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Re: gEDA-user: problem
- To: geda-user@xxxxxxxx
- Subject: Re: gEDA-user: problem
- From: Amr Bayoumi <amr.bayoumi@xxxxxxxxx>
- Date: Wed, 1 Mar 2006 05:22:22 -0800 (PST)
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not quite! but we are looking into 6 layer boards for PC applications, running at a few hundred MHz.
I am worried about signal reflections from such large height vias.
Thanks
Amr
Stuart Brorson <sdb@xxxxxxxxxx> wrote: Ummm, are you sure you need to use buried vias? Most PCB fab houses
don't support them; they are used on super-dense, high-tech boards,
and you pay mucho extra $$$ to get them. They are not used on
entry-level to mid-level boards.
If you *are* using PCB to design a 20 layer OC-192 router board with
10Gig diff co-planar waveguides and 622Mbps parallel busses, then
bully for you! Let us know how it goes!
Stuart
> Hello
> Is there a work-around to the absence of buried vias? for example,=20
> edit the drill file to remove a specific thru-hole, and copy
this=20
> via into the file for layer 2-3?
> Best Regards
> Amr Bayoumi
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