公开(公告)号：US20180287037A1

公开(公告)日：2018-10-04

申请号：US15924828

申请日：2018-03-19

Applicant: TDK CORPORATION

Inventor： Kazuya MAEKAWA ,  Makoto SHIBATA ,  Katsuyuki NAKADA ,  Yohei SHIOKAWA ,  Kazuumi INUBUSHI

IPC: H01L35/32 ,  H01L35/22 ,  H01L35/20

Abstract: A laminate includes, on a substrate, a first buffer layer substantially made of zirconium oxide or stabilized zirconia, a second buffer layer substantially made of yttrium oxide, a metal layer substantially made of at least one among platinum, iridium, palladium, rhodium, vanadium, chromium, iron, molybdenum, tungsten, aluminum, silver, gold, copper, and nickel, and a magnesium oxide layer substantially made of magnesium oxide, in this order.

公开(公告)号：US20180254773A1

公开(公告)日：2018-09-06

申请号：US15891759

申请日：2018-02-08

Applicant: TDK CORPORATION

Inventor： Jiro YOSHINARI ,  Tomoyuki SASAKI ,  Yohei SHIOKAWA

IPC: H03K3/84 ,  H01F10/32 ,  H01L43/08 ,  H01L43/04 ,  G06F7/58

CPC classification number: H03K3/84 ,  G06F7/588 ,  G06N3/0635 ,  G06N10/00 ,  H01F10/3254 ,  H01F10/3286 ,  H01F10/329 ,  H01L27/22 ,  H01L43/04 ,  H01L43/08 ,  H04L9/0852

Abstract: A random number generator capable of generating a natural random number using a spin-orbit torque (SOT) is provided. The random number generator includes a ferromagnetic metal layer and a spin-orbit torque wiring extending in a first direction crossing a lamination direction of the ferromagnetic metal layer and being joined to the ferromagnetic metal layer, wherein the direction of spins injected from the spin-orbit torque wiring into the ferromagnetic metal layer and an easy magnetization direction of the ferromagnetic metal layer intersect each other.

公开(公告)号：US20240407176A1

公开(公告)日：2024-12-05

申请号：US18712336

申请日：2021-11-24

Applicant: TDK Corporation

Inventor： Yohei SHIOKAWA ,  Yugo ISHITANI ,  Kosuke HAMANAKA

IPC: H10B61/00 ,  H10N50/10 ,  H10N50/85

Abstract: A magnetization rotation element includes a spin-orbit torque wiring and a first ferromagnetic layer connected to the spin-orbit torque wiring, wherein the spin-orbit torque wiring has a first layer and a second layer, the first layer is closer to the first ferromagnetic layer than the second layer, the first layer has a negative spin Hall angle, and the second layer has a positive spin Hall angle.

公开(公告)号：US20240008370A1

公开(公告)日：2024-01-04

申请号：US18367135

申请日：2023-09-12

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA

IPC: H10N52/00 ,  G11C11/18 ,  H10B61/00 ,  H10N50/01 ,  H10N50/10 ,  H10N50/85 ,  H10N52/80 ,  G11C11/16

CPC classification number: H10N52/101 ,  G11C11/18 ,  H10B61/22 ,  H10N50/01 ,  H10N50/10 ,  H10N50/85 ,  H10N52/80 ,  G11C11/161 ,  G11C11/1659 ,  G11C11/1673 ,  G11C11/1675

Abstract: A spin-orbit torque type magnetoresistance effect element including a magnetoresistance effect element having a first ferromagnetic metal layer with a fixed magnetization direction, a second ferromagnetic metal layer with a varying magnetization direction, and a non-magnetic layer sandwiched between the first ferromagnetic metal layer and the second ferromagnetic metal layer; and spin-orbit torque wiring that extends in a first direction intersecting with a stacking direction of the magnetoresistance effect element and that is joined to the second ferromagnetic metal layer; wherein the magnetization of the second ferromagnetic metal layer is oriented in the stacking direction of the magnetoresistance effect element; and the second ferromagnetic metal layer has shape anisotropy, such that a length along the first direction is greater than a length along a second direction orthogonal to the first direction and to the stacking direction.

公开(公告)号：US20230200259A1

公开(公告)日：2023-06-22

申请号：US18113747

申请日：2023-02-24

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA

IPC: H10N52/80 ,  H10B61/00 ,  H10N50/85 ,  H10N52/00 ,  H10N52/01

CPC classification number: H10N52/80 ,  H10B61/00 ,  H10N50/85 ,  H10N52/00 ,  H10N52/01

Abstract: A spin-current magnetization rotational element includes a spin orbit torque wiring extending in a first direction and a first ferromagnetic layer disposed in a second direction intersecting the first direction of the spin orbit torque wiring, the spin orbit torque wiring having a first surface positioned on the side where the first ferromagnetic layer is disposed, and a second surface opposite to the first surface, and the spin orbit torque wiring has a second region on the first surface outside a first region in which the first ferromagnetic layer is disposed, the second region being recessed from the first region to the second surface side.

公开(公告)号：US20210305498A1

公开(公告)日：2021-09-30

申请号：US17345084

申请日：2021-06-11

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA ,  Eiji KOMURA ,  Keita SUDA

IPC: H01L43/10 ,  G11C11/18 ,  G11C11/16 ,  H01L43/08 ,  H01L43/06

Abstract: Provided is a magnetoresistance effect element that suppresses re-adhesion of impurities during preparation and allows a write current to easily flow. The magnetoresistance effect element includes a first ferromagnetic layer, a second ferromagnetic layer; and a nonmagnetic layer interposed between the first ferromagnetic layer and the second ferromagnetic layer. In the magnetoresistance effect element, the nonmagnetic layer is a tunnel barrier layer constituted by an insulator, a side surface of the first ferromagnetic layer, a side surface of the second ferromagnetic layer and a side surface of the nonmagnetic layer form a continuous inclined surface in any side surface, and a thickness of inside the nonmagnetic layer is thicker than a thickness of outside the nonmagnetic layer.

公开(公告)号：US20210134503A1

公开(公告)日：2021-05-06

申请号：US17123514

申请日：2020-12-16

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA

IPC: H01F10/32 ,  G01R33/09 ,  H01L43/04 ,  H01L43/14 ,  H01L43/06 ,  G11C11/16 ,  H01L43/12 ,  H01L43/08 ,  H01L43/10

Abstract: A spin-orbit-torque magnetization rotational element includes: a spin-orbit torque wiring layer which extends in an X direction; and a first ferromagnetic layer which is laminated on the spin-orbit torque wiring layer, wherein the first ferromagnetic layer has shape anisotropy and has a major axis in a Y direction orthogonal to the X direction on a plane in which the spin-orbit torque wiring layer extends, and wherein the easy axis of magnetization of the first ferromagnetic layer is inclined with respect to the X direction and the Y direction orthogonal to the X direction on a plane in which the spin-orbit torque wiring layer extends.

公开(公告)号：US20200266336A1

公开(公告)日：2020-08-20

申请号：US16349537

申请日：2018-10-30

Applicant: TDK CORPORATION

Inventor： Katsuyuki NAKADA ,  Yohei SHIOKAWA

IPC: H01L43/02 ,  H01L27/22

Abstract: This spin-orbit-torque 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 compound represented by XYZ or X2YZ with respect to a stoichiometric composition.

公开(公告)号：US20200160900A1

公开(公告)日：2020-05-21

申请号：US16751318

申请日：2020-01-24

Applicant: TDK CORPORATION

Inventor： Yohei SHIOKAWA ,  Tomoyuki SASAKI

IPC: G11C11/16 ,  H01L43/08 ,  H01L43/10 ,  H01L43/12 ,  G01R33/09 ,  H01L43/02

Abstract: A spin current magnetization rotational element including a first ferromagnetic metal layer in which a magnetization direction is variable, and a spin-orbit torque wiring that extends in a second direction intersecting a first direction that is a plane-orthogonal direction of the first ferromagnetic metal layer, and is joined to the first ferromagnetic metal layer. The first ferromagnetic metal layer has a lamination structure including a plurality of ferromagnetic constituent layers and a plurality of nonmagnetic constituent layers which are respectively interposed between the ferromagnetic constituent layers adjacent to each other. At least one ferromagnetic constituent layer among the plurality of ferromagnetic constituent layers has a film thickness different from a film thickness of the other ferromagnetic constituent layers, and/or at least one nonmagnetic constituent layer among the plurality of nonmagnetic constituent layers has a film thickness different from a film thickness of the other nonmagnetic constituent layers.

公开(公告)号：US20200083430A1

公开(公告)日：2020-03-12

申请号：US16288317

申请日：2019-02-28

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA ,  Minoru SANUKI

IPC: H01L43/02 ,  H01L43/08 ,  H01L43/10 ,  H01L27/22

Abstract: Provided are a spin-orbit-torque magnetization rotational element and a spin-orbit-torque magnetoresistance effect element capable of easily rotating or reversing magnetization of a ferromagnetic layer. The spin-orbit-torque magnetization rotational element includes spin-orbit torque wiring and a first ferromagnetic layer laminated on the spin-orbit torque wiring in a first direction, wherein the spin-orbit torque wiring includes a first region extending in a second direction, a second region extending in a third direction different from the second direction, and an intersection region where the first region and the second region intersect, and wherein the first ferromagnetic layer and the intersection region at least partially overlap in a plan view from the first direction.