How Does Bad Conformal Coating Affect PCBA?
2023/06/12
In the process of PCBA processing, three-proof conformal coatings are an inevitable part. With the continuous improvement of the quality of PCBA products in the market, the requirements for conformal coatings are also getting higher and higher. Therefore, it is very important to choose high-quality conformal coating. However, some bad conformal coatings will bring many negative effects to PCBA. Next, we will introduce the impact of bad conformal coating on PCBA in detail.
1. Decreased electrical conductivity
Bad conformal coating in PCBA production will reduce the electrical conductivity of PCBA. Specifically, the conformal coating may contain some ions, such as sodium ions and potassium ions, which will interfere with the PCBA circuit, thereby affecting the normal operation of the circuit. In addition, poor conformal coating may also damage the PCBA metal circuit, which will cause the circuit to be disconnected or short-circuited, thereby affecting the normal operation of the device.
2. Poor corrosion resistance
The basic function of the conformal coating is to prevent the PCBA from being damaged due to moisture, corrosion, etc. However, the anti-corrosion performance of bad three-proof conformal coating is worse than that of good three-proof paint, which means that PCBA will be more likely to be corroded. If the PCBA is corroded, the metal wiring will be damaged, which will affect the normal operation of the equipment.
3. Thermal performance is affected
A large amount of heat generated by PCBA manufacturers needs to be dissipated during work. If the heat is not dissipated in time, it will damage the circuit and even affect the safety of the equipment. Good conformal coating has the characteristics of good heat dissipation, which can help PCBA to dissipate heat better. However, poor conformal coating will affect the heat dissipation performance of the PCBA, causing the circuit temperature to be too high, thus affecting the normal operation of the device.
In general, bad conformal paint will bring a lot of negative effects to the PCBA patch, thus affecting the normal operation of the equipment. Therefore, it is very important to choose high-quality conformal coating to ensure the quality and stability of PCBA.
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