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).

  • Patent number: 12215438
    Abstract: 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: Grant
    Filed: September 14, 2018
    Date of Patent: February 4, 2025
    Assignees: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Natsuo Tatsumi, Yoshiki Nishibayashi, Takuya Nohara, Akihiko Ueda, Yutaka Kobayashi
  • Publication number: 20240377485
    Abstract: 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: Application
    Filed: October 26, 2022
    Publication date: November 14, 2024
    Applicants: Kyoto University, NISSIN ELECTRIC CO., LTD.
    Inventors: Norikazu MIZUOCHI, Ernst David HERBSCHLEB, Hiroki MORISHITA, Hiroya SAITO, Hiroshige DEGUCHI, Natsuo TATSUMI, Tsukasa HAYASHI
  • Publication number: 20240302460
    Abstract: 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: Application
    Filed: January 26, 2022
    Publication date: September 12, 2024
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yoshiki NISHIBAYASHI, Hiromi NAKANISHI, Hiroshige DEGUCHI, Tsukasa HAYASHI, Natsuo TATSUMI
  • Publication number: 20240175945
    Abstract: 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: Application
    Filed: March 29, 2022
    Publication date: May 30, 2024
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hiroshige DEGUCHI, Natsuo TATSUMI, Tsukasa HAYASHI, Yoshiki NISHIBAYASHI
  • Publication number: 20240168107
    Abstract: 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: Application
    Filed: March 29, 2022
    Publication date: May 23, 2024
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hiroshige DEGUCHI, Natsuo TATSUMI, Tsukasa HAYASHI, Yoshiki NISHIBAYASHI
  • Publication number: 20240159845
    Abstract: 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: Application
    Filed: March 29, 2022
    Publication date: May 16, 2024
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hiroshige DEGUCHI, Natsuo TATSUMI, Tsukasa HAYASHI, Yoshiki NISHIBAYASHI
  • Publication number: 20240118327
    Abstract: 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: Application
    Filed: January 26, 2022
    Publication date: April 11, 2024
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yoshiki NISHIBAYASHI, Hiromi NAKANISHI, Hiroshige DEGUCHI, Tsukasa HAYASHI, Natsuo TATSUMI
  • Publication number: 20240111008
    Abstract: 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: Application
    Filed: January 26, 2022
    Publication date: April 4, 2024
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yoshiki NISHIBAYASHI, Hiromi NAKANISHI, Hiroshige DEGUCHI, Tsukasa HAYASHI, Natsuo TATSUMI
  • Patent number: 11692264
    Abstract: 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: Grant
    Filed: May 10, 2022
    Date of Patent: July 4, 2023
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takuji Okahisa, Yoshiyuki Yamamoto, Yoshiki Nishibayashi, Natsuo Tatsumi
  • Patent number: 11629104
    Abstract: 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: Grant
    Filed: August 13, 2018
    Date of Patent: April 18, 2023
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Kensei Hamaki
  • Patent number: 11518680
    Abstract: 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: Grant
    Filed: August 13, 2018
    Date of Patent: December 6, 2022
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Kensei Hamaki
  • Publication number: 20220267894
    Abstract: 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: Application
    Filed: May 10, 2022
    Publication date: August 25, 2022
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takuji Okahisa, Yoshiyuki Yamamoto, Yoshiki Nishibayashi, Natsuo Tatsumi
  • Patent number: 11371139
    Abstract: 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: Grant
    Filed: January 29, 2020
    Date of Patent: June 28, 2022
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Hitoshi Sumiya, Kazuo Nakamae
  • Patent number: 11359275
    Abstract: 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: Grant
    Filed: September 25, 2020
    Date of Patent: June 14, 2022
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takuji Okahisa, Yoshiyuki Yamamoto, Yoshiki Nishibayashi, Natsuo Tatsumi
  • Publication number: 20210230766
    Abstract: 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: Application
    Filed: April 12, 2021
    Publication date: July 29, 2021
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Hitoshi Sumiya
  • Patent number: 11007558
    Abstract: 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: Grant
    Filed: July 22, 2016
    Date of Patent: May 18, 2021
    Assignees: 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
  • Patent number: 11001938
    Abstract: 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: Grant
    Filed: August 10, 2015
    Date of Patent: May 11, 2021
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Hitoshi Sumiya
  • Publication number: 20210010131
    Abstract: 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: Application
    Filed: September 25, 2020
    Publication date: January 14, 2021
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takuji Okahisa, Yoshiyuki Yamamoto, Yoshiki Nishibayashi, Natsuo Tatsumi
  • Publication number: 20200361829
    Abstract: 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: Application
    Filed: August 13, 2018
    Publication date: November 19, 2020
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Yoshiki NISHIBAYASHI, Natsuo TATSUMI, Kensei HAMAKI
  • Publication number: 20200361778
    Abstract: 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: Application
    Filed: August 13, 2018
    Publication date: November 19, 2020
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Yoshiki NISHIBAYASHI, Natsuo TATSUMI, Kensei HAMAKI