cutClass
Defines a cut class name and specifies the via width and via length, in user units, for cuts that belong to the given class.
Cut classes are referenced by other constraints, implicitly by class size, to scope those constraints to cuts of the specific class. In cases where a constraint for a cut layer is scoped to a cut class, the rest of the constraints of that type for that layer must also reference a cut class. There is no fallback for a constraint that does not reference a cut class for any cut sizes not covered by cut class-specific constraints.
cutClass Quick Reference
Value Type
Required Parameter
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Specifies the cut class name, which is used to reference the cut class by other constraints.
Type: |
Optional Parameters
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Specifies the equivalent number of cuts of the cut class for the minimum cut rule and calculation of resistance value. If a minimum cut rule requires n cuts, having round up of n/
Type: |
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Specifies that the first value of the dual value is always interpreted as the x-span of the cut class, and the second value is always interpreted as the y-span of the cut class.
Type: |
Examples
create_constraint_group -name cutClassgp -opType or -db tech
add_constraint_group -subGroupName cutClassgp -groupType foundry
set_constraint_parameter -name className -StringValue VA set_constraint_parameter -name numCuts -IntValue 1 set_layer_constraint -constraint cutClass -layer Via1 -create true \ -group cutClassgp -DualValue {0.10 0.10}
set_constraint_parameter -name className -StringValue VB set_constraint_parameter -name numCuts -IntValue 2 set_layer_constraint -constraint cutClass -layer Via1 -create true \ -group cutClassgp -DualValue {0.10 0.25}
set_constraint_parameter -name className -StringValue VC set_constraint_parameter -name numCuts -IntValue 4 set_layer_constraint -constraint cutClass -layer Via1 -create true \ -group cutClassgp -DualValue {0.25 0.25}
Creates three cut classes named VA, VB, and VC for layer Via1. VA and VC are square cut classes (0.10 user units2 and 0.25 user units2, respectively). VB is a rectangular cut class of 0.10 x 0.25. The VB shorter side (0.10) is called the end and the longer side (0.25) is considered the side, as shown in the following figure.
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