Aluminum substrate is a good heat dissipation function of the metal-based CCL, the general single-sided structure composed of three layers, namely the circuit layer (copper foil), insulation and metal substrate. For high-end use is also designed for the double-sided board, the structure of the circuit layer, insulation layer, aluminum, insulating layer, circuit layer. A very small number of applications for the multilayer, can be an ordinary multilayer and insulating layer, aluminum fit together. LED aluminum substrate is the PCB, but also the meaning of printed circuit board, but the circuit board material is aluminum alloy, the general material of our previous circuit board is fiberglass, but because the LED heat larger, so LED lamps with the circuit board is generally Aluminum plate, to heat quickly, other types of equipment or electrical circuit board or fiberglass board!