Patents by Inventor Kazushige Kawasaki

Kazushige Kawasaki 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: 20240099013
    Abstract: According to one embodiment, the array chip includes a three-dimensionally disposed plurality of memory cells and a memory-side interconnection layer connected to the memory cells. The circuit chip includes a substrate, a control circuit provided on the substrate, and a circuit-side interconnection layer provided on the control circuit and connected to the control circuit. The circuit chip is stuck to the array chip with the circuit-side interconnection layer facing to the memory-side interconnection layer. The bonding metal is provided between the memory-side interconnection layer and the circuit-side interconnection layer. The bonding metal is bonded to the memory-side interconnection layer and the circuit-side interconnection layer.
    Type: Application
    Filed: November 27, 2023
    Publication date: March 21, 2024
    Applicant: Kioxia Corporation
    Inventors: Yoshiaki FUKUZUMI, Hideaki AOCHI, Mie MATSUO, Kenichiro YOSHII, Koichiro SHINDO, Kazushige KAWASAKI, Tomoya SANUKI
  • Patent number: 11871576
    Abstract: According to one embodiment, the array chip includes a three-dimensionally disposed plurality of memory cells and a memory-side interconnection layer connected to the memory cells. The circuit chip includes a substrate, a control circuit provided on the substrate, and a circuit-side interconnection layer provided on the control circuit and connected to the control circuit. The circuit chip is stuck to the array chip with the circuit-side interconnection layer facing to the memory-side interconnection layer. The bonding metal is provided between the memory-side interconnection layer and the circuit-side interconnection layer. The bonding metal is bonded to the memory-side interconnection layer and the circuit-side interconnection layer.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: January 9, 2024
    Assignee: Kioxia Corporation
    Inventors: Yoshiaki Fukuzumi, Hideaki Aochi, Mie Matsuo, Kenichiro Yoshii, Koichiro Shindo, Kazushige Kawasaki, Tomoya Sanuki
  • Publication number: 20230282536
    Abstract: According to one embodiment, a semiconductor device includes a wiring substrate having a first surface, a second surface opposite to the first surface, and a side surface connecting the first surface and the second surface. A first electrode is on the first surface. A semiconductor element is on the wiring substrate and electrically connected to the first electrode. A resin layer covers the semiconductor element and the first surface from a first direction orthogonal to the first surface. A portion of the resin layer contacts the side surface of the wiring substrate from a second direction parallel to the first surface. The resin layer has an outside side surface that is substantially parallel to the first direction.
    Type: Application
    Filed: August 26, 2022
    Publication date: September 7, 2023
    Inventors: Kazushige Kawasaki, Satoru Itakura
  • Publication number: 20230207520
    Abstract: A semiconductor device includes a wiring substrate inside which a wiring layer is provided, a plurality of first semiconductor chips stacked in a shifted manner on the wiring substrate and each provided with a connection terminal on a surface facing the wiring substrate, and a second semiconductor chip having a function different from functions of the first semiconductor chips and provided on the wiring substrate on a side where the connection terminals are electrically connected to the wiring substrate.
    Type: Application
    Filed: September 21, 2022
    Publication date: June 29, 2023
    Applicant: Kioxia Corporation
    Inventors: Masayuki MIURA, Kazuma HASEGAWA, Kazushige KAWASAKI
  • Patent number: 11568901
    Abstract: A semiconductor device of an embodiment includes: a wiring board having a first surface and a second surface on a side opposite to the first surface; a first semiconductor element on the first surface of the wiring board; a second semiconductor element on the first surface of the wiring board; and a first sealing material that seals at least the second semiconductor element. A slit is formed in the first sealing material between the first semiconductor element and the second semiconductor element. When a thickness of the first sealing material on the first semiconductor element is t1 and a thickness of the first sealing material on the second semiconductor element is t2, the t1 and the t2 satisfy a relationship of 0?t1<t2.
    Type: Grant
    Filed: September 9, 2021
    Date of Patent: January 31, 2023
    Assignee: KIOXIA CORPORATION
    Inventors: Kazushige Kawasaki, Masayuki Miura, Hideko Mukaida
  • Publication number: 20220293138
    Abstract: A semiconductor device of an embodiment includes: a wiring board having a first surface and a second surface on a side opposite to the first surface; a first semiconductor element on the first surface of the wiring board; a second semiconductor element on the first surface of the wiring board; and a first sealing material that seals at least the second semiconductor element. A slit is formed in the first sealing material between the first semiconductor element and the second semiconductor element. When a thickness of the first sealing material on the first semiconductor element is t1 and a thickness of the first sealing material on the second semiconductor element is t2, the t1 and the t2 satisfy a relationship of 0?t1<t2.
    Type: Application
    Filed: September 9, 2021
    Publication date: September 15, 2022
    Applicant: Kioxia Corporation
    Inventors: Kazushige KAWASAKI, Masayuki MIURA, Hideko MUKAIDA
  • Patent number: 11270981
    Abstract: According to one embodiment, a memory device includes: a first chip including a first circuit, first and second terminals; a second chip including a second circuit and a third terminal; and an interface chip including first and second voltage generators. The first chip is between the second chip and the interface chip. The first terminal is connected between the first circuit and the first voltage generator. A third end of the second terminal is connected to the third terminal and a fourth end of the second terminal is connected to the second voltage generator. A fifth end of the third terminal is connected to the second circuit and a sixth end of the third terminal is connected to the second voltage generator via the second terminal. The third end overlaps with the sixth end, without overlapping with the fourth end.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: March 8, 2022
    Assignee: KIOXIA CORPORATION
    Inventors: Mikihiko Ito, Masaru Koyanagi, Masafumi Nakatani, Shinya Okuno, Shigeki Nagasaka, Masahiro Yoshihara, Akira Umezawa, Satoshi Tsukiyama, Kazushige Kawasaki
  • Publication number: 20210118898
    Abstract: According to one embodiment, the array chip includes a three-dimensionally disposed plurality of memory cells and a memory-side interconnection layer connected to the memory cells. The circuit chip includes a substrate, a control circuit provided on the substrate, and a circuit-side interconnection layer provided on the control circuit and connected to the control circuit. The circuit chip is stuck to the array chip with the circuit-side interconnection layer facing to the memory-side interconnection layer. The bonding metal is provided between the memory-side interconnection layer and the circuit-side interconnection layer. The bonding metal is bonded to the memory-side interconnection layer and the circuit-side interconnection layer.
    Type: Application
    Filed: December 7, 2020
    Publication date: April 22, 2021
    Applicant: Toshiba Memory Corporation
    Inventors: Yoshiaki FUKUZUMI, Hideaki AOCHI, Mie MATSUO, Kenichiro YOSHII, Koichiro SHINDO, Kazushige KAWASAKI, Tomoya SANUKI
  • Patent number: 10892269
    Abstract: According to one embodiment, the array chip includes a three-dimensionally disposed plurality of memory cells and a memory-side interconnection layer connected to the memory cells. The circuit chip includes a substrate, a control circuit provided on the substrate, and a circuit-side interconnection layer provided on the control circuit and connected to the control circuit. The circuit chip is stuck to the array chip with the circuit-side interconnection layer facing to the memory-side interconnection layer. The bonding metal is provided between the memory-side interconnection layer and the circuit-side interconnection layer. The bonding metal is bonded to the memory-side interconnection layer and the circuit-side interconnection layer.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: January 12, 2021
    Assignee: Toshiba Memory Corporation
    Inventors: Yoshiaki Fukuzumi, Hideaki Aochi, Mie Matsuo, Kenichiro Yoshii, Koichiro Shindo, Kazushige Kawasaki, Tomoya Sanuki
  • Publication number: 20210005580
    Abstract: According to one embodiment, a memory device includes: a first chip including a first circuit, first and second terminals; a second chip including a second circuit and a third terminal; and an interface chip including first and second voltage generators. The first chip is between the second chip and the interface chip. The first terminal is connected between the first circuit and the first voltage generator. A third end of the second terminal is connected to the third terminal and a fourth end of the second terminal is connected to the second voltage generator. A fifth end of the third terminal is connected to the second circuit and a sixth end of the third terminal is connected to the second voltage generator via the second terminal. The third end overlaps with the sixth end, without overlapping with the fourth end.
    Type: Application
    Filed: September 17, 2020
    Publication date: January 7, 2021
    Applicant: Toshiba Memory Corporation
    Inventors: Mikihiko ITO, Masaru KOYANAGI, Masafumi NAKATANI, Shinya OKUNO, Shigeki NAGASAKA, Masahiro YOSHIHARA, Akira UMEZAWA, Satoshi TSUKIYAMA, Kazushige KAWASAKI
  • Patent number: 10811393
    Abstract: According to one embodiment, a memory device includes: a first chip including a first circuit, first and second terminals; a second chip including a second circuit and a third terminal; and an interface chip including first and second voltage generators. The first chip is between the second chip and the interface chip. The first terminal is connected between the first circuit and the first voltage generator. A third end of the second terminal is connected to the third terminal and a fourth end of the second terminal is connected to the second voltage generator. A fifth end of the third terminal is connected to the second circuit and a sixth end of the third terminal is connected to the second voltage generator via the second terminal. The third end overlaps with the sixth end, without overlapping with the fourth end.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: October 20, 2020
    Assignee: Toshiba Memory Corporation
    Inventors: Mikihiko Ito, Masaru Koyanagi, Masafumi Nakatani, Shinya Okuno, Shigeki Nagasaka, Masahiro Yoshihara, Akira Umezawa, Satoshi Tsukiyama, Kazushige Kawasaki
  • Patent number: 10784648
    Abstract: A semiconductor device according to the present invention includes a substrate, a semiconductor laser that is provided on an upper surface of the substrate and emits laser light, a waveguide having a first conductive layer provided on the upper surface of the substrate, and a waveguide layer that is provided on the first conductive layer and guides the laser light and an embedment layer provided on the upper surface of the substrate and surrounding the semiconductor laser and the waveguide, wherein on both sides of an end part, of the waveguide, which is connected to the semiconductor laser, an exposed part is provided in which the substrate is exposed from the embedment layer by the embedment layer separated in a waveguide direction of the waveguide, and in the end part, a separation region is provided in which the first conductive layer is separated in the waveguide direction.
    Type: Grant
    Filed: May 29, 2017
    Date of Patent: September 22, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazushige Kawasaki
  • Patent number: 10777529
    Abstract: A semiconductor device includes a base member; a first stacked body including first semiconductor chips and second semiconductor chips stacked alternately in a first direction crossing a front surface of the base member; and a second stacked body arranged with the first stacked body in a second direction along the front surface of the base member. The second stacked body includes other first semiconductor chips and other second semiconductor chips stacked alternately in the first direction. The first stacked body includes a lowermost first semiconductor chip connected to the base member, and the second stacked body includes a lowermost second semiconductor chip connected to the base member.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: September 15, 2020
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventor: Kazushige Kawasaki
  • Patent number: 10734360
    Abstract: A semiconductor device includes a base member and semiconductor chips stacked on the base member. The semiconductor chips include a first semiconductor chip and a second semiconductor chip adjacent to the first semiconductor chip. The first semiconductor chip includes a semiconductor substrate, a functional layer and through electrodes. The through electrodes extend from the back surface to the front surface of the semiconductor substrate, and are electrically connected to the functional layer on the front surface. The second semiconductor chip is electrically connected to the first semiconductor chip through connection members connected to the through electrodes. The functional layer includes first and second contact pads. The second contact pad is positioned at a level between the semiconductor substrate and the first contact pad. The through electrodes include a first through electrode connected to the first contact pad and a second through electrode connected to the second contact pad.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: August 4, 2020
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Satoshi Tsukiyama, Masaru Koyanagi, Mikihiko Ito, Kazushige Kawasaki
  • Publication number: 20200091675
    Abstract: A semiconductor device according to the present invention includes a substrate, a semiconductor laser that is provided on an upper surface of the substrate and emits laser light, a waveguide having a first conductive layer provided on the upper surface of the substrate, and a waveguide layer that is provided on the first conductive layer and guides the laser light and an embedment layer provided on the upper surface of the substrate and surrounding the semiconductor laser and the waveguide, wherein on both sides of an end part, of the waveguide, which is connected to the semiconductor laser, an exposed part is provided in which the substrate is exposed from the embedment layer by the embedment layer separated in a waveguide direction of the waveguide, and in the end part, a separation region is provided in which the first conductive layer is separated in the waveguide direction.
    Type: Application
    Filed: May 29, 2017
    Publication date: March 19, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventor: Kazushige KAWASAKI
  • Patent number: 10593649
    Abstract: A semiconductor device includes a base member, a stacked body on the base member, a first conductor on the stacked body, a second conductor on a top surface of the base member, and a connection conductor connecting the first conductor and the second conductor. The stacked body includes semiconductor chips stacked and a shared terminal connected to the plurality of semiconductor chips. The plurality of semiconductor chips each includes a functional element on a front surface side thereof and a through electrode extending from a back surface to the front surface side. The shared terminal has a top end positioned at a top surface of the stacked body and a bottom end positioned at a bottom surface of the stacked body. The first conductor is connected to the top end of the shared terminal, and the second conductor is electrically connected to the bottom end of the shared terminal.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: March 17, 2020
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Satoshi Tsukiyama, Masaru Koyanagi, Mikihiko Ito, Kazushige Kawasaki
  • Patent number: 10510725
    Abstract: A semiconductor device includes a base member having a first surface and a second surface on a side opposite to the first surface, the base member including at least one interconnect extending in a first direction along the first surface; two or more stacked bodies arranged in the first direction on the first surface, each of the two or more stacked bodies including semiconductor chips stacked in a second direction perpendicular to the first surface; and logic chips electrically connected respectively to the stacked bodies. Each of semiconductor chips includes first and second semiconductor layers. The first and second semiconductor layers each have an element surface and a back surface. An active element is provided on the element surface. The first semiconductor layer and the second semiconductor layer are bonded such that the element surface of the second semiconductor layer faces the element surface of the first semiconductor layer.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: December 17, 2019
    Assignee: Toshiba Memory Corporation
    Inventors: Kazushige Kawasaki, Yoichiro Kurita
  • Patent number: 10497688
    Abstract: A semiconductor device according to an embodiment includes a first memory chip having a first front surface and a first back surface and having a first memory circuit provided on the first front surface side; a second memory chip having a second front surface and a second back surface facing the first front surface, having a second memory circuit provided on the second front surface side, and being electrically connected to the first memory chip; and a logic chip having the first memory chip provided between the logic chip and the second memory chip, having a third front surface and a third back surface, having a logic circuit provided on the third front surface side, and being electrically connected to the first memory chip.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: December 3, 2019
    Assignee: Toshiba Memory Corporation
    Inventors: Satoshi Tsukiyama, Yoichiro Kurita, Hideo Aoki, Kazushige Kawasaki
  • Publication number: 20190295985
    Abstract: A semiconductor device includes a base member; a first stacked body including first semiconductor chips and second semiconductor chips stacked alternately in a first direction crossing a front surface of the base member; and a second stacked body arranged with the first stacked body in a second direction along the front surface of the base member. The second stacked body includes other first semiconductor chips and other second semiconductor chips stacked alternately in the first direction. The first stacked body includes a lowermost first semiconductor chip connected to the base member, and the second stacked body includes a lowermost second semiconductor chip connected to the base member.
    Type: Application
    Filed: September 4, 2018
    Publication date: September 26, 2019
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventor: Kazushige KAWASAKI
  • Publication number: 20190295987
    Abstract: A semiconductor device includes a base member, a stacked body on the base member, a first conductor on the stacked body, a second conductor on a top surface of the base member, and a connection conductor connecting the first conductor and the second conductor. The stacked body includes semiconductor chips stacked and a shared terminal connected to the plurality of semiconductor chips. The plurality of semiconductor chips each includes a functional element on a front surface side thereof and a through electrode extending from a back surface to the front surface side. The shared terminal has a top end positioned at a top surface of the stacked body and a bottom end positioned at a bottom surface of the stacked body. The first conductor is connected to the top end of the shared terminal, and the second conductor is electrically connected to the bottom end of the shared terminal.
    Type: Application
    Filed: September 4, 2018
    Publication date: September 26, 2019
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Satoshi Tsukiyama, Masaru Koyanagi, Mikihiko Ito, Kazushige Kawasaki