Parylene N (CAS No. 1633-22-3)

Parylene is a chemical compound applied to substrates using chemical vapor deposition (CVD). Because Parylene coating deposits onto the surface molecule by molecule, it forms a defect and pinhole-free coating with excellent conformality. Parylene resists chemicals, can protect against caustic substances, acids, and corrosion, and more. Unlike conventional conformal coatings, Parylene is ultra-thin, providing superior coverage at 50% thickness. Its adaptability is enhanced by the fact that several types of Parylene coating exist, all suited for various industrial applications.

Parylene types covered in this guide are all characterized by different chemical compositions and physical properties. When using this substance and its numerous manifestations, you’ll notice that they all have different levels of permeability, dielectric strength, and other defining qualities. Choosing the best one depends on what application you’re using it for and what substrate you’re coating.

Here are several different types explained, including the best application use.

Parylene N: Parylene N consists of a linear carbon-hydrogen molecule structure. It’s the most fundamental, basic form of Parylene, which makes it suitable for devices that see high-frequency use. This type is distinguished by its vacuum stability and low dielectric constant. When going through the deposition process, Parylene N — along with Parylene C — has a higher deposition rate than many other types. This quality makes it convenient for commercial use, although it’s not quite as widespread as Parylene C.

Read more about Parylene N: Parylene N is also halogen-free. Halogens include elements like fluorine, bromine, and chlorine. This quality generally makes Parylene N preferable to Parylene C, as some industries require the Parylene coatings they employ to be halogen-free. For example, halogens in electronics can bio-accumulate within living beings, and they can be toxic to the environment when burned.

The most common applications for this Parylene coating include the following:

Printed circuit boards: Most Parylene types protect the delicate inner workings of complex circuitry.

Elastomers: Manufacturers use Parylene N to coat elastomers, polymers with weak molecular forces.

Electronics: Most types of this material are excellent for protecting electronic devices, whether medical or non-medical.

Medical Devices

Aerospace & Defense

Electronics

LEDs

Automotive