I am looking for some helpful hints in pursuing a design using Orcad Layout 7.10a  with Blind and Buried Vias.

This particular design is densely populated with SM components on Top & Bottom.  Probably an 8-10 layer board ( 2 planes )

This will be my first shot at using B&B vias  and I don't want to get too carried away ( 5 or  6 different drill tapes ) .
I understand that with Orcad, I can just define several vias, assign them to the nets,  and the Router will select
The appropriate via as needed.

Are there any recommendations/suggestions as to how deep the blind vias should go? How many layers should the buried vias traverse?  Are there "good" strategies to approach the definition of the vias?  Or is this strictly design dependent and 'I'm on my own'?

How about recommendations from the fab point of view ?

Thanks..........

MARK  RADLEY
Rick Pray & Associates
96 Lock Street   Port Crane, New York 13833
607-648-8594  (voice)  //  607-648-2535 (fax)
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