High-quality PCB circuit boards need to meet the following requirements:
1. It is required that the phone zhi machine be easy to use after the components are installed, that is, the electrical connection must meet the dao requirements;
2. The line width, line thickness, and line distance of the line meet the requirements to avoid line heating, open circuit, and short circuit;
3. The copper skin is not easy to fall off under high temperature;
4. The copper surface is not easy to oxidize, which affects the installation speed, and it will be broken soon after being oxidized;
5. There is no additional electromagnetic radiation;
6. The shape is not deformed, so as to avoid deformation of the shell and dislocation of the screw holes after installation. Now it is all mechanized installation, the hole position of the circuit board and the deformation error of the circuit and the design should be within the allowable range;
7. High temperature, high humidity and special environment resistance should also be considered;
8. The mechanical properties of the surface must meet the installation requirements.