I agree! I meant to say that if the edges are conductive, they might need to be exposed (wait a minute... that IS what I said!) thanks, Jack On Mon, Mar 5, 2018 at 10:18 AM, Douglas Pauls < [log in to unmask]> wrote: > Well Jack, sometimes the board edges are metallized so that it serves as a > grounding path and sometimes as a thermal conduction path. In those cases, > the presence of conformal coating interferes with the function of the board > and so it should not be present. That is usually the question I ask > designers all the time - will conformal coating in Location X interfere > with the form, fit or function of the unit. If yes, then it is a keep out > zone. > > > Doug Pauls > Principal Materials and Process Engineer > Rockwell Collins > > On Mon, Mar 5, 2018 at 10:00 AM, Jack Olson <[log in to unmask]> wrote: > >> Typically the goal is to protect conductive surfaces, and board edges >> don't often have conductive surfaces (and if they do, they might need to >> stay exposed). >> >> If you have seen the board edges coated it is probably a result of the >> method that was used to coat them (spraying or dipping), not because it was >> required. >> >> >> >> On Thu, 1 Mar 2018 09:45:26 -0600, 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 >> > >