PCB layer description

What are the layers of a PCB? What are they made of?


Signal Layer:
This layer contains the copper traces
2. Power Plane Layer: This layer provides a dedicated plane for distributing power throughout the circuit. It consists of large areas of copper that act as power supply paths.
3. Ground Plane Layer: Similar to the power plane layer, the ground plane layer provides a dedicated plane for establishing a solid ground reference.
4. Solder Mask Layer: The solder mask layer is applied over the copper layers to protect them from oxidation, contamination, and accidental short circuits