PCB assembly is a board that solders various components on the surface of printed circuit board. With the development of science and technology, people have begun to pay more and more attention to the use time of the PCB assembly circuit board and the reliability of high-frequency operation, and then the PCB assembly is also more and more paid attention to its shelf life. Under normal circumstances, the PCB assembly storage time limit is 2~10 years.
PCB assembly finished boards affecting factors of storage cycle:
1. The environmental factors
A humid and dusty environment is obviously not conducive to the PCB assembly storage. These factors will accelerate the oxidation and fouling of PCB assembly and shorten it shelf life. Generally, it is recommended to store the PCB assembly in a dry, dust-free environment with a constant temperature of 25°C.
2. Reliability of components
The reliability of components on different PCBAs also determines the shelf life of PCB assembly in a large extent. Components using high-quality materials and processes have the ability to resist harsh environments. It has a wider range of capabilities and stronger oxidation resistance. It also provides a guarantee for the stability of the PCB assembly.
3. Material and surface treatment technology of PCB
Printed circuit board materials are not easily affected by the environment, but their surface treatment process is greatly affected by air oxidation. Good surface treatment can prolong the shelf life of PCB assembly.
4. PCBA board running load
The workload of PCB assembly is the most important factor in its shelf life. High frequency and high load operation will produce continuous high impact on the lines and components of the circuit board, which is easier to oxidize under the influence of heating, resulting in short circuit and open circuit during long-term operation. Therefore, the working parameters of PCB assembly board should be within the middle range of the components to avoid approaching the peak value, so as to effectively protect PCB assembly and prolong its storage life.
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Post time: Oct-17-2022