Patents Assigned to TDK Corporation
  • Patent number: 10401888
    Abstract: A low-dropout voltage regulator (LDO) apparatus is disclosed. In an embodiment, the LDO apparatus includes a voltage input connectable to a power supply, an error amplifier coupled to the voltage input and configured to receive a reference signal and a feedback signal and to generate an output control signal dependent on the reference signal and the feedback signal, and a pass transistor coupled to the error amplifier and configured to receive the output control signal of the error amplifier and to provide an output current dependent on the output control signal. The LDO apparatus further includes a detection circuit coupled to the voltage input and configured to provide an output signal on its output and a bias generator coupled to the output of the detection circuit and configured to provide a bias current on a bias input of the current adjusting circuit of the error amplifier.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: September 3, 2019
    Assignee: TDK Corporation
    Inventors: Lei Zou, Gino Rocca
  • Publication number: 20190267542
    Abstract: A spin-orbit-torque magnetization rotational element includes: a spin-orbit-torque wiring which extends in a first direction; and a first ferromagnetic layer which is laminated in a second direction intersecting the spin-orbit-torque wiring, wherein the spin-orbit-torque wiring includes a convex portion which protrudes in the second direction in relation to a first surface on the side of the first ferromagnetic layer at a connecting part between the spin-orbit-torque wiring and the first ferromagnetic layer.
    Type: Application
    Filed: February 22, 2019
    Publication date: August 29, 2019
    Applicant: TDK CORPORATION
    Inventors: Eiji KOMURA, Yohei SHIOKAWA
  • Publication number: 20190267167
    Abstract: A ferrite sintered magnet contains a main phase formed of ferrite having a hexagonal magnetoplumbite type crystalline structure; a first subphase containing La, Ca, and Fe, in which an atomic ratio of La is higher than that of the main phase, and the atomic ratio of La is higher than an atomic ratio of Ca; and a second subphase containing La, Ca, Si, B, and Fe, in which an atomic ratio of Ca is higher than an atomic ratio of La, an atomic ratio of B is higher than an atomic ratio of Fe, and the atomic ratio of Fe is lower than that of the main phase. An area ratio of the second subphase on a cross-sectional surface of the ferrite sintered magnet is greater than or equal to 1%.
    Type: Application
    Filed: February 22, 2019
    Publication date: August 29, 2019
    Applicant: TDK Corporation
    Inventors: Junnichi NAGAOKA, Hiroyuki ONO, Yuichi SUGAWARA
  • Publication number: 20190267330
    Abstract: A circuit module 2 comprises: a wiring structure 4; an electronic component 6a, 6b arranged on the upper surface of the wiring structure 4; an insulating resin layer 8 which is provided on the upper surface of the wiring structure 4 and in which the electronic component 6a, 6b is embedded; and a metal layer 10 provided on a side surface S1 of the insulating resin layer 8 and a side surface S2 of the wiring structure 4. The surface roughness of the side surface S1 of the insulating resin layer 8 is expressed as R1. The surface roughness of the side surface S2 of the wiring structure 4 is expressed as R2. R1 and R2 differ from each other.
    Type: Application
    Filed: February 25, 2019
    Publication date: August 29, 2019
    Applicant: TDK CORPORATION
    Inventors: Shuichi TAKIZAWA, Hironori SATO, Atsushi YOSHINO
  • Publication number: 20190267192
    Abstract: A method for manufacturing a multilayer electronic component having an element body in which a functional part and a conductor part are laminated. The green multilayer body 11 is formed on the temporary holding film 62 formed on the release substrate. The green multilayer body 11 is formed by repeating the first step forming a green functional part using the first ink containing the functional particles and the second step forming the green conductor part using the second ink containing the conductive particles. The temporary holding film 62 has conductivity.
    Type: Application
    Filed: February 25, 2019
    Publication date: August 29, 2019
    Applicant: TDK CORPORATION
    Inventors: Jun SATO, Yukari WADA, Koki SHINOZAWA
  • Publication number: 20190267168
    Abstract: Provided is a ferrite sintered magnet including a main phase formed of ferrite having a hexagonal magnetoplumbite type crystalline structure, in which the main phase contains Fe and Co, and the ferrite sintered magnet contains CaB2O4. CaB2O4 is contained in a heterophase that is a crystalline phase different from the main phase, and an area ratio of CaB2O4 to the entire cross-sectional surface of a sintered magnet, is less than or equal to 2%.
    Type: Application
    Filed: March 29, 2019
    Publication date: August 29, 2019
    Applicant: TDK Corporation
    Inventors: Junnichi NAGAOKA, Hiroyuki ONO, Yuichi SUGAWARA
  • Publication number: 20190267541
    Abstract: In the method for stabilizing a spin element according to an aspect of the disclosure, the spin element includes a current-carrying part extending in a first direction, and an element part laminated on one surface of the current-carrying part and including a ferromagnetic material, in the case where the environmental temperature is a predetermined temperature, a pulse current having a current density of 1.0×107 A/cm2 or more and 1.0×109 A/cm2 or less and a pulse width within a predetermined range is applied at least a predetermined number of times in the first direction of the current-carrying part at intervals of a predetermined waiting time.
    Type: Application
    Filed: February 28, 2018
    Publication date: August 29, 2019
    Applicant: TDK CORPORATION
    Inventors: Yohei SHIOKAWA, Tomoyuki SASAKI
  • Publication number: 20190267540
    Abstract: A spin current magnetized rotation element includes: a first ferromagnetic layer configured for a magnetization direction to be changed; and a spin-orbit torque wiring layer that extends in a second direction intersecting a first direction which is a direction orthogonal to a plane of the first ferromagnetic layer and is positioned in the first direction from the first ferromagnetic layer, wherein the spin-orbit torque wiring layer includes a superparamagnetic body therein, and the superparamagnetic body contains any one of a magnetic element selected from a group consisting of Fe, Co, Ni, and Gd.
    Type: Application
    Filed: April 27, 2018
    Publication date: August 29, 2019
    Applicant: TDK CORPORATION
    Inventor: Yohei SHIOKAWA
  • Publication number: 20190267197
    Abstract: An electrochemical device includes an element body, an exterior sheet, a seal part, and a leading terminal. The element body includes a pair of inner electrodes laminated to sandwich a separator sheet. The exterior sheet covers the element body. The seal part seals a peripheral part of the exterior sheet for immersing the element body in an electrolyte. The leading terminal extends outward from the seal part of the exterior sheet. The exterior sheet includes a front sheet and a back sheet. The front sheet includes a front-side metal sheet. The back sheet includes a back-side metal sheet.
    Type: Application
    Filed: February 12, 2019
    Publication date: August 29, 2019
    Applicant: TDK CORPORATION
    Inventors: Hiroaki HASEGAWA, Hidetake ITOH, Yoshihiko OHASHI, Yuji YOSHINO, Kazunori YOSHIKAWA
  • Publication number: 20190267531
    Abstract: There is provided a thermoelectric conversion device comprising a substrate including a first surface and a second surface which are opposite to each other in a thickness direction, at least one thermoelectric conversion film disposed on the first surface, and a first heat transfer part disposed on a second surface side. The substrate is joined to the first heat transfer part in a movable state with respect to the first heat transfer part.
    Type: Application
    Filed: July 31, 2017
    Publication date: August 29, 2019
    Applicant: TDK CORPORATION
    Inventors: Makoto SHIBATA, Kazuya MAEKAWA, Takashi ASATANI
  • Publication number: 20190267064
    Abstract: In the method for stabilizing a spin element according to an aspect of the disclosure, the spin element includes a current-carrying part extending in a first direction, and an element part laminated on one surface of the current-carrying part and including a ferromagnetic material, a current pulse having a predetermined current value or higher is applied at a predetermined temperature in the first direction of the current-carrying part such that a total pulse application time is equal to or longer than a predetermined time.
    Type: Application
    Filed: February 28, 2018
    Publication date: August 29, 2019
    Applicant: TDK CORPORATION
    Inventors: Yohei SHIOKAWA, Tomoyuki SASAKI
  • Publication number: 20190269046
    Abstract: A circuit module 2 comprises: a wiring structure 4; at least one electronic component 6a, 6b arranged on the upper surface of the wiring structure 4; an insulating resin layer 8 which is provided on the upper surface of the wiring structure 4 and in which at least one electronic component 6a, 6b is embedded; and a metal layer 10 provided on the upper surface of the insulating resin layer 8. The surface roughness of the portion 51 directly above each electronic component on the upper surface of the insulating resin layer 8 is expressed as R1. The surface roughness of the portion S2 other than the portion directly above all the electronic components on the upper surface of the insulating resin layer 8 is expressed as R2. At least one R1 satisfies the condition: R1>R2.
    Type: Application
    Filed: February 25, 2019
    Publication date: August 29, 2019
    Applicant: TDK CORPORATION
    Inventors: Shuichi TAKIZAWA, Hironori SATO, Atsushi YOSHINO, Hideki KACHI
  • Patent number: 10396276
    Abstract: The present invention has the purpose of providing an electric-current-generated magnetic field assist type spin-current-induced magnetization reversal element that utilizes magnetization reversal based on pure spin current. The electric-current-generated magnetic field assist type spin-current-induced magnetization reversal element of the present invention includes a first ferromagnetic metal layer with a varying magnetization direction; spin-orbit torque wiring that adjoins the first ferromagnetic metal layer and that extends in a second direction in a plane orthogonal to a first direction normal to the first ferromagnetic metal layer; and electric-current-generated magnetic field assist wiring that is arranged so as to be electrically insulated from the first ferromagnetic metal layer by an insulating layer and in which flows an electric current I0 for forming a magnetic field H0 that assists magnetization reversal of the first ferromagnetic metal layer.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: August 27, 2019
    Assignee: TDK CORPORATION
    Inventors: Tomoyuki Sasaki, Yohei Shiokawa
  • Patent number: 10396435
    Abstract: Disclosed herein is an antenna device that includes a planar coil pattern having first, second, third and fourth sections, the first and second sections being opposite to each other, and the third and fourth sections being opposite to each other, and a metal layer having at least one aperture. A part of the first section and a part of the second section overlap the metal layer, and a remaining part of the first section and a remaining part of the second section overlap the aperture. A part or an entirety of both the third and fourth sections overlaps the metal layer or the aperture.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: August 27, 2019
    Assignee: TDK CORPORATION
    Inventors: Toshifumi Komachi, Toshio Tomonari, Hirohumi Asou
  • Patent number: 10392704
    Abstract: A method of providing a coating on a conductor. The coating has a first layer containing palladium and a second layer containing gold from the conductor side. The first layer has an inner layer on the conductor side and an outer layer arranged nearer to the second layer than the inner layer, and the outer layer has a higher phosphorus concentration than the inner layer.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: August 27, 2019
    Assignee: TDK CORPORATION
    Inventors: Kenichi Yoshida, Yuhei Horikawa, Atsushi Sato, Hisayuki Abe
  • Patent number: 10396675
    Abstract: A switching power supply apparatus is provided which reduces the time of application of an input voltage to a choke to suppress a peak current flowing through switch elements when a primary or secondary voltage is 0 V (or a voltage near 0 V). A DAB converter or switching power supply apparatus performs phase control to change at least either a first conduction width or a second conduction width of pairs of diagonally-arranged switch elements, constituting a primary full bridge circuit. The first conduction width is a time width in which a pulse for driving the first switch element and a pulse for driving the fourth switch element overlap temporally. The second conduction width is a time width in which a pulse for driving the second switch element and a pulse for driving the third switch element overlap temporally.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: August 27, 2019
    Assignee: TDK CORPORATION
    Inventors: Ryosuke Hayasaki, Toshiki Murayama, Ichiro Takayama, Kazuki Iwaya
  • Patent number: 10396786
    Abstract: A key input apparatus includes a key top capable of moving up and down through a pressing operation; a first substrate, which includes a first surface, which is positioned on the key top side, and a second surface, which is opposite to the first surface, and the first substrate supports the key top and is provided to be movable up and down along with the key top; a second substrate, which is provided between the key top and the first substrate in the direction of the up-and-down movement of the key top, and the second substrate includes a first surface, which is positioned on the first substrate side, and a second surface, which is opposite to the first surface; a magnetic field generation unit; a magnetic sensor unit, which includes a magnetic detection element that detects a magnetic field generated from the magnetic field generation unit; and an adhesion unit, which includes a soft magnetic material capable of adhering to the magnetic field generation unit.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: August 27, 2019
    Assignee: TDK Corporation
    Inventor: Naoki Ohta
  • Patent number: 10395822
    Abstract: A rare-earth magnet is an R-T-B-based rare-earth magnet containing a rare-earth element R, a transition metal element T, and boron B. The rare-earth magnet further contains Cu and Co, while having a Cu concentration distribution with a gradient along a direction from a surface of the rare-earth magnet to the inside thereof, Cu having a higher concentration on the surface side of the rare-earth magnet than on the inside thereof, and a Co concentration distribution with a gradient along a direction from the surface of the rare-earth magnet to the inside thereof, Co having a higher concentration on the surface side of the rare-earth magnet than on the inside thereof. The rare-earth magnet is excellent in corrosion resistance.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: August 27, 2019
    Assignee: TDK CORPORATION
    Inventors: Masashi Miwa, Yasuyuki Kawanaka, Masahiro Oishi
  • Patent number: 10395821
    Abstract: Disclosed herein is a rotary type magnetic coupling device including first and second coils magnetically coupled to each other used for a rotator. Each of the first and second coils is a loop-shaped having an opening surrounding a rotary axis of the rotator. Each of the first and second coils includes first and second wiring parts extending in a peripheral direction of the rotator, a third wiring part bent in the rotary axis direction from one end of the first and second wiring parts, and a fourth wiring part bent in the rotary axis direction from other end of the first and second wiring parts. At least one of the first and second coils is configured such that the third and fourth wiring parts match or overlap each other when viewed in a radial direction substantially orthogonal to the rotary axis.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: August 27, 2019
    Assignee: TDK CORPORATION
    Inventors: Kazuyoshi Hanabusa, Takashi Urano
  • Publication number: 20190255618
    Abstract: A method of processing a rare earth magnet comprises: a step of irradiating an R-T-B-based rare earth magnet with laser light to process; and a step of performing heat treatment on the magnet after the irradiating. The heat treatment includes: a step A of bringing the temperature of the magnet to 400° C. or less, a step B of holding the magnet at a temperature T1 in a range of 400 to 700° C. after the step A, and a step C of bringing the temperature of the magnet to less than 400° C. after the step B. The temperature of the magnet is made not to exceed 700° C. between the step A and the step B. The temperature of the magnet is made not to exceed 700° C. between the step B and the step C. A step of setting the magnet at a temperature higher than 700° C. after the step C is not included.
    Type: Application
    Filed: February 19, 2019
    Publication date: August 22, 2019
    Applicant: TDK Corporation
    Inventors: Takeshi MASUDA, Taeko TSUBOKURA, Hiroshi MIYASAKA, Yutaka HATAKEYAMA, Toshihiro KUROSHIMA