PCB News - Application range of led aluminum substrate

Application range of led aluminum substrate

LED aluminum substrate is a special metal-based copper clad laminate, which is widely used because of its good thermal conductivity, heat dissipation, electrical insulation properties and mechanical processing properties. In the production process of circuit board manufacturers, it is clear that the aluminum substrate can be divided into three layers, namely the circuit layer (copper foil), the insulating layer and the metal base layer. LED aluminum substrates are widely used in LEDs, flashlights, street lamps, miner's lamps, high power, etc. Why can aluminum substrates be so widely used and used in high-tech products. The thermal expansion, dimensional stability, and heat dissipation properties of the aluminum substrate make it meet more demanding products.

Next, we will introduce the relevant performance of the LED aluminum substrate.

Thermal conductivity LED aluminum substrate

1. Dimensional stability: aluminum substrate, obviously the size is much more stable than that of printed boards made of insulating materials. Aluminum-based printed boards and aluminum sandwich panels are heated from 30°C to 140~150°C, with a size change of 2.5~3.0%.

2. Thermal expansion: Thermal expansion and contraction are the common nature of materials, and the thermal expansion coefficients of different materials are different. For example, the LED aluminum substrate can effectively solve the heat dissipation problem, thereby alleviating the thermal expansion and contraction of different substances on the printed circuit board, and improving the durability and reliability of the whole machine and electronic equipment. Especially to solve the problem of thermal expansion and contraction of SMT (Surface Mount Technology).

3. Heat dissipation: At present, many double-sided boards and PCB multilayer boards have high density and high power, and it is difficult to dissipate heat. Conventional printed circuit board substrates such as FR4 glass fiber board and CEM-3 are poor thermal conductors, and are insulated between layers, so heat cannot be dissipated. Local heating of electronic equipment cannot be ruled out, leading to high-temperature failure of electronic components, and aluminum substrates can solve this heat dissipation problem. In addition to aluminum substrates, copper substrates have excellent heat dissipation properties, but they are very expensive.

4. Other reasons: LED aluminum substrate has a shielding effect; replaces brittle ceramic substrates; rest assured to use surface mounting technology; reduces the real effective area of printed PCB circuit boards; replaces radiators and other components to improve product heat resistance and physical Performance; reduce production costs and labor.

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