Patents by Inventor Yuki Kawahara

Yuki Kawahara 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: 20240097526
    Abstract: A drive unit is configured to prevent an auxiliary electric motor from being rotated, which could otherwise cause the back electromotive voltage thereof to exceed the maximum rated voltage. The drive unit includes a drive source, a shaft, an auxiliary electric motor, and a clutch. The shaft is configured to transmit a torque outputted from the drive source. The clutch is disposed between the shaft and the auxiliary electric motor. The clutch is configured to allow transmission of a mechanical power from the auxiliary electric motor to the shaft regardless of whether the mechanical power is intended for forward rotation or reverse rotation, while being configured to block transmission of the torque from the shaft to the auxiliary electric motor regardless of whether the torque is intended for forward rotation or reverse rotation.
    Type: Application
    Filed: August 21, 2023
    Publication date: March 21, 2024
    Inventors: Yuki KAWAHARA, Misaki MINOHA, Hitoshi TERABAYASHI
  • Publication number: 20240055465
    Abstract: A highly functional photoelectric conversion element is provided.
    Type: Application
    Filed: December 14, 2021
    Publication date: February 15, 2024
    Inventors: Kenichi MURATA, Masahiro JOEI, Shintarou HIRATA, Shingo TAKAHASHI, Yoshiyuki OHBA, Takashi KOJIMA, Tomiyuki YUKAWA, Yoshifumi ZAIZEN, Tomohiro SUGIYAMA, Masaki OKAMOTO, Takuya MASUNAGA, Yuki KAWAHARA
  • Publication number: 20240047486
    Abstract: To stably generate avalanche amplification while suppressing a reduction in resolution. A solid-state imaging device according to an embodiment includes a photoelectric conversion region in an element region defined by a trench in a semiconductor substrate, a first semiconductor region surrounding the photoelectric conversion region, a first contact that contacts the first semiconductor region at a bottom of the trench, a second semiconductor region contacting the first semiconductor region and having a first conductivity type the same as the first semiconductor region, a third semiconductor region that contacts the second semiconductor region, between the second semiconductor region and a first surface, and having a second conductivity type, and a second contact on the first surface and contacting the third semiconductor region, wherein a height of the first contact from the first surface is different from a height of the third semiconductor region from the first surface.
    Type: Application
    Filed: October 17, 2023
    Publication date: February 8, 2024
    Applicant: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventor: Yuki KAWAHARA
  • Patent number: 11855105
    Abstract: To stably generate avalanche amplification while suppressing a reduction in resolution. A solid-state imaging device according to an embodiment includes a photoelectric conversion region in an element region defined by a trench in a semiconductor substrate, a first semiconductor region surrounding the photoelectric conversion region, a first contact that contacts the first semiconductor region at a bottom of the trench, a second semiconductor region contacting the first semiconductor region and having a first conductivity type the same as the first semiconductor region, a third semiconductor region that contacts the second semiconductor region, between the second semiconductor region and a first surface, and having a second conductivity type, and a second contact on the first surface and contacting the third semiconductor region, wherein a height of the first contact from the first surface is different from a height of the third semiconductor region from the first surface.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: December 26, 2023
    Assignee: Sony Semiconductor Solutions Corporation
    Inventor: Yuki Kawahara
  • Patent number: 11831221
    Abstract: A drive device includes a fluid coupling, a transmission shaft, and a rotary electrical machine. The fluid coupling includes a cover, a turbine, and an impeller. The turbine is fixed to the cover. The impeller is disposed inside an outer shell formed by the cover and the turbine. The impeller is opposed to the turbine. The transmission shaft extends to penetrate the outer shell of the fluid coupling. The transmission shaft is connected to the impeller. The rotary electrical machine includes a first stator and a rotor. The first stator is disposed in a non-rotatable manner. The rotor is attached to the outer shell of the fluid coupling.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: November 28, 2023
    Assignee: EXEDY Corporation
    Inventors: Kenji Kitada, Yuki Kawahara, Tomohiro Wada, Takuma Shimada, Yukiyoshi Takada
  • Patent number: 11777368
    Abstract: A drive device includes a fluid coupling and a rotary electrical machine. The fluid coupling includes an impeller and a turbine, and is configured such that a torque is inputted thereto from one axial side and outputted therefrom to another axial side. The rotary electrical machine includes a first stator and a rotor. The first stator is disposed in a non-rotatable manner. The rotor is disposed to be rotated about a rotational axis of the fluid coupling. The first stator includes a first stator core, first and second coil ends. The first coil end protrudes from the first stator core in an axial direction. The second coil end protrudes from the first stator core to an opposite side of the first coil end in the axial direction. The first coil end is bent radially outward and located in part radially outside an outer peripheral surface of the first stator core.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: October 3, 2023
    Assignee: EXEDY Corporation
    Inventors: Kenji Kitada, Yuki Kawahara, Tomohiro Wada, Takuma Shimada, Yukiyoshi Takada
  • Publication number: 20230275112
    Abstract: To provide a semiconductor device with which it is possible to reduce parasitic capacitance between electrodes for a resistance element, and a method for manufacturing the semiconductor device. A semiconductor device according to the present disclosure includes: a substrate; a first resistance layer provided on the substrate; a first electrode in contact with a lower surface of the first resistance layer; and a second electrode in contact with an upper surface of the first resistance layer.
    Type: Application
    Filed: April 6, 2021
    Publication date: August 31, 2023
    Applicant: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventors: Hirokazu EJIRI, Jun OGI, Yuki KAWAHARA, Chigusa YAMANE
  • Patent number: 11543002
    Abstract: A power transmission device includes an input rotary member, an intermediate rotary member, an output rotary member, a friction engaging part and a load adjusting mechanism. A torque is inputted to the input rotary member. The torque is inputted from the input rotary member to the intermediate rotary member. The torque is outputted from the output rotary member. The friction engaging part is engaged by friction with a friction force depending on a load applied thereto. The friction engaging part is configured to transmit the torque between the intermediate rotary member and the output rotary member. The load adjusting mechanism is configured to adjust the load applied to the friction engaging part in accordance with the torque inputted to the input rotary member.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: January 3, 2023
    Assignee: EXEDY CORPORATION
    Inventors: Yuki Kawahara, Hitoshi Katsura, Katsuaki Waki
  • Patent number: 11535094
    Abstract: A drive unit includes a rotary electric machine, a first fluid coupling, and a differential device. The first fluid coupling is configured to transmit a power outputted from the rotary electric machine through a hydraulic fluid. The differential device is disposed coaxial with the first fluid coupling. The differential device is configured to cause differential rotation of a pair of drive wheels.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: December 27, 2022
    Assignee: EXEDY CORPORATION
    Inventor: Yuki Kawahara
  • Publication number: 20220392944
    Abstract: A solid-state image sensor including a photoelectric conversion region partitioned by trenches, a first semiconductor region surrounding the photoelectric conversion region, a first contact in contact with the first semiconductor region at a bottom portion of the trench, a first electrode in contact with the first contact in the first trench, a second semiconductor region in contact with the first semiconductor region having the same conductive type as the first semiconductor region, a third semiconductor region in contact with the second semiconductor region, between the second semiconductor region and a first surface, and having a second conductive type, a second contact on the first surface in contact with the third semiconductor region, and a second electrode in contact with the second contact, and a second surface at which the first contact and the first electrode are in contact with each other is inclined with respect to the first surface.
    Type: Application
    Filed: November 10, 2020
    Publication date: December 8, 2022
    Applicant: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventors: Yasuhisa TOCHIGI, Yuki KAWAHARA
  • Publication number: 20220352226
    Abstract: A semiconductor apparatus that makes it possible to suppress propagation of noise and heat between elements formed in upper and lower substrates in a stacked structure of plural substrates and suppress deterioration of characteristics of the elements is provided. The semiconductor apparatus includes: a first substrate including a first element layer including a first active element, a first wiring layer arranged on the first element layer, and a shield layer including an electrically conductive material arranged on the first wiring layer; and a second substrate including a second element layer including a second active element arranged on the shield layer, and a second wiring layer arranged on the second element layer, in which the first substrate and the second substrate are stacked one on another.
    Type: Application
    Filed: June 26, 2020
    Publication date: November 3, 2022
    Inventors: TOSHIHIKO MIYAZAKI, YUKI KAWAHARA, TSUYOSHI SUZUKI, TADASHI IIJIMA
  • Publication number: 20220333031
    Abstract: To provide a fluid dynamic bearing lubricating oil base oil which is within a suitable 40° C. and 100° C. kinematic viscosity range capable of achieving both energy saving and high bearing rigidity, and is excellent in viscosity index, heat resistance (evaporation resistance), and low temperature fluidity. Provided is a fluid dynamic bearing lubricating oil base oil containing an isophthalic acid diester compound represented by the following general formula (1) wherein R1 and R2 are the same or different and each represent a linear alkyl group having 6 to 10 carbon atoms.
    Type: Application
    Filed: April 19, 2022
    Publication date: October 20, 2022
    Inventors: Meguru SUGIYAMA, Akane KATO, Akinobu TAKEGAMI, Yuki KAWAHARA, Naoko KASHIWA
  • Publication number: 20220333030
    Abstract: To provide a fluid dynamic bearing lubricating oil base oil which is within a suitable 40° C. and 100° C. kinematic viscosity range capable of achieving both energy saving and high bearing rigidity, and is excellent in viscosity index, heat resistance (evaporation resistance), and low temperature fluidity. Provided is a fluid dynamic bearing lubricating oil base oil containing a trimellitic acid triester compound represented by the following general formula (1) wherein R1 to R3 are the same or different and each represent a linear alkyl group having 6 to 10 carbon atoms.
    Type: Application
    Filed: April 19, 2022
    Publication date: October 20, 2022
    Inventors: Meguru SUGIYAMA, Akane KATO, Akinobu TAKEGAMI, Yuki KAWAHARA, Naoko KASHIWA
  • Publication number: 20220314767
    Abstract: A drive unit includes a rotary electric machine, a first fluid coupling, and a differential device. The first fluid coupling is configured to transmit a power outputted from the rotary electric machine through a hydraulic fluid. The differential device is disposed coaxial with the first fluid coupling. The differential device is configured to cause differential rotation of a pair of drive wheels.
    Type: Application
    Filed: March 1, 2022
    Publication date: October 6, 2022
    Inventor: Yuki Kawahara
  • Patent number: 11433755
    Abstract: A drive device includes a fluid coupling and a rotary electrical machine. The fluid coupling is configured such that a torque is inputted thereto from a first side in an axial direction and is outputted therefrom to a second side in the axial direction. The rotary electrical machine includes a first stator and a rotor. The first stator is disposed in a non-rotatable manner. The rotor is disposed to be rotated about a rotational axis of the fluid coupling. The rotary electrical machine is disposed on the second side with respect to the fluid coupling in the axial direction. The rotary electrical machine overlaps the fluid coupling in an axial view.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: September 6, 2022
    Assignee: EXEDY CORPORATION
    Inventors: Kenji Kitada, Yuki Kawahara, Tomohiro Wada, Takuma Shimada, Yukiyoshi Takada
  • Patent number: 11433756
    Abstract: A drive device includes a fluid coupling, a rotary electrical machine, and a damper device. The fluid coupling includes an input unit and an output unit. The input unit includes an impeller. The output unit includes a turbine. The rotary electrical machine includes a first stator and a rotor. The first stator is disposed in a non-rotatable manner. The rotor is attached to the output unit. The damper device is disposed axially adjacent to the fluid coupling. The damper device is connected to the input unit.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: September 6, 2022
    Assignee: EXEDY CORPORATION
    Inventors: Kenji Kitada, Yuki Kawahara, Tomohiro Wada, Takuma Shimada, Yukiyoshi Takada
  • Publication number: 20220205484
    Abstract: In a fluid bearing lubricating oil, a viscosity index improver including polymethacrylate is added to an ester oil-based base oil.
    Type: Application
    Filed: December 27, 2021
    Publication date: June 30, 2022
    Inventor: Yuki KAWAHARA
  • Publication number: 20220157867
    Abstract: To stably generate avalanche amplification while suppressing a reduction in resolution. A solid-state imaging device according to an embodiment includes a photoelectric conversion region in an element region defined by a trench in a semiconductor substrate, a first semiconductor region surrounding the photoelectric conversion region, a first contact that contacts the first semiconductor region at a bottom of the trench, a second semiconductor region contacting the first semiconductor region and having a first conductivity type the same as the first semiconductor region, a third semiconductor region that contacts the second semiconductor region, between the second semiconductor region and a first surface, and having a second conductivity type, and a second contact on the first surface and contacting the third semiconductor region, wherein a height of the first contact from the first surface is different from a height of the third semiconductor region from the first surface.
    Type: Application
    Filed: March 16, 2020
    Publication date: May 19, 2022
    Applicant: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventor: Yuki KAWAHARA
  • Publication number: 20220077746
    Abstract: A drive device includes a fluid coupling and a rotary electrical machine. The fluid coupling includes an impeller and a turbine, and is configured such that a torque is inputted thereto from one axial side and outputted therefrom to another axial side. The rotary electrical machine includes a first stator and a rotor. The first stator is disposed in a non-rotatable manner. The rotor is disposed to be rotated about a rotational axis of the fluid coupling. The first stator includes a first stator core, first and second coil ends. The first coil end protrudes from the first stator core in an axial direction. The second coil end protrudes from the first stator core to an opposite side of the first coil end in the axial direction. The first coil end is bent radially outward and located in part radially outside an outer peripheral surface of the first stator core.
    Type: Application
    Filed: August 9, 2021
    Publication date: March 10, 2022
    Inventors: Kenji KITADA, Yuki KAWAHARA, Tomohiro WADA, Takuma SHIMADA, Yukiyoshi TAKADA
  • Publication number: 20220077747
    Abstract: A drive device includes a fluid coupling, a transmission shaft, and a rotary electrical machine. The fluid coupling includes a cover, a turbine, and an impeller. The turbine is fixed to the cover. The impeller is disposed inside an outer shell formed by the cover and the turbine. The impeller is opposed to the turbine. The transmission shaft extends to penetrate the outer shell of the fluid coupling. The transmission shaft is connected to the impeller . The rotary electrical machine includes a first stator and a rotor. The first stator is disposed in a non-rotatable manner. The rotor is attached to the outer shell of the fluid coupling.
    Type: Application
    Filed: August 9, 2021
    Publication date: March 10, 2022
    Inventors: Kenji KITADA, Yuki KAWAHARA, Tomohiro WADA, Takuma SHIMADA, Yukiyoshi TAKADA