Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Ionic washing

jj

#27647

Ionic washing | 17 March, 2004

Has anybody heard about "ionic washing" using in SMT production ? What's the principal and what's the purpose for ?

Thanks JJ

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#27659

Ionic washing | 18 March, 2004

Deionized water is common. Could that be what you seek?

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jj

#27660

Ionic washing | 18 March, 2004

Thanks, Dave Is that for cleaning component or PCB ?

JJ

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#27661

Ionic washing | 18 March, 2004

Water wash cleaning with a deionized water rise is used for bare boards and assemblies [and probably components also, but we're not sure]. Look here for the basics: http://www.circuitree.com/CDA/ArticleInformation/features/BNP__Features__Item/0,2133,17554,00.html

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jj

#27680

Ionic washing | 19 March, 2004

Thanks Dave

JJ

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#27682

Ionic washing | 19 March, 2004

DI water de-ionized water is an easier way to ensure washing free of contaminates. De-ionized water has a characteristic resistance of 18 meg ohms per cm squared. Resistance monitors can be installed in cascading wash systems that would monitor contaminant levels using DI water. As water becomes contaminated the resistance of the water drops. We use only RO water (reverse osmosis filtration) and a well maintained wash cascade without any problems. There may be other benefits of DI but I�m unaware of them.

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Ken

#27686

Ionic washing | 19 March, 2004

What is your typical RO memebrane rejection rate? Effluent Resistivity?

Just currious.

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