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Aledia: Ranked Second For Nanowire LED Patents


Cea-Leti spin-off benefits from a strong patent portfolio to address an $120 billion displays market, says Knowmade

Earlier this year Aledia, a Cea-Leti spin-off developing nanowire 3D LEDs, announced plans to build its first manufacturing facility in the Grenoble area, France. The company plans to enter mass production of micro-displays by 2022 to address a market estimated to be worth around $120 billion related to displays for computers, tablets, smartphones and AR glasses.

Jointly with Cea-Leti, Aledia has developed 3D LEDs based on GaN nanowires grown on large-area Si substrates, leading to the filing of more than 100 patent families (single inventions filed in multiple countries) since 2012, grouping more than 440 patents and pending patent applications worldwide, according to IP strategy consulting company Knowmade, which has been researching the patent landscape this year.

“Aledia's inventions included in the GaN-on-Silicon patent landscape are mainly related to the growth of the nanowire emitters in large quantities with a high degree of precision and control,” says Remi Comyn, an analyst at Knowmade.

Additional inventions concern fabrication of electrical contacts on GaN nanostructures (US9991342, US10340138), and device manufacturing issues (e.g. dry etching US20190172970), the removal of defective nanowires (US9299882), the monolithic integration of LEDs with devices such as transistors to control the nanowire LEDs (US10050080) or to detect the LED temperature (US20160197064).

“Interestingly, more than 180 patent applications have already been granted, putting the emphasis on Europe (90+ patents) and the USA (50+ patents), although a significant number of patents were also granted in Asia (China: 19, Japan: ten, South Korea: four and Taiwan: four),” says Comyn. “Importantly, 29 patent families have not got a granted member yet; mostly inventions filed in the last three years and related to display applications (21)."”

As of September 2020, Aledia owns 58 patent families focused on nanowire LEDs (Figure 1a above). The startup first considered residential lighting and automotive lighting as the most promising markets for its novel technology, explaining the presence of companies such as Ikea and Valeo among its investors.

However, the French startup eventually decided to target display applications, which translated into more than 40 additional patent families related to displays in Aledia's portfolio, with more than 30 patent applications filed in the last three years. In the Nanowire LED patent landscape, several players such as Samsung and glō are following a similar trend. As a result, the patenting activity related to nanowire-based micro-displays took off in 2016/2017 and is expected to accelerate in 2020/2021 as more and more players are racing towards micro-LED commercialisation (Figure 1b).

Another component of Aledia's strategic move towards display applications, says Knowmade, is that Intel joined the rank of investors in 2018. At the same time, the US company was identified by Knowmade as a new entrant in the Nanowire LED patent landscape, with a relatively similar approach to Aledia and a strong focus on micro-LED displays (Figure 1a). “Intel is developing manufacturing approaches for micro-LED structures and displays based on the assembly of nanowires, including GaN nanowires, on Si substrates,” explains Comyn.

Indeed, Knowmade has identified 19 inventions from Intel in the Nanowire LED patent landscape, mostly filed in the USA. As of September 2020, 5 US patents have already been granted to Intel.

Furthermore, Aledia can rely on additional patents from its R&D partner Cea-Leti, which is well-established in nanowire LEDs and GaN-on-Silicon for optoelectronics. The institute owns 50 patent families related to nanowire LEDs with more than 170 patents granted in the US (40+), Europe (30+), China (15) and Japan (15).

At least five inventions focus on displays (e.g. US8890111). Also, 19 of these inventions belong to the GaN-on-Silicon for optoelectronics patent landscape, where Cea is a well-established player (30+ inventions). Overall, between its own patents and IP agreements with partners, Aledia benefits from a strong patent portfolio of more than 170 patent families to protect the features of its technology in view of commercialization. In conclusion, major endeavors in R&D over the last three years to improve the nanowire LED technology for displays, together with its global IP strategy, have put Aledia in a good position to face the tough competition in an emerging micro-LED display market.

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