An educated guess..........................................

They are manufactured by Flextronics in Southern China.

If I had to hazard a guess on the alloy - I would say it was SAC 305.

As to the manufacturer - it really doesn't matter; I have a good idea but do
not want to state it here.

Maybe Werner could give us an opinion if he is on line, as he is such a
knowledgeable source on soldering and lead free reliability but I believe
the comment about the continuous heating / cooling causing stress fractures
is bang on the target, and bad on Microsoft for not finding it way before
they started shipping product - their DVT process demonstrably has a big
hole in it unless someone steps up to own up to a manufacturing defect?

John

 
 
John Burke
 
(408) 515 4992

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dale Ritzen
Sent: Monday, August 13, 2007 10:57 AM
To: [log in to unmask]
Subject: Re: [TN] Lead-Free Problems?

Of course, the $64 million question is: If that IS the case, then what type
of solder was used... SAC305, SN100C, etc., etc. And who made it? I suspect
we'll never know.

Dale Ritzen
Quality Manager
Austin Manufacturing Services

-----Original Message-----
From: Bloomquist, Ken [mailto:[log in to unmask]]
Sent: Monday, August 13, 2007 12:50 PM
To: [log in to unmask]
Subject: [TN] Lead-Free Problems?


I thought this was worth sharing. The Chicago Tribune has an article;
"Coolest electronic gear way to hot for its own good". In the article
they write:

"The Xbox's failure problem has generated more than 1,100 complaints to
ConsumerAffairs.com, an online publisher of consumer news and recall
information.

Adam Carpentieri, who said his online repair site, Xbox360-pros.com, had
fixed more than 2,000 systems, surmised that the culprit was the
lead-free solder Microsoft used to comply with European Union standards
for reducing hazardous materials in printed circuit boards.

As the solder repeatedly heats and cools, it cracks away from the
circuit board's tiny copper connections, causing them, in turn, to
separate and fracture."

Could that possibly be?

KennyB

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