What is a 2 layer Aluminum PCB?

For PCB manufacturing, metals are often used for the PCB base. Aluminum is a good example of metals used in PCB manufacturing.  This material features great thermal and electrical properties. Therefore, it is an ideal option for PCB manufacturing. The 2 layers aluminum PCB is widely used in high thermal applications. In this article, our major focus is on the 2 layer aluminum PCB and what it offers.

What is a 2 layer Aluminum PCB?

Aluminum circuit board is a metal-based PCB that features great heat dissipation. Generally, aluminum is a well-known material for its great electrical and thermal features. The 1 layer aluminum board comprises three layers. These layers are dielectric layer, aluminum base layer, and dielectric layer. However, a 2 layers aluminum board is more complicated compared to the single layer aluminum pcb.

The aluminum PCB material features high thermal conductivity. Therefore, this is ideal for punching and drilling. The aluminum base board enhances thermal conductivity. Also, the thermal insulation dielectric layer offers good electrical insulation performance.  

This is different from the multilayer aluminum PCB or multilayer pcb and it comprises:

  • The circuit layer
  • Insulation layer
  • Aluminum base layer
  • Insulation layer
  • Circuit layer

Also, this metal core PCB features great heat dissipation. A 2 layer aluminum PCB comprises wiring on both same sides. However, it is important there is a wiring connection between these layers. Also, this PCB features two layers of copper conductor.

Manufacturers use traditional resin to fill the big holes in this CHEAP aluminum PCB. This helps to realize any interconnection between layers. But, there are some limitations to this. The traditional resin filling can result in cracks. Therefore, the yield is extremely low. Also, the thermal conductivity of the traditional resin is just 0.2W/m/k.

The function of the aluminum substrate is to allow heat transfer from thermal insulation to the circuit layer. The application of this aluminum PCB is also limited. Also, aluminum circuit board can’t achieve the performance of inter-layer connection due to their conductivity.

The universal aluminum PCB requires further step to laminate the aluminum and thermal conductive laminate.

Properties of 2 layer Aluminum PCB

The 2 layer aluminum circuit board features some properties that contribute to its performances. This also differentiates it from a single sided aluminum PCB.

Thermal dissipation

One of the properties of this aluminum PCB is thermal dissipation. Insulated metal substrate like CEM3 and FR4 are poor thermal conductors. When heat doesn’t dissipate properly, it can cause failure of electronic components. Aluminum is a material known for its high heat dissipation function.

High dimensional stability

The dimensional stability of a material explains how it expands when exposed to heat. Generally, aluminum maintains a high dimensional stability. Therefore, this aluminum PCB is ideal for high thermal applications.

Thermal expansion

Thermal contraction and expansion problems on PCBs with several substances can be reduced. Therefore, this improves the reliability and durability of electronic devices. Also, aluminum boards can solve thermal expansion problems in SMT.

Other performance

A 2 layer aluminum PCB features a shielding effect. Also, it can enhance heat resistance. Also, this circuit board features great electrical and thermal performances.

What are the Benefits of the 2 Layer Aluminum PCB?

Below are the main benefits of this Aluminum PCB

Low cost

First, Aluminum is regarded as a metal, which is present in different climates, therefore, mining and refining it is easy. Therefore the cost involved in doing this is very low in contrast to other metals. What this means is that the manufacturing of these products using these metals will also be less expensive.

Environmental Friendly

Also, Aluminum is recyclable and non –toxic. Therefore, the aluminum PCB manufacturing process is useful for the conservation of energy because assembling it is easy. Also, for suppliers of printed circuit boards, making use of this metal base plays a vital role in maintaining the planet’s health.

Heat Dissipation

When there is high dissipation, this can lead to serious damages to your electronics. Therefore, it is advisable to choose a material, which can dissipate heat. This is why aluminum is important, because it plays a huge role in transferring heat from any vital components. Therefore, this reduces its harmful effects on the printed circuit board. This is why this Aluminum PCB has great heat dissipation.

Greater Durability

One great feature of the 2 layers Aluminum circuit board is that it offers durability and strength to products, which fiberglass or ceramic bases cannot. The Aluminum material is a sturdy one, which helps in the reduction of accidental breakage when handling, manufacturing, as well as everyday use.

What are the Applications of a 2 Layer Aluminum PCB?

Below are the applications of a 2 Layer Aluminum circuit board

Audio Equipment: These audio equipment include output and input amplifiers, audio amplifiers, balanced amplifiers, power amplifiers, preamplifiers, etc.

 Communication Equipments: These include filter electrical circuits, high-frequency amplifiers, and more.

Equipment for power supply: These equipment include conditioner, stabilizer, DC-AC adapter etc.

Office automation equipment: You can apply aluminum PCBs in office automation equipment. These include motor drivers, etc.

Power modules: Aluminum PCBs can be seen in power modules like rectifier bridges, solid relays, inverters, etc.

Computers: The significance of the Aluminum PCBs is obvious. This is seen in floppy disk drives, power supply devices, etc.

Electronic Control: The 2 layer Aluminum PCB is seen in electronic controls like different components present in a circuit, transistor base and relays.

Industrial Vehicles: Furthermore, Aluminum PCBs are applicable in voltage regulators, systems for light conversion, automatic control system, and ignition.

Microwave, Switches: These include semiconductor devices, radiator, motor controller, and thermal insulation

LED Display: The double sided Aluminum PCB is applicable in LED display. This includes displays having a LED light source.

Industrial Vehicles: These include automatic control system for safety, voltage regulator, ignition, System for light conversion, etc.

Lighting: Because energy-saving lamps have been promoted lately, the market welcomes different energy-saving LEDs. Therefore the aluminum substrate for the LED lights features large-scale applications.


We hope you understand what a 2 layer Aluminum PCB is and where it is applicable. Note that it is different from the single layer aluminum PCBs. Reach out to us today at RayMing PCB if you need a reliable pcb manufacturer for your top-quality 2 Layer Aluminium PCB and you will be glad you did.

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