Single panel features

　　The single panel is on the most basic PCB, the parts 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 Single-sided. Because a single panel has many strict restrictions on the design circuit (because there is only one side, the wiring can not cross and must go around a separate path), only early circuits used such boards;

　　The wiring diagram of the single panel is mainly Screen Printing, that is, the resistance is printed on the copper surface, and then the welding resistance is etched to prevent the mark, and finally the pilot hole and the shape of the part are completed by punching. In addition, some of the products produced in small quantities and in a variety of ways, the photographic method of pattern formation with photoresist is used.