Stanley Electric has been granted a patent for group-III nitride nanoparticles that improve luminous efficiency by preventing strains on the nanoparticles. The nanoparticles have a unique structure, incorporating both wurtzite and zincblende crystal structures. They can be produced using a phosphorus-containing solvent, and have an elliptical or rod-like shape. GlobalData’s report on Stanley Electric gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Stanley Electric, Under-screen biometric identification was a key innovation area identified from patents. Stanley Electric's grant share as of September 2023 was 31%. Grant share is based on the ratio of number of grants to total number of patents.

Patent granted for group-iii nitride semiconductor nanoparticles with dual crystal structures

Source: United States Patent and Trademark Office (USPTO). Credit: Stanley Electric Co Ltd

A recently granted patent (Publication Number: US11767469B2) describes a new type of group-III nitride semiconductor nanoparticle. The nanoparticle is represented by the formula AlxGayInzN, where the values of x, y, and z range from 0 to 1. The unique feature of this nanoparticle is that it contains two crystal structures, namely a wurtzite structure and a zincblende structure, within a single particle. The nanoparticle can have either an elliptical shape or a rod-like shape.

According to the patent claims, the ratio of the zincblende structure within the particle is important. Claim 2 states that the particle should have a ratio of zincblende structure in the range of 25% to 50% based on XRD diffraction intensity. Claim 3 further narrows down the range to 30% to 50% based on XRD diffraction intensity.

Another aspect of the invention is the core-shell structure of the nanoparticle. Claim 4 describes a group-III nitride semiconductor nanoparticle with a core-shell structure, where the core contains the two crystal structures (wurtzite and zincblende) within the particle. The core and the shell have different lattice constants.

The shape of the nanoparticle is also mentioned in the claims. Claim 6 states that the nanoparticle can have a rod-like shape or a disk-like shape.

Overall, this patent describes a novel group-III nitride semiconductor nanoparticle with two crystal structures (wurtzite and zincblende) within a single particle. The patent claims specify the desired ratio of zincblende structure and the possible shapes of the nanoparticle. This invention could have potential applications in various fields, including electronics, optoelectronics, and photonics.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.