Deja Vu. Haven't we been here before?

Regards,
Graham Naisbitt

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WEB: http://www.concoat.co.uk

CONCOAT Ltd
Alasan House, Albany Park
CAMBERLEY GU15 2PL UK

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----- Original Message -----
From: Grant Emandien <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, March 20, 2000 10:24 AM
Subject: [TN] Coating of assemblies with no clean fluxes


> Hi all,
>
> The debate on cleaning of fluxes as well as the use no-clean fluxes seems
to
> hang around forever. We have been informed by our solder an flux supplier
> that assemblies with no clean fluxes can be conformally coated without the
> need to clean the boards.
>
> The argument is that the high temperatures of the reflow oven 'burns off'
> the active ingredients, leaving only inactive residues. These flux
residues
> do not have to be cleaned and can supposedly be coated. The rep. believes
we
> are taking a backward step by possibly opting to use water-based flux. Is
> this pure sales talk?
>
> Is anyone able to offer any advice or insight, or been able to assess the
> environmental and electrical performance of such assemblies.
>
> Regards
> Grant
>
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