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Advantages of Parylene, why are they well received by the market?
2019-06-04
来源：亚科官网
Parylene is a common name for a series of unique polymers. It is a completely linear, highly crystalline structure. Parylene is a protective polymer material that is formed into a protective film by vacuum vapor deposition. The film has the characteristics of uniform thickness, dense pinhole-free, transparent and stress-free, and has excellent electrical insulation and protection.
Features of Parylene
1. Vapor deposition: the only vapor deposited polymeric material for industrial applications.
2. Complete conformality of complex surface: Due to the vapor deposition process, the gaseous monomer is cleavage into a radical and directly polymerizes into a solid polymer film on the solid surface, so on the surface of the coating material, no matter how complicated the morphology is, it can be pervasive.
3. Nanoscale: According to the concentration of gaseous monomer and the polymerization time of sedimentation, a uniform controllable thickness of the coated film can be obtained, and the thickness thereof is 0.1-10 micrometers, or even tens of nanometers.
4. Corrosion resistance: The composition of the film is a polymer material of parylene. The water and gas permeability are extremely low, and it is waterproof, salt spray resistant, acid and alkali resistant, and oxidation resistant.
5. Insulation performance: It has low dielectric loss and high dielectric strength, high mechanical strength and low friction coefficient, and is suitable for most electronic products.
6. Others: transparent, stress-free, strong toughness, low friction coefficient, no additives, no damage to the workpiece, compared to the low cost and high efficiency of nylon or Teflon coating process.
Types of Parylene
Parylene is a molecular grade coating material developed by American Union Carbide in the mid-1960s. It is the common name for the unique poly-P-xylylene polymer series, depending on the molecular structure. It can be divided into Parylene N, C, D, HT, F type and other types.
Parylene N is a good dielectric material with very low dielectric loss, high dielectric strength, and dielectric constant that does not vary with frequency. It is the most penetrating of all Parylenes and has good self-lubricity with a coefficient of friction of 0.25. It meets the requirements of ISO-10993 biological test and meets the biological test requirements of UDP Class VI plastics.
Parylene C is the second commercially valuable member of the series. It combines good electrical and physical properties and has low permeability to moisture and other corrosive gases. It can provide true pinhole-free isolation and meet the US military standard MIL-46058C, which is the material of choice for coating important circuit boards. It meets the requirements of ISO-10993 biological test and meets the biological test requirements of UDP Class VI plastics.
Parylene D, similar in nature to Parylene C, but with higher heat resistance. It still has excellent dielectric properties and physical and mechanical properties at higher temperatures.
Parylene F, its film has high dielectric strength and low dielectric constant, and has good thermal stability and UV resistance. The film itself is continuous, dense, and pinhole-free, and can be used as a protective film for various complex shaped electronic devices.
Parylene HT, this material has a lower dielectric constant, good stability and water, mildew, salt spray resistance. Short-term temperature resistance up to 450 °C, long-term temperature resistance up to 350 °C, and has a strong UV resistance. More suitable as a protective material for high frequency microwave devices. It meets the requirements of ISO-10993 biological test and meets the biological test requirements of UDP Class VI plastics.
Type | Structure |
Parylene N | .png) |
Parylene C | .png) |
Parylene D | .png) |
Parylene HT |  |
Parylene F |  |
In addition to excellent protection, Parylene coating also has good biocompatibility, bio-stability, excellent self-lubricity, uniform controllability of coating, and good physical and mechanical properties. Over the years, it has been widely used in aerospace, microelectronics, semiconductors, sensors, magnetic materials, medical equipment, cultural relics protection, etc., and has slowly penetrated into people's daily lives.
Related links: Parylene D
Edited by Suzhou Yacoo Science Co., Ltd.
