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| Date: | Fri, 15 Jul 2005 09:30:15 +0300 |
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I have seen large multilayer ceramic capacitors cleave as a result of
ultrasonic cleaning. This is insidious, as electrical testing reveals no
problem, but part of the component is held only by a thin solder film
and can fall off (shock, vibration, thermal excursions????), reducing
the capacitance value. Visual inspection reveals nothing abnormal, until
you look under a 500 x microscope when you can just see a minute crack
along the line of cleavage.
Brian
Karen Walters Ebner wrote:
> Would anyone list for me in most probable order the causes for cracked
> capacitors. Has anyone had issues with cracked caps with SnAg Solder
> paste????
>
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