I'm sure you will hear from Brain, who is to cleaning like Neptune was
to water and from Mr. "It depends" when he arises from the mist of
Mountain Dew, but in the interim a little clean humor. 
All the goodness of your equipment and process controls establishes
capability assessment tools of the "how". In lieu of any prime
directives, the default scenario requires performing Ionic Contamination
Testing and archiving the test data results to establish an auditable
artifact for verification of process control and lot acceptance.
Dewey 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of - bogert
Sent: Thursday, July 26, 2007 4:21 PM
To: [log in to unmask]
Subject: [TN] Cleaning Machine ResistivityTesting Versus Ionic
Contamination Testing

July 26, 2007

I have a question to pose for Tech Net folks based on my limited
experience 
in this area.  If I have a cleaning machine that includes a built in 
continuous test for rinse water or wash water resistivity, do I need to
then 
still do an independent ionic contamination test using the standard DI 
Water/Alcohol Ionic Contamination test?  If so why?  What is the
technical 
relationship between the two tests?  Can one equate the cleaning machine

Resistivity Test results to the J-STD-001 cleanliness limits or the
results 
of the Ionic Contamination test?  If so, how?  Have folks experience
shown 
that one can pass the cleaning machine Resistivity Test and still fail
Ionic 
Contamination Test?  Why?

Doug, Pauls, as the worlds (wow) expert in this area, what do you say
(It 
depends)???.

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