Autorouting multi-layer boards with polygons
It is possible to create supply layers with polygons that contain more than one supply voltage, and individual wires as well.
- Define the polygons before running Autorouter.
- Give the appropriate signal names to the polygons.
- Use the RATSNEST command to let Electronics calculate the polygon.
- Select the preferred directions and base costs (cfBase) for the layer in Autorouter setup. A higher value of cfBase for the polygon layer causes the Autorouter to avoid these layers more strongly.
- After routing, check that the polygon still connects all the signal points. It is possible that the polygon was divided as a signal was laid. RATSNEST recomputes polygons, and issues the message Ratsnest: Nothing to do!, if everything is in order.
Note:
Autorouter cannot set Micro vias. It is allowed to set Blind vias that are shorter than the maximum depth defined in the Layer Setup.