how to define non-signal (ground) layer in v7.2

Question

Using the standard version, with a top/bottom and 3 other routing inner layers, a very split power plane layer, how do I define a non-signal inner ground layer that can be polygon poured and get anti-pads around non-ground signal vias during ratsnest?

Stackup will be with only 6 signal layers (if you count the power plane):

1) Top with SMT, low frequency traces, and some high speed routing traces

2) desired inner ground layer

3) inner low frequency routing layer

4) Power plane

5) a 2nd copy of the inner ground layer

6) inner high frequency routing layer

7) inner high frequency routing layer

8) Bottom with SMT components...

Note that I'm going to be using TH vias rather than buried or blind vias, as well as some TH connectors

autodeskguest · Accepted Answer

On 30/04/15 03:39, Bruce Mellen wrote: I'm already using all 6 signal layers for routing and need a separate dedicated ground/supply plane that just accepts polygons and has clearance around the vias when doing a ratsnest. So in other words, you have a license for doing six-layer boards and you're hoping for a cheat that will allow you to do a seven layer board with it. Sorry, Eagle won't do that.