It is well known that PCB is an indispensable part of electronic products, composed of multiple layers, each with its specific function. Today we will explore the different functions of each layer.

1. Signal Layer

The signal layer is one of the most important layers on a PCB, used for transmitting electronic signals. Signal layers are typically made of copper foil, which is etched to form circuit patterns. The number of signal layers depends on the complexity of the PCB; generally, a simple PCB may have only one signal layer, while a complex PCB may have multiple signal layers.

2. Power Layer

The power layer is used to provide power to the electronic components on the PCB. Power layers are typically made of copper foil, which is etched to form power circuit patterns. The number of power layers depends on the complexity of the PCB; generally, a simple PCB may have only one power layer, while a complex PCB may have multiple power layers.

3. Ground Layer

The ground layer is used to provide grounding connections for electronic components. Ground layers are typically made of copper foil, which is etched to form grounding circuit patterns. The number of ground layers depends on the complexity of the PCB; generally, a simple PCB may have only one ground layer, while a complex PCB may have multiple ground layers.

In the next article, we will introduce the functions of the other layers.