The PCB board after passing the final product inspection, vacuum packaging and waiting for shipment. Why is the PCB package vacuum packed? How to store after vacuum packaging? How long is its shelf life? The following SysPCB- shenzhen PCB manufacturer gives you a brief introduction to the PCB board storage and its shelf life.
Why vacuum packaging PCB board? Although this problem is small, but it is a problem that many circuit board manufacturers attach great importance to. Because once the PCB board is not sealed, the surface of gold, tin, and solder pads will oxidize and affect soldering, which is not conducive to production.
The circuit board is not more than other products, it cannot to be in contact with air and water. First of all, the vacuum of PCB board cannot be damaged. When packing, a layer of bubble film is needed on the edge of the box. The bubble film's water absorption is relatively good. This has played a very good role in preventing moisture. Of course, the moisture-proof beads can not be less. Then sort them and label them. After sealing the box, the box must be must be separated from the wall, stored in a dry and ventilated place away from the ground, but also to avoid sunlight. The temperature of the warehouse is preferably controlled at 23±3°C and 55±10% RH. Under such conditions, the Surface Finishing of PCB such as Immersion gold, Gold Plated, HAL, and silver plated can generally be stored for 6 months, such as Immersion Silver,Immersion Tin and OSP can generally be stored for 3 months.
For PCB boards that are not used for a long time, it is best for the circuit board manufacturer to apply a layer of three anti-paint on them. The effect of the three anti-paints is to prevent moisture, dust, and oxidation. This will increase the shelf life of PCBs to 9 months.