minExtensionEdge (oacMinExtensionEdge)

Description

This constraint specifies the extension of one layer (typically, a metal layer) past another layer (typically a cut layer). The specified extension is typically larger than the oacMinExtension or oacMinDualExtension values. This larger minExtension value is required only if the following conditions are met:

The extension is only required if the metal enclosing the cut has width >= minWidth* has a parallel edge length that is > parLength* and is also < parWithin* away

The extension may be required only for cut shapes of particular cut classes, identified by their viaWidth and viaLength.

For some fabs, the rule does not apply if there is an extra cut. Some processes further require the extra cut to be < = cutWithin distance away.

For some fabs, the rule does not apply if there are two edges on either side of the metal shape that have parallel run length > parLength and within parWithin, parallel to the enclosing metal edge.

Constraint at a Glance

Constraint type:	oaLayerPairConstraint (Symmetric: no)
Value types:	oaIntValue
Database types:	oaDesign, oaTech
Object types:	oaAppObject

Values

The following value types are supported by this constraint:

oaIntValue
This value specifies the minimum extension in database units.

Units: DBU

Parameters

The following parameters are supported by this constraint:

Name	Value Type	Units	Default	Description
width oacWidthConstraintParamType	oaIntValue	DBU	(Required)	This parameter defines the minimum width in database units
cutClass oacCutClassConstraintParamType	oaDualIntValue	DBU	None	This oaDualIntValue parameter refers to the viaWidth and viaLength dimensions of appropriate cut class.
parallelEdgeLength oacParallelEdgeLengthConstraintParamType	oaIntValue	DBU	(Required)	This oaIntValue is used to store the parLength value.
parallelEdgeWithin oacParallelEdgeWithinConstraintParamType	oaIntValue	DBU	(Required)	This parameter is used to store the parWithin value
exceptExtraCut oacExceptExtraCutConstraintParamType	oaBooleanValue	Boolean	False	This parameter is set to true if an extra cut means that this rule can be igored.
oaDistanceWithin oacDistanceWithinConstraintParamType	oaIntValue	DBU	None	This parameter is used to store the cutWithin value which exists only when the exceptExtraCut parameter is specified.
exceptTwoEdges oacExceptTwoEdgesConstraintParamType	oaBooleanValue	Boolean	False	If set to true, it means that the rule does not apply if there are parallel edges that meet the criteria described above on either side of the metal enclosing the cut.

minExtensionEdge (oacMinExtensionEdge)

Description

Constraint at a Glance

Values

Parameters

Examples