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Thu, 29 Jul 2004 14:02:27 EDT |
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Hi Jeffrey,
Every little bit can make a big difference. Barrel strengthening and
z-expansion reductions help, insufficient cure, high resin content, and low ED-copper
ductility hurt.
Unfortunately, at this level elongation determination, while adequate as a
process indicator, is inadequate to determine the deposit ductility--for this
you need to go to IPC-TM- 2.4.2.1.
Regards,
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, Cell: 386-316-5904
E-mail: [log in to unmask], Website: www.engelmaier.com
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