Hi Ronald,
>the Electronics Industry's contentions that High-temperature Soldering is
detrimental >to solder joints in general and to the devices into which they
are installed in specific.

To my knowledge nobody in our industry contends that "High-temperature
Soldering is detrimental to solder joints" per se. the problem is that none
of the no-Pb solders have a track-record as far as reliability is concerned,
and that there is evidence of some problem areas. This has nothing to do with
"High-temperature Soldering", even though most no-Pb solders require higher
soldering temperatures, but with the relatively unnknown metallurgies
involved.
"High-temperature Soldering is detrimental to the devices" is simple logic
since many of the materials involved are not particularly stable at elevated
temperatures and because absorbed moisture will produce higher vapor
pressures at higher temperatures.

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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