Re: gEDA-user: PCB suggestion

[Karel Kulhavy <clock@xxxxxxxxxxxxx>]

On Wed, Jan 05, 2005 at 09:14:08PM -0500, Daniel Nilsson wrote:
> On Wed, Jan 05, 2005 at 07:10:34PM -0500, harry eaton wrote:
> > but nothing beyond 6 layers.  It is rare indeed that more than 8 copper
> > layers are required. Usually when 10 and 12 layer boards are made it is
> > because the designers are lazy.
> > 
> > The Pentium processor chip has only 7 wiring layers; it must be of "medium
> > to low" complexity!
> 
> Harry,
> 
> I think this brings up an interesting point, you need to use the right
> tool for the job. With that I mean that there are "classes" of tools
> for various complexity levels on a design. For the complexity levels
> that I think the gEDA tools aim today I agree that more then 12 layers
> should be very rare. But I can on the other hand say that at work we
> have very few boards (if any) that would be routable on a 12 layer
> PCB. I have worked on several designs that required 20 layers to be
> routable for example. But that doesn't really matter because we would
> not be able to use gEDA/PCB for layout work for so many other reasons
> so I consider what we do at work as a different complexity level that
> the gEDA tools currently don't aim for. But for my home projects PCB
> is a great tool and exactly what I need to do the job, which is a job
> of much lower complexity.

How many layers does a typical motherboard have?

Cl<