customize mcpcb for Industrial LED light

Why is aluminum used in circuit boards?

Aluminum base board consists of three layers: copper foil, insulating layer and metal aluminum. Since there is an insulating layer, can the metal layer be made of other materials besides aluminum? Such as copper plate, stainless steel, iron plate, silicon steel plate, etc. What kind of material the metal base printed board uses, in addition to the heat dissipation performance, also considers the thermal expansion coefficient, thermal conductivity, strength, hardness, weight, surface condition and cost of the metal base printed board.
Under normal circumstances, considering conditions such as cheap pcb manufacturing and technical performance, aluminum plate is an ideal choice.
Commonly used in lighting products such as Aluminum 2.0W LED board, there are two sides, the white side is for soldering the LED pins, and the other side is the color of aluminum. Generally, the thermal conductive paste will be applied to contact with the thermal conductive part. Mainly used in lamps such as Aluminum 3.0W LED board and industrial control PCB, etc. The main advantage is that the Aluminum LED board conducts heat quickly and has good heat dissipation performance.
In addition to good heat dissipation performance, Aluminum base board also has the following advantages:
Comply with RoHS environmental protection requirements
More suitable for Surface-Mount (SMT) &BGA Assembly
Higher current carrying capacity
Extremely effective treatment of thermal diffusion in the circuit design plan, thereby reducing the operating temperature of the module on the PCB, extending the service life, and improving the power density and reliability;
Reduce the assembly of heat sinks and other hardware (including thermal interface materials), reduce product volume, and reduce hardware and assembly costs; optimize the combination of power circuits and control circuits;
Replace the fragile Ceramic PCB to obtain better mechanical durability.