How to judge single-sided double-panel multi-layer board
But to use the two sides of the wire, must be between the two sides have the appropriate circuit connection Caixing. The "bridge" between such circuits is called via. The guide hole is a small hole filled with metal on the PCB, which can be connected to both sides of the wire. Because double-sided panels are twice as large as single-sided panels, and because cabling can be staggered (can be routed to the other side), it is more suitable for use on more complex than single-panel circuits.
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Because there are many strict restrictions on the design of the single-sided board (because there is only one side, the wiring can not cross and must be around the path), so only the early circuit to use such a board single-panel wiring diagram to network printing Screen Printing), that is, on the copper surface printed on the resistance agent, after etching and then to the resistance to print on the mark, and finally to punch processing to complete the parts of the hole and shape.
The single panel is on the most basic PCB, the parts are concentrated in one side, the wires are concentrated on the other side. Because the wires only appear on one side, we call this kind of PCB called single-sided.
