Override Variant Parameters

Lets you to update a via variant and overwrite the existing via parameter values. If this check box is selected, it allows the via engine to update a via variant.

Environment variable: autoViaOverrideVariantParameters

Extend Enclosure Beyond Overlap

Lets you to extend the via enclosures beyond the overlap region between two intersecting shapes. The shape layer that exists beyond the overlap region helps to accommodate the extended enclosures.

Environment variable: viaExtendEnclosureBeyondOverlap

Create In Route

Lets you to create a via in a new route. If this option is selected, every new via is created in a new route. This check box is selected by default.

Environment variable: viaCreateInRoute

Fill Overlap With Enclosure

Lets you to extend via enclosure such that it covers the complete overlap area between the two intersecting shapes, that is, the bounding box of the via enclosure coincides with the bounding box of the overlap region.

Environment variable: viaFillEnclosureOverlap

Create Vias Using Top Two Layers Only

Enables you to create vias using top two layers only.

Environment variable: viaAutoOnlyOnTopLayers

Consider Blockages

Does not create any via in case a blockage exists between the top and bottom metal of the current overlap. Only via and cut layer blockages are considered, metal layer blockages are not considered.

Environment variable: viaCheckBlockageTypes

Valid Purposes

Lets you to specify a list of valid purposes for via creation in automated modes: auto, fast edit, compute from shape: single, compute from shape: stack. The via will not be created even if one purpose of the overlap shapes does not belong to the list of valid purposes specified in this field.

Environment variables: viaEnableValidPurposes, viaValidPurposes

Ignore Purposes

Lets you specify the list of purposes that will be ignored for via creation in automated modes: auto, fast edit, compute from shape: single, compute from shape: stack.

Environment variable: viaIgnorePurposes

Cut Spacing Method

Lets you to select whether the cut spacing is spread or is using the minimum spacing rule constraints. You can select distribute or minimum from the drop-down list.

Environment variable: viaCutSpacingMethod

Transitions

Lets you to select the transitions when creating a via. You can select all the transitions by selecting the All check box. You can also select the transitions for which you want the via to be created.

Via Definitions

Lets you to define the default viaDefs/via variants to be used in the Single, Stack, and Auto via creation modes. The selected values appear as the default values in the Single and Stack modes when you open the Create Via Form.

Cut Class

Lets you to set up the default cut class for each viaDef/via variant to be used in the Single, Stack, and Auto via creation modes. The list displays the cut class choices if a cutClasses constraint is defined for the cut layer of the selected viaDef in the layerRules section of the technology file. Cut class names defined in the technology file must be unique. The Create Via command does not support identical cut class names.

• The Cut Class value selected in the Create Via Options form appears as the default in the Cut Class list on the Create Via Form for the respective viaDef/via variant selected from the Via Definitions list in the Create Via Form.
• Some examples of the cut class values include Small, Bar, and Large. If you set the Cut Class value as Auto, the Cut Class value is computed automatically by the via engine; in the Single mode, you can explicitly specify the Cut Class. For automatic Cut Class computation, the via engine chooses the Cut Class that maximizes the number of effective cuts in the overlap region.

User Min Cut Spacing

Lets you to specify the X and Y cut spacing for a transition. Select the check box to enable the X and Y fields for the transition for which you want to specify the min cut spacing values.