Well, IPC J-STD-001D states 1.56 micrograms NaCl/cm2, in section 8.3.6.2

That is probably the most official & widely quoted/accepted value.

Whether it is an appropriate value indicating acceptable board
cleanliness is a topic open to near endless debate. 

Rich K / KEDS

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Francis Sun
Sent: Thursday, August 10, 2006 12:11 PM
To: [log in to unmask]
Subject: [TN] Ionic/Chloride contamination levels

Hi Forum,

Can anyone tell me what is the general industry acceptance level for
chloride contamination on a assembled board for a class 2 product
please.
I am getting conflicting statements from 2 evaluation labs.
One says 6.5ug/in2 is acceptable in the industry.
Another says 3ug/in2 is the industry standard or will/should be the
industry standard.

Is there an IPC committee looking at update the acceptable levels?
Thanks in advance for all inputs, opinions and facts

Regards;

Francis Sun
MARK IV Industries
(905) 624-3025 ext. 1235
Fax: (905) 624-4572

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