Patents Assigned to TDK Corporation
  • Patent number: 11158785
    Abstract: A magnetoresistance effect element includes: a first ferromagnetic layer; a second ferromagnetic layer; and a non-magnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer, wherein at least one of the first ferromagnetic layer and the second ferromagnetic layer includes a first layer and a second layer in order from the side closer to the non-magnetic layer, the first layer contains a crystallized Co-based Heusler alloy, at least a part of the second layer is crystallized, the second layer contains a ferromagnetic element, boron element and an additive element, and the additive element is any element selected from a group consisting of Ti, V, Cr, Cu, Zn, Zr, Mo, Ru, Pd, Ta, W, Ir, Pt, and Au.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: October 26, 2021
    Assignee: TDK CORPORATION
    Inventors: Shinto Ichikawa, Kazuumi Inubushi, Katsuyuki Nakada
  • Patent number: 11158443
    Abstract: A soft magnetic alloy contains a main component having a composition formula of (Fe(1?(?+?))X1?X2?)(1?(a+b+c+d))MaBbPcCd and auxiliary components including at least Ti, Mn and Al. In the composition formula, X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Ag, Zn, Sn, As, Sb, Bi and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W and V. In the composition formula, 0.030?a?0.100, 0.050?b?0.150, 0<c?0.030, 0<d?0.030, ??0, ??0, and 0??+??0.50 are satisfied. In the soft magnetic alloy, a content of Ti is 0.001 to 0.100 wt %, a content of Mn is 0.001 to 0.150 wt %, and a content of Al is 0.001 to 0.100 wt %.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: October 26, 2021
    Assignee: TDK CORPORATION
    Inventors: Akihiro Harada, Hiroyuki Matsumoto, Kenji Horino, Kazuhiro Yoshidome, Akito Hasegawa, Hajime Amano, Kensuke Ara, Seigo Tokoro, Masakazu Hosono, Takuma Nakano, Satoko Mori
  • Patent number: 11156478
    Abstract: Magnetic sensor 1 has MR elements 11A to 14A that are connected to each other. MR elements 11A to 14A belongs either to group G1 in which electric resistance increases when the magnetization direction of each free layer 26 is rotated a predetermined angle in a same direction, or to group G2 in which the electric resistance decreases when the magnetization direction of each free layer 26 is rotated the predetermined angle in the same direction. A variation of an output of magnetic sensor 1 due to an increase of the electric resistance of the electric resistance elements of one group and a variation of the output of magnetic sensor 1 due to a decrease of the electric resistance of the electric resistance elements of another group are cancelled out.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: October 26, 2021
    Assignee: TDK Corporation
    Inventors: Kenichi Takano, Yuta Saito, Hiraku Hirabayashi
  • Patent number: 11158460
    Abstract: A ceramic electronic component of the present invention includes: a ceramic element body; a terminal electrode formed on from an end surface to a side surface of the ceramic element body; and a lead terminal joined to the terminal electrode by a solder. A fillet of the solder is formed between the terminal electrode of a side surface at the ceramic element body and the lead terminal, and a coating layer is formed on a surface of the lead terminal that is in contact with the solder. The coating layer is formed of a metal component having a contact angle with the solder smaller than that of the lead terminal.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: October 26, 2021
    Assignee: TDK CORPORATION
    Inventors: Akihiro Masuda, Norihisa Ando, Shinya Ito
  • Publication number: 20210327641
    Abstract: In a coil component, a stray capacitance may occur between a conducting wires of an upper layer and a conducting wires of a lower layer arranged in the vertical direction due to the potential difference between them. In the coil component, a separation distance between the conducting wire of the upper layer and the conducting wire of the lower layer is designed to be longer than twice a thickness of an insulation coating of a portion covering a side surface of the conducting wire, and a sufficiently long distance is secured, and thus the stray capacitance is reduced.
    Type: Application
    Filed: April 19, 2021
    Publication date: October 21, 2021
    Applicant: TDK CORPORATION
    Inventors: Hokuto EDA, Masataro SAITO, Kohei TAKAHASHI, Takamasa IWASAKI
  • Publication number: 20210327616
    Abstract: A chip varistor includes an element body exhibiting varistor characteristics, internal electrodes containing a first electrically conductive material, and an intermediate conductor containing a second electrically conductive material. The intermediate conductor is separated from the internal electrodes in a direction in which the internal electrodes oppose each other, and is disposed between the internal electrodes. At least a part of the intermediate conductor overlaps the internal electrodes in the direction in which the internal electrodes oppose each other. The element body includes a low resistance region in which the second electrically conductive material is diffused. The low resistance region is located between the first and second internal electrodes in the direction in which the first and second internal electrodes oppose each other.
    Type: Application
    Filed: April 14, 2021
    Publication date: October 21, 2021
    Applicant: TDK CORPORATION
    Inventors: Satoshi GOTO, Naoyoshi YOSHIDA, Takeshi YANATA, Takeshi OYANAGI, Daiki SUZUKI, Shin KAGAYA, Masayuki UCHIDA, Yusuke IMAI
  • Publication number: 20210328317
    Abstract: A multilayered filter device includes a multilayer stack, a band pass filter, a first band elimination filter, and a second band elimination filter. The band pass filter and the first and second band elimination filters are each constructed using the multilayer stack. The band pass filter includes a plurality of first resonators with open ends. Each band elimination filter includes a connection path, and a second resonator coupled to the connection path. The connection path includes an impedance transformer. The second resonator includes a conductor line constituting a distributed constant line.
    Type: Application
    Filed: June 29, 2021
    Publication date: October 21, 2021
    Applicant: TDK CORPORATION
    Inventors: Yuta ASHIDA, Noriyuki HIRABAYASHI, Shigemitsu TOMAKI
  • Publication number: 20210325486
    Abstract: A magnetic sensor includes a first resistor having a first resistance and a first correction resistor having a second resistance. The first resistor and the first correction resistor are connected in series. The first resistor is configured so that the first resistance changes periodically as strength of a magnetic field component changes periodically. The first correction resistor is configured so that a change in a sum of the first resistance and the second resistance due to a noise magnetic field is smaller than a change in the first resistance due to the noise magnetic field.
    Type: Application
    Filed: March 16, 2021
    Publication date: October 21, 2021
    Applicant: TDK CORPORATION
    Inventor: Yongfu CAI
  • Publication number: 20210323064
    Abstract: A metal powder producing apparatus comprising a melted metal supplying part discharging a melted metal, a cylinder body provided below the melted metal supplying part, and a cooling liquid layer forming part forming a flow of a cooling liquid for cooling the melted metal discharged from the melted metal supplying part along an inner circumference face of the cylinder body, wherein the cooling liquid layer forming part has a primary pressure reservoir, and the primary pressure reservoir is provided on an outer circumference part of the cylinder body.
    Type: Application
    Filed: June 30, 2021
    Publication date: October 21, 2021
    Applicant: TDK CORPORATION
    Inventors: Kenji HORINO, Kazuhiro YOSHIDOME, Akihiro HARADA, Hiroyuki MATSUMOTO
  • Publication number: 20210328136
    Abstract: A magnetoresistance effect element has a first ferromagnetic metal layer, a second ferromagnetic metal layer, and a tunnel barrier layer that is sandwiched between the first and second ferromagnetic metal layers, and the tunnel barrier layer has a spinel structure represented by a composition formula of AIn2Ox (0?x?4), and an A-site is a non-magnetic divalent cation which is one or more selected from a group consisting of magnesium, zinc and cadmium.
    Type: Application
    Filed: May 28, 2021
    Publication date: October 21, 2021
    Applicant: TDK CORPORATION
    Inventors: Tomoyuki SASAKI, Katsuyuki NAKADA, Tatsuo SHIBATA
  • Publication number: 20210327606
    Abstract: In a photosensitive conductive paste containing photosensitive organic components, conductor powder, and quartz powder, melting of the quartz powder does not occur or is very unlikely to occur in a heat treatment step, and in the heat treatment step, it functions sufficiently to bring shrinkage rates and shrinkage behaviors of both of a conductor layer and an element body layer closer to each other when they shrink, and thus generation of voids can be inhibited when it is used for manufacturing a laminated coil component.
    Type: Application
    Filed: April 14, 2021
    Publication date: October 21, 2021
    Applicant: TDK CORPORATION
    Inventors: Yuya Ishima, Masaki Takahashi, Akira Suda, Takashi Suzuki, Hidenobu Umeda
  • Publication number: 20210327637
    Abstract: In an insulation layer of a coil component, a thickness of a second covering part and a third covering part located on the penetration hole side of a first covering part is thinner than that of the first covering part. A stray capacitance occurring between a flat coil pattern and external terminal electrodes is reduced by making the first covering part of the insulation layer thicker than the second covering part and the third covering part. Further, since the second covering part and the third covering part of the insulation layers are thinner than the first covering part, a magnetic volume is increased while external dimensions of the base body is maintained, and thus a high inductance is realized.
    Type: Application
    Filed: April 19, 2021
    Publication date: October 21, 2021
    Applicant: TDK CORPORATION
    Inventors: Hokuto EDA, Masataro SAITO, Kohei TAKAHASHI, Takamasa IWASAKI, Hitoshi OHKUBO, Masazumi ARATA
  • Patent number: 11152145
    Abstract: Soft magnetic metal powder which includes a plurality of soft magnetic metal particles configured by a Fe-based nanocrystal alloy including Cu is provided, wherein the soft magnetic metal particles have core portions and first shell portions surrounding circumferences of the core portions; when an average crystallite size of Cu crystallites existing in the core portions is set as A, and the largest crystallite size of Cu crystallites existing in the first shell portions is set as B, B/A is 3.0 or more and 1000 or less.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: October 19, 2021
    Assignee: TDK CORPORATION
    Inventors: Takuma Nakano, Kazuhiro Yoshidome, Hiroyuki Matsumoto, Satoko Mori, Seigo Tokoro, Kenji Horino
  • Patent number: 11152821
    Abstract: An object of the present invention is to suppress deterioration in detection accuracy during power feeding in the detection of the metallic foreign object using the antenna coil. A metallic foreign object detector includes: an antenna coil; a capacitor that constitutes a resonance circuit RC together with the antenna coil; a power supply that applies voltage to the resonance circuit to generate a vibration signal in the resonance circuit; a determination circuit that determines the presence/absence of a metallic foreign object based on the waveform of the vibration signal; a resonance capacitor switch inserted into the resonance circuit; and a control circuit that controls the open/close state of the resonance capacitor switch. The control circuit brings the resonance capacitor switch into a closed state responding to the power supply starting application of voltage to the resonance circuit.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: October 19, 2021
    Assignee: TDK CORPORATION
    Inventors: Kazunori Oshima, Akira Gotani, Kazuki Kondo, Narutoshi Fukuzawa
  • Patent number: 11150076
    Abstract: An angle sensor generates an angle detection value based on a first and a second detection signal. A correction apparatus performs correction processing for generating a first corrected detection signal by adding a first correction value to the first detection signal and generating a second corrected detection signal by adding a second correction value to the second detection signal. When an angle to be detected varies with a period T and if no correction processing is performed, the angle detection value contains an Nth-order angle error component varying with a period of T/N. Each of the first and second detection signals contains an (N+1)th-order signal error component. The order of the first and second correction values is N?1.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: October 19, 2021
    Assignee: TDK CORPORATION
    Inventor: Shinichirou Mochizuki
  • Patent number: 11152154
    Abstract: An electronic component includes an element body and an external electrode. The element body includes a side surface and an end surface. The external electrode includes a conductive resin layer disposed over the side surface and the end surface. The conductive resin layer includes a first region positioned on the end surface, a second region positioned on the side surface, and a third region positioned on a ridge portion between the end surface and the side surface. In a case where a maximum thickness of the first region is T1 (?m), a maximum thickness of the second region is T2 (?m), and a minimum thickness of the third region is T3 (?m), the maximum thickness T1 and the maximum thickness T2 satisfy a relation of T2/T1?0.11, and the maximum thickness T1 and the minimum thickness T3 satisfy a relation of T3/T1?0.11.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: October 19, 2021
    Assignee: TDK CORPORATION
    Inventors: Yuichi Nagai, Atsushi Takeda, Takehisa Tamura, Shinya Onodera
  • Patent number: 11152142
    Abstract: An R-T-B based permanent magnet excellent in magnetic properties relatively reduces the amount of a heavy rare earth element used. An R-T-B based permanent magnet, wherein R represents a rare earth element, T an iron group element and B boron, includes main phase grains including an R2T14B crystal phase and grain boundaries formed between main phase grains. Grain boundaries include R—O—C—N concentrated parts where concentrations of R, O, C and N are all higher than those in main phase grains. C/R(S)>C/R(C) is satisfied in which C/R(S) represents a C/R ratio (atomic ratio) in R—O—C—N concentrated parts present in a surface of a R-T-B based permanent magnet and C/R(C) represents a C/R ratio (atomic ratio) in the R—O—C—N concentrated parts present in the center of a R-T-B based permanent magnet, and a heavy rare earth element RH is included in the R-T-B based permanent magnet.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: October 19, 2021
    Assignee: TDK CORPORATION
    Inventors: Yuki Nagamine, Masashi Miwa, Yoshinori Fujikawa
  • Publication number: 20210316622
    Abstract: A power receiving coil unit is installed on a moving object. The power receiving coil unit includes a power receiving coil, a housing that is made from a resin and that includes an accommodator that accommodates the power receiving coil, and a reinforcing member that is made from metal, is provided outward from the accommodator of the housing, and reinforces the housing.
    Type: Application
    Filed: April 8, 2021
    Publication date: October 14, 2021
    Applicant: TDK CORPORATION
    Inventors: Hiroshi KAMEYAMA, Hideo ASANO
  • Publication number: 20210318394
    Abstract: A magnetoresistance effect element includes a first ferromagnetic layer, a second ferromagnetic layer, a nonmagnetic layer that is disposed between the first ferromagnetic layer and the second ferromagnetic layer, and an insertion layer that is disposed at least one of a position between the first ferromagnetic layer and the nonmagnetic layer and a position between the second ferromagnetic layer and the nonmagnetic layer, in which the nonmagnetic layer is composed of an oxide containing Mg and Ga, and the insertion layer is a ferromagnetic component containing Ga.
    Type: Application
    Filed: March 8, 2021
    Publication date: October 14, 2021
    Applicant: TDK CORPORATION
    Inventors: Shogo Yonemura, Tomoyuki Sasaki, Shinto Ichikawa
  • Patent number: D933616
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: October 19, 2021
    Assignee: TDK CORPORATION
    Inventors: Yoshiki Ohta, Yoshikazu Shimura, Ryuhei Sasaki, Kazushi Tachimoto, Hideya Sakamoto, Tetsuyuki Taniguchi, Akihiro Takeda