You are here: Home » Value-Add Service » Conformal coating

Conformal coating

What are the application areas of conformal coating?

In the industrial control industry, automotive electronics industry, aerospace industry, outdoor sports equipment industry, household electronics industry and other three anti-coatings because of its heat and humidity resistance, thermal shock resistance, corrosion resistance, aging resistance, flame resistance, insulation and Waterproof, rust-proof, salt spray and other properties can fully protect the circuit board.

Classification of application fields of conformal coating:

1. Electronic industry circuit board protection: Three-proof coating can protect electronic equipment from water, moisture, external chemicals and special use environments to ensure its continuous stability, such as: LED display, LED guardrail tube, solar energy, instrumentation, Power supplies, frequency converters, consumer electronics, anti-theft, anti-alarm devices, switches, etc.

2. Aeronautical circuit board protection: Three-proof coating can protect electronic equipment from water, moisture, external chemicals and special use environments to ensure its continuous stability, such as: drone systems, flight control systems, fuel control systems, Simulation test system, anti-collision guidance system, security system, etc.

3. Automotive electronics industry, such as: gasoline vapor, salt spray, brake fluid, etc. The application of electronic systems in automobiles continues to grow rapidly, so the use of conformal coatings has become an essential requirement to ensure the long-term reliability of automotive electronic devices. Such as: computer control system, air conditioning, automotive electronics.

4. Commercial Household Circuit Board Protection: Conformal coatings provide protection for electronic circuits in household appliances, making them resistant to: such as: water, moisture, insects, harmful substances in offices and homes. Such as: soybean milk machine, coffee machine, induction cooker, dryer, dishwasher, air conditioner, computer, bathroom electronics, electric car, sweeper, etc.

The Impact of Poor Conformal Coating on PCBA

In the PCBA (Printed Circuit Board Assembly) process, conformal coating is an essential part. As the demand for higher quality PCBA products continues to rise, the requirements for conformal coating have become increasingly stringent. Therefore, selecting high-quality conformal coating is crucial. However, some poor-quality conformal coatings can have many negative effects on PCBA. In the following, we will detail the impacts of poor conformal coating on PCBA.

1. Decreased Conductivity

In PCBA production, poor conformal coating can lead to decreased conductivity of the PCBA. Specifically, such conformal coating may contain certain ions, such as sodium and potassium ions, which can interfere with the PCBA circuit, affecting the normal functioning of the circuit. Additionally, poor-quality conformal coatings may damage the metal traces on the PCBA, leading to circuit breaks or short circuits, which can affect the normal operation of the device.

2. Poor Corrosion Resistance

The primary function of conformal coating is to prevent damage to the PCBA due to moisture, corrosion, and similar factors. However, poor-quality conformal coatings have inferior corrosion resistance compared to high-quality coatings, meaning that the PCBA will be more susceptible to corrosion. If the PCBA becomes corroded, the metal traces may be damaged, affecting the normal operation of the device.

3. Impaired Heat Dissipation

PCBA manufacturers generate a significant amount of heat during operation, which needs to be dissipated. If heat is not dissipated in time, it can damage the circuit and even compromise device safety. High-quality conformal coatings have good thermal dissipation properties, which help the PCBA dissipate heat more effectively. However, poor-quality conformal coatings can negatively impact the heat dissipation of the PCBA, causing the circuit temperature to rise excessively, thus affecting the normal functioning of the device.

In conclusion, poor conformal coating can have many negative effects on PCBA, potentially affecting the normal operation of the device. Therefore, selecting high-quality conformal coating is crucial to ensure the quality and stability of PCBA.