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July 1997

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Thu, 10 Jul 1997 16:42:18 -0400 (EDT)
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The answer to your question is: It depends. Sorry that is not very helpful,
but reflects the fact that the construction (number of layers, thickness,
hole diameter, etc.) and material (CTE, Tg, etc.) of the PCB have a
significant impact. Five reflow cycles is sort of a rough number where some
PCBs have started to fail. I do not know why you have included joints (solder
joints?) in this question. 

Werner Engelmaier
Engelmaier Associates, Inc.
Electronic Packaging, Interconnection and Reliability Consulting
23 Gunther Street
Mendham, NJ  07945  USA
Phone & Fax: 973-543-2747
E-mail: [log in to unmask]

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