Add layers to circular PCB?

[PhilBiehl]

Can some please indicate how, step by step, to add ground and power layers to a circular PCB in Eagle 9.6.2? I have defined a square polygon around my circular PCB and renamed it to GND. However, Eagle throws an error saying "Signal 'GND ' contains an invalid polygon." I have routed all my signals but have not routed GND or VCC. I have left these pins unconnected on my schematic. There are no DRC errors.

How does one see these layers?

Once I have the layers defined, how do I connect device pins to these layers?

[PhilBiehl]

OK. I've figured out that I need to be on the appropriate layer (2 & 15) in order to create the layer. However, the polygons are still rectangles where my board is a circle. Also, I have named the two layers VCC and GND. I have symbols with power pins named VCC and GND. The issue is that the VCC and GND connections to the two layers is not happening. Looking at the footprint I see the two pins but no traces connecting them to the layers. Needless to say I'm getting a slew of ERC errors regarding the difference between the schematic and PCB.

How do I correct this?

[jorge_garcia]

Hi @PhilBiehl ,

I hope you're doing well. If you want the polygons to follow the contour of the board shape you can generally right-click the outline and select convert to polygons. Now one thing you should be aware of, it is generally not a good idea to use a circle as your board outline. If you ever push it to 3D it likely won't process properly. I would recommend using two arcs instead.

Now the signal the polygon connects to is determined by the name of the polygon, the layer name has no bearing here. So click on each polygon individually and make sure to name them VCC and GND respectively.

Let me know if there's anything else I can do for you.

Best Regards,

[PhilBiehl]

Hi @jorge.garcia,
Thanks for the reply. I now have my layers (VCC and GND) setup, in the correct shape and connected to my devices. I don't plan on doing any 3D modeling so I'm thinking I'll leave the outline as a circle.

One issue I'm having is that I cannot figure out how to selectively disconnect certain pins from the VCC layer so that I can provide better filtering. I want to do this by having a via to the VCC layer then trace to a filter capacitor then another trace connecting to the device pin. Its all the same net. I just want to control the order in with the cap and device are connected. I've tried ripup but it either doesn't do anything or it removes the entire VCC layer.

Whats the best way to do this?