A infrared PCBA coating is a protective material that covers the surface of a printed circuit board assembly (PCB). It is through a specific coating process to evenly apply the coating to the circuits, components and other parts of the PCBA to play a protective role.

Main features

• Protection:It can effectively isolate moisture, dust and chemicals from the outside world. For example, in a humid environment, prevent water vapor from contacting the circuit board and causing a short circuit; In situations where there is a risk of chemical corrosion, avoid damage to the PCBA caused by corrosive gases or liquids.
• Insulation properties:Enhance the insulation of PCBAs, reduce the risk of failure due to accidental conduction between electrical components, especially in high-voltage operating environments, and ensure the safety and stability of circuits.
• Improved stability:Provides physical protection for electronic components and mitigates the impact of mechanical factors such as vibration and collision on components and wiring connections, thereby extending the life of PCBAs.

Common coating materials

Organic coating materials

• For example, acrylic coating, with good flexibility and transparency, easy to coat, fast curing speed, is often used in electronic products with high requirements for appearance and flexibility.
• The polyurethane coating has excellent abrasion and chemical resistance, and can play a protective role in harsh environments, and is suitable for industrial equipment and other fields.

Inorganic coating materials:For example, ceramic coatings, which have the characteristics of high temperature resistance and high hardness, can be used in high-temperature working environments or PCBA protection with high hardness requirements.

Coating method

• Spray coating:Use a spray gun to atomize the paint and spray it evenly on the PCBA surface. This method is suitable for large-scale production and has high efficiency, but it has high requirements for equipment and operating environment to ensure uniform spraying.
• Dip-coating:The PCBA is completely immersed in the paint to allow the paint to adhere well to the surface, and then cures by natural drying or tumble drying. This method ensures full coating coverage, but may require additional treatment for some special structures or components.
• Brush coating:Applying paint to a PCBA with a brush is simple but less efficient, and the uniformity of the coating is difficult to control, so it is generally used for low-volume production or spot repairs.