Hi Jan -
     
     I might be wrong but leaving a weak organic acid residue on the 
     surface of your PWA may get you into trouble down the road. What is 
     your use environment? Will moisture condensation end up on the 
     assembly? What levels of voltage/current are running in the area of 
     the residue? I have had a bad experience with a different Interflux 
     product and non-cleaned residues in my use environment. We ran an SIR 
     test and had an eye opening experience. I suggest you get ahold of 
     Doug Pauls ([log in to unmask]) of Contamination Studies Labs - he may 
     have some useful information.
     
     
     
     Dave Hillman
     Rockwell Collins
     [log in to unmask]
     


______________________________ Reply Separator _________________________________
Subject: Adipic acid
Author:  [log in to unmask] at ccmgw1
Date:    10/1/96 11:51 AM


Hi all TechNetters!
     
I'm just wondering about a no-clean flux made by InterFlux called 
interflux2005M.
Sometimes we need to put some extra flux on certain kinds of components, 
and if there's not enough heat it won't burn away and leave a white 
powder left on the PCB. This is to my knowledge Adipic acid (spelling?).
     
     
How does this affect the components and PCB if it's in one kind of a 
place where you can't brush it off?
     
Of course we can use a waterwash or any similar kind of washer, but we 
don't wan't that extra step in the production. Many people here at 
Ericsson have diffrent theorys about if the flux do harm or not. 
Anybody have any experience in this matter?
     
Regards, 
Jan Merstrand
[log in to unmask]
     
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