Or the first 56 Heinz flavors or WD-1 through 39....

 

Happy Friday!  Caloo Calay!

 

Bob Wilson

E/M Designer, CID+

SpectraSensors, Inc.

11027 Arrow Route

Rancho Cucamonga, CA 91730

(909) 948-4110

www.spectrasensors.com

www.ipc.org

 

 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Whittaker, Dewey
(EHCOE)
Sent: Friday, May 02, 2008 11:41 AM
To: [log in to unmask]
Subject: Re: [TN] Voids in internal PCB microvias

 

With that inspiration it begs one to ponder "what is the speed of dark"

and with voids in the hole "what ever happened to preparations A through

G".

Dewey

 

-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Paul Reid

Sent: Friday, May 02, 2008 11:23 AM

To: [log in to unmask]

Subject: Re: [TN] Voids in internal PCB microvias

 

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.

 

 


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