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PCB circuit board baking method and storage method

2019-08-23 09:53:56
Baking can eliminate the internal stress of the PCB, which is to stabilize the size of the PCB. The baked board has a relatively large improvement in warpage.

PCB baking method

(1), large circuit board (16 PORT and above contains 16 PORT), flat and placed, 30 sets of multiple stacks, open the oven within 10 minutes after baking, take out the PCB and lay it down to cool naturally (requires pressure to prevent the bay fixture) . PCB products are used in Security Products.

(2), small and medium-sized circuit board (8PORT and below 8PORT) is placed flat, a stack of 40 pieces, the number of upright type is not limited, the oven is opened within 10 minutes after baking is completed, the PCB is placed flat and naturally cooled (requires pressure protection) Banwan fixtures)

Preservation and baking of circuit boards in different regions

The specific storage time and baking temperature of the PCB circuit board are not only related to the manufacturing capability and manufacturing process of the PCB manufacturer, but also have a great relationship with the region. PCB products are used in LED products.

The PCB made by the OSP anti-oxidation process and the pure immersion gold process generally has a shelf life of 6 months after packaging, and is generally not recommended for the OSP process.

The storage and baking time of PCB circuit boards has a great relationship with the area. The humidity in the south is generally heavy. Especially in Guangdong and Guangxi, there will be “returning to the south” weather in March and April each year. It rains every day and it is very humid. The PCB must be used up within 24 hours when exposed to the air, otherwise it will be easily oxidized. After normal opening, it is good to use up to 8 hours. For some PCBs that need to be baked, the baking time is longer. In the northern regions, the weather is generally dry, the storage time of the circuit board will be longer, and the baking time can be shorter. The baking temperature is generally 120 ± 5 ° C baking, baking time is determined according to the specific circumstances. High Temperature PCB supplier china.

For the PCB board storage time, baking time temperature, specific analysis of specific problems, on the basis of PCB management and control specifications, according to the different Shenzhen circuit board manufacturers' production capabilities, technology, geography and seasons, to choose.