Homebrew PCBs

On Fri, 10 Mar 2006 17:33:29 +0100, kilocycles <kilocycles@...>  
wrote:

> The writer's description of the copper pour process is not completely
>
> accurate.  He says to rip up the traces and let the autorouter work
>
> while doing the pour.  I've never done it that way.  I do the pour
>
> (polygon gnd) command *after* my board is completely routed...auto,
>
> manual or a combination of both sometimes...and I've resized the
>
> traces, etc.
>
>
> Cheers,
>
> Ted


I would also say the copper pour must be the last step in the process. All  
traces are finished and the board is basically working before i add a  
copper pour.
This is for one or two layer boards, if you have more layers with  
dedicated ground and power planes you would not need to route ground  
traces beforehand.

I do not know the peculiarities of eagle, since the UI is way above what  
my nerves can take, but it should be the same principle.


By the way, anyone know advanced PCb layout pages/online courses/faqs/...  
please let us know.
Someone suggested that analog devices online seminar on PCB design a while  
ago, i watched it but thought it rather poor. The information i learned  
was minimal, and the speaker was really bad (maybe it has to do with the  
transfer/bandwidth limitations).
I do not know if this is in general a problem with analog courses, but the  
ones by national semi are great in comparision.

I would like to know more about design considerations concerning ground  
planes / copper pours especially.

ST