Have you talked with the board shop yet? They might be able to do something.

We do OSP here, if I were presented with that question I would at least try
it before I gave up.

Suggest to the board shop that they might consider using a corning-ware (i.e
Pyrex) casserole dish to set up a micro-etch and the OSP solutions, gently
lower them to contact the bottom side only, and see if you can get something
to stick to that? It's worth a shot to 1) know if it can even be done 2)
make it less painful tossing out the scrap ($).

Franklin

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Leland Woodall
Sent: Friday, May 02, 2008 2:34 PM
To: [log in to unmask]
Subject: [TN] Cleaning of OSP Oxidation

Folks,

I have about 30 OSP boards that have been processed on the bottom side,
were stashed away or misplaced for 6 to 9 months, and recently brought
to me for permission to process on the top side.

Most of these appear to have varying degrees of oxidation, as the
original light orange copper appearance has begun to look more like a 5
year old penny.

Is there a way to salvage this product?

Not only will they get the more complex components (appx. 70% of
assembly cost) during top side build, but they must also undergo wave
soldering of a 132 pin connector and several through-hole power
transistors.

I feel quite uncomfortable with doing anything other than trashing the
product...

Thanks,

Leland Woodall

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