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November 1997

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Mon, 24 Nov 1997 21:20:06 -0500
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Hi Tenison,
If you have investigated pad geometry in terms of your tombstoning problem,
you should have found that smaller is better. Your solder fillets are too
large. Reduce the pads extension beyond the component ends and you will find
the tombstoning disappear. Narrowing the pads is also a good move.

Werner Engelmaier
Engelmaier Associates, L.C.
Electronic Packaging, Interconnection and Reliability Consulting
23 Gunther Street                                 In December:                                               7 Jasmine
Run
Mendham, NJ  07945                                                                  Ormond Beach, FL  32174  USA
Phone & Fax: 973-543-2747                         Phone: 904-437-8747, Fax: 904-437-8737
E-mail: [log in to unmask]

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