Well now, you are being a bit closed minded here. Components on boards are 
only an issue if they have an underside or bottom side.  We only use parts 
with tops and sides.  And connectors are only a problem if they have 
electrical contacts.

Dewey, does the IPC-T-50 contain a definition for "hissy fit"?  I 
REALLLLLLLY want to use that in a few of my documents!!!

Doug Pauls



From:   "Stadem, Richard D." <[log in to unmask]>
To:     TechNet E-Mail Forum <[log in to unmask]>, 
"[log in to unmask]" <[log in to unmask]>
Date:   05/09/2013 09:04 AM
Subject:        RE: [TN] Automating Conformal Coating



Don't put any parts on the board. Parts are bad when conformal coating. 
Also, if you do have to put parts on the board, don't put any connectors 
on. Connectors are hard to mask and they never want coating on them. But 
if you really must have parts and connectors, don't require coating to be 
on them. But if coating must be on them, allow the coating to be peeled 
and/or bubbled and if a little bit is missing here and there, let's not 
get all hissy-fit about it. Nobody's perfect.
There, that should do it.  :-)


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
Sent: Thursday, May 09, 2013 7:41 AM
To: [log in to unmask]
Subject: [TN] Automating Conformal Coating

Good morning all,

Another conformal coating related question.  What, from an assembly point 
of view, would you tell a board designer are good design practices to make 
an assembly coatable from an automated standpoint.

I think we would all agree that having an assembly with no keep out zones 
and a constant height for components to be the ideal.  The more holes we 
poke in the film and the farther we get from the ideal, the less we can 
automate coating.

So, what would you tell a designer to do?

Or, to put the shoe on the other hand, what kinds of things should they 
NOT do, or bad practices to avoid?

And, yes, I know It Depends.

Doug Pauls


______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________




______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________