Patents Assigned to TDK Corporation
  • Patent number: 10830614
    Abstract: A magnetic sensor generates a detection signal that varies according to the strength of a target magnetic field at a detection position in a reference plane. The magnetic sensor includes a magnetoresistive element. The magnetoresistive element includes a magnetization pinned layer having a magnetization in a first direction, and a free layer having a magnetization whose direction is variable according to the direction of an acting magnetic field, the acting magnetic field being a composite magnetic field of all magnetic fields acting on the free layer. The free layer has uniaxial magnetic anisotropy such that an easy axis of magnetization is oriented in a direction parallel to a second direction. In the reference plane, both of two directions orthogonal to the second direction are different from the direction of the target magnetic field.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: November 10, 2020
    Assignee: TDK CORPORATION
    Inventors: Kenzo Makino, Tsuyoshi Umehara
  • Patent number: 10830838
    Abstract: A magnetic sensor includes a magnetic field conversion unit, a magnetic field detection unit, and a magnetic film. The magnetic field conversion unit includes a yoke that receives an input magnetic field and generates an output magnetic field. The input magnetic field contains an input magnetic field component in a direction parallel to Z direction. The output magnetic field contains an output magnetic field component in a direction parallel to X direction. The magnetic field detection unit includes a magnetic detection element that receives the output magnetic field and generates a detection value corresponding to the output magnetic field component. The magnetic film absorbs part of magnetic flux resulting from a noise magnetic field, which is a magnetic field in a direction to which the magnetic detection element has sensitivity and which is other than the output magnetic field component.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: November 10, 2020
    Assignee: TDK CORPORATION
    Inventors: Keisuke Uchida, Kenzo Makino
  • Patent number: 10833252
    Abstract: The magnetoresistance effect element includes a semiconductor layer, a first ferromagnetic layer and a second ferromagnetic layer. The semiconductor layer has a first region, a second region, and a third region. The first ferromagnetic layer is provided on the first region, the second ferromagnetic layer is provided on the second region, and the third region is sandwiched between the first region and the second region in the first direction. The third region has n-type conductivity, and crystal orientations of the semiconductor material in the first direction are substantially the same in the first region, the second region, and the third region. An interatomic distance of the third region in an upper surface neighboring region including the upper surface is larger than an interatomic distance of the first region in the upper surface neighboring region.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: November 10, 2020
    Assignee: TDK CORPORATION
    Inventor: Hayato Koike
  • Patent number: 10833247
    Abstract: The piezoelectric composition is represented by the following Chemical Formula (1): x[BimFeO3]-y[BamTiO3]-z[SrmTiO3]??(1) wherein 0.5?x?0.8, 0.02?y?0.4, 0.02?z?0.2, x+y+z=1, and 0.96?m?1.04.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: November 10, 2020
    Assignee: TDK CORPORATION
    Inventors: Keisuke Teranishi, Masashi Kitazaki, Makoto Ishizaki
  • Publication number: 20200350490
    Abstract: A spin-orbit-torque type magnetoresistance effect element includes: a first ferromagnetic layer; a second ferromagnetic layer; a non-magnetic layer which is located between the first ferromagnetic layer and the second ferromagnetic layer; and a spin-orbit-torque wiring which has the first ferromagnetic layer laminated thereon, wherein the spin-orbit-torque wiring extends in a second direction intersecting a first direction corresponding to an orthogonal direction of the first ferromagnetic layer, wherein the first ferromagnetic layer includes a first laminated structure and an interface magnetic layer in order from the spin-orbit-torque wiring, wherein the first laminated structure is a structure in which a ferromagnetic conductor layer and an inorganic compound containing layer are disposed in order from the spin-orbit-torque wiring, wherein the ferromagnetic conductor layer contains a ferromagnetic metal element, and wherein the inorganic compound containing layer contains at least one inorganic compound se
    Type: Application
    Filed: July 22, 2020
    Publication date: November 5, 2020
    Applicant: TDK CORPORATION
    Inventor: Yohei SHIOKAWA
  • Publication number: 20200350107
    Abstract: A laminated electronic component includes an element body and a pair of conductors. The element body is formed by laminating a plurality of element-body layers in a first direction. The pair of conductors is formed by laminating a plurality of conductor layers in the first direction. The pair of conductors is provided to the element body in such a way as to be separated from each other in a second direction orthogonal to the first direction. At a cross section orthogonal to the first direction, the pair of conductors has an uneven portion and the element body has an uneven portion engaged with the uneven portion of the pair of conductors.
    Type: Application
    Filed: July 20, 2020
    Publication date: November 5, 2020
    Applicant: TDK CORPORATION
    Inventors: Shunji AOKI, Yuya ISHIMA, Hajime KATO, Yuto SHIGA, Kazuya TOBITA, Youichi KAZUTA, Satoru OKAMOTO
  • Publication number: 20200352061
    Abstract: A method of forming a metal magnetic film includes forming the metal magnetic film by a plating process, wherein the metal magnetic film comprises a permalloy and carbon atoms and a content of the carbon atoms is 0.3 to 3.0 at % based on a total amount of the carbon atoms and metal elements.
    Type: Application
    Filed: July 17, 2020
    Publication date: November 5, 2020
    Applicant: TDK CORPORATION
    Inventors: Takashi YAMADA, Miyuki YANAGIDA, Atsushi SATO, Kenichi KAWABATA
  • Publication number: 20200349419
    Abstract: A neural network arithmetic processing device is capable of implementing a further increase in speed and efficiency of multiply-accumulate arithmetic operation, suppressing an increase in circuit scale, and performing multiply-accumulate arithmetic operation with simple design. A neural network arithmetic processing device includes a first multiply-accumulate arithmetic unit, a register connected to the first multiply-accumulate arithmetic unit, and a second multiply-accumulate arithmetic unit connected to the register. The first multiply-accumulate arithmetic unit has a first memory, a second memory, a first multiplier, a first adder, and a first output unit. The second multiply-accumulate arithmetic unit has an input unit, a third memory, second multipliers, second adders, and second output units.
    Type: Application
    Filed: March 16, 2020
    Publication date: November 5, 2020
    Applicant: TDK CORPORATION
    Inventor: Keita SUDA
  • Patent number: 10825596
    Abstract: A laminated electronic component includes an element body and a pair of conductors. The element body is formed by laminating a plurality of element-body layers in a first direction. The pair of conductors is formed by laminating a plurality of conductor layers in the first direction. The pair of conductors is provided to the element body in such a way as to be separated from each other in a second direction orthogonal to the first direction. At a cross section orthogonal to the first direction, the pair of conductors has an uneven portion and the element body has an uneven portion engaged with the uneven portion of the pair of conductors.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: November 3, 2020
    Assignee: TDK CORPORATION
    Inventors: Shunji Aoki, Yuya Ishima, Hajime Kato, Yuto Shiga, Kazuya Tobita, Youichi Kazuta, Satoru Okamoto
  • Patent number: 10826110
    Abstract: A positive electrode active material for a lithium ion secondary battery is lithium vanadium phosphate represented by a following composition expression (1) and in which a peak intensity ((002)int/(201)int) of a (002) plane normalized with respect to a peak intensity of a (201) plane and a peak intensity ((102)int/(201)int) of a (102) plane normalized with respect to a peak intensity of the (201) plane in an X-ray diffraction pattern satisfy 0.35?(002)int/(201)int?0.53 and 0.46?(102)int/(201)int?0.63, respectively, LixVOPO4 . . . (1).
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: November 3, 2020
    Assignee: TDK CORPORATION
    Inventors: Junpei Shitaba, Hideaki Seki, Masahiro Tsuchiya
  • Patent number: 10825611
    Abstract: To improve a mounting reliability while maintaining a thickness of the external electrode at a side face of a multilayer electronic component thin. The multilayer electronic component includes ceramic body in which ceramic layers and an external electrode formed to an end face of the ceramic body. The upper electrode layer includes an element having higher standard electrode potential than Cu. The external electrode includes an external electrode end part and an external electrode extension part which is integrally formed with the external electrode end part. 1.20?t2/t1?4.50 is satisfied in which t1 is a total thickness of a thickness of the intermediate electrode layer thickness and t2 is a length from an end of the base electrode layer to an end of the upper electrode layer along the first axis of the external electrode extension part connected by the conductive adhesive.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: November 3, 2020
    Assignee: TDK CORPORATION
    Inventors: Tomohisa Fukuoka, Tetsuhiro Takahashi, Akinori Ohi
  • Patent number: 10825985
    Abstract: A magnetoresistance effect element includes a first ferromagnetic layer, a second ferromagnetic layer, and a tunnel barrier layer that is interposed between the first ferromagnetic layer and the second ferromagnetic layer. The tunnel barrier layer is a stacked body including one or more first oxide layers having a spinel structure and one or more second oxide layers having a spinel structure with a composition which is different from a composition of the first oxide layer.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: November 3, 2020
    Assignee: TDK CORPORATION
    Inventors: Shinto Ichikawa, Katsuyuki Nakada, Tomoyuki Sasaki
  • Patent number: 10825980
    Abstract: A vibrating device includes a diaphragm, a piezoelectric element, and a wiring board. The piezoelectric element and the wiring board are bonded to a first principal plane of the diaphragm. The wiring board is electrically connected with the piezoelectric element. The piezoelectric element includes a piezoelectric element body, a plurality of internal electrodes, and a plurality of external electrodes. The piezoelectric element body has a second principal plane, a third principal plane, and a side surface. The third principal plane and the side surface are bonded to the first principal plane. The wiring board has a resin film, a plurality of conductors, and a coating film. The coating film is disposed on the plurality of conductors in such a way as to cover the plurality of conductors. One end portions of the plurality of conductors are exposed from the coating film and electrically connected with corresponding external electrodes.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: November 3, 2020
    Assignee: TDK CORPORATION
    Inventors: Kaoru Kijima, Tatsuya Taki, Kazushi Tachimoto, Toshiki Maruyama
  • Patent number: 10825589
    Abstract: Provided is an R-T-B based rare earth magnet. R is one or more rare earth elements, T is one or more transition metal elements essentially including Fe or Fe and Co, and B is boron. B content with respect to a total R-T-B based rare earth magnet is 0.80 mass % or more and 0.98 mass % or less. The R-T-B based rare earth magnet includes an R1T4B4 phase.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: November 3, 2020
    Assignee: TDK CORPORATION
    Inventors: Makoto Iwasaki, Tetsuya Hidaka, Eiji Kato, Takuma Hayakawa, Hidetake Kitaoka
  • Publication number: 20200342298
    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.
    Type: Application
    Filed: December 12, 2018
    Publication date: October 29, 2020
    Applicant: TDK CORPORATION
    Inventor: Tatsuo SHIBATA
  • Patent number: 10818422
    Abstract: In a multilayer coil component, an end of a lower coil layer and an end of a connecting part are directly overlapped, and the end of the lower coil layer includes a contact edge positioned on a side of the connecting part and being in contact with the connecting part and a non-contact edge positioned on a side opposite to the connecting part and not being in contact with the connecting part. Then, the contact edge and the non-contact edge are not overlapped when viewed from a laminated direction. Consequently, a propagation distance of a crack becomes longer as compared with the case where an end face is parallel to the laminated direction, effectively suppressing advance of the crack. Suppressed advance of a crack in this manner makes the multilayer coil component provide a high component strength as a whole.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: October 27, 2020
    Assignee: TDK CORPORATION
    Inventors: Yuusuke Nagai, Takashi Suzuki, Kouichi Kakuda, Kunihiko Kawasaki, Shinichi Kondo, Yuya Ishima, Shinichi Sato, Masaki Takahashi, Takashi Endo
  • Patent number: 10818881
    Abstract: Disclosed herein is a battery that includes a chargeable/dischargeable battery cell and an outer case that houses the battery cell. The outer case having first and second top plates overlapping each other as viewed in a thickness direction thereof. The first top plate has a first convex part and a first concave part having mutually different heights in the thickness direction, the second top plate has a second convex part and a second concave part having mutually different heights in the thickness direction. The first convex part overlaps the second concave part as viewed in the thickness direction, and the second convex part overlaps the first concave part as viewed in the thickness direction.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: October 27, 2020
    Assignee: TDK CORPORATION
    Inventors: Takayuki Mino, Mikio Tsuruoka
  • Patent number: 10818990
    Abstract: A magnetoresistance effect device includes a first port, a second port, a first circuit unit and a second circuit unit which are connected in series between the first port and the second port, a shared reference electric potential terminal or a first reference electric potential terminal and a second reference electric potential terminal, and a shared DC application terminal or a first DC application terminal and a second DC application terminal, wherein the first circuit unit and the second circuit unit include a magnetoresistance effect element and a conductor connected to one end thereof, a first end portion of the conductor is connected to a high-frequency current input side, and a second end portion of the first conductor is connected to the shared reference electric potential terminal, the first reference electric potential terminal or the second reference electric potential terminal.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: October 27, 2020
    Assignee: TDK CORPORATION
    Inventors: Tsuyoshi Suzuki, Shinji Hara
  • Patent number: 10819167
    Abstract: A wireless power reception device detects a power receiving coil position relative to a power transmitting coil while curbing an increase in power loss. The wireless power reception device includes: a power receiving coil magnetically coupled to the power transmitting coil; a first rectification and smoothing circuit rectifying an AC voltage supplied from the power receiving coil and outputs the rectified AC voltage to a load; first and second capacitors respectively connected to first and second transmission lines; a first resistor having one terminal connected to the first capacitor and the other terminal is supplied with a predetermined reference potential; a second resistor having one terminal connected to the second capacitor and the other terminal is supplied with the reference potential; and a position detecting circuit detecting the power receiving coil position relative to the power transmitting coil on the basis of first and second junction point potentials.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: October 27, 2020
    Assignee: TDK CORPORATION
    Inventors: Kazunori Oshima, Ryo Miyazawa, Kenji Furukawa, Shinya Ofuji
  • Patent number: D901384
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: November 10, 2020
    Assignee: TDK CORPORATION
    Inventors: Masatoshi Yasuda, Hideaki Harata