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1995

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Subject:
PCBA Ionic Contamination Levels
From:
Evaltine <[log in to unmask]>
Date:
Tue, 3 Oct 1995 17:01:17 -0400 (EDT)
Content-Type:
TEXT/PLAIN
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TEXT/PLAIN (18 lines) 
ANSI/J-STD-001 and other specifications require ionic contamination 
levels of less than 1.56 micrograms/cm2 (10.06 micrograms/in2).  This is 
a reasonable level for overall ionic contamination on Class 3 PCBA's, and 
is a good maximum level for monitoring the cleaning process.  But, what 
about maximum levels for Class 1 (Consumer) and Class 2 (Industrial) 
grade PCBA's ?  Afterall, there are different levels for rosin residues.

Does anyone have ACCEPTABLE (maximum) levels for ionic contamination on 
Class 1 and Class 2 PCBA's ?  Thanks . . .

Ed Valentine ([log in to unmask])
ProTronics, Inc.
Knightdale, NC
Phone: (919) 217-0007, FAX: (919) 217-0050
******************************************

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