How to distinguish the advantages and disadvantages of PCB circuit boards? Many friends may not be able to make a direct judgment. Today, let's take you on how to make an intuitive judgment.
The market price of PCB circuit boards has always been fiercely competitive, and due to this factor, the cost of PCB board materials has also shown a continuous upward trend. More and more manufacturers are trying to monopolize the market with low prices in order to enhance their core competitiveness. However, behind these ultra-low prices is the reduction of material and manufacturing costs to obtain them. However, devices are often prone to cracks, scratches, and abrasions, and their precision, performance, and other comprehensive factors have not met the standards, seriously affecting the solderability and reliability of products used.
When faced with a wide variety of PCB circuit boards on the market, the Macrolink Circuit editor teaches us that when identifying the quality of PCB circuit boards, we can start from two aspects; The first method is to judge based on appearance.
Some friends may wonder how to judge from the appearance. We need to start from three aspects: first, the standards for size and thickness. The thickness of the circuit board is different from that of the standard circuit board. Customers can measure and inspect according to the thickness and specifications of their own products. Secondly, it is the light and color of the board. The external circuit board is covered with ink, which can provide insulation. If the color of the board is not bright and there is less ink, the insulation board itself is not good. Thirdly, the appearance of the weld seam. Due to the large number of parts in the circuit board, if the welding is not done well, the parts are prone to fall off, which seriously affects the welding quality of the circuit board. Good appearance, careful identification, and strong interface are very important.
Of course, the above is only a basic judgment. On the other hand, we have judged based on the quality specifications of the PCB circuit board itself:
1. Require that the telephone be easy to use after the components are installed, that is, the electrical connections must meet the requirements;
2. The line width, thickness, and spacing of the line meet the requirements to avoid heating, breaking, and short circuiting of the line;
3. Copper skin is not easily peeled off under high temperature;
4. Copper surface is not easy to oxidize, which affects installation speed, and it will break shortly after oxidation;
5. No additional electromagnetic radiation;
6. The appearance is not deformed to avoid deformation of the shell and misalignment of screw holes after installation. Nowadays, 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 resistance to special environments should also be taken into consideration;
8. The mechanical properties of the surface should meet the installation requirements;