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The built-in layer pair constraint, oacMinRedundantViaSetback, specifies the metal enclosure required on a metal layer when redundant vias are aligned on the same edge of that metal layer. This constraint is associated with a cut layer and the metal layer, where layer1 is the cut layer and layer2 is the metal layer.
| Constraint type: | oaLayerPairConstraint (Symmetric: no) |
| Value types: | oaInt1DTblValue |
| Database types: | oaDesign, oaTech |
| Object types: | oaAppObject |
The following value types are supported by this constraint:
oacMinRedundantViaSetback constraint has an oaInt1DTblValue, which is indexed by width values.
Units: DBU
This rule ensures that a small shift of the metal layer relative to the cut layer does not cause both vias, which are meant to be redundant, to be non-functional.
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