Supplying military and defense conformal coatings.
The military uses
specialized equipment and communication systems for many of its functions.
There are many technologies within these systems that are strictly military
in use and have little or no applications in civilian life. Research to
develop newer and better technologies for defense of our country is an
ongoing process for the military. Conformal Coatings are critical for
the protection of military technologies, ensuring their reliability
and long life.
A conformal coating
gives physical and mechanical protection to printed circuit assemblies,
which are the core of any electronic equipment. Conformal coatings are
protect in high temperature and pressure environments ensuring the coated
equipment remains functional and reliable under demanding conditions.
Conformal coatings are also extremely good insulators. Both transparent
and pigmented conformal coatings are available.
for Military Communication Systems
communications are complex involving a wide range of uses including battle
field communications and communications with the higher command. Radio
communication systems are used for this purpose and throughout military
communication systems. Many military communication equipment systems are
built to encode and decode transmissions. They have to (by design) survive
through rough terrain in hostile climates and conditions. The reliability as
well as performance of a large variety of tactical and strategic
communications equipment used by the military is paramount. Specifically,
the voice communications systems, which has to be secure and the potential
noise sources such as cross talk have to be eliminated. These special
requirements call for a challenging PCA (Printed Circuit Assembly) layout
and design within the equipment which often relies on conformal coatings.
of the PCA (Printed Circuit Assembly) against environmental and mechanical
factors is crucial to ensure that the communications equipment is
functioning at the optimal level. Hence, conformal coatings for the PCA
is critical. Conformal coating protects the circuitry from moisture, salt
spray and humidity. It also gives protection against chemical factors like
coolants and fuel. Conformal coatings can also withstand extremes of
temperature, to which military communication equipment is subjected.
for Military Vehicles
include rugged ground vehicles, reconnaissance vehicles, aircraft carriers,
attack helicopters, fighter jets, bombers, transports and much more. All of
these vehicles include systems containing circuitry components which enhance
performance and digital information processing, enabling optimal
functionality. The PCA and related circuitry within these vehicles are
protected by conformal coatings. Certain conformal coatings can withstand
variations of pressure and temperature very well.
Coatings are commonly used in the circuitry of military aircraft where
exposure to sudden and drastic changes in air pressure is part of a normal
| Military Applications
Materials that may be
used for conformal coatings include acrylic, silicones, polyurethanes,
flouroacrylics and Parylene conformal coatings are found to be most suitable
for military applications. Parylene coatings can withstand high temperatures
and are flexible and rugged. Parylene Coatings do not have a cure phase,
eliminating exposure of critical circuitry to damaging thermal cycles. As
Parylene is a vacuum deposition coating, it is extremely conformal and
eliminates entrapped contaminates which are present with dip or spray type
conformal coatings. Parylene’s outstanding barrier properties allow for high
performance and protection at lower coating thicknesses. The lower coating
thickness adds little to no weight or stress on the coated assembly.
The Way Forward
At Parylene Inc.,
continuous and constant research is underway to improve the usefulness of
the existing conformal coatings we provide. Attempts are also being made to
identify newer and better conformal coatings. These newer products may
prove to be even more significant for military applications.