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January 1998

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Subject:
Serial # on PCB Washing off in rinse -Reply
From:
JON MOORE <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 29 Jan 1998 08:44:21 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (65 lines) 
I have found Dow Corning 1-2577 Low VOC conformal coating , a
silicone product, to be very resistant to solvents of many varieties.  You
might try this as an overcoat.

Jon A. Moore
TRW

>>> Ferrell-2 Bobby <[log in to unmask]> 01/28/98
07:22am >>>
Hello Technetters,
Any suggestions on the following problem would be greatly appreicated.

We are manufacturing/assembling small amounts of custom boards in
house
and are having a
problem with the ink stamped serial numbers on the board.  We have
tried
several different types of coatings (epoxies, varnishes, etc.) to try
and protect the ink stampings from coming off.  The
difficulty that we are having now is that during a cleaning bath in 200
proof alchol the epoxy is
peeling off.

Does anybody out there have any suggestions as to what to use to
protect
the ink stampings.

TIA,


Bob Ferrell
NASA
MM-G1/G3
Kennedy Space Center, FL.  32899
407-867-6678

>

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