How to identify the advantages and disadvantages of PCB circuit boards?

In the face of all kinds of PCB circuit boards on the market, I will teach you that when distinguishing good or bad PCB circuit boards, we can start from two aspects; the first method is to judge from the appearance.

How can we judge from the appearance? We must start with three aspects: first, the standard of size and thickness. The thickness of the circuit board is different from the standard circuit board. Specification. The second is the light and color of the board. The external circuit board is covered with ink, and the circuit board can play the role of insulation. If the color of the board is not bright and there is less ink, the insulation board itself is not good: third, soldering Seam appearance, because the circuit board has many parts, if the welding is not good, the parts are easy to fall off the circuit board, which will seriously affect the welding quality of the PCB circuit boards. It is very important to have a good appearance, carefully identify it, and have a stronger interface.

We judge from the quality specification requirements of the PCB circuit boards itself:

1. It is required that the telephone should be easy to use after the components are installed, that is, the electrical connection must meet the requirements;

2. The line width, line thickness, and line spacing of the line meet the requirements, so as 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 oxidation;

5. No additional electromagnetic radiation;

6. The shape is not deformed, so as to avoid the deformation of the shell and the misalignment of the screw holes after installation. Now it is all mechanized installation, the hole position of the circuit board and the deformation error between the circuit and the design should be within the allowable range;

7. High temperature, high humidity and resistance to special environments should also be considered;

8. The mechanical properties of the surface must meet the installation requirements;