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April 2000

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Subject:
Re: Cleanliness of boards
From:
Brian Ellis <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 10 Apr 2000 19:38:26 +0300
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text/plain (47 lines) 
Cecilia

As a general rule 1 uS-cm is just fine. I have many customers who change their mixed bed columns at between 1 and 5, even for very hi-tech stuff. Of course, a lot depends on the application, the type of assembly and the
drying process (you can tolerate a higher conductivity if you rotary air-knife rather than evaporate).

Brian

"Cecilia Alkhagen (EMW)" wrote:

> Hello!
>
> I have a question to those of you using water as a rinse medium in cleaners:
>
> What level of conductivity in water do you accept if you use water to rinse boards in an inline cleaner? In IPC-AC-62A p 12 the recommended level is 1 microsiemens/Cm if one is to conformally coat the boards afterwards.
>
> Kind regards,
>
> Cecilia
>
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