Thanks Mike, this sounds like a good idea. One question though, when do you
remove the mask, before or after cure? If before, doesn't the coating run
when heated? If after, how do you separate the tool from the coating? (OK,
three questions)
Thanks again,
Jim Marsico
Senior Engineer
Production Engineering
EDO Electronics Systems Group
[log in to unmask] <mailto:[log in to unmask]>
631-595-5879
-----Original Message-----
From: Michael Bell [SMTP:[log in to unmask]]
Sent: Thursday, January 24, 2002 2:05 PM
To: [log in to unmask]
Subject: Re: [TN] Masking for Conformal Coating
James,
Have you considered using a laser cut or milled steel/aluminium hat
that
sits ontop of the PCB. Any clearance for components can be milled
out from
the underside, and the weight of it forms a good enough seal around
the
bottom. We used this idea ffor a long time for PCB's that were
panelized.
The hats were made into a large spider web style with hats
adjointing to it.
You simply dropped it over the respective components and in one go,
we
masked about 30 components/connectors etc.
Cheers
Mike
-----Original Message-----
From: Marsico, James [mailto:[log in to unmask]]
Sent: Friday, 25 January 2002 05:24
To: [log in to unmask]
Subject: [TN] Masking for Conformal Coating
Hello again...
Looking for suggestions for removing masking material (tape or
liquid) which
is applied to mask areas from conformal coating. The way we do it
now, the
operator masks off the area (usually tape), sprays the board, cures
the
coating, scores the coating around the tape, then removes the tape.
We're
trying to eliminate the scoring of the coating since this has
potential of
cutting through traces. Removal of the coating prior to curing
doesn't work
because the coating runs during the heat cure process. I'm trying
to avoid
room temperature cure since this is very time consuming. Ant
suggestions?
Jim Marsico
Senior Engineer
Production Engineering
EDO Electronics Systems Group
[log in to unmask] <mailto:[log in to unmask]>
631-595-5879
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