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The built-in oacDummyPolyExtension layer array constraint specifies the required extension of dummy poly shapes beyond the adjacent shapes on the active layer. If a gate is already joined to another gate above or below, the constraint does not apply. The first layer is the gate layer, the second is the dummy gate layer and the third is the active layer. This constraint uses a parameter to specify the maximum ghost poly width at which it applies.
| Constraint type: | oaLayerArrayConstraint (Number of layers: 3) |
| Value types: | oaIntValue |
| Database types: | oaTech |
| Object types: | oaAppObject |
The following value types are supported by this constraint:
oacDummyPolyExtension uses this oaIntValue to designate the required extension in database units.
Units: DBU
The following parameters are supported by this constraint:
| Name | Value Type | Units | Default | Description |
|---|---|---|---|---|
| width oacWidthConstraintParamType |
oaIntValue | DBU | (Required) |
oacDummyPolyExtension uses a single parameter to designate the maximum ghost polysilicon width at which this constraint applies. An oaConstraintParam of type oacWidthConstraintParamType represents the maximum ghost polysilicon width, in database units, at which this constraint applies. |
In some process technologies, dummy polysilicon shapes must exist on either side of a gate shape.
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