Patents by Inventor Akio Igarashi

Akio Igarashi 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).

  • Publication number: 20200258677
    Abstract: Advantage is taken of the fact that tin has a higher efficiency of absorption of a laser beam than, for example, copper. A method of manufacturing a coil component includes preparing a wire that includes a linear, central conductor and an insulating coating that covers a circumferential surface of the central conductor, preparing a metal terminal that is to be electrically connected to the central conductor at an end portion of the wire and that has a surface on which a tin-containing film that contains tin is disposed and above which at least the end portion of the wire is to be disposed, and welding the central conductor of the wire to the metal terminal by irradiating at least the tin-containing film with a laser beam with the end portion of the wire disposed along the tin-containing film.
    Type: Application
    Filed: February 5, 2020
    Publication date: August 13, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Akio IGARASHI, Yuuji IGARASHI, Koji ONISHI, Takuya ISHIDA, Takao MIYAMOTO
  • Publication number: 20200258678
    Abstract: An adhesive layer is in contact with a rising portion of a metal terminal and an outer end surface of a flange portion of a drum-shaped core. A surface of the rising portion that faces the outer end surface is an inclined surface that inclines with respect to the outer end surface. The thickest portion of the adhesive layer is located near a position at which a distance between the inclined surface and the outer end surface is largest. The thickness of the thickest portion of the adhesive layer is 13 ?m or more.
    Type: Application
    Filed: February 6, 2020
    Publication date: August 13, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Akio IGARASHI, Yuuji IGARASHI, Takao MIYAMOTO, Takuya ISHIDA, Koji ONISHI
  • Publication number: 20200243250
    Abstract: A coil component includes first and second wires wound around a winding core portion of a core, and third and fourth wires wound around outside a portion of the first and the second wires wound around the winding core portion in an opposite direction to a winding direction of the first and second wires. The portion of the first and second wires wound around the winding core portion has a first twisted wire portion twisted together. A length of the first wire or a length of the second wire of the portion of the first and second wires wound around the winding core portion is configured to be equal to a length of the third wire or a length of the fourth wire of the portion of the third and fourth wires wound around outside the portion of the first and second wires wound around the winding core portion.
    Type: Application
    Filed: December 19, 2019
    Publication date: July 30, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Akio IGARASHI
  • Publication number: 20200243249
    Abstract: A coil component includes a core including a winding core portion, a first wire, a second wire, a third wire, and a fourth wire that are wound around the winding core portion. A winding portion is formed by winding the respective first to fourth wires around the winding core portion. The winding portion includes a twisted wire portion in which the first wire, the second wire, the third wire, and the fourth wire are collectively twisted.
    Type: Application
    Filed: December 19, 2019
    Publication date: July 30, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Akio IGARASHI
  • Patent number: 10720273
    Abstract: A coil component includes a wire including a linear central conductor and an insulating coating layer that covers a circumferential surface of the central conductor, and a terminal electrode that is electrically connected to the central conductor at an end portion of the wire. The terminal electrode includes a receiving portion to which the central conductor is welded. A weld nugget portion that is produced when the central conductor is welded and the receiving portion are welded to each other.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: July 21, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Akio Igarashi, Koji Onishi, Takashi Murakami
  • Patent number: 10600559
    Abstract: A terminal electrode is secured to a flange portion with an adhesive and includes a base disposed on an outer surface of the flange portion and a mounting portion disposed above a bottom surface of the flange portion and extending from a bent portion extending from the base and covering a ridge line along which the outer surface and the bottom surface meet. The mounting portion is not secured to the flange portion.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: March 24, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Akio Igarashi, Takashi Murakami, Koji Onishi
  • Publication number: 20200066435
    Abstract: A coil component includes a drum-shaped core that includes a flange portion, a metal terminal that is mounted on the flange portion and that is formed from a metal plate, and an adhesive layer that contacts both a rising portion of the metal terminal and a rising surface of the flange portion. The adhesive layer includes a thick-walled portion and a thin-walled portion having different thicknesses.
    Type: Application
    Filed: August 9, 2019
    Publication date: February 27, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Akio Igarashi, Yuuji Igarashi, Takao Miyamoto
  • Publication number: 20190392973
    Abstract: A coil component includes a first alignment winding region in which a second wire is continuously wound so as to have turns such that the turns of the second wire are aligned with turns of a first wire having the same ordinal number outside the first wire in a direction perpendicular to a central axis. The ordinal number is counted from the turn nearest to the first flange portion.
    Type: Application
    Filed: June 11, 2019
    Publication date: December 26, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Ryota HASHIMOTO, Masashi MIYAMOTO, Akio IGARASHI
  • Patent number: 10501333
    Abstract: The present invention provides a spherical ferrite powder that is excellent in filling ability and moldability if used as a filler, is excellent in handling ability, and is high in resistivity; a resin compound including the ferrite powder; and a molded product made of the resin compound. The spherical ferrite powder including 15 to 30 wt % of ferrite particles having the particle diameter less than 11 ?m and have the volume average particle diameter of 10 to 50 ?m; the resin compound including the ferrite powder; and the molded product made of the resin compound are employed.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: December 10, 2019
    Assignees: POWDERTECH CO., LTD., TATSUTA ELECTRIC WIRE & CABLE CO., LTD.
    Inventors: Koji Aga, Tetsuya Igarashi, Akio Takahashi
  • Patent number: 10468177
    Abstract: A coil component includes a drum-shaped core including a winding core portion and first and second flange portions. A base of a terminal electrode disposed on the first flange portion and a base of an other terminal electrode disposed on the first flange portion are adjacent to each other in the direction in which first and second side surfaces oppose each other, and are along a flat surface of an outer end surface. A clearance between the base of the terminal electrode and the base of the other terminal electrode on a side near a lower surface is larger than that on a side near an upper surface.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: November 5, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Akio Igarashi, Kentaro Yamaguchi
  • Patent number: 10454235
    Abstract: A metal terminal where a connecting portion has a receiving portion which receives a wire and a contact segment which extends from the receiving portion by way of a bending scheduled portion is prepared. By applying heat and pressure in a state where the wire is placed on the receiving portion for temporarily fixing the wire, the wire is adhered to the receiving portion using a molten or softened insulating resin coating as an adhesive agent. Next, the connecting portion is bent by way of the bending scheduled portion such that the contact segment faces the receiving portion by way of the wire and the contact segment is brought into contact with the wire. Next, by irradiating a laser beam to a portion of the metal terminal, the wire and the metal terminal are welded to each other.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: October 22, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takashi Murakami, Akio Igarashi, Koji Onishi
  • Publication number: 20190287715
    Abstract: A coil component includes a blocking material that contains a resin and that blocks a route that leads to a gap between turns of a wire from an outside at portions of the wire that are in close contact with each other between adjoining turns.
    Type: Application
    Filed: March 4, 2019
    Publication date: September 19, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Akio IGARASHI, Yuuji IGARASHI
  • Publication number: 20190287710
    Abstract: In a coil component, a plate-shaped core is fixed to first and second flanges of a drum-shaped core with an adhesive interposed therebetween in a state that a lower principal surface of the plate-shaped core faces top surfaces of the first and second flanges. The adhesive is made of a hardened epoxy-based resin containing dicyandiamide.
    Type: Application
    Filed: March 4, 2019
    Publication date: September 19, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Akio IGARASHI, Yuuji IGARASHI
  • Publication number: 20190279815
    Abstract: A method of manufacturing a coil component includes a heating step of locally heating metal terminals while the metal terminals are supported by a pressing member having a contact surface capable of coming into contact with the metal terminals in a state where an adhesive is disposed between the metal terminals and a drum core.
    Type: Application
    Filed: March 4, 2019
    Publication date: September 12, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Takashi MURAKAMI, Akio IGARASHI, Takao MIYAMOTO, Kazuo MIYAKE
  • Patent number: 10388453
    Abstract: A coil component including a wire has a central conductor and an insulating coating layer, and a terminal electrode has a connection part that is electrically connected to the central conductor. The connection part includes a receiving part that receives an end portion of the wire, and a welding part that extends from the receiving part via a fold-back part so as to face the receiving part. The wire becomes sandwiched between the receiving part and the welding part. The central conductor is welded to the welding part in the portion from which the insulating coating layer is removed. The distal end portion of the wire protrudes from the space between the receiving part and the welding part, with the insulating coating layer remaining on the distal end portion.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: August 20, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Akio Igarashi, Koji Onishi, Takashi Murakami
  • Publication number: 20190244744
    Abstract: A coil component includes a drum core that includes a winding core portion and a pair of flange portions formed at the ends of the winding core portion, electrodes that are included in the pair of flange portions, and first and second wires that are wound around the winding core portion and that include extended portions electrically connected to the electrodes. The flange portions are continuous with the winding core portion and have slopes that guide the extended portions to the electrodes.
    Type: Application
    Filed: January 31, 2019
    Publication date: August 8, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Kazuhiko TAKENAKA, Shigeto YAMAMOTO, Ryota HASHIMOTO, Akio IGARASHI, Yuki KANBE
  • Publication number: 20190244748
    Abstract: A flange portion includes a projecting surface that is positioned in a leading end of a projection projecting toward a mounting substrate and that faces the mounting substrate, and a principal surface that extends in a direction crossing the projecting surface and that faces a direction in which the pair of flange portions are aligned. A metal terminal includes a mounting portion opposed to the projecting surface and an end surface portion opposed to the principal surface. An angle ? between the mounting portion and the end surface portion satisfies the relationship 85 degrees??<90 degrees. The angle ? between the mounting portion and the end surface portion is smaller than an angle ?1 between the projecting surface and the principal surface.
    Type: Application
    Filed: January 31, 2019
    Publication date: August 8, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Akio IGARASHI, Kazuhiko TAKENAKA, Shigeto YAMAMOTO, Ryota HASHIMOTO, Yuki KANBE
  • Publication number: 20190156990
    Abstract: A coil component includes a drum core including a winding core portion and a flange portion disposed on an end portion thereof the winding core portion in its axial direction, a planar core having a lower principal surface, and a wire wound around the winding core portion. The flange portion includes an inner end surface, an outer end surface, a bottom surface, and a top surface. The inner end surface positions the end portion of the winding core portion. The bottom surface links the inner end surface and the outer end surface and placed so as to face a mounting substrate side when being mounted. The lower principal surface of the planar core is fixed to the top surface with an adhesive interposed therebetween. The top surface includes a protrusion with a vertex positioned closer to the inner end surface than to the outer end surface.
    Type: Application
    Filed: October 24, 2018
    Publication date: May 23, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Akio IGARASHI, Yuuji IGARASHI, Kenji HASHIMOTO
  • Patent number: 10262787
    Abstract: A coil component includes a conducting wire and a terminal electrode. The terminal electrode includes a first terminal piece and a second terminal piece that face and overlap each other with the conducting wire interposed therebetween. The first terminal piece and the second terminal piece are coupled to one another with a coupling portion and are integrated in a welded ball at a position different from a position of the coupling portion. An end portion of the conducting wire is in the welded ball.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: April 16, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Akio Igarashi, Koji Onishi
  • Patent number: 10192668
    Abstract: In the coil component, for dimensions measured along a predetermined direction of a winding core portion, a dimension of each of top surfaces of first and second flange portions is equal to or larger than a dimension of the winding core portion.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: January 29, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Akio Igarashi