viaEdgeType

Defines the types of via edges that are referenced by other constraints as parameters. The constraint applies to the cut layer.

viaEdgeType Quick Reference

Value Type

The viaEdgeType constraint has an IntValue that identifies the types of edges specified by this constraint.

Parameters

• edgeExtension (Value, optional) specifies that via edges with extensions less than or equal to this value for the entire edge, will be assigned to this viaEdgeType.
• anyOppositeExtension (Value, optional) specifies that the constraint applies only to cuts with two opposite edges with extensions less than or equal to this value for the entire edge.
• negateEdgeExtension (BoolValue, optional) applies only when edgeExtension is set. If this parameter is true, all edges that do not satisfy the edgeExtension parameter, are assigned to this viaEdgeType.
• negateAnyOppositeExtension (BoolValue, optional) applies only when anyOppositeExtension is set. If this parameter is true, the constraint applies only to cuts that do not satisfy the anyOppositeExtension parameter.

Examples

• Example 1 — viaEdgeType with edgeExtension only
• Example 2 — viaEdgeType with edgeExtension and anyOppositeExtension
• Example 3 — viaEdgeType with edgeExtension and negateEdgeExtension
• Example 4 — viaEdgeType with edgeExtension, anyOppositeExtension and negateAnyOppositeExtension

Example 1 — viaEdgeType with edgeExtension only

In this example, via edges with extensions less than or equal to 0.09 user units, will be assigned to viaEdgeType 1.

set_constraint_parameter -name edgeExtension -Value 0.09
set_layer_constraint -layer Via1 -constraint viaEdgeType -IntValue 1

Example 2 — viaEdgeType with edgeExtension and anyOppositeExtension

In this example, only cuts with two opposite extensions that are less than or equal to 0.09 user units are considered. For those cuts, via edges with extensions less than or equal to 0.09 user units will be assigned to viaEdgeType 2.

set_constraint_parameter -name edgeExtension -Value 0.09
set_constraint_parameter -name anyOppositeExtension -Value 0.09
set_layer_constraint -layer Via1 -constraint viaEdgeType -IntValue 2

Example 3 — viaEdgeType with edgeExtension and negateEdgeExtension

In this example, all via edges that do not have extensions less than or equal to 0.09 user units, are assigned to viaEdgeType 3.

set_constraint_parameter -name edgeExtension -Value 0.09
set_constraint_parameter -name negateEdgeExtension -BoolValue true
set_layer_constraint -layer Via1 -constraint viaEdgeType -IntValue 3

Example 4 — viaEdgeType with edgeExtension, anyOppositeExtension and negateAnyOppositeExtension

In this example, the constraint applies only to cuts that do not have two opposite edges with extension less than or equal to 0.09 user units. For those cuts, via edges with extensions less than or equal to 0.09 user units, will be assigned to viaEdgeType 4.

set_constraint_parameter -name edgeExtension -Value 0.09
set_constraint_parameter -name anyOppositeExtension -Value 0.09
set_constraint_parameter -name negateAnyOppositeExtension \
  -BoolValue true
set_layer_constraint -layer Via1 -constraint viaEdgeType -IntValue 4

Related Topics

Via Construction Constraints

viaEdgeType