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Advantages of multi-layer PCB circuit boards

source:Industry News release time:2022-06-28 Article author:yu Popular:pcb

  Advantages of multi-layer PCB circuit boards(图1)

  Multilayer PCB boards are strongly recommended for rapid PCB design. First of all, the inner layer of the multi-layer PCB circuit board is specially allocated to the switching power supply and ground, so it has the following advantages:

  1. The switching power supply is very stable;

  2. The characteristic impedance of the power circuit is greatly reduced;

  3. The total length of wiring is greatly reduced.

  In addition, from the perspective of cost, when comparing the cost of the same area, although the cost of a multi-layer PCB is higher than that of a single-sided PCB, once the miniaturization of the PCB, the convenience of reducing noise and other factors are taken into consideration. At the time, the cost difference between multi-layer PCB circuit boards and single-sided PCB circuit boards is not as high as estimated. When purely calculating the area cost of the PCB circuit board based on the statistical data that everyone knows, the area of the two-layer PCB circuit board is about 462 square millimeters per yuan, and the 4-layer PCB circuit board is 27 square millimeters. In other words, the design For the same power supply circuit, once the area of the 4-layer PCB can be reduced to 1/2 of the two-layer PCB, the cost will be the same as that of the two-layer PCB. Although batching multiple layers will endanger the area cost of the PCB circuit board, there is still no 4 times the price difference. Once the price difference is more than 4 times, if you can find ways to reduce the use area of the PCB circuit board, and find ways to reduce It should be within 1/4 of the two-layer board.


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