[PCB_FORUM] RE : regarding blind/buried
- From: "Jean-Charles TEYSSIER" <jcteyssier@xxxxxxxxxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Thu, 11 May 2006 10:46:06 +0200
According to me, depends of via technologie:
micro-vias (laser drilled) can reach only one layer depth, so this layer should
be routing layer.
Mechanically drilled vias do not have this restriction, so you have the choice.
Jean-Charles TEYSSIER
Icra Industrie
-------- Message d'origine--------
De: icu-pcb-forum-bounce@xxxxxxxxxxxxx de la part de Hamid Awais
Date: jeu. 11/05/2006 09:33
À: icu-pcb-forum@xxxxxxxxxxxxx
Objet : [PCB_FORUM] regarding blind/buried
Hello all:
I have a question here regarding the stack up for blind/buried boards.
Is this necessary to have ROUTING layer adjacent to Top and Bottom layers or
we may have Planes (negative) layers adjacent to Top/Bottom and then a
positive routing layer.
In case we have planes layer adjacent to TOP, then the TOP-Blind via must be
like from TOP->Plane->Signal layer, right?
Looking forward to some expert opinion.
Cheers,
Hamid.
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