source:Industry News release time:2022-10-21 Article author:yu Popular:pcb
1. Single-Sidedboards
On the most basic PCB, electronic components are concentrated on one side, and the wires are concentrated on the other side. Because the wire only appears on one side, we call this PCB called Single-Sided. Because the single -to -surface panel has many strict restrictions on the design route, the main is: the path that cannot be paid in the wiring and must be surrounded by the independent path, so only this type of board is used in the early circuit, and it is rarely seen now.
2. Double-Sidedboards)
There are wiring on both sides of this circuit board. However, to use the wires on both sides, there must be an appropriate circuit connection on both sides. The bridge between this circuit is called the guide hole. The guide hole is a small hole full or coated with metal on PCB, which can be connected to the wires on both sides. Because the area of the double panel is twice as big as a single -to -beard, and because the wiring can be intertwined with each other, it is more suitable for more complicated circuits than a single panel.
3. Multi-layerboards
In order to increase the area that can be wiring, multi -layer boards are used with more or double -sided wiring boards. Multi -layer panels use a few double panels, and put on a layer of insulating layer between each plate. The number of layers of the board represents several independent wiring layers. Usually the number of layers is even, and contains the two outermost layers. Most of the motherboards are 4 layers of structure, but because the layers of the PCB board are closely combined, it is generally not easy to see the actual number, but if you look closely at the motherboard, you may see, but this chance is not a big chance. Essence Therefore, the method we usually use to distinguish the number of PCB boards is to see its thickness and we can qi its weight.
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