PCBA is a printed circuit board with various components welded on the surface. More people pay attention to the reliability of its long time and high frequency operation and need to know its storage life. In general, the preservation period of PCBA is 2-10 years, which is mainly affected by the following factors:
Wet and dusty environment is obviously not conducive to the preservation of PCBA. These factors will accelerate the oxidation and smudgy of PCBA and shorten the shelf life of PCBA. In general, PCBA is recommended to be stored in a dry, dust-free space with a constant temperature of 25 ℃.
2.Reliability of components
The reliability of components on different PCBA also determines the shelf life of PCBA to a large extent. Components with high-quality materials and processes have the ability to withstand harsh environment, with a wider range of capabilities and stronger oxidation resistance, which also provides guarantee for the stability of PCBA.
3,printed circuit board material and surface treatment process
Printed circuit board material itself is not easily affected by the environment, but its surface treatment process is greatly affected by air oxidation. Good surface treatment can extend the shelf life of PCBA.
4.Operating load of PCBA board
The running load of PCBA is the most important factor for its storage life. The operation of high frequency and high load will have a continuous high impact on the circuit and components of the circuit board, which will be more easily oxidized under the influence of heat, resulting in short circuit and circuit break in the long-term operation. Therefore, the operating parameters of PCBA board should be within the range of the intermediate value of the components and avoid being near the peak value. In this way, PCBA can be effectively protected and its storage life can be extended.
The preservation period of PCBA is a comprehensive work, which needs to follow scientific design specifications, production process specifications and operation specifications, so as to extend the preservation period to the greatest extent.