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).
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Patent number: 11948714Abstract: 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: GrantFiled: December 11, 2020Date of Patent: April 2, 2024Assignee: Murata Manufacturing Co., Ltd.Inventors: Yuya Ishida, Katsutoshi Uji, Hironobu Kubota, Tomoya Ooshima
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Publication number: 20240040695Abstract: 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: ApplicationFiled: October 13, 2023Publication date: February 1, 2024Inventors: Tomoya OOSHIMA, Yuuta HOSHINO, Koichi YAMADA, Miki SASAKI, Hironobu KUBOTA
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Publication number: 20240021346Abstract: 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: ApplicationFiled: September 27, 2023Publication date: January 18, 2024Inventors: Tomoya OOSHIMA, Yuuta HOSHINO, Koichi YAMADA, Miki SASAKI, Hironobu KUBOTA
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Publication number: 20230378443Abstract: 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: ApplicationFiled: August 3, 2023Publication date: November 23, 2023Inventors: Takuya NAKASHIMA, Takeshi HAYASHI, Hironobu KUBOTA
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Patent number: 11817244Abstract: 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: GrantFiled: November 23, 2020Date of Patent: November 14, 2023Assignee: Murata Manufacturing Co., Ltd.Inventors: Mitsunori Inoue, Hironobu Kubota
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Publication number: 20230039573Abstract: 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: ApplicationFiled: October 4, 2022Publication date: February 9, 2023Applicant: Murata Manufacturing Co., Ltd.Inventors: Hironobu KUBOTA, Yuya ISHIDA
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Publication number: 20220384793Abstract: 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: ApplicationFiled: July 28, 2022Publication date: December 1, 2022Inventors: Kazuaki ENDOH, Hironobu KUBOTA
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Patent number: 11495387Abstract: 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: GrantFiled: July 8, 2019Date of Patent: November 8, 2022Assignee: Murata Manufacturing Co, , Ltd.Inventors: Hironobu Kubota, Yuya Ishida
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Publication number: 20220246930Abstract: 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: ApplicationFiled: April 14, 2022Publication date: August 4, 2022Inventors: Hironobu KUBOTA, Yosuke KOIKE
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Publication number: 20220246342Abstract: 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: ApplicationFiled: January 27, 2022Publication date: August 4, 2022Applicant: Murata Manufacturing Co., Ltd.Inventors: Ryota SAISHO, Hironobu KUBOTA
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Publication number: 20220158186Abstract: 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: ApplicationFiled: February 4, 2022Publication date: May 19, 2022Inventors: Hironobu KUBOTA, Kazuaki ENDOH, Takeshi HAYASHI, Takashi KASASHIMA
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Patent number: 11276519Abstract: 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: GrantFiled: November 5, 2018Date of Patent: March 15, 2022Assignee: Murata Manufacturing Co., Ltd.Inventors: Gota Shinohara, Noriko Shimizu, Keiichi Ishida, Hironobu Kubota, Mari Yonemura, Takao Kawachi
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Patent number: 11120934Abstract: 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: GrantFiled: August 13, 2019Date of Patent: September 14, 2021Assignee: Murata Manufacturing Co., Ltd.Inventors: Hironobu Kubota, Mitsunori Inoue
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Publication number: 20210253899Abstract: 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: ApplicationFiled: February 10, 2021Publication date: August 19, 2021Applicant: Murata Manufacturing Co., Ltd.Inventors: Hironobu KUBOTA, Tomoya OOSHIMA, Yuuta HOSHINO
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Publication number: 20210183548Abstract: 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: ApplicationFiled: December 11, 2020Publication date: June 17, 2021Applicant: Murata Manufacturing Co., Ltd.Inventors: Yuya ISHIDA, Katsutoshi UJI, Hironobu KUBOTA, Tomoya OOSHIMA
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Publication number: 20210101210Abstract: 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: ApplicationFiled: November 23, 2020Publication date: April 8, 2021Applicant: Murata Manufacturing Co., Ltd.Inventors: Mitsunori INOUE, Hironobu KUBOTA
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Patent number: 10875095Abstract: 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: GrantFiled: March 15, 2016Date of Patent: December 29, 2020Assignee: Murata Manufacturing Co., Ltd.Inventors: Mitsunori Inoue, Hironobu Kubota
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Patent number: 10650955Abstract: 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: GrantFiled: July 10, 2018Date of Patent: May 12, 2020Assignee: Murata Manufacturing Co., Ltd.Inventors: Hironobu Kubota, Mitsunori Inoue, Tomohiko Mori, Gota Shinohara, Kenji Nishiyama
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Patent number: 10553343Abstract: 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: GrantFiled: December 1, 2016Date of Patent: February 4, 2020Assignee: Murata Manufacturing Co., Ltd.Inventors: Hironobu Kubota, Mitsunori Inoue, Tomohiko Mori, Gota Shinohara, Kenji Nishiyama
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Publication number: 20190371507Abstract: 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: ApplicationFiled: August 13, 2019Publication date: December 5, 2019Applicant: Murata Manufacturing Co., Ltd.Inventors: Hironobu KUBOTA, Mitsunori INOUE