Hi Art,
Yes, it is called Innerlayer Separation (ILS)—previously post separation; and 
manual soldering processes are the main load drivers (highest temperature 
excursion in the whole PWB history). Other processing inadequacies are 
contributors.

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]  

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