How can I create a zone fill inside a zone keepout area?

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1

I want to create a rule area that is a keepout for some zones but not others.

More specifically, I have a rule area intended to keep out zone fills connected to the “GND” net and I would like to add a zone fill inside this rule area that is connected to the “SHIELD” net. I have attempted to accomplish this with custom rules but have not had success. For example:

(rule “allow shield fill”
(condition “A.intersectsArea(‘keepout_area’) && A.Name==‘shield_fill’”)
(constraint clearance (min 0.1mm))
)

Any help would be greatly appreciated,
Thanks!

2

If distance between inner zone and outer made by clearance is not enough good for you than I think keep out zone should have a shape of moat around inner zone, but I have never tried it.
I remember asking (not sure if only at forum, or may be by feature request) to make it possible for margin layer objects be working only at specified copper layers set.

3

Your example rule makes any item which intersects the area have a clearance of min0.1mm with any other item.

No matter how hard I try, I can’t find a way to do what you want with a rule area.

4

You can already affect specific copper fills in combination with the Margin layer. But that’s not enough in general case if you want to disallow only fills; I can’t get the same working with tracks so that I could ignore the clearance for interactive track routing.

The rule for a specific zone is for example this:

(condition "A.Type == 'Zone' && A.NetName == '+12V' && B.Layer=='Margin'")
(constraint edge_clearance(min -1mm))
5

Is there consensus that it is not possible to create a custom rule that is able to override a rule area zone keepout?