Thanks for the response, Dave, but could you elaborate? Will the
permeability be affected? How about the Modulus? Will the TCE change?
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: David Douthit [SMTP:[log in to unmask]]
Sent: Monday, January 28, 2002 7:49 PM
To: [log in to unmask]
Subject: Re: [TN] Conformal Coating
Jim,
You have chemically altered the polymer. It will no longer perform
it's designed function.
David A. Douthit
Manager
LoCan LLC
"Marsico, James" wrote:
> Help! Emergency!
>
> We have a completed assembly (top assembly with many boards,
hybrids, etc.)
> ready for shipment to our customer (space product). The last
operation was
> to ink mark a S/N. The ink is cured at 150 F for 2 hours. The
assembly was
> put in an oven at 150 C for two hours. After hours of reviewing
all of the
> materials and bill of material, component by component (component
data,
> supplier phone calls, etc.), the only item that is not rated for
150 C is
> the polyurethane conformal coating, which turned yellow/brown in
color. Can
> anyone explain what actually happened to the coating and if it can
be used
> as is?
>
> Thanks,
>
> 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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