UV LED has been favored for its long life, cold light, no radiation, high energy, low energy consumption and high efficiency. At the same time, the production technology is high, the competition threshold is high, and it is easy to differentiate, which also makes UV LED become a favorable market for LED manufacturers to compete for the layout. According to Yole, an internationally known forecasting company, the business of UV leds is expected to grow to at least $520 million by 2019, with a compound annual growth rate of up to 44.3 percent.
Crystal energy photoelectricity has long been the focus of UV LED. In the first half of 2015, crystal optoelectronics launched UVA LED products with high luminous efficiency of 380-410nm. According to tang wenjun, marketing director of UV LED, silicon substrate UVA LED products have been in the forefront of the industry curing field.
UVA LED products are mainly used in food packaging, ink curing, adhesive curing, medical curing and other emerging industrial photo-curing markets. In terms of technology, UVA LED applied in industrial curing should meet two major requirements: on the one hand, high curing demand is high in energy, and large current is needed to drive overdrive. On the other hand, due to the short wavelength of UV LED, its light penetration is relatively weak, but to achieve good curing effect, UVA LED beam must penetrate into the inner layer of curing glue, which requires the beam to be concentrated and directional.
"" silicon substrate UVA LED just fits the two requirements of industrial curing very well." " "The silicon substrate UVA LED adopts the silicon substrate LED epitaxy technology with independent intellectual property rights, and the chip is a vertical electrode structure, which is conducive to overdrive, better heat dissipation performance, and because only one surface glows, its beam is concentrated, good directivity and easy to secondary optics," tang said. At the same time, to make the sapphire substrate LED chip vertical structure on the market, the laser stripping technology must be adopted, which has the risk of damaging the chip itself, and the product reliability has hidden trouble. The silicon substrate's natural material properties enable the LED to easily obtain the vertical electrode structure, which is more reliable than the laser peeling.
The beam points uniformly, has good directivity, and has good heat dissipation performance. What is needed for UV LED is what silicon substrate technology is good at. Silicon substrate + UV LED is a perfect match.