forgot to tell what was the reason for stopping edge coating: the UV curing
did not work well, and the conveyor band became full of sticky coatin
droplets....(did not happen to oven curing of course)
----- Original Message -----
From: "Inge" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, October 20, 2010 10:46 PM
Subject: Re: [TN] Conformal Coating Board Edges
> 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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