Parylene materials

PRODUCT PARAMETERS

Parylene is the generic name for the poly-para-xylylenes.These Parylene materials form linear, highly-crystalline polymers but can be usefully produced only as coatings and films. The most commonly used is Parylene C, the mono-chloro substituted compound. Parylene N, the un-substituted compound, has better high-frequency dielectric properties, better penetrating power for coating the bore of very small diameter tubes, and is often preferred in medical applications. Parylene D, the di-chloro-substituted compound, has better high temperature endurance.

The Parylene Coating Process

The Parylene process is unique in coating technology and is best described as a vapor deposition polymerization. It is carried out under vacuum and requires specialized equipment.

1. The process begins with sublimation at about **0°C of the high purity crystalline dimer di-p-xylylene.