Try http://www.syfer.com/ta_02.htm
I'll send a few more if I find the docs.

> -----Original Message-----
> From: Mary L. Sugden, C.I.D. [SMTP:[log in to unmask]]
> Sent: Wednesday, August 22, 2001 10:22 PM
> To:   [log in to unmask]
> Subject:      [DC] Capacitor Cracking
>
> To:  [log in to unmask]    Attn:   Designer Council Forum
>
> From:   Mary Sugden           At:   [log in to unmask]
>
> Date:   August 20, 2001     Subj:   Capacitor Cracking
>
> Hello PCB Lovers,
> One of our colleagues is experiencing a "capacitor cracking"
> problem and needs technical reports, articles or any other
> type of information you may have on the causes and
> preventions.  Some possibilities are;
>
>     Absorbed moisture? He does not know if the caps
>     are maintained in humidity proof packaging.
>
>     Absorbed moisture? Boards are washed after first
>     soldering then subjected to a second loading &
>     soldering.
>
>     Handling Abuse?  The cracking seems to be limited to
>     capacitors in specific areas near the board edges
>     and tooling holes.
>
> He does not have an assembly flow map so troubleshooting the
> problem is difficult.  Our friend needs all the help he can
> get.  Please send whatever you can.
>
> As you can imagine, he does not want to post his company's
> name and have it broadcasted with this problem.  He says,
> "Business is slow enough as it is."  Please send the info
> to me and I will pass it on to him.  He will contact you
> directly and express his deep appreciation.
>
>
> Best Regards, Mary
>
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