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Where is the LED chip using a ceramic substrate relative to the aluminum substrate?

Word:[Big][Middle][Small] QR Code 2019-9-18     Viewed:    
  Many sapphire wafers were mostly fixed with aluminum substrates, but with the development of high power density of 1W/3W/5W/10W/15W/20W/30W, the thermal conductivity, insulation and temperature resistance of aluminum substrates are difficult to satisfy. Product design requirements, ceramic substrate small series introduced, because many customers of LED chips use ceramic substrates instead of aluminum substrates. So where is the LED chip using a ceramic substrate relative to the aluminum substrate?

Ceramic substrate


  The thermal conductivity of the ceramic substrate is stronger than that of the aluminum substrate

  1, the thermal conductivity of the ceramic substrate is 35W-50W, which is ten times that of the general aluminum substrate. Excellent thermal conductivity makes the chip package very compact, which greatly increases the power density and improves the reliability of the system and equipment.

  2, the current carrying capacity is large, 100A current continuously passes through 1mm wide and 0.3mm thick copper body, the temperature rise is about 17°C; 100A current continuously passes through 2mm wide and 0.3mm thick copper body, the temperature rise is only about 5°C;

  3, low thermal resistance, thermal resistance of 10 × 10mm ceramic substrate 0.63mm thickness ceramic substrate thermal resistance is 0.31K / W, 0.38mm thickness ceramic substrate thermal resistance is 0.19K / W, 0.25mm thickness ceramic substrate The thermal resistance is 0.14K/W.

  4, high insulation withstand voltage, to ensure personal safety and equipment protection.

  5. Ability to complete new packaging and assembly methods to make the product highly integrated and compact.

  The aluminum substrate used for LEDs has a thermal conductivity of 1.0-2.5, and the thermal conductivity of the ceramic substrate can reach 30-50. The use of ceramic substrates in the LED industry can greatly improve the thermal conductivity, outstanding insulation and electrical functions, and LED lighting is more stable and it is not easy to affect the service life due to excessive temperature.

  The above is a discussion about the issue of "LED chips using ceramic substrates relative to aluminum substrates" described in the small series of ceramic substrates. If there are any unclear problems, you can contact us directly.
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