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From [log in to unmask] Tue Jan 9 11: |
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Phil's memory is correct.
Norma Lee Todd of Unisys along with Ann Garrison of Goddard Space Flight
Center presented a paper "How Much Rework is Too Much?: The Effects of
Solder Joint Rework on Plated-Through Holes in Multilayer Printed Wiring
Boards." The paper was presented at IPC Printed Circuits Expo '94 in
Boston MA.
Regards
***************************************************
David W. Bergman, Technical Director
IPC
2215 Sanders Road
Northbrook, IL 60062-6135
708-509-9700 x340 Phone
708-509-9798 Fax
email [log in to unmask]
***************************************************
On 8 Jan 1996, Phillip R Barela wrote:
>
> Jon Jahn wrote:
> "Can anyone point me toward that information again or alternatively suggest any
> other references which will help us update this rework guideline?"
>
>
> The results of the study were published out of Goddard Space Flight Center
> (GSFC). If my memory serves me right, this study was performed to see how many
> times and what techniques could be successfully used for PTH PWBs. I believe
> its focus was on via reliability.
>
> Contact Jack Shaw at GSFC (301/286-7123). Jack works in the electronic
> packaging branch at GSFC and can probably get you a copy of the report.
>
> Phillip Barela
> Jet Propulsion Lab
> _______________________________________________________________________________
> Subject: NASA rework study
> From: [log in to unmask] at Internet
> Date: 1/8/96 2:02 PM
>
> About a year I read an article which referenced a NASA study in discussing
> maximum allowable solder joint rework cycles. Can anyone point me toward
> that information again or alternatively suggest any other references which
> will help us update this rework guideline?
>
> regards,
>
> Jon Jahn
> Marquip, Inc.
> [log in to unmask]
>
>
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