
        )

Related Topics

Extension Constraints