Daniel,
Most flex cracks are hidden under the termination at the capacitor
termination/PWA interrface making it very difficult to detect using SLAM
or C-SAM. A quick way to uncover cracks is exposure to humidity & bias
accelerating failure. A few temp cycles ahead of humidity testing will
open the cracks a bit easing humidity entering the capacitor body
accelerating failure.

John Maxwell


>A good acoustic microscope should be able to find these cracks quickly and
>non-destructively.  It is not a cheap tool, though, at $100k-$200k depending
>on the options.
>
>On Mon, 5 Jun 2006 10:11:04 -0400, Tempea, Ioan <[log in to unmask]> wrote:
>
>
>
>>Hi Technos,
>>
>>a never ending story, ceramic caps that crack, possibly due to
>>
>>
>depanelizing. The damage is not visible, unless the cap is cross sectioned.
>
>
>>Is there any testing, thermal cycling or something like that, that could
>>
>>
>show the damage real fast?
>
>
>>Thanks,
>>
>>Ioan
>>
>>

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