1. Design the circuit diagram: determine the circuit connection, component package and layout in the circuit diagram.
2. Layout design: PCB layout design according to the circuit diagram.
3. Connection wiring: Connect all components in the circuit through wiring.
4. Generate manufacturing file: export the designed PCB file as a manufacturing file.
5. Manufacturing pretreatment: pretreatment according to manufacturing documents.
6. Exposure and development: the information in the manufacturing document is transferred to the photosensitive cover layer, and then the circuit pattern is formed through the process of exposure and development.
7. Etching: The copper not protected by the covering layer is etched away by the acidic solution, thus forming wires and connection points on the circuit board.
8. Drilling: Use a drill bit to drill and position the PCB, so as to install components in the following steps.
9. Surface treatment: carry out surface treatment on PCB as required.
10. assembly: use automatic or manual surface assembly equipment to accurately weld components to PCB.
1 1. welding: soldering components and PCB together by wave soldering, hot melt soldering or reflow soldering.
12. Testing and quality inspection: testing and quality inspection of the manufactured PCB to ensure that the PCB works normally and meets the specification requirements.
The equipment required for PCB manufacturing mainly includes:
1. Electronic Design Automation (EDA) software: used for circuit diagram design and layout design.
2.PCB manufacturing machine: including exposure machine, etching machine, drilling machine, surface treatment equipment, etc.
3. Component mounting equipment: it can be divided into manual mounter and automatic mounter, which are used to mount components on PCB.
4. Welding equipment: such as wave welder, hot melt welder or reflow oven, used to weld components to PCB.
5. Test equipment: used to test the electrical performance and reliability of PCB.