With the continuous increase in demand for AR/VR devices, Micro LED micro display technology is accelerating from laboratory research and development to commercial implementation. On the one hand, the chip size approaches the sub micron level, which puts higher demands on processes and materials; On the other hand, full-color technologies such as quantum dot color conversion and RGB vertical stacking continue to make progress. Recently, there have been new breakthroughs in both the European industry and academia, which are expected to further accelerate the landing of full-color Micro LED micro display technology.

Swedish Micro LED company Polar Light Technologies recently teamed up with chip bonding manufacturer Finetech to receive 1.1 million euros in funding support from the EU Eurostars project to jointly promote a project called "2ndGenMicroLED". The project has a duration of 18 months and aims to develop a higher integration dual color Micro LED micro display prototype through advanced process technology.

In this project, Polar Light will use its self-developed bottom-up mask deposition process to develop dual color Micro LED devices. Compared to traditional epitaxial etching schemes, this process has more advantages in nanoscale size control and material utilization; Finetech provides high-precision chip bonding solutions to assist in efficient chip integration.

Polar Light has been developing single-chip full-color technology since 2014, and has identified indium gallium nitride (InGaN) fund shaped micro LED structure as the preferred solution. In May 2025, the company released its first Micro LED micro display prototype and has been continuously optimizing device size and luminous performance ever since.

At the beginning of 2026, Polar Light successfully prepared InGaN LED devices with a size of 500 nanometers or less, which is currently the smallest size LED publicly reported. The company plans to launch the first batch of commercial products in 2026, focusing on monochrome Micro LED micro displays and gradually expanding to multi-color and full-color solutions.

In terms of financing, Polar Light has been continuously recognized by the market: it completed a new round of financing of over 5 million euros in January 2026, with a total financing of 13 million euros. The company plans to launch a pilot line for monochrome green display screens in the fourth quarter of 2026, based on CMOS substrates and using self-developed 5-micron etching free pyramid shaped Micro LED structures to prepare devices; At the same time, we will continue to promote the single-chip full-color technology route and aim to launch full-color products by 2028, which is consistent with the prediction of Jibang Consulting - full-color LEDoS devices will enter the mature commercial stage in 2027-2028, coupled with the rapid growth of demand for AR smart glasses, and the huge market potential.

Scientific breakthrough: CEA Leti overcomes the color conversion problem of submicron Micro LED

In the field of materials, the French research institution CEA Leti has made key progress: using pulsed laser deposition (PLD) technology, it has successfully developed green and red perovskite thin film color conversion layers (CCL), opening up a new path for high-resolution microdisplays.

Currently, quantum dots (QDs) are widely used for color conversion in Micro LEDs, but their absorption rate is low, requiring a thickness of 3-10 microns to achieve effective conversion, becoming the core bottleneck for the continuous reduction of pixel size.

For this purpose, CEA Leti selected inorganic halide perovskite materials - CsPbBr ∝ for green light and CsPbI ₂ Br for red light, and achieved uniform deposition on a 200mm wafer at room temperature through pulsed laser deposition technology. This type of material has advantages such as direct bandgap, high absorption coefficient (about 10 ⁵ cm ⁻¹), and narrow emission full width at half maximum (17nm at 516nm for green light and 31nm at 640nm for red light).