Seoul Biosys Begins Production of Rare Earth-Free White Micro LEDs | Aju Press

Seoul Biosys has begun mass production of rare earth-free white micro LEDs, using its packaging-free WICOP technology to generate white light in chips smaller than 100µm without rare earth phosphors like yttrium aluminum garnet (YAG). The first product, a 25µm x 10µm micro LED, delivers 0.015 lumens in the white region of CIE coordinates with roughly 100 lm/W efficiency, targeting 200 lm/W within two years. The company says eliminating rare earths and packaging materials such as silicone resin, plastic, and lead frames could cut production costs by half. The move matters because Omdia projects the micro LED display market to grow from $10.54 million this year to about $6.8 billion by 2032, driven by smart glasses and ultra-small displays. Seoul Biosys and Seoul Semiconductor plan to prioritize supplying third-generation WICOP products to existing major clients starting in Q4 while expanding into AR displays and AI optical data transmission using ~10µm micro LEDs. Founder Lee Jeong-hoon said the company aims to leverage the rare earth-free white light technology to enter new optical semiconductor markets.