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| Reply To: | (Combined Forum of D-33a and 7-31a Subcommittees) |
| Date: | Wed, 31 Jul 2002 16:20:50 EDT |
| Content-Type: | text/plain |
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Hi Constantino,
You write: >could you tell me in which standard of the IPC, I can find
>information on design criteria about "hole tolerances for unsupported holes
>with respect to lead diameter?
I do not think there is such a standard. For unsupported/non-plated holes I
would not accept anything other than 100% 360 degree solder fillet because of
the much less robustness of such solder joints.
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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