Patents by Inventor Natsuo Tatsumi
Natsuo Tatsumi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12215438Abstract: A single-crystal diamond includes n types of regions different in total concentration of an impurity, the n types of regions being observed in an observed surface being in parallel to a (110) face. Each of the n types of regions has an area not smaller than 0.1 ?m2. At least one of a first line, a second line, and a third line on the observed surface crosses a boundary between the n types of regions at least four times. The first line, the second line, and the third line are in parallel to a <?110> direction and have a length of 1 mm. A midpoint of the first line corresponds to the center of gravity of the observed surface. The second line and the third line are distant from the first line by 300 ?m in a <001> direction and a <00?1> direction, respectively.Type: GrantFiled: September 14, 2018Date of Patent: February 4, 2025Assignees: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Natsuo Tatsumi, Yoshiki Nishibayashi, Takuya Nohara, Akihiko Ueda, Yutaka Kobayashi
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Publication number: 20240377485Abstract: The present invention measures, with high sensitivity, the phase difference between a plurality of physical fields. A phase difference measurement device (10) comprises: an electromagnetic irradiation unit (2) that repeatedly irradiates a quantum sensor element (1) with electromagnetic waves for manipulating an electron spin state of the quantum sensor element (1) which changes via interaction with a second physical field or a first physical field generated by an AC signal; and a phase difference measurement unit (3) that acquires a plurality of electron spin states after interaction with the second physical field or the first physical field, and measures the phase difference between a plurality of physical fields on the basis of the acquired plurality of electron spin states.Type: ApplicationFiled: October 26, 2022Publication date: November 14, 2024Applicants: Kyoto University, NISSIN ELECTRIC CO., LTD.Inventors: Norikazu MIZUOCHI, Ernst David HERBSCHLEB, Hiroki MORISHITA, Hiroya SAITO, Hiroshige DEGUCHI, Natsuo TATSUMI, Tsukasa HAYASHI
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Publication number: 20240302460Abstract: A diamond magnetic sensor unit includes: a sensor part that includes a diamond having a color center with electron spin; an excitation light irradiation part that irradiates the diamond with excitation light; and a detection part that detects radiated light from the color center of the diamond, wherein the detection part detects the radiated light caused by irradiation of the diamond with the excitation light by the excitation light irradiation part without the diamond being irradiated with electromagnetic waves, and a conductive member that is disposed 10 mm or more apart from the sensor part, and transmits the electromagnetic waves can be included.Type: ApplicationFiled: January 26, 2022Publication date: September 12, 2024Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Yoshiki NISHIBAYASHI, Hiromi NAKANISHI, Hiroshige DEGUCHI, Tsukasa HAYASHI, Natsuo TATSUMI
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Publication number: 20240175945Abstract: A diamond magneto-optical sensor includes: a diamond including a color center with an electronic spin, and a reflecting surface that reflects excitation light propagated through an optical system into the diamond, wherein the reflecting surface reflects light radiated from the color center excited by the excitation light and condenses the light in the direction of the optical system.Type: ApplicationFiled: March 29, 2022Publication date: May 30, 2024Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hiroshige DEGUCHI, Natsuo TATSUMI, Tsukasa HAYASHI, Yoshiki NISHIBAYASHI
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Publication number: 20240168107Abstract: A diamond magneto-optical sensor includes: a diamond including a color center with an electronic spin, a transmission circuit that transmits electromagnetic waves, and an irradiation unit that irradiates the diamond with electromagnetic waves transmitted by the transmission circuit, wherein the transmission circuit includes an impedance converter that reduces or increases, with respect to the irradiation unit, the impedance of an electromagnetic source for outputting electromagnetic waves.Type: ApplicationFiled: March 29, 2022Publication date: May 23, 2024Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hiroshige DEGUCHI, Natsuo TATSUMI, Tsukasa HAYASHI, Yoshiki NISHIBAYASHI
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Publication number: 20240159845Abstract: A diamond magneto-optical sensor includes: a diamond that includes a color center with an electronic spin and is irradiated with excitation light, and an irradiation unit that irradiates the diamond with the excitation light of the color center and electromagnetic waves for magnetic resonance, wherein the irradiation unit receives modulated light having been subjected to amplitude modulation, and a modulation frequency of the modulated light is included in a microwave frequency band.Type: ApplicationFiled: March 29, 2022Publication date: May 16, 2024Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hiroshige DEGUCHI, Natsuo TATSUMI, Tsukasa HAYASHI, Yoshiki NISHIBAYASHI
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Publication number: 20240118327Abstract: A diamond sensor unit includes: a diamond having a color center with electron spin; an excitation light irradiation part that irradiates the diamond with excitation light; a first patch antenna that receives electromagnetic waves; an electromagnetic wave irradiation part that irradiates the diamond with the electromagnetic waves received by the first patch antenna; a detection part that detects radiated light radiated from the color center of the diamond after the diamond is irradiated with the excitation light and the electromagnetic waves; and an optical waveguide that transmits the excitation light and the radiated light.Type: ApplicationFiled: January 26, 2022Publication date: April 11, 2024Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Yoshiki NISHIBAYASHI, Hiromi NAKANISHI, Hiroshige DEGUCHI, Tsukasa HAYASHI, Natsuo TATSUMI
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Publication number: 20240111008Abstract: A diamond sensor unit includes: a sensor part that includes a diamond having a color center with electron spin; an irradiation part that irradiates the diamond with excitation light; a detection part that detects radiated light from the color center of the diamond; and an optical waveguide that transmits the excitation light, and the radiated light.Type: ApplicationFiled: January 26, 2022Publication date: April 4, 2024Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Yoshiki NISHIBAYASHI, Hiromi NAKANISHI, Hiroshige DEGUCHI, Tsukasa HAYASHI, Natsuo TATSUMI
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Patent number: 11692264Abstract: A method of manufacturing a diamond substrate includes: forming an ion implantation layer at a side of a main surface of a diamond seed substrate by implanting ions into the main surface of the diamond seed substrate; producing a diamond structure by growing a diamond growth layer by a vapor phase synthesis method on the main surface of the diamond seed substrate, after implanting the ions; and performing heat treatment on the diamond structure. The performed heat treatment causes the diamond structure to be separated along the ion implantation layer into a first structure including the diamond seed substrate and failing to include the diamond growth layer, and a diamond substrate including the diamond growth layer. Thus, the method of manufacturing a diamond substrate is provided that enables a diamond substrate with a large area to be manufactured in a short time and at a low cost.Type: GrantFiled: May 10, 2022Date of Patent: July 4, 2023Assignee: Sumitomo Electric Industries, Ltd.Inventors: Takuji Okahisa, Yoshiyuki Yamamoto, Yoshiki Nishibayashi, Natsuo Tatsumi
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Patent number: 11629104Abstract: This method for producing a body obtained by processing a solid carbon-containing material includes: a step of preparing the solid carbon-containing material having at least a surface composed of solid carbon; and a step of processing the solid carbon-containing material. The step of processing the solid carbon-containing material includes: a sub-step of forming non-diamond carbon by heat-treating the solid carbon in the surface of the solid carbon-containing material; and a sub-step of removing at least a part of the non-diamond carbon.Type: GrantFiled: August 13, 2018Date of Patent: April 18, 2023Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Kensei Hamaki
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Patent number: 11518680Abstract: A method for producing a body obtained by processing a solid carbon-containing material, the method includes: preparing the solid carbon-containing material composed of a material having at least a surface containing solid carbon; forming a gas phase fluid containing at least one of an active gas or an active plasma which are active against the solid carbon; and processing the solid carbon-containing material by injecting the gas phase fluid onto at least a part of the surface of the solid carbon-containing material.Type: GrantFiled: August 13, 2018Date of Patent: December 6, 2022Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Kensei Hamaki
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Publication number: 20220267894Abstract: A method of manufacturing a diamond substrate includes: forming an ion implantation layer at a side of a main surface of a diamond seed substrate by implanting ions into the main surface of the diamond seed substrate; producing a diamond structure by growing a diamond growth layer by a vapor phase synthesis method on the main surface of the diamond seed substrate, after implanting the ions; and performing heat treatment on the diamond structure. The performed heat treatment causes the diamond structure to be separated along the ion implantation layer into a first structure including the diamond seed substrate and failing to include the diamond growth layer, and a diamond substrate including the diamond growth layer. Thus, the method of manufacturing a diamond substrate is provided that enables a diamond substrate with a large area to be manufactured in a short time and at a low cost.Type: ApplicationFiled: May 10, 2022Publication date: August 25, 2022Applicant: Sumitomo Electric Industries, Ltd.Inventors: Takuji Okahisa, Yoshiyuki Yamamoto, Yoshiki Nishibayashi, Natsuo Tatsumi
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Patent number: 11371139Abstract: A method of manufacturing a diamond by a vapor phase synthesis method includes: preparing a substrate including a diamond seed crystal; forming a light absorbing layer lower in optical transparency than the substrate by performing ion implantation into the substrate, the light absorbing layer being formed at a predetermined depth from a main surface of the substrate; growing a diamond layer on the main surface of the substrate by the vapor phase synthesis method; and separating the diamond layer from the substrate by applying light from a main surface of at least one of the diamond layer and the substrate to allow the light absorbing layer to absorb the light and cause the light absorbing layer to be broken up.Type: GrantFiled: January 29, 2020Date of Patent: June 28, 2022Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Hitoshi Sumiya, Kazuo Nakamae
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Patent number: 11359275Abstract: A method of manufacturing a diamond substrate includes: forming an ion implantation layer at a side of a main surface of a diamond seed substrate by implanting ions into the main surface of the diamond seed substrate; producing a diamond structure by growing a diamond growth layer by a vapor phase synthesis method on the main surface of the diamond seed substrate, after implanting the ions; and performing heat treatment on the diamond structure. The performed heat treatment causes the diamond structure to be separated along the ion implantation layer into a first structure including the diamond seed substrate and failing to include the diamond growth layer, and a diamond substrate including the diamond growth layer. Thus, the method of manufacturing a diamond substrate is provided that enables a diamond substrate with a large area to be manufactured in a short time and at a low cost.Type: GrantFiled: September 25, 2020Date of Patent: June 14, 2022Assignee: Sumitomo Electric Industries, Ltd.Inventors: Takuji Okahisa, Yoshiyuki Yamamoto, Yoshiki Nishibayashi, Natsuo Tatsumi
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Publication number: 20210230766Abstract: Provided are a diamond composite body capable of shortening a separation time for separating a substrate and a diamond layer, the substrate, and a method for manufacturing a diamond, as well as a diamond obtained from the diamond composite body and a tool including the diamond. The diamond composite body includes a substrate including a diamond seed crystal and having grooves in a main surface, a diamond layer formed on the main surface of the substrate, and a non-diamond layer formed on a substrate side at a constant depth from an interface between the substrate and the diamond layer.Type: ApplicationFiled: April 12, 2021Publication date: July 29, 2021Applicant: Sumitomo Electric Industries, Ltd.Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Hitoshi Sumiya
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Patent number: 11007558Abstract: A diamond die includes a diamond provided with a hole for drawing a wire material, the diamond being a CVD single-crystal diamond, an axis of the hole being inclined relative to a normal direction of a crystal plane of the diamond.Type: GrantFiled: July 22, 2016Date of Patent: May 18, 2021Assignees: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.Inventors: Makoto Yukawa, Bunya Suemitsu, Takuya Kinoshita, Shigetoshi Sumimoto, Yutaka Kobayashi, Akihiko Ueda, Natsuo Tatsumi, Yoshiki Nishibayashi, Hitoshi Sumiya
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Patent number: 11001938Abstract: Provided are a diamond composite body capable of shortening a separation time for separating a substrate and a diamond layer, the substrate, and a method for manufacturing a diamond, as well as a diamond obtained from the diamond composite body and a tool including the diamond. The diamond composite body includes a substrate including a diamond seed crystal and having grooves in a main surface, a diamond layer formed on the main surface of the substrate, and a non-diamond layer formed on a substrate side at a constant depth from an interface between the substrate and the diamond layer.Type: GrantFiled: August 10, 2015Date of Patent: May 11, 2021Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Hitoshi Sumiya
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Publication number: 20210010131Abstract: A method of manufacturing a diamond substrate includes: forming an ion implantation layer at a side of a main surface of a diamond seed substrate by implanting ions into the main surface of the diamond seed substrate; producing a diamond structure by growing a diamond growth layer by a vapor phase synthesis method on the main surface of the diamond seed substrate, after implanting the ions; and performing heat treatment on the diamond structure. The performed heat treatment causes the diamond structure to be separated along the ion implantation layer into a first structure including the diamond seed substrate and failing to include the diamond growth layer, and a diamond substrate including the diamond growth layer. Thus, the method of manufacturing a diamond substrate is provided that enables a diamond substrate with a large area to be manufactured in a short time and at a low cost.Type: ApplicationFiled: September 25, 2020Publication date: January 14, 2021Applicant: Sumitomo Electric Industries, Ltd.Inventors: Takuji Okahisa, Yoshiyuki Yamamoto, Yoshiki Nishibayashi, Natsuo Tatsumi
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Publication number: 20200361829Abstract: This method for producing a body obtained by processing a solid carbon-containing material includes: a step of preparing the solid carbon-containing material having at least a surface composed of solid carbon; and a step of processing the solid carbon-containing material. The step of processing the solid carbon-containing material includes: a sub-step of forming non-diamond carbon by heat-treating the solid carbon in the surface of the solid carbon-containing material; and a sub-step of removing at least a part of the non-diamond carbon.Type: ApplicationFiled: August 13, 2018Publication date: November 19, 2020Applicant: Sumitomo Electric Industries, Ltd.Inventors: Yoshiki NISHIBAYASHI, Natsuo TATSUMI, Kensei HAMAKI
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Publication number: 20200361778Abstract: A method for producing a body obtained by processing a solid carbon-containing material, the method includes: preparing the solid carbon-containing material composed of a material having at least a surface containing solid carbon; forming a gas phase fluid containing at least one of an active gas or an active plasma which are active against the solid carbon; and processing the solid carbon-containing material by injecting the gas phase fluid onto at least a part of the surface of the solid carbon-containing material.Type: ApplicationFiled: August 13, 2018Publication date: November 19, 2020Applicant: Sumitomo Electric Industries, Ltd.Inventors: Yoshiki NISHIBAYASHI, Natsuo TATSUMI, Kensei HAMAKI