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).
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Publication number: 20240274357Abstract: 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: ApplicationFiled: March 19, 2024Publication date: August 15, 2024Inventors: Hideyuki HASHIMOTO, Takehisa SASABAYASHI
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Publication number: 20240222021Abstract: 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: ApplicationFiled: March 19, 2024Publication date: July 4, 2024Inventors: Hideyuki HASHIMOTO, Takehisa SASABAYASHI
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Publication number: 20240222022Abstract: 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: ApplicationFiled: March 19, 2024Publication date: July 4, 2024Inventors: Hideyuki HASHIMOTO, Takehisa SASABAYASHI
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Patent number: 11810724Abstract: 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: GrantFiled: August 25, 2021Date of Patent: November 7, 2023Assignee: MURATA MANUFACTURING CO., LTDInventors: Shinya Isota, Takehisa Sasabayashi, Kazuhisa Uchida, Hideyuki Hashimoto, Yuta Oshima
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Patent number: 11532438Abstract: 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: GrantFiled: July 16, 2020Date of Patent: December 20, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takehisa Sasabayashi, Kiyoshiro Ishibe, Kenji Ueno, Ai Fukumori, Akihiro Tsuru, Daisuke Hamada
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Patent number: 11404213Abstract: 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: GrantFiled: August 24, 2020Date of Patent: August 2, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Shinichi Kokawa, Yasuyuki Shimada, Naoto Muranishi, Takehisa Sasabayashi
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Patent number: 11398349Abstract: 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: GrantFiled: March 1, 2021Date of Patent: July 26, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
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Patent number: 11380483Abstract: 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: GrantFiled: December 23, 2020Date of Patent: July 5, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
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Patent number: 11373805Abstract: 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: GrantFiled: March 1, 2021Date of Patent: June 28, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
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Patent number: 11335509Abstract: 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: GrantFiled: February 12, 2020Date of Patent: May 17, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takehisa Sasabayashi, Akitaka Doi, Kotaro Shimizu, Yoko Okabe
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Publication number: 20220102076Abstract: 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: ApplicationFiled: August 25, 2021Publication date: March 31, 2022Inventors: Shinya ISOTA, Takehisa SASABAYASHI, Kazuhisa UCHIDA, Hideyuki HASHIMOTO, Yuta OSHIMA
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Patent number: 11239030Abstract: 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: GrantFiled: September 11, 2019Date of Patent: February 1, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Hideyuki Hashimoto, Daiki Fukunaga, Takayuki Yao, Takehisa Sasabayashi
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Patent number: 11201015Abstract: 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: GrantFiled: June 30, 2020Date of Patent: December 14, 2021Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takehisa Sasabayashi, Kenjiro Gomi, Kenji Kimura, Wataru Oshima
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Publication number: 20210287854Abstract: 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: ApplicationFiled: March 1, 2021Publication date: September 16, 2021Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
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Publication number: 20210287853Abstract: 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: ApplicationFiled: March 1, 2021Publication date: September 16, 2021Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
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Publication number: 20210210285Abstract: 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: ApplicationFiled: December 23, 2020Publication date: July 8, 2021Inventors: Takehisa Sasabayashi, Yasuyuki Shimada, Naoto Muranishi, Shinichi Kokawa
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Publication number: 20210074482Abstract: 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: ApplicationFiled: August 24, 2020Publication date: March 11, 2021Inventors: Shinichi KOKAWA, Yasuyuki SHIMADA, Naoto MURANISHI, Takehisa SASABAYASHI
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Publication number: 20210020380Abstract: 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: ApplicationFiled: July 16, 2020Publication date: January 21, 2021Inventors: Takehisa SASABAYASHI, Kiyoshiro ISHIBE, Kenji UENO, Ai FUKUMORI, Akihiro TSURU, Daisuke HAMADA
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Publication number: 20210020376Abstract: 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: ApplicationFiled: June 30, 2020Publication date: January 21, 2021Inventors: Takehisa Sasabayashi, Kenjiro Gomi, Kenji Kimura, Wataru Oshima
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Publication number: 20200273623Abstract: 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: ApplicationFiled: February 12, 2020Publication date: August 27, 2020Inventors: Takehisa SASABAYASHI, Akitaka DOI, Kotaro SHIMIZU, Yoko OKABE