FOLYSKY（WuHan） LTD.
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027-88111056
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13387504731
FOLYSKY（WuHan） LTD.
UVLED is a kind of LED, is a single wavelength of invisible light, generally below 400nm. Compared with the traditional light source, it has the advantages of long life, low energy consumption, high energy stable output, cold light source without thermal radiation, no toxic substances, safety and environmental protection. Widely used in biomedicine, anti-counterfeiting identification, purification (water, air, etc.) fields, ceramic metallized substrate computer data storage and military and other aspects. And with the development of technology, new applications will continue to appear to replace the original technology and products, UV LED has a broad market application prospects, such as UV LED light therapy device is a very popular medical device in the future, and now very hot urban pipeline light curing repair applications. However, because of its unique thermal characteristics, UVLED is a big defect in heat dissipation.
UVLED thermal characteristics: small current, LED temperature rise is not obvious. If the ambient temperature is high, the main wavelength of the UVLED will be redshifted, the brightness will decrease, and the luminous uniformity and consistency will become worse. In particular, the temperature rise of dot matrix and large display screen has a more significant impact on the reliability and stability of LED. So the heat dissipation design is also more critical.
And UVLED working for a long time will cause light decay resulting in aging, especially for high-power UVLED, the light failure problem is more serious. When measuring the life of the UVLED, only the damage of the lamp as the end of the life of the UVLED is far from enough, and the life of the LED should be specified by the percentage of light attenuation of the UVLED, such as 35%, which is more meaningful. So how to solve the problem of heat dissipation? Sliton ceramic circuit board can be!
Ceramic substrate has good thermal and electrical properties, the traditional aluminum based circuit board thermal conductivity is 1 ~ 2W/mk, copper itself thermal conductivity is 383.8W/m.K. However, the thermal conductivity of the traditional insulation layer is only about 1.0W/m.K., and the better one can reach 1.8W/m.K. The thermal conductivity of alumina ceramics: 15 ~ 35W/m.k, the thermal conductivity of aluminum nitride ceramics: 170 ~ 230W/m.k, the thermal conductivity of copper substrate is 2W/(m*K); The aluminum/copper based circuit board itself has a high thermic conductivity, but there is an insulating layer on the aluminum/copper based circuit board, resulting in a decrease in the thermal conductivity of the entire board. If we use aluminum nitride ceramic base as the fracture layer and aluminum/copper as the substrate, the thermal conductivity is more than 100 times higher than that of the traditional fracture layer. Therefore, the problem of high power UVLED heat dissipation is solved.
As for the light output, the chip inversion technology is used, and the reflection surface on the bottom and side is added to reflect the wasted light energy, so that more effective light output can be obtained. I believe that solving the "fever" problem of UVLED will make it continue to shine in the light curing or medical, beauty and other industries, so that its value can be maximized! And Silitong behind the support of all customers, to solve their worries, dedicated to provide the best service!
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