Hi Dan,
There is, to my kowledge, no documentation of "the degradation in the fatigue
life of a fine pitch solder joint after rework." If you do the rework
properly and not too often, there is no degradation in the fatigue life of
solder joints after rework. However, degradation of surrounding solder joints
and/or PTH/PTVs is more likely.

Werner Engelmaier
Engelmaier Associates, L.C.
Electronic Packaging, Interconnection and Reliability Consulting
7 Jasmine Run
Ormond Beach, FL  32174  USA
Phone: 904-437-8747, Fax: 904-437-8737
E-mail: [log in to unmask], Website: www.engelmaier.com

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