Copper foil circuit layer
The copper foil circuit layer (generally using electrolytic copper foil) is etched to form a printed circuit, which is used to assemble and connect components. Compared with the traditional FR-4, with the same thickness and the same line width, the aluminum-based PCB can carry higher current.

Dielectric layer
Dielectric layer is the core technology of aluminum-based PCB, which mainly plays the role of bonding, insulation and heat conduction. The aluminum substrate insulation layer is the largest thermal barrier in the power module structure. The better the thermal conductivity of the insulation layer, the more beneficial it is for the diffusion of heat generated during the operation of the component, thereby reducing the operating temperature of the component, so as to increase the power load of the module, reduce the volume, extend the service life of the product, and increase the power output. purpose.

Metal base
The metal base layer is a supporting member of the aluminum substrate, which requires high thermal conductivity. Generally, it is an aluminum plate, or a copper plate can also be used (the copper plate can provide better thermal conductivity).

Aluminum base membrane
It is a reflective film made of soft aluminum foil as a base for protection

• White and opaque with good color-change resistance.
• Excellent mechanical processability, punching process applicable.
• PCB processing equivalent to FR-4
• Has good thermal conductivity, electrical insulation performance and mechanical processing performance

1.LED lighting: fluorescent tubes, high bay lights, street lights, bulb lights, kitchen and bathroom lights, flood lights, underwater lights, corn lights, hard lights, car headlights and tail lights
2. Security: array camera, high-speed dome, aircraft array camera, shield camera
3. Communication electronic equipment: high-frequency amplifiers, filter appliances, and transmission circuits.
4. Audio equipment: output amplifier, balance amplifier, audio amplifier, power amplifier, etc.
5. Power supply equipment: switching regulator, SW regulator, etc.
6. Communication electronic equipment: high-frequency amplifier `filtering appliance` sending circuit.
7. Medical: medical operation led lights, etc.
8. Automotive: automotive lights, igniters, power controllers, etc.
9. Computer: CPU board, power supply unit, etc.
10. Power module: inverter, solid state relay, etc.

Aluminum substrates are generally stored in a dark and dry environment, and are usually carried in anti-static bags or cotton pads during transportation. Most aluminum substrates are prone to moisture, yellowing and blackening, and are generally used within 48 hours after opening the vacuum packaging .