I have already responded to a similar question regarding IST from a previous
Technet posting. I am attaching this as follows :

= = = = = =
>
>We have been using IST testing for a number of years here at Circo Craft.
It has become an indispensable tool for assessing reliability of products
and is used extensively and routinely for validating process changes PRIOR
to implementation. It has the benefit of having a reduced cycle time for
analysis, but just as important, technicians can stop the process before
catastrophic failure. In doing so we can assess the ONSET of failure to
determine root cause of the problem. We have correlated IST versus
traditional thermocycling and have mathematically correlated the data results.
>
>Dave Rooke
>Circo Craft - Pointe Claire

= = = = = = 

>In the last eddition of Circuitree ( April 1997 , p.10 ) there is article
>written by Bill Birch , president of PWB Interconnect Solution Inc ( Nepean
>, Ontario ) about Interconnect Stress Test  ( IST) as a new testing method
>for evaluation of MLB interconnections quality . 
>1 ) Who is keeping such testing equipment available for testing of sample
>boards ?
>2 ) What is practical experience with this method ?
>All responses will be appreciated ! 
>Edward Szpruch
>Eltek Ltd - Israel
>Tel  972 3 9395050
>Fax 972 3 9309581
>E-mail :  [log in to unmask]
>
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