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May 2008

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Subject:
From:
Dwight Mattix <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Dwight Mattix <[log in to unmask]>
Date:
Fri, 2 May 2008 13:09:38 -0700
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text/plain (140 lines)
Shouldn't have started drinking so early though.  Does Bill know?

:-)

At 01:03 PM 5/2/2008, Paul Reid wrote:
>All this because Bev has RIM voids.
>
>Why is a mouse when it spins on it's tail?
>Would you rather walk to work or carry a lunch?
>What would you rather do or drag a board (PCB)?
>When is a tree?
>All generalities are false (including this one)!
>
>I will by galumphing off for the weekend soon.
>
>PR
>
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]] On Behalf Of Dwight Mattix
>Sent: Friday, May 02, 2008 2:53 PM
>To: [log in to unmask]
>Subject: Re: [TN] Voids in internal PCB microvias
>
>When you can snatch the pebble from my hand I will give you a serious
>response (on a friday).
>
>At 11:22 AM 5/2/2008, Paul Reid wrote:
> >Hi Bev,
> >
> >Backfire ... by all means.
> >
> >Your subject line says "Voids in internal PCB microvias"
> >
> >Your customer wants to know the composition of a void in a buried
> >microvia.
> >
> >I think what you have posted is a PCB koan. A classic koan by Hakuin is
>
> >"You know the sound of two hands clapping. What is the sound of one
> >hand clapping"
> >
> >PCB koan - "You know the composition of what fills a filled microvia.
> >What is the composition of what fills a voided microvia?"
> >
> >The important part of the microvia is the part where there is no
> >microvia because that's the part that contains the void.
> >
> >This is the yin and yang of the what is, and what is not, in a
>microvia.
> >
> >
> >Grasshopper, this is the Tao of PCBs.
> >
> >Paul Reid, PCB Inc.
> >
> >PS. I would just look at the RIM of the void.
> >
> >
> >-----Original Message-----
> >From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
> >Sent: Friday, May 02, 2008 12:54 PM
> >To: [log in to unmask]
> >Subject: [TN] Voids in internal PCB microvias
> >
> >TechNetters,
> >I have a customer who wants to know the composition of any materials
> >(if
> >any) inside copper plated internal microvias.  Obviously traditional
> >x-sectioning would lead to contamination by the x-sectioning process.
> >Someone suggested laser cutting, but that is ridiculous, for the same
> >reason.  Someone else suggested FIB, but this is fiendishly expensive,
> >especially for the kind of depth of cut we might be talking about here.
> >
> >Any and all non-Friday afternoon suggestions welcome.
> >(This last statement will probably backfire on me!) Bev RIM
> >
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