Insulation layer in Al PCB

Compared with the traditional FR4 PCB, if both of them are using the same thickness and same line width, aluminum PCB can carry higher current. The function of insulation layer on aluminum pcb is adhesive, insulation and thermal conductivity, which is the core technology on metal core pcb.

Single side Aluminum PCB structure is mainly divided into three layers: circuit layer, insulating layer and metal layer. Circuit layer is etched form copper sheet and stick to prepreg, which is used for assembly and connection. Also for high tech purpose, there is 2Layer Aluminum PCB, the circuit structure is a circuit layer, an insulating layer, an aluminum layer, an insulating layer, a circuit layer. Very few applications use multilayer aluminum PCB, made of conventional FR4 PCB, aluminum base and insulation layer which stick both fr4 and aluminum material.

Insulation layer is the thermal conduction structure in Aluminum PCB. The better thermal conductivity of the insulation layer, the more it can help to spread the heat produced during the operation, so it will be better to reduce the operating temperature of the devices, so as to improve the power load of module, reduce the volume, prolong the service life, and improve the power output etc.