Crystal Energy has long used UV LED as a key area of ​​development. In the first half of 2015, Jingneng Optoelectronics launched a 365-430nm high-efficiency silicon substrate UVA LED product. According to Tang Wenjun, director of UVLED marketing, silicon-based UVA LED products are currently in the forefront of the industrial curing field. UV LED has always been favored for its long life, cold light source, no radiation, high energy, low energy consumption and high efficiency. At the same time, the high production technology content, high competition threshold and easy to differentiate, also make UV LED become a favorable market for LED manufacturers to compete. According to internationally renowned forecasting company Yole, the UV LED business is expected to grow to at least 520 million US dollars by 2019, with a compound annual growth rate of 44.3%. Crystal Energy has long used UV LED as a key area of ​​development. In the first half of 2015, Jingneng Optoelectronics launched a 365-430nm high-efficiency silicon substrate UVA LED product. According to Tang Wenjun, director of UVLED marketing, silicon-based UVA LED products are currently in the forefront of the industrial curing field. UVA LED products are used in food packaging, ink curing, rubber curing, medical curing and other emerging industrial light curing markets. Technically, UVA LEDs used in industrial curing meet two major requirements: on the one hand, high energy requirements for curing require large currents to drive overdrive. For example, general lighting typically requires only 350 mA of drive current, while UVA LEDs require 700- when operating. 1000mA, which puts higher requirements on the current spreading and heat dissipation of the UVLED chip; on the other hand, because the UV LED has a shorter wavelength, its light penetration ability is relatively weak, but to obtain a good curing effect, the UVA LED beam It must penetrate into the inner layer of the cured adhesive, which requires the beam to concentrate and have good directivity. Silicon substrate UVA LEDs are well suited to meet the two requirements of industrial curing. Tang Wenjun said that the silicon substrate UVA LED adopts silicon substrate LED epitaxial technology with independent intellectual property rights. The chip is a vertical electrode structure. This structure is good for overdrive, and has better heat dissipation performance. At the same time, since only one surface emits light, its beam is concentrated. , good directionality, easy secondary optics. At the same time, the sapphire substrate LED chip on the market has to be made into a vertical structure, and laser stripping technology must be used, which has the risk of injuring the chip itself, and the reliability of the product has hidden dangers; and the natural material properties of the silicon substrate enable the LED to The vertical electrode structure is easily obtained, which is more reliable than laser stripping. The beam is evenly concentrated, the directionality is good, and the heat dissipation performance is excellent. What the UV LED needs is what the silicon substrate technology is good at, and the silicon substrate + UV LED can be said to be a natural pair.
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