Double sided printed circuit board is a common electronic component carrier with the following structure and characteristics:

Structure: A double-sided printed circuit board consists of two layers of substrates, both covered with copper foil. One side is used to connect electronic components, while the other side is used to connect circuits or serve as a ground layer. Between two layers of substrates, there is usually an insulation layer or substrate material used to isolate the two layers of copper foil and avoid short circuits.

Connection method: The circuit on the double-sided printed circuit board is electrically connected by connecting two layers of copper foil through perforations. These perforations can be connected by chemical copper plating or electroplating copper to form an electrified connection.

Flexibility: Double sided printed circuit boards are more flexible than single-sided printed circuit boards because they can layout circuit components on both sides and connect two layers of circuits through perforations, allowing for higher component density and more complex circuit functionality.

Wide applicability: Due to its high flexibility and applicability, double-sided printed circuit boards are widely used in various electronic devices, such as computers, communication equipment, industrial control equipment, consumer electronics products, etc.

High fault tolerance: Due to the fact that double-sided printed circuit boards can layout circuit components on two sides, it can better distribute circuit components, thereby improving the fault tolerance and stability of the circuit.

Overall, double-sided printed circuit boards are widely used in the electronics industry due to their simple structure, high flexibility, wide applicability, and high fault tolerance.