Faced with the various PCB circuit boards on the market, there are two ways to distinguish the quality of PCB circuit boards; the first method is to judge from the appearance, on the other hand, to judge from the quality specification requirements of the PCB board itself.

　　How to judge the quality of PCB circuit board

　　 distinguish the quality of the circuit board from the appearance

　　 Under normal circumstances, the appearance of the PCB circuit board can be analyzed and judged through three aspects:

　　Standard rules for size and thickness: The thickness of the circuit board is different from that of the standard circuit board, and customers can measure and check the thickness and specifications of their own products.

　　Light and color: 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, less ink, the insulation board itself is not good.

　　 Welding seam appearance: circuit boards have many parts. If the soldering is not good, the parts are easy to fall off the circuit board, which will seriously affect the welding quality of the circuit board. It is very important to have a good appearance, careful identification and a stronger interface.

　　*** PCB circuit boards need to meet the following requirements

　　 The phone is required to be easy to use after the components are installed, that is, the electrical connection must meet the requirements

　　 The line width, line thickness, and line distance of the line meet the requirements to prevent the line from heating, breaking, and short-circuiting.

　　The copper skin is not easy to fall off under high temperature.

　　The copper surface is not easy to oxidize, which affects the installation speed, and it will be broken shortly after being oxidized.

　　 There is no additional electromagnetic radiation.

　　 The shape is not deformed, so as to avoid deformation of the housing after installation and dislocation of the screw holes. Now it is all mechanized installation, and the deviation of the hole position of the circuit board and the deformation of the circuit and the design should be within the allowable range.

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

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

　　 The above is the way to judge the quality of PCB circuit boards. When buying PCB circuit boards, keep your eyes open.