VSI Parylene Benefits, precision tweezers


VSI Parylene Benefits

VSI Parylene exploits the unique characteristics of a vapor deposition process to deposit parylene molecule by molecule. This process produces a high performance polymer coating unmatched by liquid or spray coatings.

Typical conformal coatings are sprayed or dipped, causing edges to pull away, and often creating edging, bubbles, bridging, and gapping. Due to the parylene deposition process these defects are eliminated. Typical spray or dip coatings may be acrylic, silicone, polyimide, polyurethane, or epoxy.

Applying spray-and-dip coatings to sensitive devices typically introduces thermal and mechanical stresses, which limits product quality and inhibits component design. Parylene is deposited at room temperature which eliminates any thermal or mechanical stresses on parts during deposition.

MIL-I-46058 and IPC-CC-830, Type XY approved Good adhesion properties on various substrates
FDA approved — USP XXII,
Class VI bio-compatibility rating
Low stress coating that does not form
sites prone to crack initiation
UL listed Coated components are instantly available for use
Completely pin-hole free barrier coating at 1um thickness or greater Hydrophobic
Fully conformal on any type of
surface material or design
Barrier to ionic and moisture species
Chemically inert transparent polymer – safe from acid, alkaline or solvents Chemical and fungal resistance
Meets NBC requirements
(AR70 / AFR80-38 / Navinst 3400.2)
Non-contaminating coating and coating
process — no solvents, catalysts or other
by-products are introduced during coating
Barrier to oxygen, moisture, chemicals,
solvents, and carbon dioxide
Coating process is accomplished at room temperature, alleviating temperature stress on parts
Low coefficient of friction, 0.25-0.29 makes parylene ideal as a dry film lubricant Particle encapsulation / immobilization
Extremely high dielectric of 5,600 V/mil at 0.001” minimum No outgassing (NASA approved)

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For complete information of the electrical, mechanical, and thermal properties of parylene, as well as information on gas permeability and a comparison of parylene to PTFE and other polymer-based coatings, please see our Parylene Properties page. New to parylene? Get an introduction here.