October 1, 2007

I recently reviewed an OEM'S ESD control procedure that required cleaning 
solvents to be conductive for use on any ESD sensitive assembly.  i also 
seem to recall reading this same requirement in some ESD specification.

Using conductive cleaning solvents does not seem like the right technical 
thing to do.  Although it may help regarding ESD protection, seems to me we 
are at greater risk in event some of the solvent remains on the assembly 
after the cleaning process.

Normally, our OEM'S use DI water and/or alcohol for cleaning non-rosin based 
flux and for RMA flux, a solvent like Terpene with DI water or a saponifier 
and DI water.

Are the aforementioned solvents conductive?  I don't believe DI water should 
be since it should not contain ions.

Any info on this topic would be of use.  Thanks.

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