HZO specializes in creating ultra-thin,pinhole-free Parylene coatings tailored for electronic applications in drones and robotics,delivering outstanding dielectric strength along wiht remarkable resistance to chemicals and corrosion.
The remarkable moisture barrier properties of Parylene coatings guarantee thorough coverage, even on intricate surfaces. These benefits arise from the unique chemical deposition method and inherent characteristics of parylene materials.
On HZO’s resource page titled ‘Parylene Coating Properties: Tables of Values, Types, & Technical Data Sheets,’ experts delve into the electrical, mechanical, optical, thermal, and corrosion-resistant attributes of Parylene coatings.
A comprehensive overview of the various types of Parylene is also provided:
Parylene coatings are available in several varieties, including Parylene C, N, F (VT-4), and high-purity options.Notably, these coatings do not produce or contain sodium, ammonium, or chloride ions.
Parylene N is a hydrocarbon polymer, while Parylene C shares the same structure but includes chlorine atoms that are covalently bonded to the polymer chain.Importantly, these chlorine atoms are not easily ionized.
Fluorinated dimers such as VT-4 provide enhanced UV and thermal resistance compared to N and C,although they are more expensive to produce. The CF2 groups in VT-4 replace CH2 connections, which boosts oxidation resistance.
The polymerization of Parylene starting materials occurs through free radical addition, resulting in no byproducts from the reaction.
Comparative Analysis of Parylene Types
Characteristics of Parylene C
Both parylene C and VT-4 are equipped with flame-retardant halogens (chlorine and fluorine), allowing these materials to extinguish flames almost immediately once the source of ignition is removed. Their flammability is evaluated through UL 94 HB and UL 94 V testing.
Characteristics of Parylene F
Parylene F (VT-4) is devoid of bromine and chlorine halogens, containing only fluorine. It demonstrates superior resistance to heat and UV radiation compared to both C and N types.
Characteristics of Parylene N
Halogen-free Parylene N is known for its distinctive dielectric properties, featuring a low and stable dissipation factor across various frequencies.
For a complete overview, download HZO’s comprehensive Parylene datasheet here>>
