High Dielectric Property/Heat Endurance Film/Unstressed Film/Dry Lubricant/Particle Fixation Coating/Antibiosis Film/Strong Barrier Film

Dry film lubricant -inherent excellent dry lubricity, as indicated by coefficient of friction measurements make Parylene a valuable asset as a dry film lubricant, particularly as a coating for surgical instruments. Compared to fluoropolymers, Parylene has also the ability to provide wear and abrasion resistance.
Sterilization - due to their thermal and chemical resistance, Parylene coatings can survive the conditions of many common sterilization techniques (e.g. autoclave, radiation, ethylene oxide).
Pinhole free - tough coatings as thin as 0.5 microns can be achieved without any voids. Chemical, fungus and bacteria resistance -Parylene resists attack from exposure to most acids, bases and solvents. It is an excellent inhibitor to the growth of fungus and bacteria.
Thermal stability - Parylene coatings remain stable at continuous temperatures as high as 150 deg.C in air, or 220 deg.C in the absence of oxygen. It has good mechanical properties from -200 to 275 C
Stress-free - since the polymerization of the film takes place on the substrate surface at room temperature, there is no thermal or mechanical stress introduced during application, hence original performance parameters of coated subjects are basically unaffected.
Sterilization - due to their thermal and chemical resistance, Parylene coatings can survive the conditions of many common sterilization techniques (e.g. autoclave, radiation, ethylene oxide).
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.(1mil=0.0254mm)Parylene has chemical resistance similar to Teflon. It resists attack and is insoluble in all organic solvents 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.
The unique application process and the predictable barrier properties and mechanical strength of Parylene coatings have also found other interesting applications
With a lower dielectric constant, lower dissipation factor and high dielectric strength compared to industry-standard coatings, Parylene coatings are uniquely suited for electrical insulation on miniature wire wound components. Parylene coatings also provide protection against abrasion damage that may occur during the winding process. Finally, Parylenes dry lubricity (low coefficient of friction) is also beneficial in the winding process.The use of adhesive tape as insulation between winding and metal component is a well established process however as components get smaller, application of tape becomes difficult, in many instances resulting in less yield of acceptable parts.
Coatings are thin, truly conformal, stress-free and resistant to solvent and fungal attack. Good adhesion minimizes ionic conduction at the coating-substrate interface and strengthens solder joints. Low dielectric constant minimizes loading in high frequency applications.
Good adhesion to ceramic substrates. Good throwing power enables coating within spaces as narrow as 10μ. Interior of packages may be coated via a 1mm hole - coating strengthens wire-bonds and immobilizes particles of debris such as solder balls.