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Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 2 Oct 2002 07:34:08 EDT |
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Hi Gramsey,
>What about partially filled PTH (with leads) and PTV. Any evidence that
>this reduced reliability?
Yes, partial fills reduce reliability in terms of barrel cracking because of
the resulting stress concentration at the solder/no-solder demarcation line.
However, it is only of real concern for severe cyclic environments.
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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