May I add another 2 eurocents worth?

It will also depend on how the coating is applied. If sprayed, edge 
coating is uncontrolled, unless specific measures are taken. If dipped 
liquid or paraxylylene, it is inevitable, unless masked, an extra 
operation. If liquid dipped, a very slow controlled withdrawal speed is 
essential to prevent an accumulation along the bottom edge.

In the case of punched or other rough edges, an advantage of deliberate 
coating is that it will reduce the risk of loose fibres floating around 
the housing in its lifetime. This may be important if there are fine 
mechanics exposed to them.

Doug, I'll respond to your other message, possibly within a day or so; 
I'm ultra-occupied today as I have family coming.

Brian

On 26.03.2013 17:42, Douglas Pauls wrote:
> OK, the conformal coat question of the day:
>
> Do you conformally coat the edges of a printed circuit assembly?  Why or
> why not?
>
> OK, that is two questions, or perhaps a half fractional question.....
>
> Doug Pauls
>
>
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