I am giving under some conditions of operation under which conformal coating
is helpful.
Rough seas and heavy winds create an aerosol of upto 50 ppm salt . i.e. 50
ppm salt suspended in air. as far inland as 10kms. If this air moves in and
around the assembly and the temp.. changes to take this air volume below dew
point - this will result in condensation of conductive electrolyte onto the
assembly.
a conformal coating may save you - I have separately mailed you some other
leads I got from friends on TN re. Hv on PCBs and environment

Anil Kher
----- Original Message -----
From: JBosserm <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, October 07, 1999 11:29 PM
Subject: [TN] No subject given


>      My company is debating the value of conformal coating in our
>
>      assemblies.  We work with high voltages in non-sealed drawer
>
>      assemblies.  The environment is not too severe, it will be indoors
but
>
>      some areas have a fair enough amount of dirt in the air.
>
>
>
>      The number one example we can think of is that the entire PC industry
>
>      works without coatings, monitors in particular.  Does anybody know
>
>      where I can get my hands on some studies for or against coating?
>
>
>
>      Jay Bosserman
>
>      MCL Inc.
>
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