3 patents
Utility
Devices, Systems, and Methods for Distributed Game Architecture
17 Jun 21
Devices, systems, and methods of the present disclosure are directed to providing a Science, Technology, Engineering, and Mathematics (STEM) based distributed games that allows two or more teams of players to develop mathematical and problem-solving skills.
Christian Pruett
Filed: 11 Dec 19
Utility
Deep Ultraviolet Led and Method for Producing the Same
4 Feb 21
A deep ultraviolet LED with a design wavelength λ, including a reflecting electrode layer (Au), a metal layer (Ni), a p-GaN contact layer, a p-block layer made of a p-AlGaN layer, an i-guide layer made of an AlN layer, a multi-quantum well layer, an n-AlGaN contact layer, a u-AlGaN layer, an AlN template, and a sapphire substrate that are arranged in this order from a side opposite to the sapphire substrate, in which the thickness of the p-block layer is 52 to 56 nm, a two-dimensional reflecting photonic crystal periodic structure having a plurality of voids is provided in a region from the interface between the metal layer and the p-GaN contact layer to a position not beyond the interface between the p-GaN contact layer and the p-block layer in the thickness direction of the p-GaN contact layer, the distance from an end face of each of the voids in the direction of the sapphire substrate to the interface between the multi-quantum well layer and the i-guide layer satisfies λ/2n1Deff (where λ is the design wavelength and n1Deff is the effective average refractive index of each film of the stacked structure from the end face of each void to the i-guide layer) in the perpendicular direction, the distance being in the range of 53 to 57 nm, the two-dimensional reflecting photonic crystal periodic structure has a photonic band gap that opens for TE polarized components, and provided that the period a of the two-dimensional reflecting photonic crystal periodic structure satisfies a Bragg condition with respect to light with the design wavelength λ, the order m of a formula of the Bragg condition: mλ/n2Deff=2a (where m is the order, λ is the design wavelength, n2Deff is the effective refractive index of two-dimensional photonic crystals, and a is the period of the two-dimensional photonic crystals) satisfies 2≤m≤4, and the radius of each void is R, R/a satisfies 0.30≤R/a≤0.40.
Yukio KASHIMA, Eriko MATSUURA, Mitsunori KOKUBO, Takaharu TASHIRO, Hideki HIRAYAMA, Noritoshi MAEDA, Masafumi JO, Ryuichiro KAMIMURA, Yamato OSADA, Kanji FURUTA, Takeshi IWAI, Yohei AOYAMA, Yasushi IWAISAKO, Tsugumi NAGANO, Yasuhiro WATANABE
Filed: 25 Jan 19
Utility
Deep Ultraviolet Led and Method for Manufacturing the Same
30 Sep 20
Provided is a deep ultraviolet LED with a design wavelength λ, including a reflecting electrode layer, an ultra-thin metal layer, and a p-type contact layer that are arranged in this order from a side opposite to a substrate; and a hemispherical lens bonded to a rear surface of the substrate on a side of the p-type contact layer, the hemispherical lens being transparent to light with the wavelength λ.
Yukio KASHIMA, Eriko MATSUURA, Mitsunori KOKUBO, Takaharu TASHIRO, Hideki HIRAYAMA, Ryuichiro KAMIMURA, Yamato OSADA, Toshiro MORITA
Filed: 27 Apr 20
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