Routing Poly Layers

Space-based Router and Chip Optimizer can only route on one poly layer at a time. Poly layers must be defined in the technology database. Routing on poly will be determined according to this precedence:

• db.poly_layer_name environment variable
  If this environment variable is set when the cellview is loaded, the named layer will automatically be recognized as the poly layer and will be a valid routing layer.
• validRoutingLayers constraint
  A poly layer named in this constraint is a valid routing layer. Only one poly layer may be included.

Related Topics

Preparing the Routing Environment

Enabling/Disabling Routing on a Layer