Patents by Inventor Takuya ASHIDA

Takuya ASHIDA 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: 11963461
    Abstract: A magnetic domain wall movement element according to the present embodiment includes a first ferromagnetic layer, a nonmagnetic layer, and a second ferromagnetic layer that are laminated in an order from a side close to a substrate. On a cross-section along a lamination direction and a second direction orthogonal to a first direction in which the first ferromagnetic layer extends in a plan view from the lamination direction, a shortest width of the first ferromagnetic layer in the second direction is shorter than a width of the nonmagnetic layer in the second direction.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: April 16, 2024
    Assignee: TDK CORPORATION
    Inventors: Takuya Ashida, Tatsuo Shibata
  • Patent number: 11653573
    Abstract: A magnetic domain wall movement element includes a wiring layer containing a ferromagnetic material, a non-magnetic layer in contact with the first surface of the wiring layer, a first conductive layer connected to the first surface of the wiring layer and containing a ferromagnetic material; and a second conductive layer connected to the wiring layer at a distance from the first conductive layer. A first part of the connection face of the first conductive layer is directly connected to the wiring layer, and a second part of the connection face other than the first part is connected to the wiring layer via the non-magnetic layer.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: May 16, 2023
    Assignee: TDK CORPORATION
    Inventors: Takuya Ashida, Tatsuo Shibata
  • Publication number: 20220359817
    Abstract: A magnetic element according to an embodiment includes a wiring layer extending in a first direction and including a ferromagnetic material and a nonmagnetic layer laminated on the wiring layer in a second direction. The wiring layer includes a side surface inclined with respect to the second direction in a cross section orthogonal to the first direction. The side surface has one or more bending points at which an inclination angle with respect to the second direction becomes discontinuous. An inclination angle of a first inclined surface far from the nonmagnetic layer is smaller than an inclination angle of a second inclined surface close to the nonmagnetic layer in a state in which a first bending point at a position farthest from the nonmagnetic layer among the bending points is interposed between the inclination angles.
    Type: Application
    Filed: July 3, 2020
    Publication date: November 10, 2022
    Applicant: TDK CORPORATION
    Inventors: Takuya ASHIDA, Tatsuo SHIBATA
  • Publication number: 20220231084
    Abstract: A magnetic domain wall moving element includes a magnetic recording layer which extends in a first direction and includes a ferromagnetic material, and a first conductive layer and a second conductive layer which are separately connected to the magnetic recording layer, the first conductive layer includes a ferromagnetic first layer in contact with the magnetic recording layer, the first layer includes a mixing layer at an interface with the magnetic recording layer, a ferromagnetic material and a dissimilar metal are mixed in the mixing layer, and the dissimilar metal is a metal different from each of the ferromagnetic material that mainly constitutes the first layer and the ferromagnetic material that mainly constitutes the magnetic recording layer.
    Type: Application
    Filed: May 12, 2020
    Publication date: July 21, 2022
    Applicant: TDK CORPORATION
    Inventors: Tetsuhito SHINOHARA, Takuya ASHIDA, Tatsuo SHIBATA
  • Patent number: 11211547
    Abstract: A spin-orbit-torque type magnetization rotating element includes: a spin-orbit torque wiring extending in a first direction; and a first ferromagnetic layer laminated on the spin-orbit torque wiring, wherein the spin-orbit torque wiring includes a metal oxide whose electrical conductivity properties exhibit a metallic behavior with respect to temperature, and an oxygen concentration in a region on the first ferromagnetic layer side and an oxygen concentration in a region opposite to the first ferromagnetic layer are asymmetrical with respect to a center of the spin-orbit torque wiring in a thickness direction thereof.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: December 28, 2021
    Assignee: TDK CORPORATION
    Inventors: Takuya Ashida, Yohei Shiokawa, Tomoyuki Sasaki
  • Publication number: 20210376229
    Abstract: A magnetic domain wall movement element according to the present embodiment includes a first ferromagnetic layer, a nonmagnetic layer, and a second ferromagnetic layer that are laminated in an order from a side close to a substrate. On a cross-section along a lamination direction and a second direction orthogonal to a first direction in which the first ferromagnetic layer extends in a plan view from the lamination direction, a shortest width of the first ferromagnetic layer in the second direction is shorter than a width of the nonmagnetic layer in the second direction.
    Type: Application
    Filed: May 26, 2021
    Publication date: December 2, 2021
    Applicant: TDK CORPORATION
    Inventors: Takuya ASHIDA, Tatsuo SHIBATA
  • Patent number: 11017821
    Abstract: A magnetic recording array includes: a plurality of domain wall moving elements; a first wiring which is electrically connected to a reference potential and is electrically connected to at least one domain wall moving element of the plurality of domain wall moving elements; a second wiring which is electrically connected to at least two or more domain wall moving elements of the plurality of domain wall moving elements; a first switching element which is connected between each of the domain wall moving elements and the first wiring; and a second switching element which is connected between each of the domain wall moving elements and the second wiring, wherein an OFF resistance of the first switching element is smaller than an OFF resistance of the second switching element.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: May 25, 2021
    Assignee: TDK CORPORATION
    Inventors: Takuya Ashida, Tatsuo Shibata
  • Publication number: 20210098690
    Abstract: A magnetic domain wall movement element includes a wiring layer containing a ferromagnetic material, a non-magnetic layer in contact with the first surface of the wiring layer, a first conductive layer connected to the first surface of the wiring layer and containing a ferromagnetic material; and a second conductive layer connected to the wiring layer at a distance from the first conductive layer. A first part of the connection face of the first conductive layer is directly connected to the wiring layer, and a second part of the connection face other than the first part is connected to the wiring layer via the non-magnetic layer.
    Type: Application
    Filed: September 30, 2020
    Publication date: April 1, 2021
    Applicant: TDK CORPORATION
    Inventors: Takuya ASHIDA, Tatsuo SHIBATA
  • Patent number: 10923169
    Abstract: A magnetic recording array includes: a plurality of domain wall moving elements; a first wiring which is electrically connected to a reference potential and is electrically connected to at least one domain wall moving element of the plurality of domain wall moving elements; a second wiring which is electrically connected to at least two or more domain wall moving elements of the plurality of domain wall moving elements; a first switching element which is connected between each of the domain wall moving elements and the first wiring; and a second switching element which is connected between each of the domain wall moving elements and the second wiring, wherein an OFF resistance of the first switching element is smaller than an OFF resistance of the second switching element.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: February 16, 2021
    Assignee: TDK CORPORATION
    Inventors: Takuya Ashida, Tatsuo Shibata
  • Patent number: 10916283
    Abstract: A magnetic domain wall movement element includes a first ferromagnetic layer, a magnetic recording layer, a nonmagnetic layer, a first electrode, and a second electrode. The magnetic recording layer includes: a first region which overlaps with the first electrode and the first ferromagnetic layer in a first direction; a second region which overlaps with the second electrode and the first ferromagnetic layer in the first direction; and a third region which is located between the first region and the second region. An area of a first section in the first region facing the first electrode is larger than an area of a second section in the second region facing the second electrode. The first ferromagnetic layer overlaps with a part of the first electrode and a part of the second electrode in the first direction.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: February 9, 2021
    Assignee: TDK CORPORATION
    Inventors: Takuya Ashida, Tomoyuki Sasaki, Tatsuo Shibata
  • Publication number: 20200273511
    Abstract: A magnetic domain wall movement element includes a first ferromagnetic layer, a magnetic recording layer, a nonmagnetic layer, a first electrode, and a second electrode. The magnetic recording layer includes: a first region which overlaps with the first electrode and the first ferromagnetic layer in a first direction; a second region which overlaps with the second electrode and the first ferromagnetic layer in the first direction; and a third region which is located between the first region and the second region. An area of a first section in the first region facing the first electrode is larger than an area of a second section in the second region facing the second electrode. The first ferromagnetic layer overlaps with a part of the first electrode and a part of the second electrode in the first direction.
    Type: Application
    Filed: February 20, 2020
    Publication date: August 27, 2020
    Applicant: TDK CORPORATION
    Inventors: Takuya ASHIDA, Tomoyuki SASAKI, Tatsuo SHIBATA
  • Publication number: 20200265875
    Abstract: A magnetic recording array includes: a plurality of domain wall moving elements; a first wiring which is electrically connected to a reference potential and is electrically connected to at least one domain wall moving element of the plurality of domain wall moving elements; a second wiring which is electrically connected to at least two or more domain wall moving elements of the plurality of domain wall moving elements; a first switching element which is connected between each of the domain wall moving elements and the first wiring; and a second switching element which is connected between each of the domain wall moving elements and the second wiring, wherein an OFF resistance of the first switching element is smaller than an OFF resistance of the second switching element.
    Type: Application
    Filed: May 5, 2020
    Publication date: August 20, 2020
    Applicant: TDK CORPORATION
    Inventors: Takuya ASHIDA, Tatsuo SHIBATA
  • Publication number: 20200258559
    Abstract: A magnetic recording array includes: a plurality of domain wall moving elements; a first wiring which is electrically connected to a reference potential and is electrically connected to at least one domain wall moving element of the plurality of domain wall moving elements; a second wiring which is electrically connected to at least two or more domain wall moving elements of the plurality of domain wall moving elements; a first switching element which is connected between each of the domain wall moving elements and the first wiring; and a second switching element which is connected between each of the domain wall moving elements and the second wiring, wherein an OFF resistance of the first switching element is smaller than an OFF resistance of the second switching element.
    Type: Application
    Filed: April 27, 2020
    Publication date: August 13, 2020
    Applicant: TDK CORPORATION
    Inventors: Takuya ASHIDA, Tatsuo SHIBATA
  • Patent number: 10685683
    Abstract: A magnetic recording array includes: a plurality of domain wall moving elements; a first wiring which is electrically connected to a reference potential and is electrically connected to at least one domain wall moving element of the plurality of domain wall moving elements; a second wiring which is electrically connected to at least two or more domain wall moving elements of the plurality of domain wall moving elements; a first switching element which is connected between each of the domain wall moving elements and the first wiring; and a second switching element which is connected between each of the domain wall moving elements and the second wiring, wherein an OFF resistance of the first switching element is smaller than an OFF resistance of the second switching element.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: June 16, 2020
    Assignee: TDK CORPORATION
    Inventors: Takuya Ashida, Tatsuo Shibata
  • Publication number: 20200136017
    Abstract: A spin-orbit-torque type magnetization rotating element includes: a spin-orbit torque wiring extending in a first direction; and a first ferromagnetic layer laminated on the spin-orbit torque wiring, wherein the spin-orbit torque wiring includes a metal oxide whose electrical conductivity properties exhibit a metallic behavior with respect to temperature, and an oxygen concentration in a region on the first ferromagnetic layer side and an oxygen concentration in a region opposite to the first ferromagnetic layer are asymmetrical with respect to a center of the spin-orbit torque wiring in a thickness direction thereof.
    Type: Application
    Filed: February 6, 2019
    Publication date: April 30, 2020
    Applicant: TDK CORPORATION
    Inventors: Takuya ASHIDA, Yohei SHIOKAWA, Tomoyuki SASAKI
  • Publication number: 20200105310
    Abstract: A magnetic recording array includes: a plurality of domain wall moving elements; a first wiring which is electrically connected to a reference potential and is electrically connected to at least one domain wall moving element of the plurality of domain wall moving elements; a second wiring which is electrically connected to at least two or more domain wall moving elements of the plurality of domain wall moving elements; a first switching element which is connected between each of the domain wall moving elements and the first wiring; and a second switching element which is connected between each of the domain wall moving elements and the second wiring, wherein an OFF resistance of the first switching element is smaller than an OFF resistance of the second switching element.
    Type: Application
    Filed: March 5, 2019
    Publication date: April 2, 2020
    Applicant: TDK CORPORATION
    Inventors: Takuya ASHIDA, Tatsuo SHIBATA