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 performance and mechanical processing performance. In the production process of circuit board manufacturers, it can be clearly known 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 widely used and used in high-tech products. The thermal expansion, dimensional stability, heat dissipation and other properties of the aluminum substrate make it meet more high-demand products.
Next, let's introduce the related performance of LED aluminum substrate. Thermal conductivity LED aluminum substrate
1. Dimensional stability: Aluminum substrates are obviously much more stable in size than printed boards made of insulating materials. Aluminum-based printed boards and aluminum sandwich panels are heated from 30°C to 140-150°C, and the dimensional change is 2.5-3.0%.
2. Thermal expansion: Expansion with heat and contraction with cold are the common nature of substances. Different substances have different coefficients of thermal expansion. For example: LED aluminum substrate can effectively solve the problem of heat dissipation, so that the thermal expansion and contraction of different materials on the printed circuit board can be alleviated, and the durability and reliability of the whole machine and electronic equipment can be improved. 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 multi-layer 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 conductors of heat, and the interlayer insulation prevents heat from being emitted. 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 the aluminum substrate, the heat dissipation of the copper substrate is also particularly good, but the price is very expensive.
4. Other reasons: LED aluminum substrate has shielding effect; replaces brittle ceramic substrate; rest assured to use surface mount technology; reduces the real effective area of printed PCB circuit board; replaces components such as radiators, improves product heat resistance and physical performance; reduced production costs and labor.
