Parylene
conformal coatings development started
in 1947, when Michael Szwarc
discovered the polymer as
one of the thermal
decomposition products of a
common solvent p-xylene at a
temperature between 700 and
900 °C. Szwarc first
postulated the monomer to be
para-xylylene which he
confirmed by reacting the
vapors with iodine and
observing the para-xylylene
di-iodide as the only
product. The reaction yield
was only a few percent, and
a more efficient route was
found later by William F.
Gorham at Union Carbide. He
deposited parylene films by
the thermal decomposition of
di-p-xylylene at 550 °C and
in vacuum below 1 Torr. This
process did not require a
solvent and resulted in
chemically resistant films
free from pinholes. Union
Carbide commercialized a
parylene coating system in
1965. |
Parylene is widely
used for:
|
-
Abrasion
protection
-
Aerospace and
Aviation Electronics
-
Barrier layers
-
Corrosion
protection for
metallic surfaces
-
Electronic
Components
-
Glass
-
Hydrophobic
coating
-
LEDS
-
Medical Devices
and Instruments
-
MEMS
-
Microwave
electronics
-
Military and
Defense Parts
-
Nanotech
-
Protection of
plastic, rubber
-
Rare Earth
Magnets
-
Reduction of
friction
-
Reinforcement of
micro-structures
-
Semiconductor
Products
-
Sensors in rough
environment
-
Silicone Gaskets
-
Wire and Cable
|