Swedish company showcases first pyramid structure MicroLED display prototype

On May 5, Swedish Micro LED technology company Polar Light Technologies ("PLT") announced that the company has successfully manufactured the first microdisplay prototype based on its own patented pyramid structure Micro LED (μLED) technology, which represents the feasibility of integrating the pyramid structure Micro LED front substrate into a CMOS backplane.

Image source: Polar Light Technologies

It is reported that PLT focuses on using atomic layer deposition (ALD) technology to grow pyramid-structured gallium nitride Micro LEDs on silicon carbide substrates. This pyramidal structure is grown through a novel bottom-up technique without the use of etching technology, providing the LED chip with narrow beam characteristics, further improving the performance of Micro LED and maintaining sub-micron dimensions.


Compared with conventional LEDs, pyramid structure Micro LEDs can increase AR system efficiency by 50 to 200 times by improving internal and external quantum efficiency and enhancing light utilization. By reducing internal electric field interference and optimizing the interaction of charge carriers in quantum wells, Micro LEDs are able to produce more light and have a clearer, narrower emission spectrum. Therefore, PLT said that pyramid structure Micro LED is very suitable for applications such as augmented reality (AR) and micro projectors that require precise light control.

The microdisplay prototype released this time combines a monochromatic μLED front substrate created with PLT pyramid structure Micro LED technology and a high-performance CMOS backplane from Korean semiconductor company SAPIEN. The flip-chip bonding process was completed by Finetech, a developer of chip bonding solutions, achieving full-panel pixel-level alignment.

PLT stated that the release of this concept prototype product shows that the company's pyramid structure Micro LED can be mixed and integrated with mainstream CMOS drivers to form a microdisplay. This latest achievement provides a new path to realize a single-chip full-color display, which is created using red, green, and blue Micro LEDs in the same material system.

It is worth noting that in December last year, PLT successfully produced 625nm red light based on a unique pyramid structure. Since then, PLT has developed red, green, and blue pyramid structure Micro LEDs using the same compound materials, laying the foundation for the realization of monolithic RGB displays.

In April this year, PLT completed a new round of financing and plans to bring its innovative Micro LED technology to the market in 2026.