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May 2002

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Subject:
From:
Werner Engelmaier <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Sat, 25 May 2002 22:55:51 EDT
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Hi Tom,
There is no such thing  as high-cycle fatigue for solder, unless you cycle
exclusively below about -40C. HCF is dependent on elastic behavior and solder
does not have any in the T-range of interest due to creep.

Werner Engelmaier
Engelmaier Associates, L.C.
Electronic Packaging, Interconnection and Reliability Consulting
7 Jasmine Run
Ormond Beach, FL  32174  USA
Phone: 386-437-8747, Fax: 386-437-8737
E-mail: [log in to unmask], Website: www.engelmaier.com

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