So here's the deal:

They have two large circular pads (like about .750") that they use as battery
contacts.  He says that this is the place that he has corrosion risk.  I can't tell if
the corrosion risk is from battery leakage or environmental effects.  Anyway, he says
that corrosion significantly impacts the battery life.

ralph

David Hillman wrote:

> Hi Ralph! Can you provide more information on what the customer
> considers/experienced "corrosion" and what type of use environment he/she
> was talking about?
>
> Dave Hillman
> Rockwell Collins
> [log in to unmask]
>
> Ralph Richart <[log in to unmask]>@IPC.ORG> on 06/08/2000 11:55:26 AM
>
> Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
>       to Ralph Richart <[log in to unmask]>
>
> Sent by:  TechNet <[log in to unmask]>
>
> To:   [log in to unmask]
> cc:
>
> Subject:  [TN] still confused
>
> We have answers....
>
> So I had a long talk with my customer this morning to provide input
> based on the invaluable advice from you all.
>
> I said - "is there a specific reason for choosing 3-8u" of immersion
> gold over tin/lead solder?"
> He said - "absolutely, the gold provides corrosion resistance, the gold
> does not"
> I said - "even such a thin amount - only 3-8u"?"
> He said - "definitely, all we need is the coverage, the thickness is
> irrelevant"
>
> Is this true?
>
> Needless to say, we are rebuilding the parts as we speak.  Rework sounds
> difficult to say the least, although I may try to come up with some
> scheme for fun as they have a bunch of boards that are no good right
> now.
>
> thanks for all the help.....
>
> ralph
>
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