Moisture-proof and dust-proof technology in PCBA processing

In the manufacturing process of electronic products, PCBA (Printed Circuit Board Assembly) is a core component, and its quality directly affects the performance and life of the final product. In the process of PCBA processing, moisture-proof and dust-proof technology is particularly important. This is not only because moisture and dust can cause physical damage to the circuit board, but also because they may cause a decline in electrical performance and even cause serious functional failures. This article will discuss the moisture-proof and dust-proof technology in PCBA processing in detail.

I. Moisture-proof technology

The impact of humid environment on PCBA cannot be ignored. Moisture may penetrate into the insulating material of the circuit board, causing electrical short circuits, corrosion and other undesirable phenomena. Therefore, moisture-proof technology is crucial in the process of PCBA processing.

1. Dry storage

Materials and semi-finished products processed by PCBA must be kept in a dry environment when stored. Usually, vacuum packaging or moisture-proof bags are used to protect sensitive components. At the same time, the humidity of the warehouse also needs to be strictly controlled. It is generally recommended to keep it between 30%-50% to avoid moisture intrusion.

2. Moisture-proof coating

In PCBA processing, in order to further prevent the influence of moisture, a moisture-proof coating (such as three-proof paint) can be applied to the surface of the circuit board. This coating can not only effectively prevent the infiltration of moisture, but also protect the circuit board from dust and chemicals.

3. Low-temperature reflow soldering

The low-temperature reflow soldering process can effectively reduce the impact of moisture on PCBA. During the soldering process, lower temperatures can reduce the oxidation of solder joints and reduce the impact of water vapor generated in a humid environment on the soldering quality. This method has been widely used in PCBA processing.

II. Dust-proof technology

Dust is one of the common sources of pollution in the PCBA processing process. Dust particles may cause poor connection of solder joints or even short circuits. In order to ensure the quality of PCBA, effective dust-proof measures must be taken.

1. Dust-free workshop

In PCBA processing plants, establishing a dust-free workshop is an effective means to control dust pollution. The dust-free workshop removes dust particles in the air through an air purification system to ensure the cleanliness of the production environment. This can not only improve production efficiency, but also reduce the defective rate of products.

2. Dust-proof protective film

For some PCBA products that need to be stored or transported for a long time, dust-proof protective film can be used for packaging. This protective film can effectively prevent the intrusion of dust, and also plays a certain role in moisture-proofing, further ensuring the quality of the product.

3. Regular cleaning

Regular cleaning of production equipment and work areas is an important means to prevent dust accumulation. Especially in the PCBA processing process, any fine dust may cause product quality problems. Therefore, formulating strict cleaning procedures and ensuring their implementation is an important part of dust-proof technology.

Summary

Moisture-proof and dust-proof technology in PCBA processing is a key link to ensure product quality. Through dry storage, moisture-proof coating, dust-free workshop and other technical means, the impact of moisture and dust on PCBA can be effectively reduced. With the increasing popularity of electronic products, the requirements for PCBA processing quality are also getting higher and higher. Therefore, in the PCBA processing process, we must attach great importance to the application of moisture-proof and dust-proof technology to ensure the reliability and stability of the product.