At 05:16 PM 11/29/2001 -0600, Jeff Stout wrote:
>So in a PCB, with a stack up like:
>
>T
>--C--
>1
>--P--
>2
>--C--
>3
>--P--
>4
>--C--
>B

(Typical 6 layer/3 core stackup)

>It's only possible to manufacturer:
>
>T -> 1
>T -> 3
>T -> B
>2 -> 3
>2 -> B
>4 -> B

Yes, you cannot connect layers 1 & 2 (as you have them notated) or layers 3 
& 4 without a through-hole via appearing on either layer B or layer T.  Or 
both B and T (cheapest)
I think you've got it, heh heh


Frank Gilley
Dell-Star Technologies
(918) 838-1973 Phone
(918) 838-8814 Fax
[EMAIL PROTECTED]
http://www.dellstar.com

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