Parylene AF4 is a type of fluorinated parylene, which is used to manufacture various sensors, pressure sensors, etc. on aircraft, protecting sensors from high temperature, strong ultraviolet rays, high humidity and other adverse environmental factors, ensuring their stable operation under flight conditions, and providing reliable data support for aircraft safety. The good dielectric properties of this material can reduce signal interference and distortion when the sensor is transmitting high-frequency signals, and ensure the accuracy and stability of sensor signals in key systems such as communication and navigation. In recent years, Parylene AF4 has become one of the irreplaceable materials in the aerospace industry due to its superior chemical stability, electrical insulation, moisture resistance and corrosion resistance.

So what scenarios is FCD Parylene AF4 mainly used in the aerospace industry, and what role does it play?

1. Printed circuit board protection

Parylene AF4 can form a uniform, ultra-thin protective coating on the surface of aerospace printed circuit boards through chemical vapor deposition technology, closely fitting to surfaces of various shapes, with almost no weight increase, effectively preventing erosion by moisture, salt, mold, etc., enhancing solder joints, circuit connections and wire bonding, improving the service life and performance of circuit boards, and ensuring the stable operation of complex electronic systems.

2. Protection of MEMS

MEMS in aerospace, such as multi-layer circuit instruments in cockpits, engine management, flight control and sensor systems, can benefit from the excellent thermal stability of Parylene AF4 coating, and can work stably in the temperature range of 80℃ for a long time to 450℃ for a short time. Its low dielectric constant and dissipation characteristics can also ensure the accuracy of wireless device signal transmission and the stability of inter-device communication.

3. UV protection

LED lighting systems in aerospace, such as cabins, landing gear and navigation lighting, use Parylene AF4 coating to filter ultraviolet rays and prevent LEDs from yellowing and surface discoloration due to long-term exposure to ultraviolet radiation, so as to ensure its performance as an energy-saving and long-lasting light source. Compared with other types of Parylene, AF4 can provide 2000 hours or more of ultraviolet protection under thinner coating.

4. Protection of communication and electronic systems

Communication and electronic systems in aerospace, such as flight control units, inertial sensors, navigation boards, etc., are often exposed to extreme temperatures, vibrations and flying particles. Parylene AF4 is mechanically attached to the substrate to protect these systems. Its dielectric properties can also prevent crosstalk and interference between devices and ensure the normal operation of the system.

5. External circuit protection

The circuits in the external parts of the aircraft, such as the wings and tail, are in an environment that changes rapidly and is difficult to control. Parylene AF4 coating can provide reliable protection for these external circuits, ensuring that the aircraft can operate normally under different air pressures and temperatures from sea level to high altitude.

6. Excellent protection performance

Through chemical vapor deposition, a continuous, uniform, and dense film layer can be formed on a complex surface, which is effectively waterproof, moisture-proof, dust-proof, and salt spray-proof, and resists the erosion of precision instruments by harsh environments.

7. Good thermal stability

It can withstand high temperatures of 450°C in a short period of time and 350°C in a long period of time. It can work stably in high temperature environments to ensure the normal operation of high-temperature components in aerospace and other fields.

8. Excellent dielectric properties

It has extremely low dielectric constants and low dissipation factors, and performs well in the protection of high-frequency microwave devices, which can ensure the stability and reliability of signal transmission and prevent crosstalk and interference between devices.

9. Good mechanical properties

The coating is transparent, lightweight and ultra-thin, with a low friction coefficient, good dry lubricity and wear resistance. It can stabilize components and structures, fix particles, and enhance solder joints, circuit connections and wire bonding.

10. Strong chemical stability

It is chemically inactive, insoluble in common solvents, not easily corroded by chemicals such as acids and alkalis, and can maintain stable performance for a long time in a variety of chemical environments.

11. Good biocompatibility

It meets the USP CLASS VI standard and ISO-10993 biological test requirements, has good biological stability, and is widely used in medical devices and other fields with high biocompatibility requirements.

12. Strong UV protection

It is the only type of parylene with long-lasting UV resistance, which can resist UV radiation for a long time, prevent material aging, discoloration and performance degradation, and is suitable for outdoor or aerospace parts with UV exposure risks.

At present, FCD is the only manufacturer in the world that can supply parylene AF4 powder materials to the market in large quantities. It independently develops, produces and sells a full range of Parylene powder materials. Whether in terms of technical strength, production and supply capabilities, or market layout, it can provide customers with reliable and high-quality products and services.