The different types of Parylene Coatings: Parylene N, C, and D

Parylene coatings offer a range of properties suited to specific application needs. Each type—Parylene N, C, and D—has unique characteristics that make it ideal for different environments and requirements. Here’s a closer look at what sets these types apart:

 Parylene NParylene CParylene DTesting Method (ASTM)
Dielectric Strength (volts/mil)700069005500D149
Dielectric
Constant
60Hz2.653.152.84D150
1 kHz2.652.832.82
Dissipation
Factor
60Hz0.00020.0270.004
1 kHz0.00020.0150.003
Volume Resistivity (Ω-cm)1.4 x 10176.9 x 10162 x 1016D257
Surface Resistivity (Ω)1.0 x 10132.2 x 10155 x 1016
Coefficient of Friction0.250.290.33D1894
Service Temperature90°C110°C120°C

Please inquire for a table of additional properties.

Common applications

Parylene N

The pure base polymer known for maximum penetration and highest dielectric strength. Ideal where geometry is complex, fine wires, sensors, optics, and microstructures.

  • Highest dielectric strength per thickness
  • Best conformality and edge coverage
  • Excellent surface penetration and adhesion
  • Transparent and non-yellowing

Parylene C

The industry standard for balanced protection. Offers a tight moisture and chemical barrier with proven reliability in e

  • Superior resistance to moisture and solvents
  • Low permeability to gases
  • Biocompatible and biostable
  • Strong, flexible, and reliable over time

Parylene D

Designed for thermal and chemical endurance in harsh environments. Chosen for aerospace and industrial electronics where stability matters most.

  • Continues service up to 200℃
  • Maintains dielectric strength under heat and stress
  • Excellent adhesion on metals and polymers
  • Durable film with minimal degradation

Applications

Real-world uses of parylene coatings