If you can get hold of a copy of my book, there is a whole section on
handling contamination before and after soldering, including a complex
organigram covering natural contaminants and added ones such as
soap/lotion residues etc., pp 116ff. That should scare anyone!!! :-)

Brian

Kevin Glidden wrote:
> Hello everyone,
>  
> We are in the midst of a proposal from myself and manufacturing engineering
> to require use of gloves or finger cots throughout our PCB assembly process.
> We had considered that it really would only be required after final
> cleaning, but for uniformity would require it all steps including
> population.  We have of course met with a real resistance, particularly from
> the final assemblers who are stating it doesn't matter once the conformal
> coat is on.  I can see at least some logic in that, and admittedly a large
> portion of our argument is aesthetics (we don't want fingerprints on the
> boards even after coating), but it would be really nice to have some sort of
> scare tactic, like an article or something that related a PCB failure to
> fingerprints or handling contamination.  Anyone have such a thing?
>  
> Thanks!
> 
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