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Thanks to all so far---also appreciate qualifying remarks.
> _____________________________________________
> From: Chafin, Ken G.
> Sent: Monday, October 01, 2007 3:47 PM
> To: [log in to unmask]
> Subject: Ionic Cleanliness
>
> Does any IPC Standard recommend a minimal level of PC Board, or PC
> Assembly ionic cleanliness in terms of material per square unit of
> board or assembly area?
>
> E.g. 0.2 micrograms of sodium chloride equivalent per square
> centimeter.
>
> In IPC-A-600D, section 19.1 a solvent resistively value for an
> IPC-TM-650 test is given (greater than 2 X 10 to power 6 ohm per
> centimeter is recommended).
>
> Even if an appropriate response to this question is complex can the
> question itself be answered yes or no?
>
> Thanks for any guidance.
>
>
>
> Kenneth Chafin
>
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