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October 2003

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Subject:
From:
Collins Graham <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 17 Oct 2003 14:32:18 -0400
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Hi John
Wow, 86000?  Not fun.

I see three possibilities, none of them very fun.  In order of my
preference:
1) use a stronger flux - are you using an OA?  Of course, then you get
into cleaning considerations
2) pay someone to strip and refresh the surface, we have used Six Sigma
Services for this http://www.sixsigmaservices.com/ - but never for that
quantity!
3) if you slip Dave Hillman a case of Mtn. Dew or his beverage of
choice maybe you can use his ROSA machine



regards,

Graham Collins
Process Engineer,
Northrop Grumman Canada Corporation
Halifax
(902) 873-2000 ext 6215

>>> [log in to unmask] 10/17/03 03:14PM >>>
I have a  large inventory of trim capacitors that have exceeded the
manufacturers shelf
life by 2 years. Solderability testing has revealed inadequate wetting.
The
parts are on
tape and reel. The plating is a thin layer of tin over nickel. We
believe we
have a oxidation problem. Does anyone have any ideas AT ALL on how we
can
recover these
parts. The part has gone obsolete I have 86,000 of these things that I
really really need to use.

Any help would be appreciated

Thanks
John Foster

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