Patents by Inventor Shohei Nagai

Shohei Nagai 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: 20240076426
    Abstract: The present invention relates to resin particles including a residue unit represented by the following general formula (1) and having a volume average particle diameter equal to or more than 5 ?m and equal to or less than 2008 ?m, and a method for producing thereof. Fruthermore the present invention relates to a fluororesin comprising a residue unit represented by a general formula (1) and having a weight average molecular weight Mw in a range of 5×104 to 3×105, and a yellow index of a heat-melted molded product (thickness 3 mm) after 24 h at 280° C. of equal to or less than 6, and a method for producing thereof. In the formula (1), Rf1, Rf2, Rf3, and Rf4 are each independently one of the groups consisting of a fluorine atom, a linear perfluoroalkyl group having 1 to 7 carbon atoms, a branched perfluoroalkyl group having 3 to 7 carbon atoms, or a cyclic perfluoroalkyl group having 3 to 7 carbon atoms. The perfluoroalkyl group may have an ethereal oxygen atom.
    Type: Application
    Filed: September 21, 2023
    Publication date: March 7, 2024
    Applicant: TOSOH CORPORATION
    Inventors: Shohei YUMINO, Tomoya SHIMONO, Kota SAKAGUCHI, Tomonari NAGAI, Kazunari IWANAGA, Masao TANABIKI, Toru DOI
  • Patent number: 11864323
    Abstract: A driver board assembly includes a printed circuit board (PCB) substrate, one or more power devices embedded within the PCB substrate, and a plurality of conductive layers arranged within the PCB substrate. The plurality of conductive layers are configured to electrically couple the one or more power devices to a current source and thermally couple the one or more power devices to one or more cooling assemblies mounted to at least one of a first surface of the PCB substrate and a second surface of the PCB substrate opposite the first surface of the PCB substrate.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: January 2, 2024
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha
    Inventors: Feng Zhou, Shohei Nagai
  • Patent number: 11825594
    Abstract: A semiconductor device includes: a substrate main body having a first surface and a second surface; an electric component arranged in the substrate main body; a surface conductor pattern arranged in a first circuit layer located on the second surface. Also included is a first internal conductor pattern and a second internal conductor pattern arranged in a second circuit layer located between the electric component and the second surface, and insulated from each other. Also, at least one first heat conductor via extends from the electric component to the first internal conductor pattern; and at least one second heat conductor via extends from the surface conductor pattern to the second internal conductor pattern.
    Type: Grant
    Filed: February 24, 2022
    Date of Patent: November 21, 2023
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, MIRISE Technologies Corporation
    Inventor: Shohei Nagai
  • Patent number: 11802739
    Abstract: A cooling assembly includes a housing defining a fluid chamber, wick structures arranged on an interior surface of the fluid chamber such that one or more flow channels are present therebetween, and a divider. The divider includes an outer frame comprising a first side and a second side and one or more bridging supports extending between and connecting the first side and the second side of the outer frame. The one or more bridging supports are aligned with the one or more flow channels between the wick structures. Each one of the one or more bridging supports define a plurality of vapor flow paths extending therethrough. The one or more bridging supports further define a plurality of vapor spaces between the one or more bridging supports that are aligned with the wick structures. The plurality of vapor flow paths are fluidly coupled to the vapor spaces.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: October 31, 2023
    Assignees: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Feng Zhou, Danny J. Lohan, Shailesh N. Joshi, Hitoshi Fujioka, Shohei Nagai, Hiroshi Ukegawa
  • Patent number: 11776875
    Abstract: Embedded cooling systems and methods of forming the same are disclosed. A system may include a PCB stack comprising a first major substrate opposite a second major substrate, a pre-preg layer disposed between the first and second major substrates, a power device stack embedded within the PCB stack and comprising a substrate, a power device coupled to the substrate of the power device stack, and a vapor chamber embedded within at least the pre-preg layer of the PCB stack and the power device stack being coupled to the vapor chamber.
    Type: Grant
    Filed: February 3, 2021
    Date of Patent: October 3, 2023
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha
    Inventors: Feng Zhou, Shohei Nagai, Hiroshi Ukegawa
  • Publication number: 20230262871
    Abstract: A power electronics module includes a heat sink structurally configured to dissipate thermal energy, an electrically-insulating layer directly contacting the heat sink, a conductive substrate positioned on and in direct contact with the electrically-insulating layer, a power electronics device positioned on and in direct contact with the conductive substrate, a printed circuit board layer that at least partially encapsulates the conductive substrate and the power electronics device, and a driver circuit component positioned on a surface of the printed circuit board layer.
    Type: Application
    Filed: April 25, 2023
    Publication date: August 17, 2023
    Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha
    Inventors: Feng Zhou, Shohei Nagai
  • Patent number: 11665813
    Abstract: A power electronics module includes a heat sink structurally configured to dissipate thermal energy, an electrically-insulating layer directly contacting the heat sink, a conductive substrate positioned on and in direct contact with the electrically-insulating layer, a power electronics device positioned on and in direct contact with the conductive substrate, a printed circuit board layer that at least partially encapsulates the conductive substrate and the power electronics device, and a driver circuit component positioned on a surface of the printed circuit board layer.
    Type: Grant
    Filed: August 14, 2020
    Date of Patent: May 30, 2023
    Assignees: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Feng Zhou, Shohei Nagai
  • Patent number: 11602087
    Abstract: A cold plate includes a first cooling surface comprising a first cooling structure bonded to an inner surface of the first cooling surface, a second cooling surface comprising a second cooling structure bonded to an inner surface of the second cooling surface, a manifold comprising an internal cavity defined by a first length, a first width, and a first height, and a flow divider defined by a second length, a second width, and a second height. The manifold is enclosed by the first cooling surface and the second cooling surface on opposing surfaces of the manifold separated by the first height. The flow divider is positioned within the internal cavity of the manifold. The flow divider supports and separates the first cooling structure and the second cooling structure by a portion of the second height of the flow divider.
    Type: Grant
    Filed: February 2, 2021
    Date of Patent: March 7, 2023
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
    Inventors: Feng Zhou, Shohei Nagai, Shailesh N. Joshi, Hitoshi Fujioka, Danny J. Lohan, Hiroshi Ukegawa, Ercan Mehmet Dede
  • Patent number: 11497112
    Abstract: A circuit board assembly includes a printed circuit board (PCB) substrate, a cooling assembly, an intermediate layer, one or more power devices, and a plurality of conductive layers arranged within the PCB substrate. The PCB substrate has a first surface and an opposite second surface that has a first electrical pattern. The cooling assembly is thermally coupled to the second surface of the PCB substrate. The intermediate layer is sandwiched between the PCB substrate and the cooling assembly. The one or more power devices are embedded within the PCB substrate. The plurality of conductive layers are configured to electrically couple the one or more power devices and thermally couple the one or more power devices to the cooling assembly. At least a portion of the intermediate layer has a second electrical pattern that is similarly patterned to the first electrical pattern of the second surface of the PCB substrate.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: November 8, 2022
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha
    Inventors: Feng Zhou, Hiroshi Ukegawa, Shohei Nagai
  • Publication number: 20220322515
    Abstract: A semiconductor device includes: a substrate main body having a first surface and a second surface; an electric component arranged in the substrate main body; a surface conductor pattern arranged in a first circuit layer located on the second surface; a first internal conductor pattern and a second internal conductor pattern arranged in a second circuit layer located between the electric component and the second surface, and insulated from each other; at least one first heat conductor via extending from the electric component to the first internal conductor pattern; and at least one second heat conductor via extending from the surface conductor pattern to the second internal conductor pattern.
    Type: Application
    Filed: February 24, 2022
    Publication date: October 6, 2022
    Inventor: Shohei NAGAI
  • Publication number: 20220319998
    Abstract: A semiconductor device includes: a substrate main body having a first surface and a second surface; an electric component arranged in the substrate main body; a first terminal and a second terminal arranged on the first surface or the second surface, respectively; a first internal conductor pattern arranged in a first circuit layer arranged between the electric component and the first surface, and electrically connected to the first terminal and the electric component; and a second internal conductor pattern arranged in a second circuit layer arranged between the electric component and the second surface, and electrically connected to the second terminal and the electric component. The first internal conductor pattern and the second internal conductor pattern are at least partially opposed to each other inside the substrate main body.
    Type: Application
    Filed: February 24, 2022
    Publication date: October 6, 2022
    Inventor: Shohei Nagai
  • Publication number: 20220319953
    Abstract: A semiconductor device includes a substrate main body having a first surface and a second surface, an electric component arranged in the substrate main body, a first internal conductor pattern arranged in a first circuit layer located between the first surface and the electric component, and at least one heat absorbing member arranged inside the substrate main body and thermally connected to the first internal conductor pattern.
    Type: Application
    Filed: February 24, 2022
    Publication date: October 6, 2022
    Inventors: Shohei NAGAI, Masaki AOSHIMA
  • Publication number: 20220310549
    Abstract: A semiconductor device includes a substrate, a semiconductor element and a tin-based solder layer. The semiconductor element faces the substrate in a normal direction of the substrate. The normal direction corresponds to a normal line of the substrate. The tin-based solder layer joins the semiconductor element to the substrate. The tin-based solder layer a central portion and a peripheral portion surrounding the central portion. The tin-based solder layer has a tin crystal with a C-axis at each of the central portion and the peripheral portion. The C-axis at the central portion intersects the normal line at an angle larger than 45 degrees with respect to the normal line. The C-axis at the peripheral portion either intersects the normal line at an angle smaller than or equal to 45 degrees with respect to the normal line, or is parallel to the normal line.
    Type: Application
    Filed: March 8, 2022
    Publication date: September 29, 2022
    Inventor: Shohei NAGAI
  • Publication number: 20220304198
    Abstract: A power converter includes: a semiconductor module that includes a semiconductor element for power conversion, the semiconductor module having a module surface on which an input terminal electrically connected to the semiconductor element is disposed; a capacitor in which a capacitor terminal is disposed, the capacitor having a capacitor surface facing the module surface; a cooler that is disposed between the semiconductor module and the capacitor; and a connecting member that electrically connects the input terminal and the capacitor terminal.
    Type: Application
    Filed: March 2, 2022
    Publication date: September 22, 2022
    Inventor: Shohei NAGAI
  • Publication number: 20220293485
    Abstract: A semiconductor device includes a semiconductor chip, a heat sink, a resin package, heat transfer material and multiple spacers. The heat sink absorbs heat of the semiconductor chip. The resin package accommodates the semiconductor chip, and the resin package has a surface at which the heat sink is disposed. The heat transfer material has fluidity, and the heat transfer material is filled between the heat sink and the cooling plate. The spacers are dispersedly arranged in the heat transfer material, and the spacers are in contact with the heat sink and the cooling plate.
    Type: Application
    Filed: March 2, 2022
    Publication date: September 15, 2022
    Inventor: Shohei NAGAI
  • Publication number: 20220285245
    Abstract: A semiconductor module includes a substrate, a semiconductor element and a heat sink plate. The substrate is included in a circuit board. The semiconductor element is disposed at the heat sink plate inside the substrate. A fluid is sealed inside the heat sink plate.
    Type: Application
    Filed: February 23, 2022
    Publication date: September 8, 2022
    Inventor: Shohei NAGAI
  • Patent number: 11388839
    Abstract: A power electronics module includes a cold plate manifold, a heat sink base layer at least partially embedded in the cold plate manifold, an electrically-insulating layer in direct contact with the heat sink base layer, a conductive substrate positioned on the electrically-insulating layer, and a power electronics device coupled to and in direct contact with the conductive substrate.
    Type: Grant
    Filed: August 14, 2020
    Date of Patent: July 12, 2022
    Assignees: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Feng Zhou, Shohei Nagai
  • Publication number: 20220192002
    Abstract: A circuit board assembly includes a printed circuit board (PCB) substrate, a cooling assembly, an intermediate layer, one or more power devices, and a plurality of conductive layers arranged within the PCB substrate. The PCB substrate has a first surface and an opposite second surface that has a first electrical pattern. The cooling assembly is thermally coupled to the second surface of the PCB substrate. The intermediate layer is sandwiched between the PCB substrate and the cooling assembly. The one or more power devices are embedded within the PCB substrate. The plurality of conductive layers are configured to electrically couple the one or more power devices and thermally couple the one or more power devices to the cooling assembly. At least a portion of the intermediate layer has a second electrical pattern that is similarly patterned to the first electrical pattern of the second surface of the PCB substrate.
    Type: Application
    Filed: December 11, 2020
    Publication date: June 16, 2022
    Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha
    Inventors: Feng Zhou, Hiroshi Ukegawa, Shohei Nagai
  • Publication number: 20220157693
    Abstract: Embedded cooling systems and methods of forming the same are disclosed. A system may include a PCB stack comprising a first major substrate opposite a second major substrate, a pre-preg layer disposed between the first and second major substrates, a power device stack embedded within the PCB stack and comprising a substrate, a power device coupled to the substrate of the power device stack, and a vapor chamber embedded within at least the pre-preg layer of the PCB stack and the power device stack being coupled to the vapor chamber.
    Type: Application
    Filed: February 3, 2021
    Publication date: May 19, 2022
    Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha
    Inventors: Feng Zhou, Shohei Nagai, Hiroshi Ukegawa
  • Patent number: 11328980
    Abstract: A power device embedded PCB includes a printed circuit board having a first major surface separated by a thickness and opposite a second major surface and an embedded power device. The embedded power device may include a power semiconductor device, an electrically and thermally conductive substrate bonded to the power semiconductor device along a first surface of the electrically and thermally conductive substrate and bonded to an electrical insulation layer on a second surface of the electrically and thermally conductive substrate opposite the first surface and a thermally conductive substrate bonded to the electrical insulation layer on a surface opposite the bonded electrically and thermally conductive substrate. The power semiconductor device, the electrically and thermally conductive substrate, the electrical insulation layer, and the thermally conductive substrate are disposed within the printed circuit board.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: May 10, 2022
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Feng Zhou, Shohei Nagai