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July 1998

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Subject:
Re: Cracked capacitors and bulbuous joints
From:
"McMonagle, Michael R." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 20 Jul 1998 07:39:57 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (55 lines) 
Steven,
        This should not cause a problem with regard to component
failures. The way to eliminate it is to rotate the board 90 degrees (if
possible) so the teminations are presented parallel to the face of the
wave. Bulbous joints are acceptable per IPC610A Revision B (Sec 10.2.2,
Fig 10-19) as long as the solder does not extend onto the component
body.

Mike McMonagle
K*Tec Electronics

> -----Original Message-----
> From: CHEUNG, Steven (Collroad) [SMTP:[log in to unmask]]
> Sent: Thursday, July 16, 1998 9:54 AM
> To:   [log in to unmask]
> Subject:      [TN] Cracked capacitors and bulbuous joints
>
> Has anyone encountered capacitors cracking due to bulbuous joint
> formation on wavesolder. We operate a Hollis wavesolder machine with
> air knife and joints on trailing end of a component are larger than
> the joints on the leading end. Can this lead to stressing of the
> capacitors and if so whats the best type of corrective action??
>
> Regards,
>
>
> Steve.
>
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