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1996

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Subject:
Re: Cause and Corrective Actions for Pink Ring and Wedge Voids.
From:
"Trevor Galbraith" <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Fri, 23 Aug 1996 14:12:14 +0000
Content-Type:
text/plain
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text/plain (86 lines) 
Jim,

The following paper appeared in a back issue of Circuit World.

-------------------------------------------------------------------------
 ORDER No: 00798

  JOURNAL: Circuit World                          ISSUE: Vol 16 No4
  1990

AUTHOR(S): S Graham, A Hanson, M Hattam, L Jennison, M Jordan, G Klein

    TITLE: The Pink Ring Condition in Multilayer PCBs

----------------------------------------------------------------------
If you are interested in obtaining a reprint, please contact Sarah 
Goldsmith in our Reprints Department. 

Regards,

Trevor Galbraith



> To:            [log in to unmask]
> From:          Jim Reed <[log in to unmask]>
> Subject:       Cause and Corrective Actions for Pink Ring and Wedge Voids...
> Date:          Wed, 21 Aug 1996 17:29:08 -0700
> Reply-to:      Jim Reed <[log in to unmask]>

> We have just identified a problem with PTH reliability caused by Wedge Voids.  We have determined that the voids are associated with occurrences of "Pink Ring".
> 
> This is a new problem for us, but we understand many other fabricators have successfully eliminated this defect from their products.  I would like to know what causes this problem and how to elimi
na
> e it.
> 
> We are focusing our efforts now on our Reduced Oxide pre-lamination treatment process and drilling.  
> 
> We are also concern about our the material based on the T 260 C - TMA Delamination test IPC650 2.4.24.1.
> 
> Any inputs would be welcome.   Thank you for your support.
> 
>                                 Regards,
> 
>                                 Jim Reed, Texas Instruments, Austin, TX
> 
> Voice = 512 250-7172,  
> Fax =   512 250-7967,  
> Email = [log in to unmask]
> 
>                                 Regards,
> 
>                                 Jim Reed, Texas Instruments, Austin, TX
> 
> Voice = 512 250-7172,  
> Fax =   512 250-7967,  
> Email = [log in to unmask]
> 
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