Hi TechNet! I can add some supporting data to Paul's comment - I have some
scanning electron microscopy photos of some nicely embedded pencil eraser
particles on both hard and soft surfaces which were "cleaned"  and then alcohol
wiped. The wonderful pearl pink eraser cleaning methodology can result in some
very real latent defects. I would recommend that some type of chemical rather
than mechanical process be explored. Good Luck.

Dave Hillman
Rockwell Collins
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Paul Klasek <[log in to unmask]> on 02/23/2000 04:28:37 PM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to
      Paul Klasek <[log in to unmask]>

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cc:    (bcc: David D Hillman/CedarRapids/Collins/Rockwell)

Subject:  Re: [TN] Cleaning of edge board connectors



Didn't forget this one Frank,
remember my tech folks on OAK switches cleaned even coin silver clips this
way.
But when building for navy , the closer (very much) inspections revealed
particles embedded in the relatively soft gold,
thus creating grit in between on slide points (wearing the gold down fast);
and decided to reserve the rubbing rubbers for civilians and cloth for the
rest .
Than the cloth gradually won over, as slipped over toothpick or sheet of
plastic it got into places nothing else would .
If yo ever cleaned a dozen wafer OAK, yo know what i mean .
Naturlich, above does not apply to fingers in such an extend as with
rotaries .

Yes, the alcohol wipes are good (drivin' to work after a bloody fast shave)

cu  paul



Paul,

You might find this a bit amusing; however, we have found a regular #2
pencil eraser to work best. Afterwards a diluted 10:1 alcohol wipe and they
are good to go...

Franklin


> I'd hate to deprive Jim of business, Chris ,
> but your local jeweler/supply does sell silver and gold cleaning compounds
> and aids .
> The cloth type is sufficient ; just wipe it clean with alcohol afterwards
.
> You're right, gentle clean helps to get the accumulations off
>
> paul
>

>
> Hi technetters,
>
> does anybody have a procedure to clean edge board connectors without
> damaging their Ni/Au coating ?
> we have old boards which may require some cleaning, but we don't know
> whether it is better to let them like they are or to clean them (but with
> which product ?) regarding their reliability.
> Thanks
>
> Christophe Crocombette
> Research Engineer
> Electricite de france

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