Patents by Inventor Yoshikazu Yamagata

Yoshikazu Yamagata 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: 10553550
    Abstract: Disclosed is a semiconductor device having a radio frequency switch. Also disclosed are an antenna switch module and a method of manufacturing the semiconductor device. The semiconductor device includes a metal wiring insulating film bonded to a silicon substrate. In the semiconductor device, a crystal defect layer extends into the silicon substrate from a surface of the silicon substrate. Crystal defects are throughout the crystal defect layer. The semiconductor device and an integrated circuit are in the antenna switch module. The integrated circuit in the antenna switch module is mounted with the radio-frequency switch device and the silicon substrate. The method of manufacturing the semiconductor device includes a step of forming crystal defects throughout a silicon substrate. Radiation or a diffusion is used to form the crystal defects. After the step of forming the crystal defects, the method includes a step of implanting ions into a surface of the silicon substrate to form a crystal defect layer.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: February 4, 2020
    Assignee: Sony Corporation
    Inventors: Yoshikazu Motoyama, Hiroki Tsunemi, Hideo Yamagata
  • Publication number: 20200028404
    Abstract: An electric motor includes: a stator that has a stator core and has coils that are formed of an electric wire wound on the stator core and form a plurality of phases; a resin covering the stator; and a wire break facilitator that facilitates the electric wire to break at a time of abnormality. In the electric motor having the stator in which the coils are covered with molding resin, the wire break facilitator is attached to at least one of: a transition wire part between the coils wound on the stator core; a connection part at a neutral point; and a connection part of a lead wire.
    Type: Application
    Filed: January 26, 2018
    Publication date: January 23, 2020
    Inventors: YOSHIKAZU YAMAGATA, AKIHIKO WATANABE, TAKANORI AMAYA, IKUO OZAKI
  • Publication number: 20200006991
    Abstract: A molded motor of the present invention includes a rotor, a stator, a pair of shaft bearings, a pair of metal brackets, and a molding resin. The rotor has: a rotary shaft extending in a shaft direction; and a rotary body that has a permanent magnet and is fixed to the rotary shaft. The stator has: a stator core on which a plurality of salient poles are formed; and a plurality of coils each wound on each salient pole via an insulator, where the stator is covered by the molding resin and is disposed to face the rotor. The pair of metal brackets each fix each of the shaft bearings, and the shaft bearings rotatably support the rotor. Further, the rotary body has a dielectric layer formed between the rotary shaft and an outer peripheral surface of the rotary body. A metal member is provided, on an outer peripheral side of a coil end of the coil and on at least a part facing the coil end, in a circumferential direction.
    Type: Application
    Filed: February 26, 2018
    Publication date: January 2, 2020
    Inventors: YOSHIKAZU YAMAGATA, AKIHIKO WATANABE, TAKANORI AMAYA, YASUO NANBU, HISAAKI KATO, YASUNORI WAKAMORI, MASAYUKI TANIGUCHI
  • Publication number: 20190372421
    Abstract: A motor according to the present invention includes: a stator having a stator core and a coil; a rotor having a rotary shaft and a rotation body; a shaft bearing rotatably supporting the rotor; and a molding resin covering the stator. The motor has a coil end that is the coil protruding from the stator core in a shaft center X direction, and has a non-combustible layer provided to cover the coil end. The non-combustible layer is a metallic cover made of, for example, metal. The metallic cover is disposed to cover a periphery of a coil assembly in which the coil is formed on the stator core through an insulator. The metallic cover is integrated with the coil assembly by a molding resin.
    Type: Application
    Filed: November 22, 2017
    Publication date: December 5, 2019
    Inventors: TAKANORI AMAYA, AKIHIKO WATANABE, YOSHIKAZU YAMAGATA, YASUO NANBU, HISAAKI KATO, YASUNORI WAKAMORI
  • Patent number: 9647503
    Abstract: The present invention provides a rotary motor including at least a field magnet having field winding, and an armature having armature winding with an electrically insulating coating material applied thereto, and the coating material includes at least two layers of: a lower-layer coating material including a first low-viscosity resin liquid; and an upper-layer coating material including a second low-viscosity resin liquid with at least hollow glass beads and a thermoplastic resin added thereto. Thus, a rotary motor can be achieved which achieves a balance between an efficiency improvement and reliability.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: May 9, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Yoshikazu Yamagata
  • Publication number: 20150130300
    Abstract: The present invention provides a rotary motor including at least a field magnet having field winding, and an armature having armature winding with an electrically insulating coating material applied thereto, and the coating material includes at least two layers of; a lower-layer coating material including a first low-viscosity resin liquid; and an upper-layer coating material including a second low-viscosity resin liquid with at least hollow glass beads and a thermoplastic resin added thereto. Thus, a rotary motor can be achieved which achieves a balance between an efficiency improvement and reliability.
    Type: Application
    Filed: June 14, 2012
    Publication date: May 14, 2015
    Applicant: PANASONIC CORPORATION
    Inventor: Yoshikazu Yamagata
  • Patent number: 8242659
    Abstract: The mold commutator of the present invention comprises a plurality of commutator segments made of copper or copper alloy and circumferentially arranged, a plurality of spark absorbing elements, disposed between adjacent commutator segments, with paired parallel surfaces respectively having electrodes thereon, and a resin mold portion which integrates these portions into one piece. The spark absorbing element is electrically connected to the commutator segment via the electrode, and spark voltage generated at the commutator segment is absorbed by current flowing between the electrodes.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: August 14, 2012
    Assignee: Panasonic Corporation
    Inventors: Noriteru Maeda, Hirofumi Mizukami, Akihiko Yamazaki, Seiji Kurozumi, Yoshikazu Yamagata
  • Publication number: 20100141081
    Abstract: The mold commutator of the present invention comprises a plurality of commutator segments made of copper or copper alloy and circumferentially arranged, a plurality of spark absorbing elements, disposed between adjacent commutator segments, with paired parallel surfaces respectively having electrodes thereon, and a resin mold portion which integrates these portions into one piece. The spark absorbing element is electrically connected to the commutator segment via the electrode, and spark voltage generated at the commutator segment is absorbed by current flowing between the electrodes.
    Type: Application
    Filed: April 8, 2008
    Publication date: June 10, 2010
    Applicant: Panasonic Corporation
    Inventors: Noriteru Maeda, Hirofumi Mizukami, Akihiko Yamazaki, Seiji Kurozumi, Yoshikazu Yamagata
  • Patent number: 6673463
    Abstract: A structure material of the present invention consisting essentially of 20 parts by weight or more of a polymer mixture consisting essentially of of a thermoplastic aromatic polyester and a thermoplastic aliphatic polyester on the basis of 100 parts by weight of the structure material. The polymer mixture comprises 3 to 40 parts by weight of the aliphatic polyester on the basis of 100 parts by weight of the polymer mixture.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: January 6, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Onishi, Takahiko Terada, Yoshikazu Yamagata
  • Patent number: 6599450
    Abstract: A recycling method of producing magnetic material powder from bonded magnets which are produced by mixing magnetic material powder, as raw material powder, with a binder and subjecting a mixture to molding forming, has at least the steps of: (a) separating and collecting the magnetic material powder from the bonded magnets by removing all or a prescribed percentage of the binder contained in the magnets; (b) removing all or a prescribed percentage of the particles of diameter smaller than a prescribed particle diameter from the separated and collected magnetic material powder; and (c) mixing the magnetic material powder, from which the particles of diameter smaller than the prescribed one are removed, with a virgin magnetic material powder in a prescribed mixing ratio, so as to produce a new raw material powder.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: July 29, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takahiko Terada, Hiroshi Onishi, Yoshikazu Yamagata, Fumitoshi Yamashita
  • Patent number: 6533837
    Abstract: A method of recovering magnetic powder from rare earth bond magnet comprising a process of soaking the rare earth bond magnet in a decomposing solution, or holding it in a gas phase of the decomposing solution, containing at least one solvent selected from a group comprising tetralin, naphthalene, 1,4-hydroxynaphthalene, naphthol, biphenyl, 2-hexanone, acetonylacetone, phorone cyclohexanone and methlcyclohexanone, and heating at a temperature not lower than 230° C. A method of recycling recovered magnetic powder by substituting at least a part or all of magnetic powder in the molding compound of a second rare earth bond magnet. For preventing deterioration of magnetic powder from oxidation at surface, air in the decomposition vessel is substituted with nitrogen gas, helium gas and argon gas or is reduced to a pressure not higher than 10−2 Torr.
    Type: Grant
    Filed: October 3, 2000
    Date of Patent: March 18, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshikazu Yamagata, Fumitoshi Yamashita
  • Patent number: 6387294
    Abstract: A magnet having a maximum energy product at 20° C. of 18 MGOe or more, and an extremely excellent magnetic performance is obtained. A magnet stable in the magnetic performance in practical temperature range is obtained. A magnet having an excellent recycling performance is obtained. A magnet motor using such rare earth resin magnet generates a potent static magnetic field in the space with the armature core. The motor output is enhanced, and the current consumption is lowered. The rare earth resin magnet comprises at least one resin of thermoplastic resin and thermoplastic elastomer, pentaerythritol stearic acid triester, and rare earth magnetic powder. The rare earth magnetic powder, resin, and pentaerythritol stearic acid triester form a mutually mixed resin magnet composition, and this resin magnet composition has a predetermined shape. A magnet rotor has this rare earth resin magnet.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: May 14, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Fumitoshi Yamashita, Yoshikazu Yamagata, Hiromichi Fujimoto
  • Patent number: 6332998
    Abstract: A molding composition containing an unsaturated alkyd resin and an unsaturated polyester containing a crosslinking monomer, which may be 2-hydroxyethyl acrylate or 2-hydroxyethyl methacrylate. A molded part is manufactured by (a) covering the surrounding of a stator part having a heat generating coil with the molding composition, (b) feeding power to the coil for generating heat in the stator part, and (c) curing the molding composition by the heat generated in the stator part. The curing time is shortened, the molding cycle is improved, and, as a result, a molding composition excellent in productivity is presented, and by using this molding composition, molded parts are manufactured at excellent productivity.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: December 25, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshikazu Yamagata, Fumitoshi Yamashita, Hiroshi Onishi, Takahiko Terada
  • Patent number: 6235074
    Abstract: There is provided a process of recovering copper from winding composed of an enameled copper wire having a polyester and/or a polyurethane based insulating coating thereon, and the process includes the steps of immersing the winding into an alkali solution, removing alkali attaching to the winding, and melting the winding using high frequency heating.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: May 22, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Katsuhiro Murano, Fumitoshi Yamashita, Hiroshi Onishi, Yoshikazu Yamagata, Takahiko Terada
  • Patent number: 5969009
    Abstract: Disclosed is a molding material which can be easily decomposed by using an alkaline solution. This molding material comprises, as a binder, a thermosetting composition of an unsaturated polyester, an addition-polymerizable monomer and a low shrink agent, the addition-polymerizable monomer containing a monomer having an affinity for alkaline solution. As the addition-polymerizable monomer, there can be used a compound having an ethylene bond and a carbonyl or sulfonyl group, e.g. carboxylic and sulfonic acids, and metal salts, esters and acid anhydrides of these acids. There is also disclosed a molded motor comprising a molded part of an iron core, a winding and the above molding material, the molded part being integrally molded so as to coat at least one part of the iron core and winding with the molding material.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: October 19, 1999
    Assignee: Matsushita Electric Industrial Co, Ltd.
    Inventors: Takahiko Terada, Yoshikazu Yamagata, Hiroshi Onishi
  • Patent number: 5874482
    Abstract: A method for disposal of a thermosetting resin containing a material, at least part of which is affected by an alkaline aqueous solution, is disclosed. It comprises at least two steps of including a step of immersing the molded product in an alkaline aqueous solution and a subsequent step of immersing the molded product in water. This method does not require a high temperature as required in a thermal decomposition and does not generate any exhaust gas, and consumes only small energy.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: February 23, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshikazu Yamagata, Takahiko Terada, Hiroshi Onishi, Fumitoshi Yamashita
  • Patent number: 5846920
    Abstract: A cleaning agent for removing a residue of soldering flux, which essentially consists of mono-, di-, or tri-alkylene glycol mono branched C.sub.3 -C.sub.5 alkyl ether, which can remove with high safety both ionic residues and resinous materials contained in a soldering flux, which remain on the surface of a soldered electronic substrate. The cleaning agent of the present invention does not adversely affect the insulation and materials used in an electronic device.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: December 8, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toru Shiino, Kenichi Nobuta, Yoshikazu Yamagata, Tokihiko Shimizu
  • Patent number: 5830258
    Abstract: A method of recovering resources in a resin-molded electrical rotating device (1,2) in which electromagnetic members (1a,1b,2a) are molded with resin molding (1c,2c) with fine voids so as to be integrally made into a solid body, and a resin for molding of the rotating device (1,2). The method has the steps of disintegrating the resin molding (1c,2c) by chemically decomposing and/or eluting so as to remove the resin molding (1c,2c) from the electromagnetic members (1a,1b,2a) and separating and recovering at least metal components in the electromagnetic members (1a,1b,2a) as the resources.
    Type: Grant
    Filed: June 12, 1996
    Date of Patent: November 3, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Fumitoshi Yamashita, Seiji Kurozumi, Junko Kaneko, Akihiko Watanabe, Hiroshi Ohnishi, Takahiko Terada, Yoshikazu Yamagata
  • Patent number: 5574002
    Abstract: A cleaning agent composition is disclosed which is excellent in removing ability of the soldering flux, wax and machine oil, easy in waste water disposal, and free from the global environmental concern, allowing safe operation. The composition comprises: A) at least one member selected from the group consisting of propylene glycol monoalkyl ether having a C.sub.4-6 alkyl group and dipropylene glycol monoalkyl ether having a C.sub.3-6 alkyl group, B) at least one member selected from the group consisting of methanol, ethanol, 1-propanol and 2-propanol, and C) water.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: November 12, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tohru Shiino, Kenichi Nobuta, Yoshikazu Yamagata
  • Patent number: 5536982
    Abstract: The invention concerns an ultra thin polymer film electret comprising a polymer and a substrate having a surface electric charge, wherein a side chain of the polymer and the substrate are physically or chemically bonded. A method of manufacturing an ultra thin polymer film electret comprising: adsorbing a monomolecular film comprising a unsaturated group or a laminated film comprising the monomolecular film on to a substrate surface, irradiating the monomolecular film or the laminated film with an energy beam to polymerize the unsaturated groups and applying a high voltage to the film is also disclosed. Further, a method of manufacturing an ultra thin polymer film electret comprising: physically bonding a side chain of the polymer to a substrate surface to form a thin film and applying a high voltage to the thin film is also disclosed.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: July 16, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Norihisa Mino, Yoshikazu Yamagata, Kazufumi Ogawa