公开(公告)号：US20240329323A1

公开(公告)日：2024-10-03

申请号：US18429669

申请日：2024-02-01

Applicant: TDK CORPORATION

Inventor： Atsushi SHIMURA ,  Yasuhiro TAKAGI ,  Hiroki HARA ,  Jiro YOSHINARI

IPC: G02B6/35 ,  G02B6/27

CPC classification number: G02B6/354 ,  G02B6/272

Abstract: This optical coupler includes a plurality of light input ports to which a plurality of visible light beams can be input, a light output port capable of coupling all of the plurality of visible light beams and outputting coupled light, an optical coupling portion to which a light-input-side optical waveguide and a light-output-side optical waveguide are connected, and at least one high-order mode removal portion provided to remove a high mode with respect to each of the plurality of visible light beams. The optical coupling portion and each high-order mode removal portion are arranged so that each of the plurality of visible light beams passes through only a high-order mode removal portion for visible light or passes through only the high-order mode removal portion for the visible light and a high-order mode removal portion for visible light having a shorter wavelength than the visible light.

公开(公告)号：US20190108865A1

公开(公告)日：2019-04-11

申请号：US16120960

申请日：2018-09-04

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA ,  Jiro YOSHINARI

IPC: G11C11/14 ,  G11C11/16 ,  H01L43/08 ,  H01L43/12 ,  G01R33/09

Abstract: A magnetoresistance effect element has a structure in which a first ferromagnetic layer, a non-magnetic layer, and a second ferromagnetic layer are subsequently laminated and outer circumferential portions of the first ferromagnetic layer, the non-magnetic layer, and the second ferromagnetic layer are covered with a first insulating film which contains silicon nitride as a main component and contains further boron nitride or aluminum nitride.

公开(公告)号：US20240329437A1

公开(公告)日：2024-10-03

申请号：US18409030

申请日：2024-01-10

Applicant: TDK CORPORATION

Inventor： Hiroki HARA ,  Yasuhiro TAKAGI ,  Atsushi SHIMURA ,  Jiro YOSHINARI

IPC: G02F1/035 ,  G02B27/01 ,  G02F1/03 ,  G02F1/21 ,  G02F1/225

CPC classification number: G02F1/035 ,  G02B27/0172 ,  G02F1/0316 ,  G02F1/212 ,  G02F1/225 ,  G02B2027/0178

Abstract: An optical modulator is a Mach-Zehnder-type optical modulator having a substrate and an optical waveguide layer including a lithium niobate film formed on the substrate. The optical waveguide layer includes a plurality of flat portions and n ridge portions arranged between the flat portions to be adjacent, where n is two or more. Each of the n ridge portions includes a main waveguide to which visible light is input, a first multimode interference waveguide through which the main waveguide is branched into a first and a second optical branch waveguide, and a second multimode interference waveguide through which the first and the second optical branch waveguide are coupled to form a coupling waveguide. Visible light beams having different wavelengths are input to the n ridge portions. The first multimode interference waveguide and the second multimode interference waveguide have shorter lengths when input light having a longer wavelength is transmitted.

公开(公告)号：US20190258457A1

公开(公告)日：2019-08-22

申请号：US16224899

申请日：2018-12-19

Applicant: TDK CORPORATION

Inventor： Jiro YOSHINARI ,  Tatsuo SHIBATA

IPC: G06F7/58 ,  H01L43/02 ,  H01L43/10

Abstract: A random number generator includes a random number generation unit having a first ferromagnetic layer and a nonmagnetic insulating layer laminated on one surface of the first ferromagnetic layer, a voltage application unit which is connected in the lamination direction of the first ferromagnetic layer and the insulating layer and is configured to apply a voltage in the lamination direction of the first ferromagnetic layer and the insulating layer, and a control unit which is connected to the voltage application unit and is configured to determine a time for which a voltage is applied to the first ferromagnetic layer depending on the direction of magnetization of the first ferromagnetic layer precessing by applying the voltage.

公开(公告)号：US20190074043A1

公开(公告)日：2019-03-07

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 ,  H01L43/06 ,  H01L43/08 ,  H01L43/10 ,  H01L43/14

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：US20240126015A1

公开(公告)日：2024-04-18

申请号：US18377602

申请日：2023-10-06

Applicant: TDK CORPORATION

Inventor： Hajime UTSUNOMIYA ,  Yasuhiro TAKAGI ,  Hiroki HARA ,  Atsushi SHIMURA ,  Jiro YOSHINARI ,  Takashi KIKUKAWA ,  Tsuyoshi KOMAKI ,  Hideaki FUKUZAWA

IPC: G02B6/293

CPC classification number: G02B6/29344

Abstract: This optical coupler for coupling a plurality of visible light beams having different wavelengths includes: a substrate made of a material different from lithium niobate; and an optical coupling function layer formed on a main surface of the substrate. The optical coupling function layer includes: two multimode-interference-type optical coupling parts; optical-input-side waveguides and an optical-output-side waveguide connected to one multimode-interference-type optical coupling part, and optical-input-side waveguides and an optical-output-side waveguide connected to the other multimode-interference-type optical coupling part. The multimode-interference-type optical coupling parts, the optical-input-side waveguides, and the optical-output-side waveguides are made of a lithium niobate film.

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：US20190305763A1

公开(公告)日：2019-10-03

申请号：US16414838

申请日：2019-05-17

Applicant: TDK CORPORATION

Inventor： Jiro YOSHINARI ,  Tomoyuki SASAKI ,  Yohei SHIOKAWA

IPC: H03K3/84 ,  H01L43/08 ,  H01L43/04 ,  H01F10/32 ,  H04L9/08 ,  G06F7/58

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.