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August 2005

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Subject:
From:
"Atkinson, Neil" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Atkinson, Neil
Date:
Wed, 10 Aug 2005 17:37:27 +0100
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Any oxidation will take place very quickly and has little effect on the
long term solderability which for HASL boards is dependant on SnPb
thickness and storage temperature. Intermettalic growth rate increases
exponentially with temperature - I love the freezer idea!
 
Check out this link at the National Physics Laboratory here in the UK.
http://www.npl.co.uk/ei/presentations/storage.pdf
 
They found some interesting results where plastic bags appeared to have
a detrimental effect on the solderability of various PCB finishes.
 
Neil

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