Re: gEDA-user: General Layers questions

[Stephan Boettcher <boettcher@xxxxxxxxxxxxxxxxxx>]

Martin Kupec <martin.kupec@xxxxxxxxx> writes:

> On Tue, Feb 15, 2011 at 11:17:27AM +0100, Stephan Boettcher wrote:
>> And think about vias as well.  Those need a major refactoring as well,
>> to support custom via stacks, blind and burried vias.  
>> 
>> IMHO, vias should be layers as well, with attributes that tell to which
>> conductive layers they connect. 
>> 
>> So maybe it is a good idea to keep vias in mind when redoing they way
>> layers are handled.
>
> I was at the idea, that a via will be assigned set of "physical layers"
> and it will show in each "cooper layer" belonging to that "physical
> layer".
>
> That should be relativly simple to achieve. And by default it will be
> assigned all the "physical layers". Pressing shift or ctrl will make it
> ask what layers you want it to belong. Plus there need to be the
> possibility to change default temporary in order to aid making a lot of
> blind/burried vias at once.

With different annular rings, and clearance on each layer, and
non-circular shapes, ...

A via editor HID shall at least provide means to modify annular and
clearance independently for top, inner, bottom, soldermask top,
soldermask bottom logical layers.  The file formal shall allow to spec
this for each physical layer as well.  When we are at that point, a via
is a stack of structures on various layers.  The hole itself may then be
just a circle on another layer of type via.

-- 
Stephan



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