In the production and assembly of modern electronic products, printed circuit boards (PCBAs) are used as core components, and their transport and storage conditions are critical to ensuring the quality of the final product. In this article, we will discuss the transport and storage requirements of PCBAs, as well as the factors that affect their performance and reliability.

I. Definition and importance of PCBA

PCBA is a complete circuit module formed by soldering various electronic components on printed ci

rcuit boards (PCBs) by means of surface mount technology (SMT) and plug-in technology (THT), etc. PCBA plays an important role in electronic equipment, such as information transfer, signal processing, data computing, etc., so its quality has a direct impact on the performance and stability of the whole machine.

Second, the transport requirements of PCBA

1. Packaging requirements

Anti-static packaging: PCBA in the transport process is very susceptible to electrostatic damage, so it must be packed with anti-static materials, such as anti-static bubble bags, electrostatic shielding bags. This can effectively avoid the damage of static electricity on the components, reduce the rate of defective products.

Moisture packaging: high humidity can lead to corrosion and oxidation of PCBA, so it is necessary to use moisture-proof packaging materials, such as the use of desiccant vacuum packaging. This can keep the PCBA in the transport process of the dry state, to prevent moisture.

Anti-vibration packaging: vibration and shock may be encountered during transport, so the PCBA must be well anti-vibration packaging, you can use foam, rubber pads and other materials to ensure safety during transport.

2. Transport mode

Choose a suitable mode of transport: according to the delivery time, cost and transport distance to choose a suitable mode of transport. Generally, land transport is suitable for short-distance transport, while sea transport is suitable for long-distance transport and air transport is suitable for urgent orders.

Control the transport environment: Ensure that the temperature and humidity are within a certain range during transport, and avoid the influence of extreme weather. For sensitive materials, shipping boxes with controlled temperature and humidity may be required.

Third, the storage requirements of PCBA

1. Storage environment

Temperature control: PCBA storage temperature should be kept within 15 ℃ ~ 30 ℃ to avoid high temperature caused by component performance degradation or aging.

Humidity control: relative humidity should be maintained between 30% ~ 70%, too high or too low humidity will affect the welding performance and material stability.

Good ventilation: The storage area must be well ventilated to avoid the accumulation of odour, harmful gases and humidity and to keep the environment fresh.

2. Storage method

Layered storage: In the storage process, should avoid mixing different batches or different types of PCBA, so as not to cause difficulties in identification and confusion of accessories. It is recommended to store them in layers according to the production date and batch.

Avoid heavy pressure: avoid heavy pressure when stacking PCBAs to prevent deformation of circuit boards or dislodging of components. Specialised racks can be used for storage to ensure that the PCBA is evenly stressed.

Regular inspection: Regularly inspect the stored PCBA to ensure that there is no moisture or deformation and so on. PCBA stored for a long time should pay attention to the changes in welding performance and solder joints.

Fourth, the factors affecting the transport and storage conditions

1. Environmental factors: changes in temperature and humidity are often the most important factors affecting the quality of PCBA, good environmental control can effectively reduce the defect rate.

2. transport time: long time transport increases the risk of PCBA exposed to bad environment, so need to reasonably arrange the transport cycle.

3. the choice of packaging materials: high-quality packaging materials play a key role in the protective properties, can effectively reduce the risk of transport.

4. transport tools: choose the appropriate transport tools to ensure its stability and safety in the transport process.