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PARYLENE ENGINEERING
Parylene Engineering
provides Parylene Conformal Coating Services and consultation
for several industries including, industrial applications,
aerospace, avionics, commercial, medical, and the defense
electronics industries.
Parylene
Engineering was established in 1995 as a parylene service
provider serving the aerospace industry. Since then, the company has
grown to serve the Aerospace, Space, Medical, and commercial
industry. The parylene coating process involves several Mil specs
including MIL-I-46058C, Typically, the parylene monomer is deposited
on substrates as a gaseous molecule that polymerizes in a vacuum
environment. The end result is a pin-hole'-free parylene film. The
film itself possesses various mechanical, thermal, and dialectical
properties.
A
Poly-para-Xylylene coating film formed by the chemical vapor
deposition (CVD) process.
The coating film is completely pinhole free and the film thickness
can be uniformly controlled in the micron range to conform to any
irregular shape, whether it has a sharp edge or a complicated
internal surface without any thermal stress.
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. Because of its unique properties,
Parylene conforms to virtually any shape, including sharp edges,
crevices, points; or flat and exposed internal surfaces.
Parylene
provides exceptional protection for the most extreme environmental
conditions. This polymer is called out as "Type XY"
coating in the MIL specs such as MIL-I-46058C, and IPC-CC-830.
Parylene is unique as it is deposited through a vacuum deposition
system, as gaseous molecules capable of providing a pin-hole free
film at 3 microns thickness. This method of application yields a
true conformal film complexion that contours all surfaces, exposed
or hidden. Further, the thickness of the Parylene film could be very
tightly controlled due to this unique method of deposition.
The Parylene
film is chemically inert, no acid or alkaline material will attack
it in any significant manner. The FDA has approved the
Parylene film for human implantable devices. The Parylene film
possesses superior dielectric properties, approaching 8000 volts for
1 mil thickness.
Usages for the
Parylene coating includes, implantable devices, fish
tags, circuit boards (SMT, Thru-hole, or mixed technology) sonar
applications, ultrasonic applications, surgical devices, and
elastomers. The Parylene coating process involves changing the
molecular structure of the Parylene dimer into a monomer, then
depositing monomers at room temperature onto the substrate to form
the polymeric chain of the Parylene film.
Parylene
coatings are completely conformal, of uniform thickness and pinhole
free.
This is achieved by a unique vapor deposition
polymerization process. The advantage of this process is that the
coating forms from a gaseous monomer without an intermediate liquid
stage. As a result, component configurations with sharp edges,
points, flat surfaces, crevices or exposed internal surfaces are
coated uniformly without voids.
Parylene has no
curing cycle, unlike other conformal coating materials. Once
deposited, it is ready to go to work.
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 aromatic hydrocarbons. Since
Parylene coating is a high molecular weight, linear, crystalline
polymer having an all carbon backbone without any oxygen, nitrogen,
or sulfur atom links in the backbone it is hydrophobic. This carbon
backbone, coupled with its substantial crystallinity, makes Parylene
quite stable and highly resistant to chemical attack.
Parylene Engineering
14842 NE 95th Street
Redmond, Washington 98052 USA
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