Patents by Inventor Kota ZENZAI
Kota ZENZAI 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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Patent number: 11817266Abstract: A conductive paste includes a conductive metal powder and a curable resin. The conductive metal powder includes Ag, Cu, and Ni. In the conductive metal powder, a mass ratio of Ag is about 3.0 wt % or more and about 10.0 wt % or less, a mass ratio of Cu is about {(1?mass ratio of Ag/100)×70} wt % or more and about {(1?mass ratio of Ag/100)×95} wt % or less, and a mass ratio of Ni is about {(1?mass ratio of Ag/100)×5} wt % or more and about {(1?mass ratio of Ag/100)×30} wt % or less.Type: GrantFiled: March 2, 2022Date of Patent: November 14, 2023Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kenichi Hamanaka, Kota Zenzai
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Publication number: 20230230766Abstract: An outer electrode includes a glass-free sintered layer containing no glass. A glass-free conductive paste is provided and includes a conductive metal powder and a thermosetting resin, the conductive metal powder including an alloy of tin and at least one of copper and nickel, and the glass-free conductive paste containing no glass. This composition is applied to cover a portion of a surface of a ceramic body. Then the ceramic body to which the glass-free conductive paste has been applied is subjected to heat treatment at a temperature of about 600° C., higher than or equal to a temperature about 400° C. higher than the curing temperature of the thermosetting resin. By the heat treatment, the thermosetting resin is subjected to thermal decomposition or combustion and thus little of the thermosetting resin remains, and the conductive metal powder is sintered to form a unified sintered metal body.Type: ApplicationFiled: March 16, 2023Publication date: July 20, 2023Inventor: Kota ZENZAI
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Patent number: 11581137Abstract: A multilayer ceramic capacitor includes a ceramic base body including ceramic layers and internal electrode layers, which are stacked on each other, and a pair of external electrodes provided on the end surfaces of the ceramic base body and electrically connected to the internal electrode layers. Each of the external electrodes includes an underlying electrode layer and a resin external electrode layer stacked on the underlying electrode layer. The resin external electrode layer includes a thermosetting resin, a metal powder, and an alkyl-based silane coupling agent.Type: GrantFiled: June 10, 2020Date of Patent: February 14, 2023Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Kota Zenzai
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Publication number: 20220293345Abstract: A conductive paste includes a conductive metal powder and a curable resin. The conductive metal powder includes Ag, Cu, and Ni. In the conductive metal powder, a mass ratio of Ag is about 3.0 wt % or more and about 10.0 wt % or less, a mass ratio of Cu is about {(1?mass ratio of Ag/100)×70} wt % or more and about {(1?mass ratio of Ag/100)×95} wt % or less, and a mass ratio of Ni is about {(1?mass ratio of Ag/100)×5} wt % or more and about {(1?mass ratio of Ag/100)×30} wt % or less.Type: ApplicationFiled: March 2, 2022Publication date: September 15, 2022Inventors: Kenichi HAMANAKA, Kota ZENZAI
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Patent number: 11335501Abstract: A multilayer ceramic electronic component includes a multilayer body including a plurality of stacked ceramic layers and a plurality of stacked inner electrode layers, and outer electrodes on end surfaces of the multilayer body. The outer electrodes include underlying electrode layers on the end surfaces, conductive resin layers that cover the underlying electrode layers, and plating layers that cover the conductive resin layers. The underlying electrode layers are joined to the plating layers in connecting portions without the conductive resin layers interposed between the underlying electrode layers and the plating layers.Type: GrantFiled: June 10, 2020Date of Patent: May 17, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Kota Zenzai
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Patent number: 11205542Abstract: A multilayer ceramic electronic component includes a ceramic element assembly and outer electrodes provided on respective end surfaces of the ceramic element assembly. Each outer electrode includes an underlying electrode layer that is provided on the ceramic element assembly and that includes a sintered metal and glass and a conductive resin layer that is provided on the underlying electrode layer and that includes a metal filler and a resin. The underlying electrode layer satisfies at least one condition of a condition that a maximum exposure length of the glass exposed at the interface between the underlying electrode layer and the conductive resin layer is about 3.8 ?m or less and a condition that an exposure rate of the glass exposed at the interface between the underlying electrode layer and the conductive resin layer is about 10.1% or less.Type: GrantFiled: June 10, 2020Date of Patent: December 21, 2021Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kota Zenzai, Yosuke Terashita, Atsushi Nakamoto
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Publication number: 20210375545Abstract: A method for manufacturing a chip ceramic electronic component that includes an outer electrode including a glass-free sintered layer including no glass. A glass-free conductive paste including a nickel powder, a metal powder, such as tin, having a melting point of lower than about 500° C., and a thermosetting resin, and not including glass, is applied to cover a portion of a surface of a ceramic body. The ceramic body to which the glass-free conductive paste has been applied is subjected to a heat treatment at a temperature higher than or equal to a temperature about 400° C. higher than the curing temperature of the thermosetting resin. The thermosetting resin is thermally decomposed or burned such that little or none remains, and the nickel powder and metal powder having a melting point of lower than about 500° C. are sintered to form a unified sintered metal body.Type: ApplicationFiled: August 18, 2021Publication date: December 2, 2021Inventor: Kota ZENZAI
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Publication number: 20210375544Abstract: A method for manufacturing a chip ceramic electronic component that includes an outer electrode including a glass-free sintered layer including no glass is provided. A glass-free conductive paste including a copper-containing metal powder and a thermosetting resin, and not including glass, is applied to cover a portion of a surface of a ceramic body. Then the ceramic body to which the glass-free conductive paste has been applied is subjected to a heat treatment at a temperature higher than or equal to a temperature about 400° C. higher than the curing temperature of the thermosetting resin. By the heat treatment, the thermosetting resin is thermally decomposed or burned and thus the thermosetting resin does not remain, and the metal powder is sintered to form a unified sintered metal body.Type: ApplicationFiled: August 18, 2021Publication date: December 2, 2021Inventor: Kota ZENZAI
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Patent number: 11017950Abstract: A ceramic electronic component includes a ceramic body, an inner electrode, an outer electrode, and a connecting portion. The inner electrode is disposed inside the ceramic body. The end portion of the inner electrode extends to a surface of the ceramic body. The outer electrode is disposed on the surface of the ceramic body so as to cover the end portion of the inner electrode. The outer electrode includes a resin and a metal. The connecting portion is disposed so as to extend from an inside of the outer electrode to an inside of the ceramic body. In a portion of the surface of the ceramic body on which the outer electrode is disposed, the length of the connecting portion that extends in a direction in which the inner electrode is extends about 2.4 ?m or more.Type: GrantFiled: September 22, 2016Date of Patent: May 25, 2021Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kota Zenzai, Hisayoshi Omori, Takashi Kanayama, Kiyoyasu Sakurada, Naoki Shimizu, Seiji Katsuta, Shinji Otani
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Publication number: 20210057155Abstract: A multilayer ceramic electronic component includes a ceramic element assembly and outer electrodes provided on respective end surfaces of the ceramic element assembly. Each outer electrode includes an underlying electrode layer that is provided on the ceramic element assembly and that includes a sintered metal and glass and a conductive resin layer that is provided on the underlying electrode layer and that includes a metal filler and a resin. The underlying electrode layer satisfies at least one condition of a condition that a maximum exposure length of the glass exposed at the interface between the underlying electrode layer and the conductive resin layer is about 3.8 ?m or less and a condition that an exposure rate of the glass exposed at the interface between the underlying electrode layer and the conductive resin layer is about 10.1% or less.Type: ApplicationFiled: June 10, 2020Publication date: February 25, 2021Inventors: Kota ZENZAI, Yosuke TERASHITA, Atsushi NAKAMOTO
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Publication number: 20210057161Abstract: A multilayer ceramic electronic component includes a ceramic body and outer electrodes on two end surfaces of the ceramic body. Each of the outer electrodes includes a base electrode layer that is on the ceramic body and includes a sintered metal and glass, and a conductive resin layer that is on the base electrode layer and includes a metal filler and a resin. When a maximum thickness of the conductive resin layers that respectively lie on end surfaces of the ceramic body is denoted as T1 and when a maximum thickness of conductive resin layers adjacent to a first main surface and second main surface of the ceramic body or a first side surface or a second side surface of the ceramic body is denoted as T2, T1/T2 is about 2.4 or more.Type: ApplicationFiled: June 10, 2020Publication date: February 25, 2021Inventors: Kota ZENZAI, Yosuke TERASHITA
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Publication number: 20210057154Abstract: A multilayer ceramic electronic component includes a multilayer body including a plurality of stacked ceramic layers and a plurality of stacked inner electrode layers, and outer electrodes on end surfaces of the multilayer body. The outer electrodes include underlying electrode layers on the end surfaces, conductive resin layers that cover the underlying electrode layers, and plating layers that cover the conductive resin layers. The underlying electrode layers are joined to the plating layers in connecting portions without the conductive resin layers interposed between the underlying electrode layers and the plating layers.Type: ApplicationFiled: June 10, 2020Publication date: February 25, 2021Inventor: Kota ZENZAI
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Publication number: 20210050152Abstract: A multilayer ceramic capacitor includes a ceramic base body including ceramic layers and internal electrode layers, which are stacked on each other, and a pair of external electrodes provided on the end surfaces of the ceramic base body and electrically connected to the internal electrode layers. Each of the external electrodes includes an underlying electrode layer and a resin external electrode layer stacked on the underlying electrode layer. The resin external electrode layer includes a thermosetting resin, a metal powder, and an alkyl-based silane coupling agent.Type: ApplicationFiled: June 10, 2020Publication date: February 18, 2021Inventor: Kota ZENZAI
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Patent number: 10453613Abstract: A conductive resin paste that includes a conductive component and a resin component, where the conductive component includes at least Ag and Cu, and the proportion of the Ag to the total amount of the Ag and Cu included in the conductive component falls within the range of 11.6 mass % to 28.8 mass %. As the conductive component, an Ag-coated Cu powder is used which has a Cu powder with a surface at least partially coated with Ag.Type: GrantFiled: June 10, 2015Date of Patent: October 22, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kota Zenzai, Yosuke Terashita
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Patent number: 10283273Abstract: A ceramic electronic component includes a rectangular or substantially rectangular parallelepiped-shaped stack in which a ceramic layer and an internal electrode are alternately stacked and an external electrode provided on a portion of a surface of the stack and electrically connected to the internal electrode. The external electrode includes an inner external electrode covering a portion of the surface of the stack and including a mixture of a resin component and a metal component and an outer external electrode covering the inner external electrode and including a metal component. A volume occupied by the resin component in the inner external electrode is within a prescribed range.Type: GrantFiled: January 30, 2017Date of Patent: May 7, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kenichi Hamanaka, Kota Zenzai, Taku Dekura, Kiyotaka Maegawa
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Patent number: 10242802Abstract: An electronic component body includes an internal electrode that is partially extended to a surface of the electronic component body and is connected to an external electrode including a conductive material-containing resin layer including a conductive material and a resin layer and a plated layer covering the conductive material-containing resin layer. The conductive material-containing resin layer includes metal particles as the conductive material, and the plated layer extends from the surface of the conductive material-containing resin layer into the conductive material-containing resin layer such that the plated layer coats at least some of the metal particles.Type: GrantFiled: October 5, 2016Date of Patent: March 26, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Kota Zenzai
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Patent number: 10062514Abstract: In a multilayer ceramic capacitor, outer electrodes include base electrode layers including a conductive metal and a glass component on a ceramic multilayer body, conductive resin layers including a thermosetting resin and a metal component on the base electrode layers such that exposed portions of the base electrode layers are exposed at least at one corner on one end surface side of the ceramic multilayer body and at least at one corner on the other end surface side thereof, and plating layers on the conductive resin layers and the exposed portions of the base electrode layers. The exposed portions of the base electrode layers are in direct contact with the plating layers at least at one corner on the one end surface side of the ceramic multilayer body and at least at one corner on the other end surface side thereof.Type: GrantFiled: April 11, 2017Date of Patent: August 28, 2018Assignee: Murata Manufacturing Co., Ltd.Inventors: Seiji Katsuta, Yosuke Terashita, Takayoshi Yamamoto, Atsushi Ishida, Kota Zenzai
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Patent number: 10008331Abstract: A multilayer ceramic electronic component includes a ceramic element body including internal electrodes and external electrodes electrically connected to respective internal electrodes. Each of the external electrodes includes a sintered metal layer including glass and metal and a conductive resin layer including resin and metal particles. In a cross section of the multilayer ceramic capacitor, at an interface between the sintered metal layer and the conductive resin layer, recesses having a shape in which a dimension of an inner portion is larger than a dimension of an inlet are present, and L1/L2 is about 0.2 or more and about 1.5 or less, where L1 is a length along the interface at which the glass of the sintered metal layer is exposed at the interface, and L2 is a length along the interface at which the metal of the sintered metal layer is exposed at the interface.Type: GrantFiled: November 8, 2016Date of Patent: June 26, 2018Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Ikeda, Kota Zenzai
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Patent number: 9941049Abstract: A multilayer ceramic capacitor includes a ceramic element body including internal electrodes therein. External electrodes are provided on end surfaces of the ceramic element body and electrically connected to exposed portions of respective ones of the internal electrodes. Each of the external electrodes includes a sintered metal layer, a conductive resin layer, and a plating layer.Type: GrantFiled: March 26, 2015Date of Patent: April 10, 2018Assignee: Murata Manufacturing Co., Ltd.Inventors: Kenichi Hamanaka, Hidetaka Sugiyama, Kota Zenzai
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Patent number: 9799452Abstract: A ceramic electronic component includes a rectangular or substantially rectangular parallelepiped-shaped stack in which a ceramic layer and an internal electrode are alternately stacked and an external electrode provided on a portion of a surface of the stack and electrically connected to the internal electrode. The external electrode includes an inner external electrode covering a portion of the surface of the stack and including a mixture of a resin component and a metal component and an outer external electrode covering the inner external electrode and including a metal component. The inner external electrode includes a plurality of holes. An average opening diameter of the plurality of holes is not greater than about 2.5 ?m. Some or all of the plurality of holes are embedded with the metal component of the outer external electrode.Type: GrantFiled: June 16, 2014Date of Patent: October 24, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kenichi Hamanaka, Kota Zenzai, Taku Dekura, Kiyotaka Maegawa