Swedish startup Polar Light Technologies has fabricated its first micro-display prototype using the company’s proprietary pyramidal MicroLED technology. The prototype combines Polar Light Technologies’ bottom-up-grown monochrome MicroLED front-plane with a CMOS back-plane from SAPIEN Semiconductors. Precision flip-chip bonding was performed by Finetech, achieving pixel-accurate alignment across the panel, according to the company.
The company says that this demonstration provides a pathway toward monolithic RGB displays based on red, green, and blue MicroLEDs previously demonstrated using the same material system.
Polar Light Technologies’ approach involves growing pyramidal MicroLEDs from the bottom up without etching steps. The company claims this process results in smaller pixels with improved brightness and efficiency. Additionally, the technology produces sub-Lambertian emission characteristics, creating a focused light lobe that couples into waveguides, potentially improving brightness in optical systems.
The company emerged as a spinoff from Professor Per-Olof Holtz’s research at Linköping University with financial backing from the Swedish Foundation for Strategic Research and Sweden’s innovation agency Vinnova. Polar Light Technologies describes itself as a supplier of wafer-level RGB MicroLED arrays for ultra-compact display applications.
