What is the difference between aluminum substrate PCB and FR-4PCB?

Aluminum PCB is a metal-based copper clad board with good heat dissipation function, and the general single panel is composed of three layers of structure, which are circuit layer (copper foil), insulation layer and metal base layer. Aluminum substrate is a type of PCB board, and the design is designed in accordance with the requirements of the PCB board. Generally speaking, the aluminum substrate is a single-sided aluminum PCB board, which has good thermal conductivity and is generally used in the LED industry. At present, the most commonly used LED aluminum substrate has two sides, the white side is welded to the LED pin, the other side shows the natural color of aluminum, generally coated with thermal conductive coagulation and then contact with the thermal conductive part. The most PCB boards are generally copper substrates. According to the number of layers, it can be divided into single, double-layer and multi-layer boards. Compared with aluminum substrates, one material is copper and the other is aluminum plate. Aluminum substrate because of its special PP material, heat dissipation effect is better than PCB board, the price is relatively expensive.


Advantages and applications of aluminum PCB:
1. Environmental protection: Aluminum is non-toxic and recyclable. Due to its ease of assembly, using aluminum for manufacturing also helps to save energy. For printed circuit board suppliers, using this metal helps maintain the health of the planet.
Lightweight: Aluminum has incredible durability and is an amazing lightweight metal. Aluminum adds strength and elasticity without adding any additional weight.
3. Higher durability: Aluminum provides strength and durability for products that cannot be provided with ceramic or glass fiber substrates. Aluminum is a solid foundation material that can reduce accidental damage during manufacturing, handling, and daily use.
4. Heat dissipation: High temperatures can cause serious damage to electronic equipment, so it is advisable to use materials that help dissipate heat. Aluminum can actually transfer heat from important components, minimizing its harmful effects on circuit boards.

Aluminum PCB can be applied to audio equipment, power supply, communication electronic equipment, automated office equipment, automobiles, computers, lighting fixtures, and other products.


FR-4 material, short for glass fiber cloth, is a code for the grade of fire-resistant material used as a raw material and substrate for circuit boards. It represents a material specification in which resin materials must be able to extinguish themselves after combustion. Most commonly used in PCBs (printed circuit boards), most single, double sided, and multi-layer PCB boards are made of this material. Due to its high strength and flame retardance, most circuit boards choose FR-4 as the substrate.


The advantages of FR-4 PCB are electrical insulation, stability, good flatness, smooth surface, no pits, and thickness tolerance standards. It is suitable for applications in high-performance electronic insulation products. It is now widely used in electronic manufacturing industries such as computers, communications, automobiles, instruments, and military industries. Choosing aluminum PCB or FR-4 PCB determines the use.

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