PCB Technical - The reason why PCBA factory does circuit board impedance

The reason why PCBA factory does circuit board impedance
The Internet era has broken the traditional marketing model, and a large number of resources have been gathered together to the greatest extent through the Internet, which has also accelerated the development speed of FPC flexible circuit boards, and then as the development speed accelerates, environmental problems will continue to appear in PCB factories. In front of him. However, with the development of the Internet, environmental protection and environmental informatization have also been developed by leaps and bounds. Environmental information data centers and green electronic procurement are gradually being applied to the actual production and operation fields.
PCB circuit board impedance refers to the parameters of resistance and reactance, which have a blocking effect on alternating current. In the production of PCB circuit boards, impedance processing is indispensable. Why does PCBA factory make impedance on circuit boards? The following editor will give us a brief introduction.

The bottom of the PCB circuit board should be connected to the electronic components of the device. After the connection, the conductive function and the signal transmission function should be solved, so the lower the impedance, the better, and the resistivity per square centimeter should be less than 0.000001. In the production process of PCB circuit boards, there are process manufacturing links such as copper sinking, electroplating tin, and connector soldering. The materials used in these links must ensure low resistivity, so that the overall impedance of the circuit board can meet the quality requirements of the product . And tin plating is the simplest place where problems occur in the entire PCB circuit board manufacturing process, and this link has a great impact on impedance. The electroless tin layer has a big defect-easy to oxidize or deliquesce, and poor solderability, which makes the PCB circuit board difficult to solder, and the impedance is too high, resulting in poor conductivity and instability of the overall board function.

There are various signal transmissions in the conductors in the PCB circuit board. When it is necessary to increase its frequency in order to increase its transmission rate, if the circuit itself is different due to etching, stack thickness, wire width and other factors, the impedance value will change. Distorting its signal, resulting in a decline in the function of the circuit board, so it is necessary to control the impedance value within a certain range. iPCB is happy to be your business partner. Our business goal is to become the most professional prototyping PCB manufacturer in the world. With more than ten years of experience in this field, we are committed to meeting the needs of customers from different industries in terms of quality, delivery, cost-effectiveness and any other demanding requirements. As one of the most experienced PCB manufacturers and SMT assemblers in China, we are proud to be your best business partner and good friend in all aspects of your PCB needs. We strive to make your research and development work easy and worry-free.
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