- PCB plate making: After PCB design, the photoplotter will produce the actual PCB board according to the circuit diagram. Check the correctness of the circuit diagram, PCB board size, hole location, etc.
- Printing and etching: On the PCB board, print the circuit diagram. Etching is necessary after printing is finished. It can leave the circuit schematic in place and remove any extra copper foil. Inspection is necessary once etching is finished.
- Drilling and copper plating: Drill holes on the PCB board according to the circuit diagram. Then plate copper on the drilled PCB to increase the conductivity of the circuit. After the copper plating is completed, it needs to be inspected.
- Tin plating and cutting: Tin plating is performed on the PCB to protect the circuit and prevent oxidation. Then cut the large PCB board into small pieces. After the cutting is completed, it needs to be tested.
- Testing and packaging: Testing ensures the performance of the PCB board. The content of the test includes the function and performance of the circuit. Then pack the prepared PCB board to protect it from damage during transportation.
Is it true that now most manufacturers use lead-free solder while producing LEDs? What about lead solder?