How does the PCBA foundries factory weld ICs? The following are the specific steps of the welding method:
1. Clean and secure the PCB circuit board.
2. Tin on the edge of the solder pad on one side of the IC pin diagram.
3. Use tweezers to place the IC in the designated position on the PCB circuit board and secure it. Heat the pre soldered solder pads with an electric soldering iron and solder the pins.
4. Carefully check if the pin position is correct. If the position is not correct, the IC needs to be soldered again.
5. After confirming the correct pin position, solder the pins at the diagonal position of the pins to prevent the IC from moving while soldering other pins, which may cause misalignment of the IC pins.
At this point, other pins can be soldered. It is best to use a desk lamp with a magnifying glass during this process. When welding, carefully weld the wires of the IC with a pointed electric soldering iron.
7. Use a magnifying glass to check the soldering situation of the pins and whether there is any virtual soldering or bridging.
8. Bridging processing method: IC pins are densely packed, resulting in welding bridging. In this case, the solder can be absorbed and re welded after melting. Be careful not to damage the pins during this process.
9. Use a magnifying glass to check the solder joints again, ensuring that they are qualified and have no adhesive short circuits.
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