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Conformal coating using parylene polymers.

J Noordegraaf¹

¹Nova Tran Ltd., Northampton, UK.

Medical Device Technology

|December 8, 1996

Summary

Parylene, a conformal polymer, offers environmental and dielectric isolation for electronics, sensors, and medical uses. This article details parylene variants, characteristics, coating processes, and applications.

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Area of Science:

Materials Science
Polymer Chemistry
Surface Engineering

Background:

Parylene is a conformal polymer film increasingly utilized in Europe.
It provides essential environmental and dielectric isolation.
Key application areas include electronic circuitry, sensors, and medical substrates.

Purpose of the Study:

To describe the different variants of parylene.
To outline the unique characteristics of each parylene variant.
To detail the parylene coating process and its diverse applications.

Main Methods:

Review of existing literature on parylene.
Analysis of parylene variants and their properties.
Description of the chemical vapor deposition (CVD) coating process.
Compilation of current and emerging applications.

Main Results:

Parylene offers excellent barrier properties and biocompatibility.
Different parylene types (e.g., Parylene N, C, D, AF4) exhibit distinct dielectric and physical characteristics.
The CVD process allows for uniform, pinhole-free coatings on complex geometries.

Conclusions:

Parylene coatings are versatile and effective for demanding applications.
Understanding parylene variants is crucial for selecting the appropriate material.
Continued innovation in parylene technology promises expanded use in advanced fields.

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