---

Contents

---

1

Constraint Groups and Constraints

Constraint Groups

constraintGroups

Constraint Group Definitions

User-Defined Constraint Groups

Combining Constraints in a Constraint Group

Constraints

Spacing Table Constraints

Constraint Parameters

'hard

'soft

'coincidentAllowed

'description

'ref

'manhattan

Advanced Nodes Constraints

Supported Constraints and Parameters: Virtuoso Layout Suite EXL and higher tiers

Supported Constraints and Parameters: Virtuoso Advanced Node for Layout Standard

Supported Constraints and Parameters: Virtuoso Advanced Node for Layout Only

2

Antenna Constraints

antennaCreditRatio

antennaDiffusionWidthRatio

antennaModels

antennaModelCombo

antennaRatio

cumPerLayerAntennaRatio

diffWidthPlusFactor

maxFloatingArea

3

Area Constraints

maxCumAntenna

minArea

minAreaEdgeLength

minHoleArea

minIsolatedArea

minRectArea

4

Density Constraints

maxDensity

maxDensityCheck

maxDiffDensity

maxRelativeColorDensity

minDensity

minDensityCheck

minRelativeColorDensity

5

Extension Constraints

duyExmmtension

finExtension

lineEndAlignedWithCut

matchingFinIndex

maxExtension

minCenterlineExtension

minCornerExtension

minEndOfLineAdjExtension

minEndOfLineEdgeExtension

minEndOfLineExtension

minExtensionDistance

minExtensionEdge

minExtensionEolSpacing

minExtensionOnLongSide

minExtensionToCenterLine

minExtensionToCorner

minGateExtension

minInnerVertexProximityExtension

minInsideCornerExtension

minNeighborExtension

minOppEndOfLineExtension

minOppExtension

minPRBoundaryExtension

minProtrusionWidthWithVia

minQuadrupleExtension

minSideExtension

minTouchingDirEnclosure

minViaExtension

minViaJointExtension

minVoltageExtension

minWireExtension

6

LEF Constraints

LEF_AREACAPACITANCE

LEF_CAPMULTIPLIER

LEF_EDGECAPACITANCE

LEF_HEIGHT

LEF_SHRINKAGE

7

Length and Width Constraints

allowedGateLengthRanges

allowedGateWidthRanges

allowedJogWidths

allowedLengthRanges

allowedNeighborWidthRanges (One layer)

allowedNeighborWidthRanges (Two layers)

allowedNeighborWidthRangesOver

allowedPRBoundaryDimensions

allowedSpanLengthRanges

allowedWidthRanges

boundaryEOLBlockage

illegalHGatePattern

maxDiagonalEdgeLength

maxDiffusionLength

maxEdgeLength

maxLength

maxLengthWithCut

maxNumMinEdges

maxPolyLength

maxTouchingDirectionLength

maxWidth

minChamferLength

minDiagonalEdgeLength

minDiagonalWidth

minEdgeAdjacentDistance

minEdgeAdjacentLength

minEndOfLineAdjacentToStep

minInsideCornerEdgeLength

minLength

minOutsideCornerEdgeLength

minPerimeter

minProtrusionWidthLength

minSize

minStepEdgeLength

minWidth

protrusionWidth

8

Miscellaneous Constraints

allowedShapeAngles

allowedSnapPatternDefs

allowedWireTypes

connectLayers

coreEOLBlockage

diagonalShapesAllowed

edgeMustCoincide

edgeMustOverlap

errorLayer

fixedMask

gateOrientation

ignoreShieldingOnLayers

implantGroup

integrationColorModel

layerDefaultColor

layerProp

layerThickness

lefLayerOrder

lefType

libProp

maxACCurrentDensity

maxNumCorners

minOneDArrayStructure

minStitchOverlap

msCrossTieLayers

msLayerCrossTieInterval

msSameMask

msShieldingLimit

msShieldStyle

multiMaskCheck

overlapViaGroup

pinConnectBlockage

preColoredLayers

rectShapeDir

sameMaskOnLayer

trimMetalTrack

trimShape

useExistingShapesAsShield

validCutClass

vertexInsideForbidden

voltageMode

widthLengthRatio

9

NumCut Constraints

maxViaClusterNumCuts

minNumCut

minProtrusionNumCut

sameMetalAlignedCuts

10

Overlap Constraints

minDirectionalOverlap

minInsideCornerOverlap

minOverlapDistance

minWireOverlap

maxOverlap

overlapNotAllowed

11

Packaging Constraints

pkgMinAperture

pkgMinApertureDefault

pkgMinArea

pkgMinAreaDefault

pkgMaxBondwireLength

pkgMinBondwireLength

pkgMinBondwireSpacing

pkgMinBondwireWidth

pkgMinHoleSpacing

pkgMaxLineWidth

pkgMinLineWidth

pkgMinSpacing

12

Placement and Alignment Constraints

allowedWidthSpacingPatternGroups

allowedWidthSpacingPatterns

defaultActiveWidthSpacingPattern

horizontalOffset

horizontalPitch

keepPRBoundarySharedEdges

keepSharedEdges

snapGridHorizontal

snapGridPeriod

snapGridVertical

verticalOffset

verticalPitch

13

Routing Constraints

clusterDistance

excludeLPPs

horizontalOffset

horizontalPitch (One layer)

ladderFrequency

ladderOffset

ladderStyle

layerMaskShiftAllowed

leftDiagOffset

leftDiagPitch

maxRoutingDistance

numStrands

orthogonalSnappingLayer

orthogonalWSPGrid

rectangularGapMinSpacing

rightDiagOffset

rightDiagPitch

routingDirections

shieldGroupStyle

shieldMinLength

shieldTerminal

strandNumber

strandSpacing

strandWidth

styleAroundVia

tieShield

trackPattern

taperHalo

validLayers

validPurposes

validVias

verticalOffset

verticalPitch (One layer)

voltageLayerMarkerMapping

voltageLayerPairMarkerMapping

14

Spacing Constraints (One Layer)

allowedBetweenNeighborWidthRanges

allowedSpacingRanges (One layer)

bumpMinSpacing

cornerEndOfLineKeepout

cornerKeepOut

Values

cornerOnlyEndOfLineKeepout

cornerFillSpacing

cpodeGroup

cpodeGroupSpacing

deltaVLabelMapping

deltaVLayerMarkerMapping

deltaVLayerPairMarkerMapping

deltaVoltage

directionalEolKeepout

endOfLineKeepout

eolViaKeepout

forbiddenEdgePitchRange

forbiddenProximitySpacing

forbiddenSpacingRanges

forbiddenEdgePitchRange

forbiddenSpanLength

lineEndGap

lithoMacroHalo

maxFilling

maxTapSpacing

minAdjacentFourViaSpacing

minAdjacentTrimSpacing

minCenterToCenterSpacing

minClusterSpacing (One layer)

minConcaveCornerSpacing

minConvexCornerSpacing

minCornerSpacing (One layer)

minCornerToCornerDistance

minCornerVoltageSpacing

minDiagonalSpacing

minDiffNetSpacing

minEdgeLengthSpacing

minEndOfLineExtensionSpacing

minEndOfLinePerpSpacing

minEndOfLineSpacing

minEndOfLineToConcaveCornerSpacing

minEndOfLineToNotchSpacing

minEndOfNotchSpacing

minExtensionSpacing

minFillToFillSpacing

minFillToShapeSpacing

minFiveWiresEndOfLineSpacing

minHoleWidth

minInfluenceSpacing

minJointCornerSpacing

minLargeNeighborViaArrayCutSpacing

minLengthWithCut

minNeighborVoltageSpacing (One layer)

minNotchSpacing

minNotchSpanSpacing

minOppSpanSpacing

minOrthogonalSpacing

minOuterVertexSpacing

minParallelSpanSpacing

minPRBoundaryExteriorHalo

minPRBoundaryInteriorHalo

minPrlTwoSidesSpacing

minProtrusionSpacing

minSameNetSpacing (One layer)

minSideSpacing (One layer)

minSpacing (One layer)

minSpanLengthExtensionSpacing

minSpanLengthSpacing

minStubInfluenceSpacing

minVoltageSpacing (One layer)

oneSideSpacing

onGridOnly

pgViaTrack

requiredEndOfLineShape

shapeRequiredBetweenSpacing

sixWiresSpacing

snapPatternDefOffset

threeShapesForbiddenSpacingRanges

trimMinAdjacentSpacing

trimMinSpacing (One layer)

viaKeepoutZone

voltageLabelMapping

voltageMarkerMapping

15

Spacing Constraints (Two Layers)

allowedSpacingRanges (Two layers)

forbiddenExtensionRanges

gateSpacingRanges

maxSpacing

minCenterLineSpacing (Two layers)

minClusterSpacing (Two layers)

minCornerSpacing (Two layers)

minCutEdgeSpacing

minCutRoutingSpacing (Two layers)

minInnerVertexSpacing (Two layers)

minInnerVertexSpacing (Three layers)

minNeighboringShapesSpacing

minNeighborVoltageSpacing (Two layers)

minOppositeClearance (Two layers)

minSameNetSpacing (Two layers)

minSideSpacing (Two layers)

minSpacing (Two layers)

minSpacingOver

minTouchingDirSpacing

minVoltageSpacing (Two layers)

shapeRequiredSpacing

trimMinCutSpacing

trimMinSpacing (Two layers)

16

Via Construction Constraints

allowedCutClass

bothSidesViaForbiddenSpacingRange

checkOddViaLoop

cutClassPreference

definedCutClassesOnly

forbiddenCutClassSpacingRange

largeRectViaArrayAllowed

maxViaArrayClusterSize

maxViaStack

mergedViaCornerToCornerSpacing

minCutClassSpacing (One layer)

minCutClassSpacing (Two layers)

minDirectionalSpacing

minEndOfLineCutSpacing

minLargeViaArrayCutSpacing

minLargeViaArraySpacing

minLargeViaArrayWidth

minNeighborViaSpacing

minNestedViaSpacing

minOrthogonalViaSpacing

minParallelViaSpacing (One layer)

minParallelViaSpacing (Two layers plus metal)

minParallelWithinViaSpacing

minSameMetalSharedEdgeViaSpacing

minViaGroupSpacing

minViaSpacing (One layer)

minViaSpacing (Two layers)

multiLayer

redundantViaSetback

stackable

viaEdgeType

viaGroup

viaKeepoutMetal

viaMeshEscapeLayer

viaMeshMinCuts

viaRequiredWithin

viaSpacing

viaStackingLimits

A

Constraint Name Mapping for “minEnclosure”, “minExtension”, and “maxEnclosure”

Implementation Specification

B

Technology File Terms

Connectivity Type

Parallel Run Length

Range

Region-based Rule (One layer)

Region-based Rule (Two layers)

Routing Direction

Spacing Direction

Span Length

Via

Via Cut

C

Load CDBA Type Tables

2-D Legacy Table

OA Style Table

Return to top