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What is Conformal Coating?

Conformal Coating has a variety of names according to the requirements and focuses of each region and each manufacturer, such as three anti-adhesive, moisture-proof glue, insulating glue, moisture-proof paint, protective paint, protective paint, coating glue, coating glue, Waterproof glue, moisture-proof oil, three-proof oil, three-proof agent, protective agent, moisture-proof agent, conformal coating, conformal coating, conformal coating, common coating, Conformal Coating is a special formula coating for protection Circuit boards and related equipment are protected from environmental erosion, thereby improving and extending their service life, ensuring safety and reliability in use.

Under realistic conditions, such as chemical, vibration, high dust, salt spray, humidity and high temperature environments, circuit boards may have corrosion, softening, deformation, mildew and other problems, resulting in circuit board circuit failures. Conformal Coating is coated on the surface of the circuit board to form a layer of three-proof protective film (three-proof refers to moisture-proof, salt spray and mildew-proof). Circuit boards that do not use Conformal Coating may be corroded, mold growth and short circuits, etc. Failure, the use of Conformal Coating can protect the circuit from damage, thereby improving the reliability of the circuit board, increasing its safety factor, and ensuring its service life. In addition, since Conformal Coating prevents leakage, it allows higher power and closer printed board spacing. Therefore, the purpose of miniaturization of components can be met.

How to deal with Conformal Coating

Paint, spray, brush, and drench the surface of the circuit board to form a light and flexible film with a thickness of only 26-38 microns. The protective film formed by Conformal Coating can effectively isolate the surface of the circuit board from contact with the outside world, and protect the surface of the circuit from corrosion by chemicals, moisture and other dirt, thereby improving the reliability of the circuit board, increasing its safety factor, and ensuring long-term protection its service life. Using the operation process of brushing or spraying, it can insulate the circuit board from moisture, dust, corrosion, mold, prevent solder pad oxidation, prevent leakage, prevent short circuit, and can comprehensively protect the surface of the circuit board.

Because Conformal Coating prevents leakage, it allows higher power and closer printed board spacing. Therefore, the purpose of miniaturization of components can be met. Whether transparent or colored, Conformal Coating can improve the appearance of printed circuit boards, and the latter can also ensure a higher degree of confidentiality by covering components and design layouts. Conformal Coating can help quality personnel inspect and focus on changes in their products without affecting product rework. It has the characteristics of natural drying at room temperature, fast curing time, good three-proof stability, relatively cheap price, transparent color, tough texture, and easy repair.

Application scenarios of Conformal Coating

1. Civil and commercial applications

Conformal Coating provides protection for electronic circuits in household appliances, making them resistant to:

(1) Water and detergent (washing machines, dishwashers, bathroom products, outdoor electronic LED screens)

(2) Unfavorable external environment (display screens, anti-theft, fire alarm devices, etc.)

(3) Chemical environment (air conditioner, dryer)

(4) Harmful substances in offices and homes (computers, induction cookers)

(5) All other circuit boards that require three-proof protection

2. Automobile industry

The automotive industry requires Conformal Coating to protect circuits from the following hazards, such as: gasoline vapor, salt spray/brake fluid, etc. The use of electronic systems in automobiles continues to grow rapidly, so the use of Conformal Coating has become an essential requirement to ensure long-term reliability of automotive electronic devices.

3. Aerospace

Due to the particularity of the use environment, aviation and aerospace environments have strict requirements on electronic equipment, especially under the conditions of rapid pressurization and decompression, good circuit performance must still be maintained. The pressure stability of Conformal Coating is therefore widely used.

4. Sailing

Whether it is fresh fresh water or salty sea water, it will cause harm to the electrical circuits of ship equipment. The use of Conformal Coating can maximize the protection of equipment on the surface of the water as well as submerged and underwater.

5. Medical

Conformal Coating can protect electronic equipment from external chemical agents and special use environment, ensuring its continuous stability.

6. Chemical industry

7. Moisture, oil pollution, acid and alkali corrosion, salt spray

The above is the introduction of Conformal Coating. I believe that friends who have read the content must have some basic understanding of Conformal Coating. Conformal Coating is used in many of our fields. It is an important tool to prevent corrosion of components and motherboards. SINSMART also uses Conformal Coating in industrial computers. If necessary, you can consult further. It can meet the pain points of various industries!

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