◆Overview  In addition to micro-ultraviolet (UV) LEDs with a peak wavelength of 385nm, we have successfully developed three types of visible micro-LEDs with a peak wavelength of 620nm for red, 510nm for green, and 450nm for blue. In 2018 we have succeeded in high-efficiency light emission of micro UV-LEDs with a size of 12 μm x 24 μm and its peak wavelength of 385nm (patented), and have already supplied samples to many users. We have also developed visible LEDs, because many users request micro-sized chips for red, blue, and green LEDs. This time, especi...