Thanks Dave, from the other members of the NASA/DoD consortium, for sharing the fame.
The first two rounds of the NASA testing included some rework, especially the Round Two. There, the military, focused on the Navy 2M repair group, wanted to know what reliability effect occurs if Pb-free solder is repaired with eutectic. So far, Defense has allowed only eutectic solder at their repair stations because typical DoD repair technicians have little practical way of determining whether the assemblies are Pb-free (mostly from COTS) or is they are assembled with original eutectic solder. There are no XRF machines on ships and very few at depots.
So, if boards are carefully de-soldered and care used to remove as much Pb-free solder as possible, and eutectic is used to solder in new components - is there reliability loss?
The answer - very little reliability is lost, so long as the repair is done carefully and to specified procedure.
Denny Fritz
-----Original Message-----
From: David Hillman <[log in to unmask]>
To: TechNet <[log in to unmask]>
Sent: Thu, Jul 23, 2015 6:36 pm
Subject: Re: [TN] Dave is famous!
Hi Drew - thanks for the kind words. The Technet community gets the same
credit
for all of the great support and communication of information
sources that
makes our jobs easier. Here is the web link to the
investigation I think Phil
and Jim were
discussing:
http://teerm.nasa.gov/nasa_dodleadfreeelectronics_proj2.htm
The
NASA DoD Phase 2 was a great consortium project with lots of hard
working folks
doing cool things.
Dave
On Thu, Jul 23, 2015 at 3:30 PM, Drew meyer
<[log in to unmask]> wrote:
> Gentlemen. Thanks for the notification of
Dave's work!
>
> Thank you Dave for all your input through Technet and
published data. You
> help all of us face the issues of PCB manufacturing at
one time or
> another. Thanks for all the hard earned knowledge shared!
>
>
Drew
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]
On Behalf Of Ed Popielarski
> Sent: Thursday, July 23, 2015 12:26 PM
> To:
[log in to unmask]
> Subject: [TN] Dave is famous!
>
> Dave Hillman was
mentioned in a widely distributed article today!
>
>
http://www.circuitinsight.com/programs/51504.html
>
> "I would like to point
out that the consortium for the aerospace and
> military people, which our good
friend, Dave Hillman has produced some of
> the best, most comprehensive test
data... Dave, if we're wrong, please
> contact us. But the point is this is the
only known published data
> comparing un-repaired boards with repaired boards
that I know of."
>
> Ed Popielarski
> Engineering Manager
>
>
[cid:[log in to unmask]]
> 970 NE
21st Ct.
> Oak Harbor, Wa. 98277
>
>
Ph: 360-675-1322
> Fx: 206-624-0695
>
Cl: 949-581-6601
>
>
>
> "It's one kind of victory to slay a beast,
move a mountain, and
> cross a chasm, but it's another kind altogether to
realize that the beast,
> the mountain, and the chasm were of your own
design."
>
>
https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&spn=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
>
>
>
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