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October 2010

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Wed, 20 Oct 2010 22:46:36 +0200
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Well, it depends..

example 1: boards sensitive to water ingress via edges: we used multilayers 
of cc along edges
example 2: boards with rough edges damaged the rack slides: we used cc along 
edges
example 3: boards with smooth edges, no harsh environment: we did not use cc 
along edges
there are more examples of course

Conformal coating the edges was tricky, because of the sharp edges. The 
viscosity was therefore very important. Someone mentioned Parylene, that one 
has no such problem. Parylene is a dream stuff.

Lately, we have skipped edge coating, except when the customer wants it.


I had a look into MoonMan's POD, which covers most about PCB manufacturing. 
Strange enough, nothing about edge coating.

Inge

----- Original Message ----- 
From: "Douglas Pauls" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, October 20, 2010 8:20 PM
Subject: [TN] Conformal Coating Board Edges


> Good afternoon all,
>
> I am glad we all appreciate Inge and the time he puts into making this a
> fun and interesting forum.  To sum up: Ditto.
>
> I have a question related to conformal coating, a sort of survey.  For
> those of you that conformally coat your assemblies, do you coat the edges
> of the boards?  Why or why not?
>
> There is an internal debate here and I wanted some other viewpoints before
> offering my own.
>
> Doug Pauls
> Rockwell Collins
>
> ______________________________________________________________________
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