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Re: gEDA-user: six-layer stack
- To: geda-user@xxxxxxxx
- Subject: Re: gEDA-user: six-layer stack
- From: Matt Ettus <boyscout@xxxxxxxxx>
- Date: Wed, 1 Feb 2006 10:02:43 -0800
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> I'm "nearly done" with a six-layer design using pcb. I have assumed
> all along that the layers come in triplets, so with two ground planes
> every trace is close to ground. Nominal dielectric thicknesses would
> be 5+5+30+5+5 mils.
That's a very odd stackup. Normally, they build a six layer board
from 2 laminates (2 sides each) plus the 2 outer layers. The
laminates are usually thicker than 5 mils. The outer layers are built
differently from the laminates, which is why you can get the 5-8 mil
thicknesses there.
What you are describing is more like a 4 layer board (one laminate
plus outer layers) with 2 additional outer layers on top.
Matt