taperToFirstVia

Specifies whether the taper window is from the instance pins to the first layer change (first via) or bend. When this constraint is not set or is set to false, the taper window is determined by the settings of oaTaperHalo, maxTaperWindow, and minTaperWindow, as specified in Using Tapers.

taperToFirstVia Quick Reference

Constraint Type	Simple
Value Types	`BoolValue`
Database Types	Design, Technology
Scope	design, foundry
Category	Routing
OpenAccess API	custom

Value Type

taperToFirstVia constraints have a BoolValue.

`true`	The taper window is from the instance pins to the first layer change (first via) or bend.
false or not set	The taper window is determined by the settings of `oaTaperHalo`, `maxTaperWindow`, and `minTaperWindow.`

Examples

This example sets tapering from the instance pins to the first layer change or bend for objects assigned to the taper1 taper spec.

set_constraint -constraint taperToFirstVia -BoolValue true -group taper1

Examples for taperToFirstVia

Virtuoso Space-based Router Constraint Reference
Product Version IC23.1, June 2023