Fellow TechNetters,

I apologize if this may seem like a newbie question and if so I apologize.
I've used OR fluxes and RO fluxes and have always had them removed by the cleaning process as most of the products that I work on have an expected life of 10+ years.  We've typically validated the amount of WOA and Chlorides and set baselines for those.

Someone posed me a question about cleaning no-cleans. Even though in a perfect world a no-clean flux should be 100% inactive after reflow, I'm betting that's never perfectly the case.   So my view and response was that based on the life span and end use environment, my concern would be humidity/moisture mixing with the residual material and in the long term increasing the risk of dendritic growth and other things.  Am I off the mark?

Thanks,

Jeffrey A. Jenkins, CID+
Principal Engineering Designer
Cubic Mission Solutions

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