1 Reply Latest reply on Aug 22, 2015 2:31 AM by jim.granville

    Routing nets connected to a plane/copper pour

    mramalfi

      When using a plane/copper-pour layer is it necessary to physically route the connections attached to that plane ?  I.e., I am using a copper pour layer connected to the net 'GND'. I have many components which are connected to the 'GND' net. I routed some of these GND connections, however, when I go into 'Verify Design', I am getting many (para-phrased) 'Error, Subnet of net 'GND' I feel this may be due to the fact of these individually routed 'GND' net connections.

       

      Is this similar to the case when stitching vias, i.e., they don't actually get routed, they are just connected between the plane layers ?

       

      Can someone please clarify ?

       

      Thanks.

        • 1. Re: Routing nets connected to a plane/copper pour
          jim.granville

           

          When using a plane/copper-pour layer is it necessary to physically route the connections attached to that plane ?  I.e., I am using a copper pour layer connected to the net 'GND'. I have many components which are connected to the 'GND' net. I routed some of these GND connections, however, when I go into 'Verify Design', I am getting many (para-phrased) 'Error, Subnet of net 'GND' I feel this may be due to the fact of these individually routed 'GND' net connections.

          You need to Pour any copper ares before you run connectivity checks, and if that pour is able to reach all PADS, and attach thermals, then you will get a connectivity pass. If some pads are un-reached by pour/thermals., you get a connectivity fail ("Subnet.."

           

          In some cases with tight areas, you may need to physically route the connections a short way to a reachable plane area.