LED aluminum substrate PCB
Published By Cynthia_PCB_assembly Hitech Circuits
- LocationShenzhen, 广东省 China
- StatusIn stock
- TypeNew
Why is the application range of LED aluminum substrate so wide?
LED aluminum substrate is a special metal-based copper-clad plate, which is widely used because of its good thermal conductivity, heat dissipation, electrical insulation 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 insulation layer and the metal base layer. LED aluminum substrates are widely used in LEDs, flashlights, street lights, mining lamps, high power, etc. Why can aluminum substrates be so widely used and used in high-tech products? The thermal expansion, dimensional stability, heat dissipation and other properties of aluminum substrates enable them to meet more high-demand products.
Let's introduce the relevant properties of led aluminum substrates.
1. Dimensional stability: Aluminum substrates are obviously much more stable in size than printed boards made of insulating materials. Aluminum-based printed circuit boards and aluminum sandwich panels, heated from 30℃ to 140~150℃, have a dimensional 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: LED aluminum substrates can effectively solve the heat dissipation problem, thereby alleviating the thermal expansion and contraction problems of different materials of components on printed circuit boards, and improving the durability and reliability of the entire machine and electronic equipment. In particular, it solves the thermal expansion and contraction problems 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 fiberglass boards and CEM-3 are poor conductors of heat, with interlayer insulation, and heat cannot be dissipated. Local heating of electronic equipment is not eliminated, resulting in high-temperature failure of electronic components, and aluminum substrates can solve this heat dissipation problem. In addition to aluminum substrates, copper substrates also have particularly good heat dissipation, but the price is very expensive.
4. Other reasons: LED aluminum substrate has a shielding effect; it replaces brittle ceramic substrates; it can safely use surface mounting technology; it reduces the truly effective area of printed PCB circuit boards; it replaces components such as radiators, improves product heat resistance and physical properties; and reduces production costs and labor.
Email us Cynthia<sales11@hitechpcb.com> if you are interested in PCB and PCBA service.
