Re: gEDA-user: gEDA and PCB ------

[Stephen Meier <smeier@AlchemyResearch.com>]

Well 40 layers is the max that this shop has done. They are supporting 
companies building complex networking routers and such. I talked to a 
few of their customers last week at a confrence on BGAs that they 
sponsered. How about if you allow 64 layers.  Vias should have a 
starting layer and a stoping layer. Vias should also have internal pads 
similar to the external pads. DJ, for you I will ask my contact to send 
you their current capability matrix so that you have a feal for what is 
comming up in the next couple of years. As my earlier email said I will 
find out how this shop expects these drill files to be formated.

Steve Meier




DJ Delorie wrote:

> > 8 layer board which really isn't enough.... time to get PCB to have a 
> > reasonable number of layers... yes yes i know it will be a lot of work.
> >    
> We were just talking about this yesterday.  I have some ideas about
> implementing it.  I think the tricky part is deciding how many layers
> to allow, or if it needs to be dynamic, and if so, how do you adjust
> the number of layers?
>
>  
> > Yes very complex boards can be built with these tools but it isn't easy. 
> > Next generation BGA will probably require buiried vias, blind vias and 
> > micro vias. Boards of upto 40 layers have been built by the shop I 
> > normally use (not designed with geda and pcb).
> >    
> I know the thing *I* am missing for blind and buried vias is... how do
> you specify them in the gerber files?
>
> (oh, and any way to feasibly try it out too ;-)
>
>