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PCB circuits board storage condition requirements

When the PCB board is shipped through the final finished product inspection vacuum packaging, for PCB circuits board of bulk orders, the PCB circuits board manufacturers will do more inventory or prepare more spare PCB parts for the customer. After each batch of PCB orders is ready, vacuum packaging will be stored. Waiting for shipment. So why should the PCB circuits board be vacuum packed? How to store PCB circuits board after vacuum packaging? How long is PCB circuits board shelf life? The following small series will give you a brief introduction.

   PCB storage method and shelf life:

   Why is the PCB circuits board vacuum packed? PCB circuits board manufacturers attach great importance to this issue. Because the PCB board is not sealed, the surface of the gold, tin and solder will be oxidized and affect the soldering, which is not conducive to production.

   So how do you store the PCB circuits board? The PCB circuits board is no more than other products, it can't be in contact with air and water. First of all, the vacuum of the PCB circuits board can not be damaged. When packing, it is necessary to put a layer of bubble film on the side of the box. The water absorption of the bubble film is better, which plays a very good role in preventing moisture. Of course, the moisture-proof beads are also indispensable. Then sort the emissions and label the PCB circuits board. After sealing, the box with PCB circuits board must be stored in a dry and ventilated place, separated from the ground, and should be protected from sunlight. The temperature of the warehouse is preferably controlled at 23±3°C, 55±10%RH. Under such conditions, the surface treated PCB circuits boards such as immersion gold(ENIG), electric plating gold, HASL(Hot Air Solder Leveling), silver plating, etc. can generally be stored for 6 months, Surface-treated PCB boards such as Immersion silver, Immersion Tin and OSP can be stored for 3 months.

For PCB boards that are not used for a long time, the PCB circuit board manufacturer should preferably apply a layer of three anti-paint on it, and the three anti-paint can protect against moisture, dust and oxidation. This will increase the shelf life of the PCB circuits board to 9 months.


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