Re: gEDA-user: General Layers questions

[John Doty <jpd@xxxxxxxxx>]

On Mar 18, 2011, at 2:23 PM, Martin Kupec wrote:

> If layers types would be defined by attributes, someone would be able to
> declare one layer both as conductive and as silk for example. That could
> cause me a nighmares. That is why I insist on 'typed' layers, not
> 'tagged' layer.

No. The nightmare is classification.

It's perfectly possible to put conductive ink on a board with a silkscreen process.

Layers should, of course, have electrical properties: conductivity, dielectric constant, permeability. Also thermal and mechanical. More grist for the composition machinery, of course, because users will want to use "copper" as shorthand for a list of properties. But the properties are what the code should be paying attention to.

John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd@xxxxxxxxx




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