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July 2009

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Subject:
From:
Vladimir Igoshev <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Vladimir Igoshev <[log in to unmask]>
Date:
Tue, 14 Jul 2009 18:14:19 -0400
Content-Type:
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Steve,

What I'd potentially worry about is whether the assembly will see
higher temperatures for a long time while in storage, to the degree
that intermetallic can grow thick and potentially consume all solder
in some of the joints. I had a case where the assembly with a hand
soldered part were in field for a few years at 60-70 C and a layer of
solder in the component joints were completely replaced by the
intermetallic, causing overheating and short.

So, your potential assembly can turn on, but could "burn down" soon
after.

  

-- 
Best regards,

Vladimir                          mailto:[log in to unmask]

SENTEC
11 Canadian Road, Unit 7.
Scarborough, ON M1R 5G1
Tel: (416) 899-1882
Fax: (905) 882-8812
www.sentec.ca

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