And blind vias can be difficult for cleaning processes :)


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Lee parker
Sent: Friday, March 24, 2006 2:10 PM
To: [log in to unmask]
Subject: Re: [TN] Blind/Buried Vias

Darrel

I have found that blind and buried vias can be used to compensate for two
and sometimes four layers. Normally, it has been my experience that the
break even price is four layers, but this is highly dependent upon the board
shop. Keep in mind that blind vias usually mean component construction which
is expensive.

Best regards

Lee

J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389


----- Original Message -----
From: "Darrel Therriault" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, March 24, 2006 1:34 PM
Subject: [TN] Blind/Buried Vias


> Technetters,
>
> We have a design that is very dense and routing is going to be a
> challange.
>
> Is there any rule of thumb for gaining routing space by going to blind
> and buried vias relative to standard vias (We can't increase layer count)?
>
> Is there any rule of thumb for a cost increase one would expect to incur?
>
> Any info appreciated.
>
>
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> Thanks....DJT
>

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