Single Sided Printed Circuit Board (PCB) is a basic electronic component carrier. It consists of a copper foil layer, an insulation layer, and a substrate. The copper foil layer is the working layer of the PCB, on which circuit patterns are formed through chemical etching. The insulation layer mainly serves the functions of isolation, protection, and support. The substrate is the basic material of the entire PCB.

In single-sided PCB, the copper foil layer is located on one side of the substrate, usually at the bottom of the substrate. Circuit patterns are printed on copper foil layers for connecting various electronic components such as resistors, capacitors, integrated circuits, etc. By connecting these components, a single-sided PCB can achieve the functionality of the circuit. Meanwhile, the insulation layer is located on the other side of the copper foil layer, which can effectively isolate the circuit, prevent short circuits, and protect the circuit from external environmental influences.

Single sided PCB is widely used in various electronic devices, such as household appliances, communication equipment, digital products, etc. It has a simple structure, low manufacturing cost, and is suitable for some simple electronic circuits. In design, compact layout and design are usually adopted to save space and improve performance. However, due to the presence of only one layer of copper foil, the complexity and functionality of the circuit are limited. Therefore, in some complex electronic devices, it may be necessary to use more complex double-sided or multi-layer PCBs.

Overall, the basic structure of single-sided PCB is simple and clear, suitable for some simple electronic circuit designs. It plays an important role in electronic devices and is an indispensable part of the electronics industry.