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April 2008

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Subject:
From:
"Whittaker, Dewey (EHCOE)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Whittaker, Dewey (EHCOE)
Date:
Fri, 18 Apr 2008 07:09:54 -0700
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text/plain
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text/plain (71 lines)
Terry,
My esteemed colleague is correct, so is Werner. Not knowing your level
of involvement, Werner's White Paper would be a good starting point, as
well as other publications that are available. To be able to sleep
better at night, I require laminates that meet the requirements of
IPC-4101/126 or /129.
Dewey

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier /*
Sent: Thursday, April 17, 2008 1:51 PM
To: [log in to unmask]
Subject: Re: [TN] IPC4101B Questions

Hi Terry,
The materials under these slash sheets may or may not be
'RoHS-compliant',
but with the exception of /99 they are not 'RoHS-capable'. That means
that their
STII (Soldering Temperature Impact Index)-values are too low. /99 gives
a
minimum STII of 202, which would make that material of limited
usefullness for
lead-free soldering processes-there are however materials under slash
/99 that
have higher STII values.
For more information-a lot more information-you should be getting my
White
Paper: "Recommendations for PCB FAB Notes and Specifications in Printed
Circuit
Board Drawings for SnPb and Lead-Free Soldering Assemblies, the
Qualification
of PCB Shops and Activities to Assure Continued Quality."

Werner



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