Electronic Assembly Three Anti-coating Process

- Oct 10, 2019-

The environment is not only closely related to human life, but also has a major impact on the service life and stability of electronic equipment. Among many environmental factors, moisture, salt spray and mold directly threaten the use and storage of electronic products. High-tech products, especially military weapons and equipment, aerospace, navigation, power, electricity, automobiles, and all electronic equipment that work in the wild, especially in humid environments, are more susceptible to these factors due to the particularity of their use environment. influences.

The three anti-coating process is called Conformal Coating in IPC-A-510D.

The so-called "three defenses" usually refer to the prevention of damp heat, salt spray, and mold. But this is a narrower understanding. In fact, the meaning of "three defenses" far exceeds these three contents. For example, it also has anti-vibration, anti-friction, improved insulation strength, prevents printed circuit assembly board (PCBA) failure, guarantees and prolongs the service life of the product. Coating technology is widely used in strategic defense systems, aerospace systems, automotive electronics and power systems, industrial control systems, and more. Coating technology is also used in civilian products to extend the life of the product.


The three anti-protective coating process of the pcb electronic assembly is at the back end of the PCBA. Generally, after the test is completed, the three anti-treatment processes are performed, and the treatment process includes various methods such as dip, brush, spray, and selective coating. The selective coating process is a new type of protection technology for electronic assemblies, also known as conformal coating process.

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