RE: vapor deposition of urethane castings

From: Eifert, Dan (
Date: Mon Feb 05 2001 - 19:48:57 EET


Depending on the application you could apply a conductive paint as well. I
have used Choflex 601 from Chomerics as a shield layer for flex circuitry
(polyimide film). It has excellent adhesion and provided nearly as much
shielding as copper foil, more when you consider the paint coats edges and
all voids. It is a silver loaded polyurethane. Contact Ron Sacuzzo at
(800) 225-1936 if you are interested.

Dan Eifert
Electronic Packaging
Lockheed Martin M&FC-Orlando
Ph - 407/356-5789
Fax - 407/356-6725
Email -

-----Original Message-----
From: Bruce []
Sent: Monday, February 05, 2001 10:10 AM
To: RP-ML (E-mail)
Subject: vapor deposition of urethane castings


Can any of you provide contacts for vapor depositing urethane? We have a
customer that would like to create an RF shield on their prototypes and we
believe that vapor deposition would be the best route. As an alternative,
has anyone had success using "filled urethanes" to create conductive
castings? We have tried using carbon black on several occasions with mixed
results. Typically, the amount of carbon black required to achieve any
conductivity is so high that the urethane/carbon mixture becomes a thick
sludge and will not flow into the molds.

Thanks for your help,

Bruce E. LeMaster

Applied Rapid Technologies Corporation
265 Cambridge Street, Suite 100
Fredericksburg, Virginia 22405
(540)371-1100 / (540)371-4100 fax

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