公开(公告)号：US20240420785A1

公开(公告)日：2024-12-19

申请号：US18702662

申请日：2021-10-21

Applicant: TDK CORPORATION

Inventor： Shogo YONEMURA ,  Tatsuo SHIBATA ,  Minoru OTA

IPC: G11C19/08 ,  G11C11/16 ,  H10B61/00 ,  H10N50/10 ,  H10N50/80

Abstract: A magnetic domain wall motion element includes a wiring layer including a first ferromagnetic layer and configured to extend in a first direction, a second ferromagnetic layer, and a spacer layer sandwiched between the wiring layer and the second ferromagnetic layer. In any cross section of the wiring layer taken along a plane perpendicular to the first direction, a first thickness of the wiring layer at a center in a width direction is thinner than a second thickness of the wiring layer at a first outer. peripheral portion outside the center in the width direction.

公开(公告)号：US20240074325A1

公开(公告)日：2024-02-29

申请号：US17899131

申请日：2022-08-30

Applicant: TDK CORPORATION

Inventor： Shogo YONEMURA ,  Tatsuo SHIBATA ,  Shogo YAMADA

IPC: H01L43/02 ,  H01L27/22 ,  H01L43/10 ,  H01L43/12

CPC classification number: H01L43/02 ,  H01L27/222 ,  H01L43/10 ,  H01L43/12

Abstract: A magnetic domain wall moving element includes a first ferromagnetic layer, non-magnetic layer, second ferromagnetic layer, first magnetization fixed part, second magnetization fixed part, first surface layer and second surface layer. The first and second ferromagnetic layer sandwich the non-magnetic layer, the second ferromagnetic layer has a region having a magnetic domain wall formed therein, the first magnetization fixed part contacts second ferromagnetic layer, the second magnetization fixed part contacts second ferromagnetic layer at a position different from that of the first magnetization fixed part, the first is thicker than the second magnetization fixed part, the first surface layer contacts the first magnetization fixed part's first surface, the second surface layer contacts the second magnetization fixed part's first surface, and a constituent atom of a portion of the first surface layer in contact with the first magnetization fixed part are different from a constituent atom of the second surface layer.

公开(公告)号：US20220359817A1

公开(公告)日：2022-11-10

申请号：US17623540

申请日：2020-07-03

Applicant: TDK CORPORATION

Inventor： Takuya ASHIDA ,  Tatsuo SHIBATA

IPC: H01L43/04 ,  H01L27/22 ,  H01L43/06

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.

公开(公告)号：US20220231084A1

公开(公告)日：2022-07-21

申请号：US17610339

申请日：2020-05-12

Applicant: TDK CORPORATION

Inventor： Tetsuhito SHINOHARA ,  Takuya ASHIDA ,  Tatsuo SHIBATA

IPC: H01L27/22 ,  H01L43/02 ,  H01L43/10 ,  G11C11/16

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.

公开(公告)号：US20220216394A1

公开(公告)日：2022-07-07

申请号：US17141347

申请日：2021-01-05

Applicant: TDK CORPORATION

Inventor： Minoru OTA ,  Tatsuo SHIBATA ,  Minoru SANUKI

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

Abstract: A magnetic domain wall moving element according to an embodiment includes: a magnetic recording layer, a ferromagnetic layer, and a non-magnetic layer arranged between the magnetic recording layer and the ferromagnetic layer, wherein the ferromagnetic layer contains an additive element dispersed therein, and the additive element is one or more of H, He, Ne, Ar, Kr, Xe, N, C, Ag, Cu, Hg, Au, Pb, Zn, and Bi.

公开(公告)号：US20220190233A1

公开(公告)日：2022-06-16

申请号：US17543314

申请日：2021-12-06

Applicant: TDK CORPORATION

Inventor： Shogo YONEMURA ,  Tomoyuki SASAKI ,  Tatsuo SHIBATA

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

Abstract: A magnetic domain wall movement element includes: a laminate including a ferromagnetic layer, a non-magnetic layer, and a magnetic domain wall movement layer; a first conductive layer; and a first surface layer laminated above a substrate in order from the substrate, wherein the non-magnetic layer is sandwiched between the ferromagnetic layer and the magnetic domain wall movement layer, wherein the first conductive layer is connected to an upper surface of the magnetic domain wall movement layer, wherein the first surface layer contacts at least a part of an upper surface of the magnetic domain wall movement layer, and wherein the resistivity of the first surface layer is higher than the resistivity of the magnetic domain wall movement layer.

公开(公告)号：US20220092396A1

公开(公告)日：2022-03-24

申请号：US17420915

申请日：2019-01-09

Applicant: TDK CORPORATION

Inventor： Kuniyasu ITO ,  Tatsuo SHIBATA ,  Yukio TERASAKI

IPC: G06N3/063 ,  G06F7/523 ,  G06F7/50

Abstract: A product-sum operation device including: product operation units generating output signals by multiplying input signals corresponding to input values; a current detection unit executing a current detecting process in which a current output from the product operation units with a predetermined time delay from input of the input signal and a current output from the product operation units at an interval thereafter are detected in a time span from a first transient response to before occurrence of a second transient response, the first transient response due to charging to a parasitic capacitance of the product operation units by input of the input signal and the second transient response being due to discharging from the parasitic capacitance of the product operation units by input of the input signal; and a sum operation unit calculating a value relating to a total sum of the output signals based on currents detected.

公开(公告)号：US20200342298A1

公开(公告)日：2020-10-29

申请号：US16758883

申请日：2018-12-12

Applicant: TDK CORPORATION

Inventor： Tatsuo SHIBATA

IPC: G06N3/063 ,  G06F9/30

Abstract: A product-sum operation device includes a product operator and a sum operator. The product operator includes a plurality of variable-input product operation elements and a plurality of fixed-input product operation elements. Each of the plurality of variable-input product operation elements and the plurality of fixed-input product operation elements and is a resistance change element. The product-sum operation device includes variable input units and that input a variable signal to a plurality of variable-input product operation elements and fixed input units and that input a determined signal to the plurality of fixed-input product operation elements and in synchronization with the variable signal. The sum operator includes an output detector that determines the sum of outputs from the plurality of variable-input product operation elements and outputs from the plurality of fixed-input product operation elements.

公开(公告)号：US20200327400A1

公开(公告)日：2020-10-15

申请号：US16759080

申请日：2018-12-12

Applicant: TDK CORPORATION

Inventor： Tatsuo SHIBATA ,  Tomoyuki SASAKI

IPC: G06N3/063 ,  G06F7/544 ,  G06F7/523 ,  G06F7/50 ,  G06F7/38

Abstract: The product-sum operation device includes a product operator and a sum operator. The product operator includes a plurality of product operation elements, and an alternative element that, when any of the plurality of product operation elements has malfunctioned, is used instead of the malfunctioning product operation element. Each of the plurality of product operation elements and the alternative element is a resistance change element. The sum operator includes an output detector which detects a sum of outputs from the plurality of product operation elements when the alternative element is not used.

公开(公告)号：US20200258559A1

公开(公告)日：2020-08-13

申请号：US16859096

申请日：2020-04-27

Applicant: TDK CORPORATION

Inventor： Takuya ASHIDA ,  Tatsuo SHIBATA

IPC: G11C11/16 ,  H01L43/02 ,  H01L27/22 ,  H01F10/32

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.