1、 Design phase

1. Preliminary design. The first step in PCB design is to determine the circuit diagram, select components and connect circuits based on the functional requirements of the product.

2. Perform PCB layout. Layout design is the first step after completing circuit design, which requires determining the approximate size and shape of the PCB board, as well as the approximate positions of various components on the board.

3. Wiring design. Designers need to design the connection method and path of the circuit at each layer of the PCB, which is called wiring design.

2、 Material preparation stage

1. Select the substrate. Before starting the production of PCB multilayer boards, it is necessary to choose a suitable substrate, usually fiberglass board.

2. Make copper foil. Copper foil is the most important conductive material in PCB, and thickness selection and production should be based on the design requirements of the PCB.

3. Produce photoresist film. Photoetching film is a key tool for making PCBs, which converts circuit design drawings into physical objects for subsequent lithography steps.

3、 Process

1. Lithography. Lithography is the most important step in the manufacturing process, which transfers the designed circuit graphics onto the copper foil of the PCB.

2. Etching. The etching process removes unnecessary copper foil and forms a circuit board.

Drill holes. Drilling holes is to allow circuits to connect between layers.