Patents by Inventor Hironobu Kubota

Hironobu Kubota 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: 11948714
    Abstract: A soft magnetic material for soft magnetic particles with a high filling rate. The soft magnetic material contains first soft magnetic particles and second soft magnetic particles with a larger average particle size than the first soft magnetic particles. The first soft magnetic particles have an average particle size in the range of 0.5 to 10 ?m, and the first soft magnetic particles have a nonpolar hydrocarbon group on their surfaces.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: April 2, 2024
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Yuya Ishida, Katsutoshi Uji, Hironobu Kubota, Tomoya Ooshima
  • Publication number: 20240040695
    Abstract: An electronic component that includes: an element body; and an insulating film covering an outer surface of the element body. The insulating film has a mix layer and a glass layer. The mix layer has a first glass and powder particles. The glass layer contains a second glass and has a smaller content percentage of the powder particles than the mix layer. The mix layer is on a side of the insulating film closer to the element body when viewed from the glass layer.
    Type: Application
    Filed: October 13, 2023
    Publication date: February 1, 2024
    Inventors: Tomoya OOSHIMA, Yuuta HOSHINO, Koichi YAMADA, Miki SASAKI, Hironobu KUBOTA
  • Publication number: 20240021346
    Abstract: An electronic component that includes: an element body; and an insulating film covering an outer surface of the element body. The element body has a crack that opens to the outer surface. In a cross section orthogonal to the outer surface, the crack has a first portion that extends from the opening and intersects an axis orthogonal to the outer surface. In addition, one portion of the insulating film penetrates into at least an inner space of the first portion of the crack.
    Type: Application
    Filed: September 27, 2023
    Publication date: January 18, 2024
    Inventors: Tomoya OOSHIMA, Yuuta HOSHINO, Koichi YAMADA, Miki SASAKI, Hironobu KUBOTA
  • Publication number: 20230378443
    Abstract: Provided is a secondary battery including an electrode including an electrode active material and another electrode-constituting material other than the electrode active material. In the secondary battery, at least a part of the electrode active material is covered with a covering material, and at least a part of the another electrode-constituting material is also covered with the covering material.
    Type: Application
    Filed: August 3, 2023
    Publication date: November 23, 2023
    Inventors: Takuya NAKASHIMA, Takeshi HAYASHI, Hironobu KUBOTA
  • Patent number: 11817244
    Abstract: An electronic component includes a body made of an insulator, a coating film covering the body, a conductor located in the body, and outer electrodes each of which is connected to the conductor. The insulator contains a magnetic metal powder. The coating film is composed of resin and cations of a metal which is a cationic element contained in the insulator and which has a standard electrode potential E0 of less than about 0 V.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: November 14, 2023
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Mitsunori Inoue, Hironobu Kubota
  • Publication number: 20230039573
    Abstract: Magnetic particles, each including a core made of a magnetic material, and an insulating coating film which covers a surface of the core made of a magnetic material. The insulating coating film is formed of a sol-gel reaction product of a mixture containing a metal alkoxide and an organic phosphoric acid or a salt thereof.
    Type: Application
    Filed: October 4, 2022
    Publication date: February 9, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Hironobu KUBOTA, Yuya ISHIDA
  • Publication number: 20220384793
    Abstract: A secondary battery includes a positive electrode for a secondary battery, a negative electrode, and an electrolytic solution. The positive electrode for a secondary battery includes a positive electrode active material for a secondary battery. The positive electrode active material for a secondary battery includes first particles and second particles. The first particles have a median diameter D50 of greater than or equal to 15 micrometers and less than or equal to 30 micrometers and each include a lithium-containing compound. The second particles have a median diameter D50 of greater than or equal to 1 micrometer and less than or equal to 10 micrometers and each include a center part that includes a lithium-containing compound and a covering part provided on a surface of the center part. The covering part includes, in order from a side closer to the center part, an underlayer and a surface layer.
    Type: Application
    Filed: July 28, 2022
    Publication date: December 1, 2022
    Inventors: Kazuaki ENDOH, Hironobu KUBOTA
  • Patent number: 11495387
    Abstract: Magnetic particles, each including a core made of a magnetic material, and an insulating coating film which covers a surface of the core made of a magnetic material. The insulating coating film is formed of a sol-gel reaction product of a mixture containing a metal alkoxide and an organic phosphoric acid or a salt thereof.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: November 8, 2022
    Assignee: Murata Manufacturing Co, , Ltd.
    Inventors: Hironobu Kubota, Yuya Ishida
  • Publication number: 20220246930
    Abstract: The present disclosure provides a negative electrode active material for a battery, exhibiting sufficiently excellent initial charge-discharge efficiency and cycle characteristics by suppressing physical deterioration of a film due to expansion and contraction of a core material. The negative electrode active material for a battery, comprising: a negative electrode active material core material; and a film provided on a surface of the negative electrode active material core material. The film includes an organic-inorganic hybrid film having a reactant. The reactant at least includes a first metal alkoxide including no metal atom-carbon atom bond in a molecule; and a second metal alkoxide including two or more of metal atom-carbon atom bonds in a molecule.
    Type: Application
    Filed: April 14, 2022
    Publication date: August 4, 2022
    Inventors: Hironobu KUBOTA, Yosuke KOIKE
  • Publication number: 20220246342
    Abstract: Magnetic particles, each including a core made of a metal magnetic material and a coating film which covers a surface of the core, in which the coating film contains a reaction product formed using a first metal alkoxide containing no metal atom-carbon atom bond in a molecule, and a second metal alkoxide containing two or more metal atom-carbon atom bonds in a molecule.
    Type: Application
    Filed: January 27, 2022
    Publication date: August 4, 2022
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Ryota SAISHO, Hironobu KUBOTA
  • Publication number: 20220158186
    Abstract: The present technology provides a positive electrode active material capable of more sufficiently preventing deterioration in cycle characteristics even when the positive electrode active material has a coating based on a metal alkoxide on its surface. The present technology relates to a positive electrode active material for a battery including a positive electrode active material core material and a coating formed on a surface of the positive electrode active material core material, wherein the coating is an organic-inorganic hybrid coating formed of a reactant including at least a first metal alkoxide containing no metal atom-carbon atom bond in one molecule and a second metal alkoxide containing two or more metal atom-carbon atom bonds in one molecule.
    Type: Application
    Filed: February 4, 2022
    Publication date: May 19, 2022
    Inventors: Hironobu KUBOTA, Kazuaki ENDOH, Takeshi HAYASHI, Takashi KASASHIMA
  • Patent number: 11276519
    Abstract: A coil component including an element assembly and a coil conductor embedded in the element assembly. The element assembly includes a first magnetic layer and a second magnetic layer that constitute a first principal surface and a second principal surface, respectively, where the first principal surface and the second principal surface are opposite to each other in the element assembly. The first magnetic layer has a higher relative magnetic permeability than the second magnetic layer. At least part of a winding portion of the coil conductor is located in the first magnetic layer. The first magnetic layer contains metal magnetic particles and a resin, and the second magnetic layer contains metal magnetic particles, a resin, and zinc oxide particles. The metal magnetic particles and the zinc oxide particles are dispersed in the resin.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: March 15, 2022
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Gota Shinohara, Noriko Shimizu, Keiichi Ishida, Hironobu Kubota, Mari Yonemura, Takao Kawachi
  • Patent number: 11120934
    Abstract: An electronic component includes a main body made from a metal magnetic powder and an insulating resin, a coating film covering the surface of the main body, a conductor disposed inside the main body, inorganic particles adhering to the surface of the coating film, and outer electrodes which are electrically connected to the conductor and which cover portions of the surface of the coating film while inorganic particles adhere to the portions, wherein the coating film contains a resin and metal cations.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: September 14, 2021
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hironobu Kubota, Mitsunori Inoue
  • Publication number: 20210253899
    Abstract: A coating process includes adding a body to a reactor; adding a metal alkoxide or precursors thereof to the reactor; adding a catalyst for the hydrolysis of the metal alkoxide to the reactor; and coating the surface of the body with a metal oxide-containing coating layer through the hydrolysis and dehydration condensation of the metal alkoxide. The addition of a body precedes at least one of the addition of a metal alkoxide or precursors thereof and the addition of a catalyst.
    Type: Application
    Filed: February 10, 2021
    Publication date: August 19, 2021
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Hironobu KUBOTA, Tomoya OOSHIMA, Yuuta HOSHINO
  • Publication number: 20210183548
    Abstract: A soft magnetic material for soft magnetic particles with a high filling rate. The soft magnetic material contains first soft magnetic particles and second soft magnetic particles with a larger average particle size than the first soft magnetic particles. The first soft magnetic particles have an average particle size in the range of 0.5 to 10 ?m, and the first soft magnetic particles have a nonpolar hydrocarbon group on their surfaces.
    Type: Application
    Filed: December 11, 2020
    Publication date: June 17, 2021
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Yuya ISHIDA, Katsutoshi UJI, Hironobu KUBOTA, Tomoya OOSHIMA
  • Publication number: 20210101210
    Abstract: An electronic component includes a body made of an insulator, a coating film covering the body, a conductor located in the body, and outer electrodes each of which is connected to the conductor. The insulator contains a magnetic metal powder. The coating film is composed of resin and cations of a metal which is a cationic element contained in the insulator and which has a standard electrode potential E0 of less than about 0 V.
    Type: Application
    Filed: November 23, 2020
    Publication date: April 8, 2021
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Mitsunori INOUE, Hironobu KUBOTA
  • Patent number: 10875095
    Abstract: An electronic component includes a body made of an insulator, a coating film covering the body, a conductor located in the body, and outer electrodes each of which is connected to the conductor. The insulator contains a magnetic metal powder. The coating film is composed of resin and cations of a metal which is a cationic element contained in the insulator and which has a standard electrode potential E0 of less than about 0 V.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: December 29, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Mitsunori Inoue, Hironobu Kubota
  • Patent number: 10650955
    Abstract: An electronic component includes a main body composed of an insulator, a coating film covering the main body, a circuit element located inside the main body, and outer electrodes. The insulator contains a metal magnetic powder. The coating film is composed of a resin and a cationic element contained in the insulator.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: May 12, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hironobu Kubota, Mitsunori Inoue, Tomohiko Mori, Gota Shinohara, Kenji Nishiyama
  • Patent number: 10553343
    Abstract: An electronic component includes a main body composed of an insulator, a coating film covering the main body, a circuit element located inside the main body, and outer electrodes. The insulator contains a metal magnetic powder. The coating film is composed of a resin and a cationic element contained in the insulator.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: February 4, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hironobu Kubota, Mitsunori Inoue, Tomohiko Mori, Gota Shinohara, Kenji Nishiyama
  • Publication number: 20190371507
    Abstract: An electronic component includes a main body made from a metal magnetic powder and an insulating resin, a coating film covering the surface of the main body, a conductor disposed inside the main body, inorganic particles adhering to the surface of the coating film, and outer electrodes which are electrically connected to the conductor and which cover portions of the surface of the coating film while inorganic particles adhere to the portions, wherein the coating film contains a resin and metal cations.
    Type: Application
    Filed: August 13, 2019
    Publication date: December 5, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Hironobu KUBOTA, Mitsunori INOUE