Toolbar Options

This section provides the toolbar options to analyze vias.

Analyzes vias in the entire cellview.

Runs analysis in the specified area. The options are: in rectangle, in polygon, or on visible area. Select the Use entire overlap option to use the entire overlap for analysis.

Shows the analyzed vias.

Nets

This section provides options to analyze the possibility of via creation for the specified nets.

Environment Variable: viaAutoViaOnSelectedNets

Exclude Nets

Excludes the specified nets from the analysis.

Environment Variable: viaAutoViaExcludeNetsName

Exclude power/ground

Excludes the power and ground nets from the analysis.

Environment Variable: viaAutoViaExcludePowerAndGroundNets

Constraint Overrides

This section provides options to specify constraint overrides. The Auto Via Assistant uses constraints from a constraint group or locally to override from environment variables.

If no constraint override is selected then the assistant uses constraints from the constraint group. If any constraint override is selected then the assistant uses constraints from the environment variables.

Show All

Displays all constraint override options.

Environment Variable: viaShowAllConstraintOverride

Min Num Cuts

Specifies the minimum number of cuts to be automatically created for overlapping areas between shapes.

Environment Variable: viaOverrideMinNumCutsConstraint, viaAutoViaMinNumCuts

Alignment

Specifies the alignment of vias. The choices are Auto, Top left, Top center, Top right, Center left, Center center, Center right, Bottom left, Bottom center, Bottom right, Edge align, Two edge align, or Two edge align center. The default is Auto .

Environment Variable: viaOverrideAlignmentConstraint, viaAutoViaAlignment

Cut Class Orient

Specifies the preferred orientation for the cut class. The choices are Auto, Horizontal, Vertical, or Same orientation.

Environment Variable: viaOverrideCutClassOrientConstraint, viaCutClassOrientation

Cut Array Dir

Specifies the preferred direction for the cut box as Auto, Horizontal, or Vertical. The default is Auto.

Environment Variable: viaOverrideCutArrayDirConstraint, viaAutoViaCutArrayDirection

Enclosure Dir

Specifies the preferred enclosure direction for the via engine in auto mode as XY, Wire, Min area, Horizontal, or Vertical.

Environment Variable: viaOverrideEnclosureDirConstraint, viaAutoViaEnclosureDirection

Place via on centerline

Specifies whether the via is placed on the centerline.

Environment Variable: viaOverrideOffCenterViaConstraint, viaPreventOffCenterVia

Add Metal

Adds a metal layer to the via.

Environment Variable: viaOverrideAddMetalConstraint, viaEnableAddMetal

Enable

Enables the Extend to orthogonal wire option.

Maximize cut

Lets you get a bigger cut size at the cost of more added metal outside the overlap.

Environment Variable: viaOverrideMaximizeCutsConstraint, viaMaximizeCuts

Extend to orthogonal wire

Extends vias to the width of the crossed wire.

Optimization

This section provides options to optimize via analysis.

Try with smaller cut classes

Places a via with a smaller cut class if a larger via is not DRC aware.

Environment Variable: viaTryWithSmallerCutClass

Attempt to use bridge vias

Places a bridge via according to the topology. If the bridge via is invalid, a basic via is created.

Environment Variable: viaAttemptToUseBridgeVias

Fix DRC on overlap shapes

Prevents the creation of a via if it introduces DRC violations on an overlap. If this option is not selected, the via is created even if it introduces DRC violations on the overlap.

Environment Variable: viaFixOverlapShapeViolations

Processing

Species the processing options to be used during via analysis. The choices are Distribute on multi CPU, or Single CPU.

Environment Variable: viaMultiProcessMode

Max Num CPUs

Specifies the number of CPUs to be used during via analysis.

Environment Variable: viaMultiProcessNumCPU

More Options

This section provides options to specify the stack depth.

Max Stack Depth

Specifies the value of maximum stack depth to search the overlap with the same number of transitions or less than the specified number.

Environment Variable: viaMaxStackDepth