I cannot beleive that this wrong design explains capacitor cracks?

We have not received the answer to the question : which package is this
component  (0805, 1210,1822, ...)?
Are all the components affected or just some of them (which distribution on
the layout)?

Because I met such a problem a few years ago (20 caps per board cracked in
the field on 2000 boards)I would look at following manufacturing steps :
hich soldering process : reflow or wave ?
how are the boards depanellized? (how far from the board edge are the
components? are they parallel to the edge or 90°?)
is a test performed on a test fixture with test probes ?
is a component inserted on a socket?
is the board clipped into a suport?


best regards



> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Bissonnette,
> Jean-Francois
> Sent: jeudi, 13. février 2003 15:45
> To: [log in to unmask]
> Subject: Re: [TN] TH capacitor on SMT pads
>
>
> Nope!  It was not missed... I picked it up and I was told
> that I was making
> a fuss for nothing, "...capacitors are
> holding well, we keep it like this...USE AS IS"....     5
> Face (for the
> terminations that is...)
>
>
> -----Original Message-----
> From: Kathy Kuhlow [mailto:[log in to unmask]]
> Sent: Thursday, February 13, 2003 9:51 AM
> To: [log in to unmask]
> Subject: Re: [TN] TH capacitor on SMT pads
>
>
> What type of end termination is on the cap?  I assume a 3 or
> 5 face.  Wow,
> how could this have missed or unnoticed?
>
> Kat
>
> >>> [log in to unmask] 02/13/03 08:17AM >>>
> I got one more info that may confirm the source of my problem,
> maybe some of you can confirm.
>
> The lands for the capacitors are too close together and probably
> not wide enough.  Seems like the land patern is so that it fits the
> cap's width and the end comes flush with the cap at the ends.
> Results, there is no solder fillet neither on the end nor on
> the sides.
>
> Any thoughts?
>
>

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