On Wed, 6 Sep 2006 12:20:12 -0400
 "Sterner, David [S&FS]" <[email protected]>
wrote:
...snip...
> requires an impractically large sample.  Many IC ESD
> failure mechanisms
> are catastrophic and therefore not repeatable, further
> complicating
> statistical treatment.  

...and worse, some mechanisms of "failure" are insidious.
 Extremely shortening chip lifetime.  Those don't show up
during the test, but the chip is doomed and fails within a
month, or two.  

                    - Robert -

-

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