Hi James,
When SJs survive 3000 cycles of -65<=>+125C, there has to be something wrong
somewhere. Either there was no damage, then that means there was no loading by
any thermal expansion mismatch; that means either there was no CTE-msmatch or
there were very compliant leads or there was no delta-T. Conversely, there
was damage, then the means of detecting that damage were inadequate.
In either case, you have a null-result from which no conclusion whatever
regarding any relative reliability between SnPb and the tested LF-solders can be
drawn. The only proper conclusion that cann be drawn is that there was
something wrong with the test.

Regards,
Werner Engelmaier

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