Ok, I did cosider if the URL might have skipped.
Now it points to 15. How to Create Power Planes, for Example for GND?
That explains the remove islands option, which is good but does not
solve the problem in this particular case, at least on it's own.
We still don't understand each other completely, let's try again. ;-)
We want to use both layers, it is mostly a two layer board. There are
traces running on both layers and many components are connected on
both layers. However some components should only be connected at one
side, for Brian because he can't solder the top side on some parts
that cover the pad and has no PTH, and for me because I need to have
no top pad on some components for production reasons (wires are
soldered there later).
No I don't know how to define the padstack so that there's a pad on
the bottom but no pad on the top. I can only set global design rules
for all pads at once.
I don't use the autorouter as a general rule, I find it useless and as
you say 90% is placement, I think a further 9% is cleanup and I might
as well do that 1% left for the autorouter myself.
The restrict area could work well for Brian because it would prevent
the powerplane and any trace from connecting and leaving an island.
Since Brain doesn't need the pads itself to go away that would seem
like a good solution. Put a top restrict circle on each pad in the
library for the parts you can't solder and you should be good to go.
I don't think there is any solution for myself, other than faking it
with a SMD pad on the bottom side, a hand drawn round pad surrounding
it, and a mounting hole to get it drilled.
ST
On Thu, Jan 21, 2010 at 6:51 PM, Simao Cardoso <simaocardoso@...> wrote:
> Stefan Trethan wrote:
>
>> The section you linked to doesn't answer the question.
>
>> >> I ended up with an isolated ground plane on my first board.
>
> Don't know how happen, should been this:
> http://www.cadsoft.de/faq.htm.en#07021201
>
>
> But i think this is a wrong question problem. To use bottom single layer
> don't even print the top layer. To use the autorouter for single sided
> or easy homemade double sided there is the tRestrict trick. But
> generally is done by manual routing. How they say it, 90% placement 10%
> routing?
>
> Simao
>
>
>
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