Marc,

Your picture did not come through so I could not tell what kind of capacitor
(electrolytic, tantalum, etc.) you have so it is hard to give advice. An
obvious question is why is one leg or pad different from another. Also, when
are you respinning this PCB?

Dorothy Lush
Manufacturing Engineer
Solectron Corporation
Milpitas California
> ----------
> From:         COWEN,MARC (A-Scotland,ex1)[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;COWEN,MARC (A-Scotland,ex1)
> Sent:         Wednesday, July 11, 2001 3:13 AM
> To:   [log in to unmask]
> Subject:      PTH soldered onto smt pad
>
> Hi All,
>
> We currently have a modification to a PCA where we have added a capacitor.
> Unfortunately the only capacitor suitable for this is a through hole
> device.
> We have therefore asked our supplier to form the legs as follows:
>
>
>
>
>
>
>
>
>
>
>
> We have had instances where the solder on the left hand leg has not been
> sufficient, the leg has come loose and this has worked like a spring. Also
> the RTV compound we have also found to be unreliable.
>
> Could some-one please advise of the following:
>
> 1.      Is there a better adhesive to use instead of RTV compound?
> 2.      Is there a quick and easy way for an inspector to check the solder
> joint without placing undue stress on the capacitor legs or the solder
> joint? We currently asking inspectors to "gently" try to move the leg
> while
> looking at the solder fillet through a microscope to see if there is a
> fracture.
>
> Thanks for your help.
>
> Marc.
>
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