Parylene is considered by many to be the ultimate conformal coating
for the protection of devices,components and surfaces in the
electronics, instrumentation, aerospace, medical and engineering
Coatings perform well as dry lubricants: static and dynamic
friction coefficients are equal and comparable to fluoropolymers
with the advantage that they also have good wear and abrasion
1. A Poly-para-Xylylene coating film formed by the chemical vapor deposition (CVD) process.
2. Parylene is a conformal protective polymer coating material
utilized to uniformly protect any component configuration on such
diverse substrates as metal, glass, paper, resin, plastic, ceramic,
ferrite and silicon.
3. Parylene provides exceptional protection for the most extreme
4. The Parylene film is chemically inert, no acid or alkaline
material will attack it in any significant manner.
5. Usages for the Parylene coating includes, implantable devices, fish tags, circuit boards (SMT,
Thruhole, or mixed technology) sonar applications, ultrasonic
applications, surgical devices, and elastomers.
6. Parylene coatings are completely conformal, of uniform thickness
and pinhole free.
7. Parylene has no curing cycle, unlike other conformal coating
materials. Once deposited, it is ready to go to work.
8. Parylene has chemical resistance similar to Teflon. It resists
attack and is insoluble in all organic solvents up to iS00C and is
resistant to permeation by most solvents with the exception of
For example, Parylene N provides particularly high dielectric strength and a dielectric
constant that is independent of frequency.Because of its high
molecular activity in the monomer state, Parylene N has the highest
penetrating power of the Parylenes, with the ability to coat deep
recesses and blind holes.
Parylene C has a chlorine atom on the benzene ring, and this results in
modified electrical and physical properties including very low
permeability to moisture and corrosive gases.The Parylene C
deposition rate is substantially faster than that of Parylene N,
resulting in reduced crevice penetration ability.
Parylene D, with two chlorine atoms on the benzene ring, has the highest
degree of thermal stability.