How to distinguish the quality of FPC flexible circuit board

Methods to judge the quality of FPC circuit board:



First, distinguish the quality of the circuit board from its appearance



Generally, the appearance of FPC circuit board can be analyzed and judged from three aspects;



1. Standard rules for size and thickness.



The thickness of circuit board is different from that of standard circuit board. Customers can measure and check according to the thickness and specification of their products.



2. Light and color.



The external circuit boards are covered with ink, and the circuit boards can play an insulating role. 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 easy to fall off the circuit board, which seriously affects the welding quality of the circuit board. It is important to have a good appearance, identify carefully, and have a strong interface.



Second: high-quality FPC circuit boards need to meet the following requirements



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



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



3. The copper sheet is not easy to fall off under high temperature;



4. The copper surface is not easy to oxidize, which affects the installation speed. It will be damaged soon after oxidation;



5. No additional electromagnetic radiation;



6. The appearance is not deformed, so as to avoid shell deformation and screw hole dislocation after installation. Now it is 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 special resistance should also be considered;



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



The above is the way to judge the quality of FPC circuit board. When purchasing FPC circuit board, be sure to shine your eyes.