Knowledge

（1）. Environmental protection

1. Keep the board surface dry: Excessive humidity can cause electrochemical reactions, oxidation and corrosion in multi-layer board circuits, and even cause short circuits in severe cases. Therefore, the environmental requirements for using PCB multi-layer circuit boards are relatively high, so try to keep the environment dry.

2. Pay attention to dust prevention: Dust and dirt are one of the main culprits that cause multi-layer PCB circuit board failures. Once they enter the circuit board, they will cause problems such as short circuit, discharge, leakage, etc. In serious cases, they may damage the PCB circuit board.

3. Avoid mechanical damage: Do not collide or scratch the surface of the multi-layer circuit board to avoid breaking the internal circuits and causing failure. At the same time, it is also necessary to avoid excessive force and pressure to prevent flexural damage to the board.

（2）. Manufacturing process

1. Strengthen design protection: During the design stage of PCB multi-layer circuit boards, attention should be paid to preventing possible problems and relevant protection measures should be set in advance. For example, divide high-voltage and high-current lines and low-voltage and low-current lines into different levels, and try to avoid running the lines in the same way or intersecting.

2. Strict quality control: Detailed quality control is required for each link during the manufacturing process. For example, operations in manufacturing processes such as drilling, crimping, and immersion metal need to be standardized to avoid human errors.

（3）. Transportation and installation

1. Prevent collisions: During the transportation of PCB multi-layer circuit boards, it is necessary to prevent them from being damaged by collisions with other hardware or products. Therefore, circuit boards need to be installed in special packaging boxes for transportation to avoid being affected by external forces.

2. Note on braking: When transporting multi-layer circuit boards, it is necessary to brake and slow down to avoid problems such as friction and heat caused by free sliding between the boards, resulting in line deformation and other problems.

（4）. Daily maintenance

1. Regular dust removal: In order to ensure the good working condition of the circuit board, regular dust removal is required to avoid the harm of dust to the circuit board. At the same time, you can also check the appearance of the circuit board for scratches or damage.

2. Replace capacitors regularly: Capacitors are one of the more easily damaged components in multi-layer PCB circuit boards. Once the service life expires or is affected by external factors, when problems occur, they should be replaced in time.

3. Keep dry: The working environment of multi-layer circuit boards needs to be dry. Avoid keeping circuit boards in a humid environment during daily maintenance. Pay attention to moisture-proofing during the rainy season.

When using PCB multi-layer circuit boards, you need to pay attention to protection and maintenance. Starting from four aspects: environmental protection, manufacturing technology, transportation and installation, and daily maintenance, the protective measures and maintenance methods of PCB multi-layer circuit boards are elaborated in detail. These measures play an important role in ensuring the normal operation of PCB multi-layer circuit boards during use, and are also of great significance in improving the reliability and service life of electronic products.
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