Patents by Inventor Takehisa Sasabayashi

Takehisa Sasabayashi 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).

  • Publication number: 20240274357
    Abstract: A multilayer ceramic capacitor includes outer electrodes at first and second end surfaces and coupled to inner electrode layers. Dielectric ceramic layers include crystal grains including a perovskite oxide. When a cross-section of the dielectric ceramic layers is observed using a scanning transmission electron microscope, the dielectric ceramic layers include grains, on which a plane of a perovskite structure is observed, as crystal grains. When a thickness of the dielectric ceramic layers is denoted by d, at least a subset of the grains is provided in near-electrode regions located inside the dielectric ceramic layers and extending to a distance of about 0.1 d from interfaces with adjacent inner electrode layers.
    Type: Application
    Filed: March 19, 2024
    Publication date: August 15, 2024
    Inventors: Hideyuki HASHIMOTO, Takehisa SASABAYASHI
  • Publication number: 20240222021
    Abstract: A multilayer ceramic capacitor includes a body including dielectric ceramic layers and inner electrode layers. The dielectric ceramic layers include crystal grains including a perovskite oxide including at least one A-site element and at least one B-site element. When a cross-section of the dielectric ceramic layers is observed using a scanning transmission electron microscope, the dielectric ceramic layers include grains, on which a plane of a perovskite structure is observed, as crystal grains. In the cross-section, a percentage by number of the grains in the crystal grains is about 4% or more.
    Type: Application
    Filed: March 19, 2024
    Publication date: July 4, 2024
    Inventors: Hideyuki HASHIMOTO, Takehisa SASABAYASHI
  • Publication number: 20240222022
    Abstract: A multilayer ceramic capacitor includes dielectric ceramic layers and inner electrode layers. The dielectric ceramic layers include crystal grains including a perovskite oxide including at least one A-site element and at least one B-site element. When a cross-section of the dielectric ceramic layers is observed using a scanning transmission electron microscope, the dielectric ceramic layers include grains, on which a plane of a perovskite structure is observed, as crystal grains. The grains, when subjected to compositional analysis by energy dispersive x-ray spectroscopy, have an atom-distributed region in which a concentration of the A-site element or B-site element (c) subtracted from a maximum concentration of the element (cmax) (?c=cmax?c) is about 2 atm % or less, at one or more atomic sites in the grains, and an area of the atom-distributed region (S?c?2%) is about 0.050 nm2 or less.
    Type: Application
    Filed: March 19, 2024
    Publication date: July 4, 2024
    Inventors: Hideyuki HASHIMOTO, Takehisa SASABAYASHI
  • Patent number: 11810724
    Abstract: A multilayer ceramic capacitor includes a base body including first and second main surfaces, first and second side surfaces, first and second end surfaces, and dielectric layers and internal electrode layers, and external electrodes at the first and second end surfaces, and electrically connected to the internal electrode layers. The base body includes an inner layer, first and second outer layers, first and second side margin portions. The dielectric layers in the inner layer and the first and second outer layers include main crystal grains including barium and titanium, and with respect to 100 parts by mol of titanium, nickel in an amount of about 0.2 to about 3.0 parts by mol, and at least one rare earth element selected from yttrium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium in an amount of about 0.6 parts to about 2.0 parts by mol.
    Type: Grant
    Filed: August 25, 2021
    Date of Patent: November 7, 2023
    Assignee: MURATA MANUFACTURING CO., LTD
    Inventors: Shinya Isota, Takehisa Sasabayashi, Kazuhisa Uchida, Hideyuki Hashimoto, Yuta Oshima
  • Patent number: 11532438
    Abstract: A multilayer electronic component includes a multilayer body including dielectric layers and inner electrode layers. Each of the dielectric layers includes first crystal grains defining and functioning as plate-shaped objects that have an average thickness of less than or equal to about 300 nm and an average aspect ratio of more than or equal to about 5, each of the inner electrode layers includes second crystal grains defining and functioning as plate-shaped objects that have an average thickness of less than or equal to about 150 nm and an average aspect ratio of more than or equal to about 5, where an aspect ratio is represented by a ratio of a major axis of each plate-shaped object to a thickness of the plate-shaped object with the major axis of the plate-shaped object being orthogonal or substantially orthogonal to a thickness direction of the plate-shaped object.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: December 20, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takehisa Sasabayashi, Kiyoshiro Ishibe, Kenji Ueno, Ai Fukumori, Akihiro Tsuru, Daisuke Hamada
  • Patent number: 11404213
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and layered internal electrodes, first and second main surfaces, first and second side surfaces, first and second end surfaces, and an external electrode connected to the internal electrodes and provided on each of the first and second end surfaces. A region where the internal electrodes are superimposed is defined as an effective region, regions respectively located on sides of the first and second end surfaces relative to the effective region are defined as first and second regions, and a bent portion where the dielectric layers and the internal electrodes are bent is located in the first region. In the bent portion, all vertices in the stacking direction are located within a range that extends by about 25 ?m to about 35 ?m in a length direction from the effective region of the multilayer body.
    Type: Grant
    Filed: August 24, 2020
    Date of Patent: August 2, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Shinichi Kokawa, Yasuyuki Shimada, Naoto Muranishi, Takehisa Sasabayashi
  • Patent number: 11398349
    Abstract: An end surface outer layer Mn/Ti peak intensity ratio, which is a ratio of a peak intensity of Mn found by laser ICP to a peak intensity of Ti found by laser ICP in a dielectric ceramic layer in an end surface outer layer portion, is higher than a central portion Mn/Ti peak intensity ratio, which is a ratio of a peak intensity of Mn found by laser ICP to a peak intensity of Ti found by laser ICP in the dielectric ceramic layer in a central portion in a width direction, a length direction, and a layering direction in an effective portion, and a peak intensity of Ni found by TEM-EDX is in a portion of the dielectric ceramic layers in the end surface outer layer portion.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: July 26, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
  • Patent number: 11380483
    Abstract: In a multilayer ceramic capacitor, when a ratio of an ICP peak intensity of Mn to an ICP peak intensity of Ti is an Mn/Ti peak intensity ratio, a value of the Mn/Ti peak intensity ratio in a dielectric ceramic layer in at least one of a main surface outer layer portion, a side surface outer layer portion, and an end surface outer layer portion is in a range of two times to fifteen times a value of the Mn/Ti peak intensity ratio in a dielectric ceramic layer in a central portion of an effective portion in a width direction, a length direction, and a stacking direction.
    Type: Grant
    Filed: December 23, 2020
    Date of Patent: July 5, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
  • Patent number: 11373805
    Abstract: An Mn/Ti peak intensity ratio in a dielectric ceramic layer in an end surface outer layer portion is within two times to fifteen times of the Mn/Ti peak intensity ratio in a central portion, a rare earth element/Ti peak intensity ratio in the dielectric ceramic layer in the end surface outer layer portion is within two times to seven times the rare earth element/Ti peak intensity ratio in the central portion, an Si/Ti peak intensity ratio in the dielectric ceramic layer in a side surface outer layer portion is within two times to five times the Si/Ti peak intensity ratio in the central portion, and the rare earth element/Ti peak intensity ratio in the dielectric ceramic layer in the side surface outer layer portion is within two times to seven times the rare earth element/Ti peak intensity ratio.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: June 28, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
  • Patent number: 11335509
    Abstract: A multilayer ceramic capacitor includes a ceramic body including a stack of dielectric layers and internal electrodes, and an external electrode electrically connected to each of the internal electrodes and provided at each of both end surfaces of the ceramic body. The external electrode includes a metal layer and a plating layer on the metal layer. In a cross section of the metal layer that is obtained by cutting the external electrode along a plane parallel to a side surface at a central position in a width direction, the metal layer includes a dielectric material at an area ratio of about 20% or more, and includes cavities at an area ratio of about 5% or more and about 20% or less, the cavities having an average diameter of about 0.5 ?m or more and about 1.5 ?m or less, and having a maximum diameter of about 5.0 ?m or less.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: May 17, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takehisa Sasabayashi, Akitaka Doi, Kotaro Shimizu, Yoko Okabe
  • Publication number: 20220102076
    Abstract: A multilayer ceramic capacitor includes a base body including first and second main surfaces, first and second side surfaces, first and second end surfaces, and dielectric layers and internal electrode layers, and external electrodes at the first and second end surfaces, and electrically connected to the internal electrode layers. The base body includes an inner layer, first and second outer layers, first and second side margin portions. The dielectric layers in the inner layer and the first and second outer layers include main crystal grains including barium and titanium, and with respect to 100 parts by mol of titanium, nickel in an amount of about 0.2 to about 3.0 parts by mol, and at least one rare earth element selected from yttrium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium in an amount of about 0.6 parts to about 2.0 parts by mol.
    Type: Application
    Filed: August 25, 2021
    Publication date: March 31, 2022
    Inventors: Shinya ISOTA, Takehisa SASABAYASHI, Kazuhisa UCHIDA, Hideyuki HASHIMOTO, Yuta OSHIMA
  • Patent number: 11239030
    Abstract: An electronic component includes a laminate including internal electrodes alternately laminated in a lamination direction with dielectric layers interposed therebetween. The laminate includes main surfaces opposite to each other in the lamination direction, side surfaces opposite to each other in a width direction, and end surfaces opposite to each other in a length direction, and external electrodes provided on surfaces of the laminate and electrically connected to the internal electrodes. Each of the dielectric layers includes Ti and Mg. When a cross section including the length direction and the width direction of the laminate is viewed from the lamination direction, side margin portions in which the internal electrodes do not exist each include a dielectric including Ti and Mg with a molar ratio in each of the side margin portions smaller than a molar ratio of Mg to Ti included in each of the dielectric layers.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: February 1, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hideyuki Hashimoto, Daiki Fukunaga, Takayuki Yao, Takehisa Sasabayashi
  • Patent number: 11201015
    Abstract: A multilayer electronic component having a plurality of laminated dielectric layers and inner electrode layers. The dielectric layers have a plurality of crystal grains including first regions where Re is dissolved in a solid state; and second regions where Re is not dissolved in the solid state. A median size of the crystal grains to an average thickness of the dielectric layers is 0.5?t?0.7. A ratio of a sum of cross sectional areas of the first regions to those of the plurality of crystal grains is 0.7?s?0.9. When a total amount of Ti, Zr, and Hf is 100 molar parts in the dielectric layers, a sum of the Zr and the Hf is 0?a?1.0; an amount b of Si is 0.1?b?1.0; an amount c of Re is 0.5?c?10.0; and a ratio m of a total of Ba and Re to a total of Ti, Zr, and Hf is 0.990?m?1.050.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: December 14, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takehisa Sasabayashi, Kenjiro Gomi, Kenji Kimura, Wataru Oshima
  • Publication number: 20210287854
    Abstract: An end surface outer layer Mn/Ti peak intensity ratio, which is a ratio of a peak intensity of Mn found by laser ICP to a peak intensity of Ti found by laser ICP in a dielectric ceramic layer in an end surface outer layer portion, is higher than a central portion Mn/Ti peak intensity ratio, which is a ratio of a peak intensity of Mn found by laser ICP to a peak intensity of Ti found by laser ICP in the dielectric ceramic layer in a central portion in a width direction, a length direction, and a layering direction in an effective portion, and a peak intensity of Ni found by TEM-EDX is in a portion of the dielectric ceramic layers in the end surface outer layer portion.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 16, 2021
    Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
  • Publication number: 20210287853
    Abstract: An Mn/Ti peak intensity ratio in a dielectric ceramic layer in an end surface outer layer portion is within two times to fifteen times of the Mn/Ti peak intensity ratio in a central portion, a rare earth element/Ti peak intensity ratio in the dielectric ceramic layer in the end surface outer layer portion is within two times to seven times the rare earth element/Ti peak intensity ratio in the central portion, an Si/Ti peak intensity ratio in the dielectric ceramic layer in a side surface outer layer portion is within two times to five times the Si/Ti peak intensity ratio in the central portion, and the rare earth element/Ti peak intensity ratio in the dielectric ceramic layer in the side surface outer layer portion is within two times to seven times the rare earth element/Ti peak intensity ratio.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 16, 2021
    Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
  • Publication number: 20210210285
    Abstract: In a multilayer ceramic capacitor, when a ratio of an ICP peak intensity of Mn to an ICP peak intensity of Ti is an Mn/Ti peak intensity ratio, a value of the Mn/Ti peak intensity ratio in a dielectric ceramic layer in at least one of a main surface outer layer portion, a side surface outer layer portion, and an end surface outer layer portion is in a range of two times to fifteen times a value of the Mn/Ti peak intensity ratio in a dielectric ceramic layer in a central portion of an effective portion in a width direction, a length direction, and a stacking direction.
    Type: Application
    Filed: December 23, 2020
    Publication date: July 8, 2021
    Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
  • Publication number: 20210074482
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and layered internal electrodes, first and second main surfaces, first and second side surfaces, first and second end surfaces, and an external electrode connected to the internal electrodes and provided on each of the first and second end surfaces. A region where the internal electrodes are superimposed is defined as an effective region, regions respectively located on sides of the first and second end surfaces relative to the effective region are defined as first and second regions, and a bent portion where the dielectric layers and the internal electrodes are bent is located in the first region. In the bent portion, all vertices in the stacking direction are located within a range that extends by about 25 ?m to about 35 ?m in a length direction from the effective region of the multilayer body.
    Type: Application
    Filed: August 24, 2020
    Publication date: March 11, 2021
    Inventors: Shinichi KOKAWA, Yasuyuki SHIMADA, Naoto MURANISHI, Takehisa SASABAYASHI
  • Publication number: 20210020380
    Abstract: A multilayer electronic component includes a multilayer body including dielectric layers and inner electrode layers. Each of the dielectric layers includes first crystal grains defining and functioning as plate-shaped objects that have an average thickness of less than or equal to about 300 nm and an average aspect ratio of more than or equal to about 5, each of the inner electrode layers includes second crystal grains defining and functioning as plate-shaped objects that have an average thickness of less than or equal to about 150 nm and an average aspect ratio of more than or equal to about 5, where an aspect ratio is represented by a ratio of a major axis of each plate-shaped object to a thickness of the plate-shaped object with the major axis of the plate-shaped object being orthogonal or substantially orthogonal to a thickness direction of the plate-shaped object.
    Type: Application
    Filed: July 16, 2020
    Publication date: January 21, 2021
    Inventors: Takehisa SASABAYASHI, Kiyoshiro ISHIBE, Kenji UENO, Ai FUKUMORI, Akihiro TSURU, Daisuke HAMADA
  • Publication number: 20210020376
    Abstract: A multilayer electronic component having a plurality of laminated dielectric layers and inner electrode layers. The dielectric layers have a plurality of crystal grains including first regions where Re is dissolved in a solid state; and second regions where Re is not dissolved in the solid state. A median size of the crystal grains to an average thickness of the dielectric layers is 0.5?t?0.7. A ratio of a sum of cross sectional areas of the first regions to those of the plurality of crystal grains is 0.7?s?0.9. When a total amount of Ti, Zr, and Hf is 100 molar parts in the dielectric layers, a sum of the Zr and the Hf is 0?a?1.0; an amount b of Si is 0.1?b?1.0; an amount c of Re is 0.5?c?10.0; and a ratio m of a total of Ba and Re to a total of Ti, Zr, and Hf is 0.990?m?1.050.
    Type: Application
    Filed: June 30, 2020
    Publication date: January 21, 2021
    Inventors: Takehisa Sasabayashi, Kenjiro Gomi, Kenji Kimura, Wataru Oshima
  • Publication number: 20200273623
    Abstract: A multilayer ceramic capacitor includes a ceramic body including a stack of dielectric layers and internal electrodes, and an external electrode electrically connected to each of the internal electrodes and provided at each of both end surfaces of the ceramic body. The external electrode includes a metal layer and a plating layer on the metal layer. In a cross section of the metal layer that is obtained by cutting the external electrode along a plane parallel to a side surface at a central position in a width direction, the metal layer includes a dielectric material at an area ratio of about 20% or more, and includes cavities at an area ratio of about 5% or more and about 20% or less, the cavities having an average diameter of about 0.5 ?m or more and about 1.5 ?m or less, and having a maximum diameter of about 5.0 ?m or less.
    Type: Application
    Filed: February 12, 2020
    Publication date: August 27, 2020
    Inventors: Takehisa SASABAYASHI, Akitaka DOI, Kotaro SHIMIZU, Yoko OKABE