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Reply To: | TechNet E-Mail Forum. |
Date: | Tue, 10 Apr 2001 22:17:25 EDT |
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Hi Bob,
The reliability issue that more than any other may rear its ugly jhead may be
the reliability of through-vias. Whether this is a problem or nat depends on
how close any of these vias (if any) are to the manual rework areas. Manual
rework with a soldering iron is the most stress-full operation taxing PTHs
and through-vias. The problem would be likely cracking of the via copper
barrels, but innerlayer separation is also a possibility.
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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