Caitlen, there is really no requirement unless you have something
conductive exposed on the edge. We only coat the substrate because it is
too difficult to mask! I coat as a service to customers from NASA to small
CMs and very rarely receive a requirement to coat the edge.

Lloyd Duso
Plant Manager
Diamond-MT
(814) 535-3505
www.Diamond-mt.com

On Thu, Mar 1, 2018 at 10:45 AM, Caitlen Gahm <[log in to unmask]>
wrote:

> Greetings,
>
> We are wondering what the general thought is regarding whether or not the
> edge of a CCA/PWB needs to be conformally coated?  We received CCA's from a
> supplier and noticed that the edges were not coated.  Our thinking thus far
> is that since our drawing does not state that coating on the edge is
> optional or not required, it would be required.
>
> What we are curious to know is what the general consensus is regarding
> whether or not it is necessary to coat the edge of the CCA and instances
> when this would or would not be desired.
>
> Thank you,
> Caitlen Gahm
> Materials and Process Engineer
> Crane Aerospace & Electronics
>