Aluminum substrates are metal-based copper-clad plates with excellent heat dissipation capabilities, commonly used in LED lighting products. They have a three-layer structure and are suitable for high-power electronic devices due to their good thermal conductivity. On the other hand, PCB boards provide electrical connections for electronic components and are suitable for small, lightweight, and high-reliability electronic products. Aluminum substrates have a simpler production process and are suitable for high-power heating devices and automotive electronics, while PCB boards require complex processes and are suitable for computer peripherals and consumer electronics. Aluminum substrates outperform PCB boards in terms of heat dissipation but are relatively expensive. In conclusion, both aluminum substrates and PCB boards have their unique advantages and play important roles in circuit boards.