Patents Assigned to Waseda University
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Patent number: 11810885Abstract: A semiconductor element bonding structure capable of strongly bonding a semiconductor element and an object to be bonded and relaxing thermal stress caused by a difference in thermal expansion, by interposing metal particles and Ni between the semiconductor element and the object to be bonded, the metal particles having a lower hardness than Ni and having a micro-sized particle diameter. A plurality of metal particles 5 (aluminum (Al), for example) having a lower hardness than nickel (Ni) and having a micro-sized particle diameter are interposed between a semiconductor chip 3 and a substrate 2 to be bonded to the semiconductor chip 3, and the metal particles 5 are fixedly bonded by the nickel (Ni). Optionally, aluminum (Al) or an aluminum alloy (Al alloy) is used as the metal particles 5, and aluminum (Al) or an aluminum alloy (Al alloy) is used on the surface of the semiconductor chip 3 and/or the surface of the substrate 2.Type: GrantFiled: February 26, 2021Date of Patent: November 7, 2023Assignee: WASEDA UNIVERSITYInventors: Kohei Tatsumi, Yasunori Tanaka
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Publication number: 20230317245Abstract: The present invention is a medical treatment system using an information processing terminal and an information processing network, and a method using said system, wherein the objective of the invention is to provide: a system that performs optimal medical treatment to a patient on the basis of a diagnostic cross-sectional assessment and/or a disease-specific assessment, such that treatment using process-based CBT is possible; and a method using said system. Toward this end, this system (100) has: a block (10A1: diagnostic cross-sectional assessment part) having a function for, while using normal lifestyle date, assessing the degree to which a patient is adaptively behaving, or non-adaptively behaving, in response to psychosocial issue, lifestyle adaptation, stress, etc.Type: ApplicationFiled: September 1, 2021Publication date: October 5, 2023Applicants: WASEDA UNIVERSITY, LOGOS SCIENCE CORPORATIONInventors: Hiroaki KUMANO, Junichi SAITO, Naoki URUSHIHATA, Hideki TANEMURA, Mohammad GHAZIZADEH, Chigusa SHIMOKAWA
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Publication number: 20230252192Abstract: A hardware trojan detection method is provided including an input and output updating step of updating input and output values of all logic cells by performing computations according to logical expressions of all logic cells included in a netlist to be verified and a detection step of performing hardware trojan detection based on a comparison result of the updated input and output values and a threshold.Type: ApplicationFiled: June 23, 2021Publication date: August 10, 2023Applicants: TOSHIBA INFORMATION SYSTEMS (JAPAN) CORPORATION, Waseda UniversityInventors: Shinichi NAGATA, Koji TAKAHASHI, Nozomu TOGAWA, Masaru OYA
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Publication number: 20230243364Abstract: An impeller includes a hub having a circular plate shape with an axial line as a center, a shroud disposed to face the hub in a direction of the axial line, and a plurality of blades disposed with a space from each other in a circumferential direction between the hub and the shroud. A meridian plane shape of the impeller differs in the circumferential direction.Type: ApplicationFiled: December 30, 2022Publication date: August 3, 2023Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., WASEDA UNIVERSITYInventors: Satoshi Maeda, Takeshi Sano, Shinji Fukao, Atsushi Nakagawa, Keisuke Matsumoto, Kazuyoshi Miyagawa
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Patent number: 11676935Abstract: A bonding method is capable of realizing high bonding strength and connection reliability even at a connection part in a high temperature area by means of simple operation low temperature bonding. The method includes a first step wherein, on at least one of the bonded surfaces of two materials to be bonded having a smooth surface, a thin film of noble metal with a volume diffusion coefficient greater than that of the base metal of the material to be bonded is formed using an atomic layer deposition method at a vacuum of 1.0 Pa or higher, a second step wherein a laminate is formed by overlapping the two materials to be bonded so that the bonded surfaces of the two materials are connected through the thin film, and a third step wherein the two materials to be bonded are bonded by holding the laminate at a predetermined temperature.Type: GrantFiled: April 3, 2020Date of Patent: June 13, 2023Assignees: WASEDA UNIVERSITY, HARIMA CHEMICALS, INC.Inventors: Jun Mizuno, Hiroyuki Kuwae, Kosuke Yamada, Masami Aihara, Takayuki Ogawa
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Patent number: 11639403Abstract: A polymer includes a repeating unit represented by at least one of Formula 1a or Formula 1b: wherein, in Formulae 1a or 1b, CY1 is a group represented by at least one of Formula 1-2 or Formula 1-4, CY2 is a group represented by Formula 1-3, and L1, L2, a1, and a2 are defined the same as in the specification, and in Formulae 1-2, Formula 1-3, or 1-4, X, Y, R1, R2, R11 to R14, b1, b2, R21, R22, b21, b22, Z1, Z2, c1, and c2 are defined the same as in the specification.Type: GrantFiled: November 11, 2019Date of Patent: May 2, 2023Assignees: SAMSUNG ELECTRONICS CO., LTD., WASEDA UNIVERSITYInventors: Wonsung Choi, Hiroyuki Nishide, Seokgwang Doo, Kenichi Oyaizu
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Publication number: 20230100804Abstract: Provided is a conductive material that is capable of achieving a high-electric conductivity, long-term stability under an atmospheric environment, heat and high humidity stabilities, as well as a conductive film and a solar cell using the same. The conductive material includes a mixture of carbon nanotubes (CNTs) and polystyrene sulfonic acid (PSS acid). The element ratio (S/C ratio) of sulfur (S) to carbon (C) in the mixture may be from 0.001 to 0.1 in terms of the number of atoms. CNTs and PSS acid may make up a content percentage of 10 wt % or more in the mixture. These conductive films comprised of the conductive material 6 may have a weight per unit area of the CNTs in the range from 1 mg/m2 to 10000 mg/m2. The solar cell may include the conductive film 7, wherein the film is on the surface of a semiconductor.Type: ApplicationFiled: July 9, 2020Publication date: March 30, 2023Applicants: Waseda University, Sino-Japan Electric Heater Co., Ltd.Inventors: Suguru Noda, Rongbin Xie
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Publication number: 20230077049Abstract: A method for generating carbon monoxide includes: a generation step of generating carbon monoxide by supplying carbon dioxide to a first material containing a first element included in elements of group 11 and a second element included in elements of groups 8 to 10, 12, and 13; and a reduction step of reducing the second element oxidized in the generation step by supplying hydrogen to a second material containing the oxidized second element and the first element. The generation step and the reduction step are repeated a plurality of times.Type: ApplicationFiled: January 20, 2021Publication date: March 9, 2023Applicants: ENEOS Corporation, WASEDA UNIVERSITYInventors: Yasushi HASHIMOTO, Yasushi SATO, Yasushi SEKINE
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Patent number: 11597943Abstract: A transgenic plant which exhibits a growth capacity which is enhanced compared to that of a host plant, and has a chimeric protein of a peptide containing an amino acid sequence derived from a motor domain of myosin XI of a donor plant 1, which is a plant species other than the host plant, and a peptide containing an amino acid sequence derived from a domain other than the motor domain of myosin XI of a donor plant 2, which is the host plant or a plant species other than the host plant, the transgenic plant being characterized in that the motor domain loop 2 region has EEPKQGGKGGGKSSFSSIG or EEPKQGGGKGGSKSSFSSIG, and in addition to these sequences, has an amino acid sequence in which one to six amino acids have been deleted, replaced or added.Type: GrantFiled: March 24, 2020Date of Patent: March 7, 2023Assignees: WASEDA UNIVERSITY, NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITYInventors: Motoki Tominaga, Kohji Ito
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Publication number: 20230026457Abstract: Provided is an electrode material which is suitable for use as a material for forming electrodes for use in lithium ion secondary batteries, etc. and which makes it possible to heighten the rate characteristics of batteries. The electrode material is characterized by comprising a polymer having, in a side chain, a fluoflavin skeleton such as that shown by the formula and an inorganic active material, the polymer being contained in an amount of 1 mass % or less with respect to the solid components.Type: ApplicationFiled: November 24, 2020Publication date: January 26, 2023Applicants: WASEDA UNIVERSITY, NISSAN CHEMICAL CORPORATIONInventors: Kenichi OYAIZU, Kan HATAKEYAMA, Tomoki AKAHANE, Choitsu GO, Takahiro KASEYAMA
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Patent number: 11539185Abstract: A laser apparatus includes: a light source configured to generate laser light; and an optical negative feedback unit configured to narrow a spectral line of the laser light using optical negative feedback. A modulation signal is input to the light source to modulate a frequency of the laser light. A modulation amount in the frequency of the laser light is detected. A modulation sensitivity is calculated from (i) the modulation amount and (ii) an intensity of the modulation signal.Type: GrantFiled: March 23, 2021Date of Patent: December 27, 2022Assignees: DENSO CORPORATION, TOHOKU UNIVERSITY, WASEDA UNIVERSITYInventors: Masashige Sato, Taku Suzuki, Hiroshi Yasaka, Nobuhide Yokota, Tomohiro Kita
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Publication number: 20220397501Abstract: A fracture toughness testing machine of the invention makes it possible to evaluate fracture toughness of a specimen in pure mode such that the effect of thermal residual stresses is removed, when the stresses are present in the specimen obtained by bonding dissimilar materials. The testing machine includes: testing-load applying means for applying a predetermined testing load to the specimen, in which the stresses are present; and cancelling-load applying means for applying a cancelling load to the specimen to cancel the stresses therein. The cancelling-load applying means includes: a pressing-force applying portion that applies a pressing force to the specimen as the canceling load; and a pressing-force determining portion that determines magnitude of the force. The pressing-force determining portion calculates the magnitude of the force using pre-stored equations so that an energy release rate related to in-plane shear mode crack deformation becomes zero.Type: ApplicationFiled: November 13, 2020Publication date: December 15, 2022Applicants: WASEDA UNIVERSITY, KANAGAWA INSTITUTE OF INDUSTIAL SCIENCE AND TECHNOLOGY, JP STEEL PLANTECH CO.Inventors: Atsushi Hosoi, Hiroyuki Kawada, Kazuki Harada, Kristine Munk Jespersen
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Patent number: 11527378Abstract: It is a CNT device (1) (carbon-metal structure) equipped with a carbon nanotube layer (2) (CNT layer 2; same hereafter) on a metal pedestal (4). The metal pedestal (4) is brazed to the CNT layer (2) with a brazing material layer (3) interposed therebetween. When manufacturing the CNT device (1), firstly, the CNT layer (2) is formed on a heat-resistant textured substrate (6). Next, the metal pedestal (4) is brazed to the CNT layer (2) that is on the heat-resistant textured substrate (6) with the brazing material layer (3) interposed therebetween. Then, the metal pedestal (4) (and the CNT layer 2) is peeled off the heat-resistant textured substrate (6) to transfer the CNT layer (2) from the heat-resistant textured substrate (6) to the metal pedestal (4).Type: GrantFiled: October 21, 2019Date of Patent: December 13, 2022Assignees: WASEDA UNIVERSITY, MEIDENSHA CORPORATIONInventors: Suguru Noda, Sae Kitagawa, Kotaro Yasui, Hisashi Sugime, Daizo Takahashi, Yuichi Nishikiori, Hayato Ochi, Rena Takahashi, Toshimasa Fukai
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Patent number: 11492884Abstract: A methane hydrate production method comprising a step of performing a reservoir grouting process. The reservoir grouting process comprises: injecting a grouting agent into a frozen soil reservoir on the land or a seabed reservoir for targeting methane hydrate existing within sand particles of the target reservoirs; or injecting a filling material into cavities naturally or artificially occurred in a frozen soil reservoir on the land or a seabed reservoir for targeting methane hydrate existing within sand particles of the target reservoirs, and enabling a grouting body being constructed.Type: GrantFiled: September 11, 2018Date of Patent: November 8, 2022Assignees: Japan E&P International Corporation, Waseda UniversityInventors: Yuchen Liu, Masanori Kurihara
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Patent number: 11444004Abstract: A cooler of the present invention is provided with a case having a top plate, a bottom plate, and a side plate, cooling fins disposed inside the case, and a flow path for cooling fluid that comes into contact with the cooling fins and that flows through the interior of the case, the cooler cooling an object to be cooled in contact with the top plate or the bottom plate. The cooling fins have a shaft part and vane parts that protrude outward from the shaft part and extend spirally in the axial direction; the overall cooling fin configuration constituting a quadrangular column shape. The cooling fins are disposed in contact with at least the top plate and the bottom plate, and the flow path has a spiral-formed configuration formed by the vane parts, the top plate, and the bottom plate.Type: GrantFiled: March 2, 2020Date of Patent: September 13, 2022Assignees: FUJI ELECTRIC CO., LTD., WASEDA UNIVERSITYInventors: Ryoichi Kato, Yoshinari Ikeda, Hiromichi Gohara, Tomoyuki Miyashita, Shingo Otake
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Publication number: 20220283291Abstract: To provide a foreign-object system which uses a plurality of radars, and which can detect a foreign object that is present on a runway or the like and which can suppress interference between radars. A foreign-object detection system including a first radar 11, a second radar 21 connected to the first radar via a network 33, and a signal source 31 for transmitting a synchronization signal to the first radar and the second radar via the network, said foreign-object detection system wherein interference generated due to a radar signal outputted from the second radar being reflected by a reflective body and inputted to the first radar is prevented by controlling a delay time that corresponds to |?1i??2j|, where ?1i is the time taken for the synchronization signal to be transmitted from the signal source to the first radar, and ?2j is the time taken for the synchronization signal to be transmitted from the signal source to the second radar.Type: ApplicationFiled: December 28, 2021Publication date: September 8, 2022Applicant: WASEDA UNIVERSITYInventor: Tetsuya KAWANISHI
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Publication number: 20220274836Abstract: Provided are a carbon nanotube production device and production method capable of realizing high-temperature heating of a catalyst raw material in a floating catalyst chemical vapor deposition (FCCVD) method, and improving the quality and yield of carbon nanotubes synthesized. A carbon nanotube production device 1 includes a synthesis furnace 2 for synthesizing carbon nanotubes; a catalyst raw material supplying nozzle 3 for supplying a catalyst raw material used to synthesize carbon nanotubes to the synthesis furnace 2; and a nozzle temperature adjusting unit 6 capable of setting a temperature of an inner portion 4 of the catalyst raw material supplying nozzle 3 higher than a temperature of a reaction field 5 of the synthesis furnace 2.Type: ApplicationFiled: July 27, 2020Publication date: September 1, 2022Applicants: WASEDA UNIVERSITY, MEIJO NANO CARBON CO., LTD.Inventors: Suguru NODA, Katsuya NAMIKI, Zihao ZHANG, Toshio OSAWA, Hisashi SUGIME
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Publication number: 20220259697Abstract: There is provided a method for recovering PGM, in which at least one base metal oxide selected from a group consisting of copper oxide, iron oxide, tin oxide, nickel oxide and lead oxide is added to and melted in a molten slag, and a PGM alloy contained in the molten slag is recovered.Type: ApplicationFiled: July 6, 2020Publication date: August 18, 2022Applicants: WASEDA UNIVERSITY, DOWA METALS & MINING CO., LTD., NIPPON PGM CO., LTD.Inventors: Keiichi SUGAWARA, Hiromitsu YATSUHASHI, Katsunori YAMAGUCHI, Takashi MURATA
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Publication number: 20220246575Abstract: A bonding method is capable of realizing high bonding strength and connection reliability even at a connection part in a high temperature area by means of simple operation low temperature bonding. The method includes a first step wherein, on at least one of the bonded surfaces of two materials to be bonded having a smooth surface, a thin film of noble metal with a volume diffusion coefficient greater than that of the base metal of the material to be bonded is formed using an atomic layer deposition method at a vacuum of 1.0 Pa or higher, a second step wherein a laminate is formed by overlapping the two materials to be bonded so that the bonded surfaces of the two materials are connected through the thin film, and a third step wherein the two materials to be bonded are bonded by holding the laminate at a predetermined temperature.Type: ApplicationFiled: April 3, 2020Publication date: August 4, 2022Applicants: WASEDA UNIVERSITY, HARIMA CHEMICALS, INC.Inventors: Jun MIZUNO, Hiroyuki KUWAE, Kosuke YAMADA, Masami AIHARA, Takayuki OGAWA
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Patent number: 11364486Abstract: A supported catalyst comprises: a support that is particulate; and a composite layer laminate formed outside the support and including two or more composite layers, wherein each of the composite layers includes a catalyst portion containing a catalyst and a metal compound portion containing a metal compound, the support contains 10 mass % or more of each of Al and Si, and a volume-average particle diameter of the support is 50 ?m or more and 400 ?m or less.Type: GrantFiled: February 17, 2017Date of Patent: June 21, 2022Assignees: WASEDA UNIVERSITY, ZEON CORPORATIONInventors: Suguru Noda, Kosuke Kawabata, Takayoshi Hongo