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Subject:	Re: Cracked capacitors question
From:	Nancy Trumbull <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Fri, 3 Nov 2000 07:18:51 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (43 lines)

Good Morning,
A company long ago in never never land that I worked for  had a similar problem.  Their's was the press during application of the part to the board.
Good luck
Nancy T.

>>> [log in to unmask] 11/02/00 02:20PM >>>
Dear subscribers:

I have seen in a few of our products some cracked capacitors. The cracks
are very small and it is usually very difficult to see them, even under a
high maginification microscope. When we reflow one side of the capacitor
with the solder iron, the capacitor completely separates. In a few cases I
have seen the cracks even before we touch it up with the solder iron, so I
know that somehow it is happening before touchup. This problem has been
experienced on boards that do not go through the wave. There are other
components like resistors and even other capacitors that do not show the
same problem, even on the same product. The capacitors are 805s.

Any ideas as to what is causing this?

Thanks!

Arturo Urias
National Instruments

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