Patents by Inventor Maiko SHIROKAWA

Maiko SHIROKAWA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11898913
    Abstract: An electromagnetic wave sensor 1 has electromagnetic wave absorbers disposed side by side in first and second directions, temperature detection portions held by the respective electromagnetic wave absorbers and sets of two arm portions connected to each electromagnetic wave absorber at two connection portions. In a plan view, the arm portions have two first extending portions extending from the connection portions in directions of which components in the second direction are opposite to each other, and two second extending portions extending from the first extending portions in directions of which components in the first direction are opposite to each other. Four sides of a rectangle circumscribing each of the electromagnetic wave absorbers with a smallest area are inclined with respect to the first direction in directions in which each electromagnetic wave absorber is away from the second extending portions with the connection portions as fulcrums.
    Type: Grant
    Filed: August 17, 2022
    Date of Patent: February 13, 2024
    Assignee: TDK CORPORATION
    Inventors: Shinji Hara, Naoki Ohta, Kazuya Maekawa, Susumu Aoki, Maiko Shirokawa
  • Patent number: 11769613
    Abstract: A thermistor element includes: a thermistor film; a first electrode provided in contact with one surface of the thermistor film; and a pair of second electrodes provided in contact with an other surface of the thermistor film, wherein the thermistor film is provided to cover a periphery of the first electrode.
    Type: Grant
    Filed: December 1, 2021
    Date of Patent: September 26, 2023
    Assignee: TDK CORPORATION
    Inventors: Susumu Aoki, Shinji Hara, Naoki Ohta, Maiko Shirokawa, Eiji Komura
  • Patent number: 11676744
    Abstract: A thermistor element includes: a thermistor film; a pair of first electrodes in contact with one surface of the thermistor film; an insulation film opposite to a contact side of the pair of first electrodes, the contact side on which the pair of first electrodes is in contact with the thermistor film; and at least one opening portion located in a region which overlaps each of the first electrodes when viewed in a plan view and passing through the insulation film. Each first electrode has a first portion located where each of the first electrodes and the opening portion overlap when viewed in a plan view and a second portion outside of where each of the first electrodes and the opening portion overlap when viewed in a plan view and is over the first portion and second portion to be in contact with the one surface of the thermistor film.
    Type: Grant
    Filed: February 11, 2022
    Date of Patent: June 13, 2023
    Assignee: TDK CORPORATION
    Inventors: Susumu Aoki, Shinji Hara, Naoki Ohta, Maiko Shirokawa
  • Patent number: 11668607
    Abstract: A thermistor element includes a thermistor film, a first electrode provided in contact with one surface of the thermistor film, and a pair of second electrodes provided in contact with the other surface of the thermistor film, wherein the thermistor film includes an oxide having a spinel crystal structure and having a [111] preferred orientation in a film thickness direction.
    Type: Grant
    Filed: December 1, 2021
    Date of Patent: June 6, 2023
    Assignee: TDK CORPORATION
    Inventors: Maiko Shirokawa, Shinji Hara, Naoki Ohta, Susumu Aoki, Eiji Komura
  • Publication number: 20230062983
    Abstract: The present disclosure includes an electromagnetic wave detector, and a pair of arms that are positioned on both sides with the electromagnetic wave detector interposed therebetween. The electromagnetic wave detector includes a temperature detection element, and electromagnetic wave absorbers which cover at least a part of the temperature detection element. The structure body has a structure in which the electromagnetic wave detector is hung or suspended with respect to a substrate facing the electromagnetic wave detector via the pair of arms. Area of a surface of the pair of arms on a side facing the substrate are larger than area of surface thereof on a side opposite to the side facing the substrate.
    Type: Application
    Filed: August 18, 2022
    Publication date: March 2, 2023
    Applicant: TDK CORPORATION
    Inventors: Maiko SHIROKAWA, Shinji HARA, Naoki OHTA, Kazuya MAEKAWA, Susumu AOKI
  • Publication number: 20230064502
    Abstract: The present invention includes an electromagnetic wave detector, and a pair of arm portions and that are positioned on both sides with the electromagnetic wave detector interposed therebetween. The electromagnetic wave detector includes a temperature detection element, and electromagnetic wave absorbers which cover at least a part of the temperature detection element. Each of the arm portions includes a conductor layer which is in a line shape and electrically connected to the temperature detection element, and dielectric layers which are disposed on both sides of the conductor layer. In a short direction of the dielectric layers in a plan view, the conductor layer has a shape protruding outward beyond both end portions of the dielectric layers in the short direction.
    Type: Application
    Filed: August 18, 2022
    Publication date: March 2, 2023
    Applicant: TDK CORPORATION
    Inventors: Susumu AOKI, Shinji HARA, Naoki OHTA, Kazuya MAEKAWA, Maiko SHIROKAWA
  • Publication number: 20230065804
    Abstract: A structure body includes: an electromagnetic wave detector; and a pair of arm portions that are positioned on both sides with the electromagnetic wave detector interposed therebetween. The electromagnetic wave detector includes a temperature detection element and an electromagnetic wave absorber which covers at least a part of the temperature detection element. Each of the arm portions includes a wiring layer which is in a line shape and electrically connected to the temperature detection element, and protective layers, a part of each of which is disposed on corresponding one of both sides of the wiring layer. The protective layers are made of a material having a lower thermal conductivity than the wiring layer. In a short direction of the protective layers in a plan view, the wiring layer is positioned on an inward side of both end portions of the protective layers in the short direction.
    Type: Application
    Filed: August 18, 2022
    Publication date: March 2, 2023
    Applicant: TDK CORPORATION
    Inventors: Susumu AOKI, Shinji HARA, Naoki OHTA, Kazuya MAEKAWA, Maiko SHIROKAWA
  • Publication number: 20230054724
    Abstract: An electromagnetic wave sensor 1 has electromagnetic wave absorbers disposed side by side in first and second directions, temperature detection portions held by the respective electromagnetic wave absorbers and sets of two arm portions connected to each electromagnetic wave absorber at two connection portions. In a plan view, the arm portions have two first extending portions extending from the connection portions in directions of which components in the second direction are opposite to each other, and two second extending portions extending from the first extending portions in directions of which components in the first direction are opposite to each other. Four sides of a rectangle circumscribing each of the electromagnetic wave absorbers with a smallest area are inclined with respect to the first direction in directions in which each electromagnetic wave absorber is away from the second extending portions with the connection portions as fulcrums.
    Type: Application
    Filed: August 17, 2022
    Publication date: February 23, 2023
    Applicant: TDK CORPORATION
    Inventors: Shinji HARA, Naoki OHTA, Kazuya MAEKAWA, Susumu AOKI, Maiko SHIROKAWA
  • Publication number: 20230055177
    Abstract: An electromagnetic wave sensor has electromagnetic wave absorbers disposed side by side in first and second directions, temperature detection portions held by the respective electromagnetic wave absorbers and sets of two arm portions connected to each of the electromagnetic wave absorbers at two connection portions. In a plan view, the arm portions have two first extending portions extending from the connection portions in directions of which components in the second direction are opposite to each other, and two second extending portions extending from the first extending portions in directions of which components in the first direction are opposite to each other. Four sides of a rectangle circumscribing each of the electromagnetic wave absorbers with a smallest area are inclined with respect to the first direction in directions in which each of the electromagnetic wave absorbers approaches the second extending portions with the connection portions as fulcrums.
    Type: Application
    Filed: August 16, 2022
    Publication date: February 23, 2023
    Applicant: TDK CORPORATION
    Inventors: Shinji HARA, Naoki OHTA, Kazuya MAEKAWA, Susumu AOKI, Maiko SHIROKAWA
  • Publication number: 20220262548
    Abstract: A thermistor element includes: a thermistor film; a pair of first electrodes in contact with one surface of the thermistor film; an insulation film opposite to a contact side of the pair of first electrodes, the contact side on which the pair of first electrodes is in contact with the thermistor film; and at least one opening portion located in a region which overlaps each of the first electrodes when viewed in a plan view and passing through the insulation film. Each first electrode has a first portion located where each of the first electrodes and the opening portion overlap when viewed in a plan view and a second portion outside of where each of the first electrodes and the opening portion overlap when viewed in a plan view and is over the first portion and second portion to be in contact with the one surface of the thermistor film.
    Type: Application
    Filed: February 11, 2022
    Publication date: August 18, 2022
    Applicant: TDK CORPORATION
    Inventors: Susumu AOKI, Shinji HARA, Naoki OHTA, Maiko SHIROKAWA
  • Publication number: 20220181050
    Abstract: A thermistor element includes: a thermistor film; a first electrode provided in contact with one surface of the thermistor film; and a pair of second electrodes provided in contact with an other surface of the thermistor film, wherein the thermistor film is provided to cover a periphery of the first electrode.
    Type: Application
    Filed: December 1, 2021
    Publication date: June 9, 2022
    Applicant: TDK CORPORATION
    Inventors: Susumu AOKI, Shinji HARA, Naoki OHTA, Maiko SHIROKAWA, Eiji KOMURA
  • Publication number: 20220178758
    Abstract: An electromagnetic wave sensor includes a substrate having transmittance of electromagnetic waves having a specific wavelength, an insulator layer provided on one surface side of the substrate, a thermistor film disposed to have a space between the thermistor film and one surface of the substrate, and a wiring part provided inside or on a surface of the insulator layer and electrically connected to the thermistor film, wherein a transmittance of the electromagnetic waves at a portion facing the thermistor film is relatively higher than a transmittance of the electromagnetic waves at a portion where the wiring part is provided in a layer in which the insulator layer is provided.
    Type: Application
    Filed: December 1, 2021
    Publication date: June 9, 2022
    Applicant: TDK CORPORATION
    Inventors: Shinji HARA, Naoki OHTA, Susumu AOKI, Eiji KOMURA, Maiko SHIROKAWA
  • Publication number: 20220178759
    Abstract: A thermistor element includes a thermistor film, a first electrode provided in contact with one surface of the thermistor film, and a pair of second electrodes provided in contact with the other surface of the thermistor film, wherein the thermistor film includes an oxide having a spinel crystal structure and having a [111] preferred orientation in a film thickness direction.
    Type: Application
    Filed: December 1, 2021
    Publication date: June 9, 2022
    Applicant: TDK CORPORATION
    Inventors: Maiko SHIROKAWA, Shinji HARA, Naoki OHTA, Susumu AOKI, Eiji KOMURA
  • Patent number: 11257620
    Abstract: A dielectric film comprises a complex oxide represented by a general formula xAO-yBO-zC2O5 as a main component, wherein A is at least one selected from barium, calcium and strontium, B is at least one selected from magnesium and zinc, C is at least one selected from niobium and tantalum, x, y and z satisfy relations: x+y+z=1.000, 0.375?x?0.563, 0.250?y?0.500, and x/3?z?(x/3)+1/9, and in an X-ray diffraction chart of the dielectric film, a diffraction peak intensity of a (211) plane of the complex oxide or a diffraction peak intensity of a (222) plane of the complex oxide is larger than a diffraction peak intensity of a (110) plane of the complex oxide.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: February 22, 2022
    Assignee: TDK CORPORATION
    Inventors: Maiko Shirokawa, Raitarou Masaoka, Shohei Fujii, Yusuke Oba
  • Patent number: 11201013
    Abstract: A dielectric film comprises a complex oxide represented by a general formula xAO-yBO-zC2O5 as a main component, wherein A is at least one selected from barium, calcium and strontium, B is at least one selected from magnesium and zinc, C is at least one selected from niobium and tantalum, x, y and z satisfy relations: x+y+z=1.000, 0.375?x?0.563, 0.250?y?0.500, and x/3?z?(x/3)+1/9, and a full width at half maximum of a diffraction peak of a (110) plane of the complex oxide is 0.40° or more in an X-ray diffraction chart of the dielectric film.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: December 14, 2021
    Assignee: TDK CORPORATION
    Inventors: Yusuke Oba, Raitarou Masaoka, Shohei Fujii, Maiko Shirokawa
  • Publication number: 20200312557
    Abstract: A dielectric film comprises a complex oxide represented by a general formula xAO-yBO-zC2O5 as a main component, wherein A is at least one selected from barium, calcium and strontium, B is at least one selected from magnesium and zinc, C is at least one selected from niobium and tantalum, x, y and z satisfy relations: x+y+z=1.000, 0.375, 0.563, 0.250, 0.500, and x/3, (x/3)+ 1/9, and in an X-ray diffraction chart of the dielectric film, a diffraction peak intensity of a (211) plane of the complex oxide or a diffraction peak intensity of a (222) plane of the complex oxide is larger than a diffraction peak intensity of a (110) plane of the complex oxide.
    Type: Application
    Filed: March 25, 2020
    Publication date: October 1, 2020
    Applicant: TDK CORPORATION
    Inventors: Maiko SHIROKAWA, Raitarou MASAOKA, Shohei FUJII, Yusuke OBA
  • Publication number: 20200312558
    Abstract: A dielectric film comprises a complex oxide represented by a general formula xAO-yBO-zC2O5 as a main component, wherein A is at least one selected from barium, calcium and strontium, B is at least one selected from magnesium and zinc, C is at least one selected from niobium and tantalum, x, y and z satisfy relations: x+y+z=1.000, 0.375?x?0.563, 0.250?y?0.500, and x/3?z?(x/3)+1/9, and a full width at half maximum of a diffraction peak of a (110) plane of the complex oxide is 0.40° or more in an X-ray diffraction chart of the dielectric film.
    Type: Application
    Filed: March 26, 2020
    Publication date: October 1, 2020
    Applicant: TDK CORPORATION
    Inventors: Yusuke OBA, Raitarou MASAOKA, Shohei FUJII, Maiko SHIROKAWA
  • Patent number: 10121592
    Abstract: A dielectric thin film containing MgO as a main component, wherein the dielectric thin film is composed of a columnar structure group containing at least one columnar structure A constructed by single crystal and at least one columnar structure B constructed by polycrystal, respectively, and in the cross section of the direction perpendicular to the dielectric thin film, when the area occupied by the columnar structure A is set as CA and the area occupied by the columnar structure B is set as CB, the relationship between CA and CB satisfies 0.4?CB/CA?1.1.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: November 6, 2018
    Assignee: TDK CORPORATION
    Inventors: Maiko Shirokawa, Raitarou Masaoka, Hiroki Uchiyama, Shohei Fujii
  • Patent number: 10035711
    Abstract: A dielectric film containing an alkaline earth metal oxide having a NaCl type crystal structure as a main component, wherein the dielectric film has a (111)-oriented columnar structure in a direction perpendicular to the surface of the dielectric film, and in a Cu—K? X-ray diffraction chart of the dielectric film, a half width of the diffraction peak of (111) is in a range of from 0.3° to 2.0°.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: July 31, 2018
    Assignee: TDK CORPORATION
    Inventors: Hiroki Uchiyama, Raitarou Masaoka, Shohei Fujii, Maiko Shirokawa
  • Patent number: 9862646
    Abstract: A dielectric composition containing a complex oxide represented by the formula of A?B?C2?O?+?+5? as the main component, wherein A represents Ba, B represents at least one element selected from the group consisting of Ca and Sr, C represents at least one element selected from the group consisting of Ta and Nb, and ?, ? and ? meet the following conditions, i.e., ?+?+?=1.000, 0.000<??0.375, 0.625??<1.000, 0.000???0.375.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: January 9, 2018
    Assignee: TDK CORPORATION
    Inventors: Shohei Fujii, Raitarou Masaoka, Hiroki Uchiyama, Maiko Shirokawa