公开(公告)号：US10340901B2

公开(公告)日：2019-07-02

申请号：US15891759

申请日：2018-02-08

Applicant: TDK CORPORATION

Inventor： Jiro Yoshinari ,  Tomoyuki Sasaki ,  Yohei Shiokawa

IPC: G11C11/00 ,  G11C11/06 ,  H03K3/84 ,  H01F10/32 ,  H01L43/08 ,  G06F7/58 ,  H01L43/04 ,  H04L9/08 ,  H01L27/22 ,  G06N3/063 ,  G06N10/00

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：US20240219642A1

公开(公告)日：2024-07-04

申请号：US18539873

申请日：2023-12-14

Applicant: TDK CORPORATION

Inventor： Yasuhiro TAKAGI ,  Hiroki Hara ,  Atsushi Shimura ,  Hajime Utsunomiya ,  Jiro Yoshinari

IPC: G02B6/293

CPC classification number: G02B6/29344

Abstract: An optical coupler includes: light input ports on a first side surface; monitoring light output ports on a second side surface; one light output port on a third side surface; and multimode-interference-type optical coupling parts, a first multimode-interference coupling part is connected to a first light-input-side waveguide on the input side, and to a first monitoring-light-output-side waveguide and a first connecting waveguide on the output side, the second multimode-interference coupling part is connected to a second light-input-side waveguide and the first connecting waveguide on the input side, and to a second monitoring-light-output-side waveguide and a second connecting waveguide on the output side, and the third multimode-interference coupling part is connected to a third light-input-side waveguide and the second connecting waveguide on the input side, and connected to a third monitoring-light-output-side waveguide and a light-output-port-connected waveguide on the output side, and the monitoring-light-output-side waveguides are free of an intersection.

公开(公告)号：US10574215B2

公开(公告)日：2020-02-25

申请号：US16414838

申请日：2019-05-17

Applicant: TDK CORPORATION

Inventor： Jiro Yoshinari ,  Tomoyuki Sasaki ,  Yohei Shiokawa

IPC: G11C11/06 ,  G11C11/00 ,  H03K3/84 ,  H01F10/32 ,  H01L43/08 ,  G06F7/58 ,  H01L43/04 ,  H04L9/08 ,  H01L27/22 ,  G06N3/063 ,  G06N10/00

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：US20250138349A1

公开(公告)日：2025-05-01

申请号：US18883037

申请日：2024-09-12

Applicant: TDK Corporation

Inventor： Yasuhiro TAKAGI ,  Hiroki Hara ,  Atsushi Shimura ,  Jiro Yoshinari

IPC: G02F1/035 ,  G02F1/01

Abstract: A core layer of an optical element includes a second conversion portion that converts a polarization mode of light from a TE1 mode to a TE0 mode. The second conversion portion includes: a splitting portion that splits the light in the TE1 mode incident from the first conversion portion into first split light in the TE0 mode and second split light in the TE0 mode which are in opposite phases; a coupling portion that couples the first split light that has propagated through a first branch waveguide and the second split light that has propagated through a second branch waveguide to emit the light in the TE0 mode; and a phase adjustment unit that adjusts a phase difference between the first split light and the second split light. The first branch waveguide and the second branch waveguide are arranged in a second direction.

公开(公告)号：US10943631B2

公开(公告)日：2021-03-09

申请号：US16114692

申请日：2018-08-28

Applicant: TDK CORPORATION

Inventor： Tomoyuki Sasaki ,  Yohei Shiokawa ,  Jiro Yoshinari

IPC: G11C11/16 ,  G01R33/09 ,  H01L43/04 ,  H01L43/08 ,  H01L43/10 ,  H01L43/14 ,  H01L43/06 ,  G11C11/18 ,  H01L43/02

Abstract: A spin current magnetization reversing element (100) includes a spin orbit torque wiring layer (101) that extends in one direction, a first ferromagnetic layer (102) that is formed on a first surface (101a) of the spin orbit torque wiring layer, and a first insulating layer (103) that is formed on a second surface (101b) on a side opposite to the first ferromagnetic layer (102) side on the surface of the spin orbit torque wiring layer. The first insulating layer (103) contains boron nitride or aluminum nitride.

公开(公告)号：US20250138348A1

公开(公告)日：2025-05-01

申请号：US18882916

申请日：2024-09-12

Applicant: TDK Corporation

Inventor： Yasuhiro TAKAGI ,  Hiroki Hara ,  Atsushi Shimura ,  Jiro Yoshinari

IPC: G02F1/035 ,  G02F1/01

Abstract: In a first region of a first conversion portion, a length of an upper tapered portion in a third direction continuously increases from a first length at a first end to a second length toward an intermediate position, and a length of a lower tapered portion in the third direction continuously increases from the first length at the first end to a third length, which is longer than the second length, toward the intermediate position. In a second region of the first conversion portion, a length of the upper tapered portion in the third direction continuously increases from the second length at the intermediate position to a fourth length, which is shorter than the third length, toward a second end, and a length of the lower tapered portion in the third direction continuously decreases from the third length at the intermediate position to the fourth length toward the second end.