[gta02-core] Board parameters update
alvieboy at alvie.com
Fri Aug 28 10:37:46 CEST 2009
Werner Almesberger wrote:
> ?lvaro Lopes wrote:
>> How are we to use those layers ? Which will be mostly ground, vcc, and
>> routing ?
> I was thinking of something like this (assuming six layers):
> - TOP (LCM side): components, local routing, and test pads
> - L1: power (routing if necessary)
> - L2: ground (less strict)
> - L3: routing
> - L4: ground (strict)
> - BOTTOM (battery side): components and local routing
> That way, we can "sandwich" EMI-sensitive traces between ground planes
> in layer 3.
Not good for RF lines - vias introduce a lot of reflection. But might be good for other signals.
> But ... I've never designed a multilayer board myself, let alone one
> with RF subsystems, so my ideas may be totally wrong.
>> Shall we use OM approach ?
> Hmm, what would that be ?
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