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).
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Patent number: 11963461Abstract: 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: GrantFiled: May 26, 2021Date of Patent: April 16, 2024Assignee: TDK CORPORATIONInventors: Takuya Ashida, Tatsuo Shibata
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Patent number: 11653573Abstract: 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: GrantFiled: September 30, 2020Date of Patent: May 16, 2023Assignee: TDK CORPORATIONInventors: Takuya Ashida, Tatsuo Shibata
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Publication number: 20220359817Abstract: 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: ApplicationFiled: July 3, 2020Publication date: November 10, 2022Applicant: TDK CORPORATIONInventors: Takuya ASHIDA, Tatsuo SHIBATA
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Publication number: 20220231084Abstract: 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: ApplicationFiled: May 12, 2020Publication date: July 21, 2022Applicant: TDK CORPORATIONInventors: Tetsuhito SHINOHARA, Takuya ASHIDA, Tatsuo SHIBATA
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Patent number: 11211547Abstract: 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: GrantFiled: February 6, 2019Date of Patent: December 28, 2021Assignee: TDK CORPORATIONInventors: Takuya Ashida, Yohei Shiokawa, Tomoyuki Sasaki
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Publication number: 20210376229Abstract: 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: ApplicationFiled: May 26, 2021Publication date: December 2, 2021Applicant: TDK CORPORATIONInventors: Takuya ASHIDA, Tatsuo SHIBATA
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Patent number: 11017821Abstract: 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: GrantFiled: May 5, 2020Date of Patent: May 25, 2021Assignee: TDK CORPORATIONInventors: Takuya Ashida, Tatsuo Shibata
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Publication number: 20210098690Abstract: 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: ApplicationFiled: September 30, 2020Publication date: April 1, 2021Applicant: TDK CORPORATIONInventors: Takuya ASHIDA, Tatsuo SHIBATA
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Patent number: 10923169Abstract: 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: GrantFiled: April 27, 2020Date of Patent: February 16, 2021Assignee: TDK CORPORATIONInventors: Takuya Ashida, Tatsuo Shibata
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Patent number: 10916283Abstract: 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: GrantFiled: February 20, 2020Date of Patent: February 9, 2021Assignee: TDK CORPORATIONInventors: Takuya Ashida, Tomoyuki Sasaki, Tatsuo Shibata
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Publication number: 20200273511Abstract: 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: ApplicationFiled: February 20, 2020Publication date: August 27, 2020Applicant: TDK CORPORATIONInventors: Takuya ASHIDA, Tomoyuki SASAKI, Tatsuo SHIBATA
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Publication number: 20200265875Abstract: 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: ApplicationFiled: May 5, 2020Publication date: August 20, 2020Applicant: TDK CORPORATIONInventors: Takuya ASHIDA, Tatsuo SHIBATA
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Publication number: 20200258559Abstract: 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: ApplicationFiled: April 27, 2020Publication date: August 13, 2020Applicant: TDK CORPORATIONInventors: Takuya ASHIDA, Tatsuo SHIBATA
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Patent number: 10685683Abstract: 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: GrantFiled: March 5, 2019Date of Patent: June 16, 2020Assignee: TDK CORPORATIONInventors: Takuya Ashida, Tatsuo Shibata
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Publication number: 20200136017Abstract: 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: ApplicationFiled: February 6, 2019Publication date: April 30, 2020Applicant: TDK CORPORATIONInventors: Takuya ASHIDA, Yohei SHIOKAWA, Tomoyuki SASAKI
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Publication number: 20200105310Abstract: 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: ApplicationFiled: March 5, 2019Publication date: April 2, 2020Applicant: TDK CORPORATIONInventors: Takuya ASHIDA, Tatsuo SHIBATA