Hi Bev,
We've talked about taking the two or three worst cases, processing them,
and then performing cross-sections to help determine acceptance.
We are indeed a no-clean user, and I'm not really certain how much our
flux is going to clean what is there.
I've been surprised before, so if it turns out well, it will be just
another lesson to add to my memoirs.
Thanks,
Leland
-----Original Message-----
From: Bev Christian [mailto:[log in to unmask]]
Sent: Friday, May 02, 2008 4:04 PM
To: TechNet E-Mail Forum; Leland Woodall
Subject: RE: [TN] Cleaning of OSP Oxidation
Leland,
Sometimes they look worse than they are. Do you have a bare board like
that you could sacrifice, that is run it through your process and see
how it fares?
Are you a no-clean or OA flux shop? If the latter, you are "probably"
going to be OK.
Bev
RIM
Opinions are my own and do not represent those of the company I work
for. And no guarantee is implied by my answer and no liability is
accepted by me if advice given does not produce the results wanted.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Leland Woodall
Sent: Friday, May 02, 2008 3:34 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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