When the PCB boards are vacuum packaged and shipped through the final finished product inspection, general circuit board manufacturers will make more inventory or prepare more spare parts for customers for the boards of bulk orders, and then vacuum packaging and storage after each batch of orders is completed. Waiting for shipment. So why do PCB boards need to be vacuum packed? How to store them after vacuum packing? How long is its shelf life? The following pcb manufacturer editor will give you a brief introduction.

　　PCB storage method and its shelf life:

　　Why do PCB boards need to be vacuum packed? PCB board manufacturers attach great importance to this problem. Because once the PCB board is not sealed, the surface of the gold, spray tin and pad parts will be oxidized and affect the welding, which is not conducive to production.

　　So, how should PCB boards be stored? Circuit boards are no better than other products, and they cannot be in contact with air and water. First of all, the PCB board cannot be damaged by vacuum. A layer of bubble film must be placed on the side of the box when packing. The bubble film has better water absorption, which plays a very good role in preventing moisture. Of course, moisture-proof beads are also indispensable. Then classify them and place them on labels. After sealing, the box should be stored in a dry and ventilated place with partition walls and off the ground, and avoid sunlight. The temperature of the warehouse is controlled at 23±3℃, 55±10%RH. Under such conditions, PCB circuit boards with surface treatment such as immersion gold circuit boards, electro-gold circuit boards, spray tin circuit boards, silver-plated circuit boards, etc. can generally be stored 6 months, PCB boards with surface treatment such as immersion silver PCB, immersion tin PCB, OSP anti-oxidation PCB, etc. can generally be stored for 3 months.

　　 For PCB boards that are not used for a long time, the circuit board manufacturers apply a layer of three-proof paint on them. The role of the three-proof paint can prevent moisture, dust and oxidation. In this way, the storage life of the PCB board will be increased to 9 months.