PCB Technical - Baking plate process in PCBA processing

Before PCBA processing, there is a process that many PCBA one-stop service providers will ignore, and that is the baking sheet. The baking sheet can remove the moisture on the PCB circuit board and electronic components, and after the PCB circuit board reaches a certain temperature, the flux can be better combined with the components and pads, and the welding effect will be greatly improved. Let me introduce to you the baking process in PCBA processing.

One. Instructions for PCBA processing baking sheet:

1. PCB circuit board baking requirements: the temperature is 120 ± 5 degree Celsius, generally bake for 2 hours, start timing when the temperature reaches the baking temperature. Specific parameters can refer to the corresponding PCB circuit board baking specifications.

2, PCB board baking temperature and time setting

(1) PCB sealed and unpacked within 2 months of the manufacturing date for more than 5 days, baked at 120±5 degree Celsius for 1 hour; (2) PCB manufactured within 2 to 6 months, baked at 120±5 degree Celsius Bake for 2 hours; (4) PCBs with a manufacturing date of 6 months to 1 year, bake for 4 hours at a temperature of 120±5°C; (5) PCBs that have been baked must be processed within 5 days, and unprocessed PCBs need to be processed again Bake for 1 hour to go online; (6) PCBs that are more than 1 year old from the manufacturing date, bake at 120±5°C for 4 hours, and re-spray tin to go online.

3, PCBA processing and baking method

(1) Large PCBs are mostly placed horizontally, stacking up to 30 pieces, take out the PCB from the oven within 10 minutes after the baking is completed, and let it cool down naturally at room temperature.

(2) Small and medium-sized PCBs are mostly placed horizontally, with a maximum of 40 pieces stacked, and the number of vertical types is not limited. The PCB board is taken out of the oven within 10 minutes and placed flat at room temperature for natural cooling.

4. The electronic components that are no longer used after rework do not need to be baked.

2. PCBA processing and baking requirements:

1. Regularly check whether the material storage environment is within the specified range.

2. The staff must be trained.

3. If there is any abnormality in the baking process, the relevant technical personnel must be notified in time.

4. Anti-static and heat insulation measures must be taken when touching materials.

5. Leaded materials and lead-free materials need to be stored and baked separately.

6. After baking, it must be cooled to room temperature before it can be put on line or packaged.

Three, PCBA processing and baking precautions:

1. You must wear heat-insulating gloves when your skin touches the PCB board.

2. The baking time must be strictly controlled, not too long or too short.

3. The baked PCB board must be cooled to room temperature before it can go online.

The above is the baking process in PCBA processing. The PCBA processing plant will continue to improve the quality and provide customers with the highest quality PCBA one-stop processing service.