Firstly, distinguish the quality of a circuit board from its appearance

In general, the appearance of FPC circuit boards can be analyzed and judged from three aspects;

1. Standard rules for size and thickness.

The thickness of a circuit board differs from that of a standard circuit board, and customers can measure and inspect it based on their own product thickness and specifications.

2. Light and color.

The external circuit boards are covered with ink, and the circuit board can serve as insulation. If the color of the board is not bright and there is less ink, the insulation board itself is not good.

3. Weld appearance.

Due to the large number of parts on the circuit board, if the welding is not good, the parts are prone to fall off, which seriously affects the welding quality of the circuit board. It is important to carefully identify the appearance of the circuit board and have a strong interface.

Distinguish the quality of fpc

Secondly, high-quality FPC circuit boards need to meet the following requirements

1. After installing the components, the telephone should be easy to use, that is, the electrical connection should meet the requirements;

2. The line width, thickness, and distance of the line meet the requirements to avoid heating, open circuit, and short circuit of the line;

3. The copper skin is not easily peeled off under high temperature;

4. The surface of copper is not easy to oxidize, which affects the installation speed. After oxidation, it will break down soon after use;

5. No additional electromagnetic radiation;

6. The appearance is not deformed to prevent deformation of the casing and misalignment of screw holes after installation. Now it is all mechanized installation, and 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 special resistance should also be considered;

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