Patents by Inventor Masashi Hayashiguchi

Masashi Hayashiguchi 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: 11967545
    Abstract: A semiconductor device includes a semiconductor element, a first terminal, a second terminal, a first conductor, a first connecting member, and a second connecting member. The semiconductor element includes a first electrode, a second electrode, and a third electrode, and is configured to perform on/off control between the first electrode and the second electrode based on a drive signal inputted to the third electrode. The first terminal and the second terminal are separated apart from each other and electrically connected to the first electrode. The first conductor is electrically connected to the first terminal. The first connecting member electrically connects the first electrode and the first conductor. The second connecting member electrically connects the first conductor and the second terminal.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: April 23, 2024
    Assignee: ROHM CO., LTD.
    Inventor: Masashi Hayashiguchi
  • Patent number: 11936369
    Abstract: A switching device 1 includes a SiC semiconductor chip 11 which has a gate pad 14, a source pad 13 and a drain pad 12 and in which on-off control is performed between the source and the drain by applying a drive voltage between the gate and the source in a state where a potential difference is applied between the source and the drain, a sense source terminal 4 electrically connected to the source pad 13 for applying the drive voltage, and an external resistance (source wire 16) that is interposed in a current path between the sense source terminal 4 and the source pad 13, is separated from sense source terminal 4, and has a predetermined size.
    Type: Grant
    Filed: April 25, 2023
    Date of Patent: March 19, 2024
    Assignee: ROHM CO., LTD.
    Inventors: Masashi Hayashiguchi, Kazuhide Ino
  • Patent number: 11923278
    Abstract: A semiconductor module includes a semiconductor device and bus bar. The device includes an insulating substrate, conductive member, switching elements, and first/second input terminals. The substrate has main/back surfaces opposite in a thickness direction, with the conductive member disposed on the main surface. The switching elements are connected to the conductive member. The first input terminal, including a first terminal portion, is connected to the conductive member. The second input terminal, including a second terminal portion overlapping with the first terminal portion in the thickness direction, is connected to the switching elements. The second input terminal is separate from the first input terminal and conductive member in the thickness direction. The bus bar includes first/second terminals. The second terminal, separate from the first terminal in the thickness direction, partially overlaps with the first terminal in the thickness direction.
    Type: Grant
    Filed: April 18, 2023
    Date of Patent: March 5, 2024
    Assignee: ROHM CO., LTD.
    Inventors: Masashi Hayashiguchi, Takumi Kanda
  • Patent number: 11909329
    Abstract: A semiconductor unit includes a semiconductor device, a controller, and a resistor. The semiconductor device includes a transistor arranged between a positive electrode of a battery and an inverter circuit electrically connected to the battery. The controller is connected to a control terminal of the transistor and configured to control the transistor. The resistor arranged between the control terminal and the controller. The controller controls the transistor so that when a current flowing to the transistor is greater than or equal to a threshold value, the transistor is deactivated. The resistor has a resistance value that is greater than or equal to 100 ?.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: February 20, 2024
    Assignee: ROHM CO., LTD.
    Inventors: Mineo Miura, Masashi Hayashiguchi, Jun Terada
  • Patent number: 11901340
    Abstract: A semiconductor power module including an insulating substrate having one surface and another surface, an output side terminal arranged at a one surface side of the insulating substrate, a first power supply terminal arranged at the one surface side of the insulating substrate, a second power supply terminal to which a voltage of a magnitude different from a voltage applied to the first power supply terminal is to be applied, and arranged at an other surface side of the insulating substrate so as to face the first power supply terminal across the insulating substrate, a first switching device arranged at the one surface side of the insulating substrate and electrically connected to the output side terminal and the first power supply terminal, and a second switching device arranged at the one surface side of the insulating substrate and electrically connected to the output side terminal and the second power supply terminal.
    Type: Grant
    Filed: February 6, 2023
    Date of Patent: February 13, 2024
    Assignee: ROHM CO., LTD.
    Inventors: Kenji Hayashi, Masashi Hayashiguchi
  • Publication number: 20240007097
    Abstract: A semiconductor device includes a switching circuit that switches between conducting state and disconnected state. The switching circuit includes first and second switching elements electrically connected in parallel. The first switching element is an IGBT, and the second switching element is a MOSFET. When a current flowing in the switching circuit is less than a first current value, the second switching element has a lower voltage than the first switching element. When the current flowing in the switching circuit is not less than a second current value and not greater than a third current value, the threshold voltage of the second switching element ranges from ?1.0 V to +0.4 V relative to the threshold voltage of the first switching element. The third current value is not greater than the rated current of the switching circuit. The first current value is less than the third current value.
    Type: Application
    Filed: September 18, 2023
    Publication date: January 4, 2024
    Inventors: Kenichi ONODERA, Masashi HAYASHIGUCHI
  • Publication number: 20240006402
    Abstract: A semiconductor device includes a first MOSFET and a first IGBT. A drain of the first MOSFET and a collector of the first IGBT are electrically connected to each other. A source of the first MOSFET and an emitter of the first IGBT are electrically connected to each other. An element withstand voltage of the first MOSFET is larger than an element withstand voltage of the first IGBT.
    Type: Application
    Filed: September 13, 2023
    Publication date: January 4, 2024
    Inventor: Masashi HAYASHIGUCHI
  • Patent number: 11850953
    Abstract: In a drive unit, a motor and an inverter having power modules are disposed adjacent in an axial direction of the motor. In the motor, first and second coil groups, each including one U-phase coil, one V-phase coil, and one W-phase coil, are provided. The power modules constitute first and second power module groups that are connected in parallel. The first and second power module groups each include one U-phase power module, one V-phase power module, and one W-phase power module. A distance between the U-phase power module of the first power module group and the U-phase coil of the first coil group, a distance between the V-phase power module of the first power module group and the V-phase coil of the first coil group, and a distance between the W-phase power module of the first power module group and the W-phase coil of the first coil group are equal.
    Type: Grant
    Filed: October 20, 2022
    Date of Patent: December 26, 2023
    Assignees: MAZDA MOTOR CORPORATION, ROHM CO., LTD
    Inventors: Takayuki Sato, Masashi Hayashiguchi
  • Publication number: 20230378038
    Abstract: A semiconductor device includes a plurality of semiconductor elements, each of which has a first electrode, a second electrode, and a third electrode, and is subjected to an ON-OFF control between the first electrode and the second electrode in accordance with a driving signal input to the third electrode. Further, the semiconductor device includes a control terminal to which the driving signal is input, a first wiring portion to which the control terminal is connected, a second wiring portion separated from the first wiring portion, a first connection member to conduct the first wiring portion and the second wiring portion, and a second connection member to conduct the second wiring portion and the third electrode of one of the plurality of semiconductor elements. The respective first electrodes of the plurality of semiconductor elements are electrically connected to one another, and respective second electrodes of the plurality of semiconductor elements are electrically connected to one another.
    Type: Application
    Filed: December 16, 2021
    Publication date: November 23, 2023
    Inventor: Masashi HAYASHIGUCHI
  • Publication number: 20230344427
    Abstract: A semiconductor device includes a first terminal for a battery, a second terminal for an inverter circuit, and a transistor. The semiconductor device is configured to control a voltage applied to a control terminal of the transistor to allow supply of a current from the first terminal to the second terminal and allow supply of a current from the second terminal to the first terminal. A withstand voltage between the first terminal and the second terminal is greater than or equal to a voltage between the battery and the inverter circuit.
    Type: Application
    Filed: June 27, 2023
    Publication date: October 26, 2023
    Inventors: Mineo MIURA, Masashi HAYASHIGUCHI, Jun TERADA
  • Patent number: 11784639
    Abstract: A semiconductor device includes a first terminal for a battery, a second terminal for an inverter circuit, and a transistor. The semiconductor device is configured to control a voltage applied to a control terminal of the transistor to allow supply of a current from the first terminal to the second terminal and allow supply of a current from the second terminal to the first terminal. A withstand voltage between the first terminal and the second terminal is greater than or equal to a voltage between the battery and the inverter circuit.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: October 10, 2023
    Assignee: ROHM CO., LTD.
    Inventors: Mineo Miura, Masashi Hayashiguchi, Jun Terada
  • Publication number: 20230275009
    Abstract: A semiconductor module includes a semiconductor device and bus bar. The device includes an insulating substrate, conductive member, switching elements, and first/second input terminals. The substrate has main/back surfaces opposite in a thickness direction, with the conductive member disposed on the main surface. The switching elements are connected to the conductive member. The first input terminal, including a first terminal portion, is connected to the conductive member. The second input terminal, including a second terminal portion overlapping with the first terminal portion in the thickness direction, is connected to the switching elements. The second input terminal is separate from the first input terminal and conductive member in the thickness direction. The bus bar includes first/second terminals. The second terminal, separate from the first terminal in the thickness direction, partially overlaps with the first terminal in the thickness direction.
    Type: Application
    Filed: April 18, 2023
    Publication date: August 31, 2023
    Inventors: Masashi HAYASHIGUCHI, Takumi KANDA
  • Publication number: 20230268914
    Abstract: A switching device 1 includes a SiC semiconductor chip 11 which has a gate pad 14, a source pad 13 and a drain pad 12 and in which on-off control is performed between the source and the drain by applying a drive voltage between the gate and the source in a state where a potential difference is applied between the source and the drain, a sense source terminal 4 electrically connected to the source pad 13 for applying the drive voltage, and an external resistance (source wire 16) that is interposed in a current path between the sense source terminal 4 and the source pad 13, is separated from sense source terminal 4, and has a predetermined size.
    Type: Application
    Filed: April 25, 2023
    Publication date: August 24, 2023
    Inventors: Masashi HAYASHIGUCHI, Kazuhide INO
  • Publication number: 20230268915
    Abstract: A switching device 1 includes a SiC semiconductor chip 11 which has a gate pad 14, a source pad 13 and a drain pad 12 and in which on-off control is performed between the source and the drain by applying a drive voltage between the gate and the source in a state where a potential difference is applied between the source and the drain, a sense source terminal 4 electrically connected to the source pad 13 for applying the drive voltage, and an external resistance (source wire 16) that is interposed in a current path between the sense source terminal 4 and the source pad 13, is separated from sense source terminal 4, and has a predetermined size.
    Type: Application
    Filed: April 25, 2023
    Publication date: August 24, 2023
    Inventors: Masashi HAYASHIGUCHI, Kazuhide INO
  • Publication number: 20230261647
    Abstract: A switching device 1 includes a SiC semiconductor chip 11 which has a gate pad 14, a source pad 13 and a drain pad 12 and in which on-off control is performed between the source and the drain by applying a drive voltage between the gate and the source in a state where a potential difference is applied between the source and the drain, a sense source terminal 4 electrically connected to the source pad 13 for applying the drive voltage, and an external resistance (source wire 16) that is interposed in a current path between the sense source terminal 4 and the source pad 13, is separated from sense source terminal 4, and has a predetermined size.
    Type: Application
    Filed: April 25, 2023
    Publication date: August 17, 2023
    Inventors: Masashi HAYASHIGUCHI, Kazuhide INO
  • Patent number: 11728801
    Abstract: A switching device 1 includes a SiC semiconductor chip 11 which has a gate pad 14, a source pad 13 and a drain pad 12 and in which on-off control is performed between the source and the drain by applying a drive voltage between the gate and the source in a state where a potential difference is applied between the source and the drain, a sense source terminal 4 electrically connected to the source pad 13 for applying the drive voltage, and an external resistance (source wire 16) that is interposed in a current path between the sense source terminal 4 and the source pad 13, is separated from sense source terminal 4, and has a predetermined size.
    Type: Grant
    Filed: April 18, 2022
    Date of Patent: August 15, 2023
    Assignee: ROHM CO., LTD.
    Inventors: Masashi Hayashiguchi, Kazuhide Ino
  • Publication number: 20230246001
    Abstract: A semiconductor device includes: a plurality of semiconductor elements connected in parallel; a rectifier element connected in anti-parallel to the plurality of semiconductor elements; a power terminal electrically connected to the plurality of semiconductor elements; and an electrical conductor electrically connected to the power terminal and the plurality of semiconductor elements and including a pad portion to which the plurality of semiconductor elements are bonded. The plurality of first semiconductor elements include a first element and a second element. The minimum conduction path of the first element to the power terminal is shorter than the minimum conduction path of the second element to the power terminal. The pad portion includes a first section to which the first element is bonded and a second section to which the second element is bonded. The rectifier element is located in the first section of the pad portion.
    Type: Application
    Filed: September 9, 2021
    Publication date: August 3, 2023
    Inventors: Masashi HAYASHIGUCHI, Kenichi ONODERA
  • Publication number: 20230187416
    Abstract: A semiconductor power module including an insulating substrate having one surface and another surface, an output side terminal arranged at a one surface side of the insulating substrate, a first power supply terminal arranged at the one surface side of the insulating substrate, a second power supply terminal to which a voltage of a magnitude different from a voltage applied to the first power supply terminal is to be applied, and arranged at an other surface side of the insulating substrate so as to face the first power supply terminal across the insulating substrate, a first switching device arranged at the one surface side of the insulating substrate and electrically connected to the output side terminal and the first power supply terminal, and a second switching device arranged at the one surface side of the insulating substrate and electrically connected to the output side terminal and the second power supply terminal.
    Type: Application
    Filed: February 6, 2023
    Publication date: June 15, 2023
    Inventors: Kenji HAYASHI, Masashi HAYASHIGUCHI
  • Publication number: 20230179111
    Abstract: In an inverter that includes a smoothing capacitor and a plurality of power modules, the smoothing capacitor includes a plurality of columnar unit capacitors each having electrodes at both ends thereof, a one-end-side bus plate connected to the electrode at one end of each unit capacitor, and an other-end-side bus plate connected to the electrode at the other end of the unit capacitor. The unit capacitors are arranged, with axes thereof parallel to each other, side by side in a direction perpendicular to the axes. The power modules are arranged at positions equally distant from a center of the inverter and equally distant from the smoothing capacitor.
    Type: Application
    Filed: October 20, 2022
    Publication date: June 8, 2023
    Inventors: Takayuki Sato, Masashi Hayashiguchi
  • Patent number: 11664298
    Abstract: A semiconductor module includes a semiconductor device and bus bar. The device includes an insulating substrate, conductive member, switching elements, and first/second input terminals. The substrate has main/back surfaces opposite in a thickness direction, with the conductive member disposed on the main surface. The switching elements are connected to the conductive member. The first input terminal, including a first terminal portion, is connected to the conductive member. The second input terminal, including a second terminal portion overlapping with the first terminal portion in the thickness direction, is connected to the switching elements. The second input terminal is separate from the first input terminal and conductive member in the thickness direction. The bus bar includes first/second terminals. The second terminal, separate from the first terminal in the thickness direction, partially overlaps with the first terminal in the thickness direction.
    Type: Grant
    Filed: April 15, 2022
    Date of Patent: May 30, 2023
    Assignee: ROHM CO., LTD.
    Inventors: Masashi Hayashiguchi, Takumi Kanda