Parylene AF4 Polymer: Advanced Coating for Best Performance

Parylene AF4 Polymer

Parylene finds widespread use in various applications like aerospace, automotive, medical, semiconductor, and electric. It is a polymer that is best-suited for conformal coatings because of its inert nature. Parylene is an excellent barrier coating, and therefore, it has rapidly found use in tiny coating parts, for example, circuit board components.Parylene AF4 Polymer is superior to most liquid-based coatings like acrylic or silicone. The parylene is an excellent coating for protecting aerospace PCBs and many other electronic components and assemblies. The encapsulation conforms amazingly on all kinds of device surfaces, including edged services, complex creviced services, flat or round surfaces. Another plus point of the polymer is that the coating does not increase the weight of the coated device in anyways.

YSMTC Fluorinated Parylene AF4 : CAS : 3345-29-7

Pin Hole Free Low Gas Permeability

Moisture Prevention Dielectric Electrical Insulation Coating

Low Water Absorption Mechanical Strength Reinforced

High Dielectric Strength Biocompatibility

Process of Making Parylene AF4 Polymer Coating

The process is the unique chemical vapor deposition (CVD) process. Gaseous parylene is applied deep within the printed circuit board surfaces. The result is an authentic ultra-thin conformal coating.

Advantages of Parylene AF4 Polymer:

One of the biggest advantages of this polymer coating is that it contributes to extending the PCB’s life, and therefore, the functional aspects of the printed circuit board. The coating adheres to the surface with great strength and can be used for interior coating as well. Parylene has a low dielectric constant that minimizes high-frequency loading and offers great strength to circuit links, wire bonds, and solder joints. Also, parylene coatings help minimize the substrate-interface ionic conduction. It is highly resistant to solvents, chemicals, and fungi.

The best part is that parylene fits well in tiny parts and exceptionally small spaces.

Parylene AF4 Polymer is MIL-I-46058 or military specification conformal coating. That is why this coating is best suited for aerospace assemblies. Parylene is durable, lightweight, hydrophobic, resilient, can endure 100-hour salt spray test, and comes with the promise of long-term durability and, therefore, the best material for use on aerospace components and parts. Parylene coating offers exceptional and optimized protection to aerospace full-device service life.

Parylene AF4 Polymer helps protect MEMS or microelectronic applications. The polymer coating is best advised for the cockpit, sensor systems, flight control, and engine management applications. All the printed circuit boards coated with the polymer have unparalleled high thermal stability and can rightly meet the challenges associated with UV degradation of LED lighting of the aircraft. There is no doubt that the AF-4 polymer is extremely good as an advanced aerospace solution with the promise of enhanced performance and reliability

To know more about Parylene AF4 Polymer, speak to experts at Dawntech.

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