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January 2011

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Subject:
From:
Joyce Koo <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Joyce Koo <[log in to unmask]>
Date:
Mon, 24 Jan 2011 07:48:04 -0500
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If you want quick and dirty answer: pressure cooler bias test for 5 days.  Functional test and visual, chemical FA, if no corrosion, you pass. 
--------------------------
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----- Original Message -----
From: Forrester, Michael (H USA) [mailto:[log in to unmask]]
Sent: Monday, January 24, 2011 06:43 AM
To: [log in to unmask] <[log in to unmask]>
Subject: [TN] PCA Cleanliness

    I have a basic question.  What is the industry standard on checking
PCA cleanliness?
Basically there are various methods (ROSE,  IC, etc..).  For a standard
SMT
production line, is the testing done once a day, week, batch, etc..  I
understand that the 
testing is to be used as a process control.  Maybe some SMT lines get
the process 
under control and don't do testing?   What should the total ion
contamination on a standard
SMT  PCA be below for a standard SMT PCA?  Thank you.
 
Best Regards,
 
Michael Forrester
Sr. Product Engineer

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