Different Types of Parylene Coatings: Features and Uses
Parylene is the common generic name for poly-para-xylylene. It forms a protective plastic film when applied to substrate surfaces. These films are highly durable and safeguard substrates with a dependable barrier layer against water vapor, caustic solutions, and many other contaminants. There are many different types of Parylene such as Parylene D, Parylene AF4 Polymer , Parylene C and Parylene N . Parylene N Parylene N is a basic form of Parylene, made up of a linear carbon-hydrogen molecule structure. It is characterized by its vacuum stability and low dielectric constant. It is also halogen-free, which makes it preferable over Parylene C in some industries where halogen-free Parylene is required. The most common applications for polyethylene N are printed circuits, elastomers, and medical and non-medical electronics. Parylene C Parylene C has very low permeability to moisture, corrosive gases, and chemicals. Due to its low permeability, it provides superior protection agains