Patents by Inventor Seiji KATSUTA

Seiji KATSUTA 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: 11017950
    Abstract: 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: Grant
    Filed: September 22, 2016
    Date of Patent: May 25, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kota Zenzai, Hisayoshi Omori, Takashi Kanayama, Kiyoyasu Sakurada, Naoki Shimizu, Seiji Katsuta, Shinji Otani
  • Patent number: 10840008
    Abstract: An electronic component includes an electronic component body and an external electrode. The external electrode is disposed on the electronic component body. The external electrode includes a Pd plating layer and a Ni plating layer. The Pd plating layer defines an outermost layer. The Ni plating layer is disposed inside the Pd plating layer. The Ni plating layer is partly exposed from the Pd plating layer.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: November 17, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Yasuaki Kainuma, Seiji Katsuta, Akihiro Motoki
  • Patent number: 10615327
    Abstract: A monolithic ceramic electronic component includes a ceramic body including a stack of ceramic layers. Inner electrodes are disposed within the ceramic body and include exposed portions at the end surfaces of the ceramic body. A pair of outer electrodes is arranged on the end surfaces of the ceramic body so as to extend from the end surfaces to the main surfaces and side surfaces of the ceramic body. Each of the outer electrodes includes a lower electrode layer provided on the ceramic body, an intermediate electrode layer located on the lower electrode layer and defined by a plated Ni layer, and an upper electrode layer located on the intermediate electrode layer and defined by a plated Pd layer. A thickness of the intermediate electrode layer on the main surfaces and the side surfaces of the ceramic body is larger than a thickness of the intermediate electrode layer on the end surfaces of the ceramic body.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: April 7, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Seiji Katsuta, Yasuaki Kainuma, Tatsuya Nagaoka, Akihiro Motoki, Satoshi Kodama
  • Patent number: 10347426
    Abstract: An external electrode includes an underlying electrode layer on an end surface of a ceramic body and connected to an internal electrode, an external electrode layer located outside the underlying electrode layer, and an intermediate electrode layer including at least a portion between the underlying electrode layer and the external electrode layer. The intermediate electrode layer includes a conductive resin, and the underlying electrode layer and the external electrode layer include a material lower in electrical resistivity than the conductive resin. The intermediate electrode layer entirely or substantially entirely covers the end surfaces and extends from the end surfaces to portions, respectively, of one main surface, and the underlying electrode layer is partially exposed from the intermediate electrode layer to include an exposed surface and is in surface-contact with the external electrode layer at the exposed surface.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: July 9, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazunori Egashira, Kazunori Kunimoto, Seiji Katsuta, Yosuke Terashita, Takayoshi Yamamoto
  • Patent number: 10269491
    Abstract: A ceramic electronic component includes an electronic component body, an inner electrode, and an outer electrode. The outer electrode includes a fired electrode layer and first and second plated layers. The fired electrode layer is disposed on the electronic component body. The first plated layer is disposed on the fired electrode layer. The thickness of the first plated layer is about 3 ?m to about 8 ?m, for example. The first plated layer contains nickel. The second plated layer is disposed on the first plated layer. The thickness of the second plated layer is about 0.025 ?m to about 1 ?m, for example. The second plated layer contains lead.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: April 23, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Satoshi Kodama, Seiji Katsuta
  • Patent number: 10062514
    Abstract: 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: Grant
    Filed: April 11, 2017
    Date of Patent: August 28, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Seiji Katsuta, Yosuke Terashita, Takayoshi Yamamoto, Atsushi Ishida, Kota Zenzai
  • Publication number: 20180068792
    Abstract: An external electrode includes an underlying electrode layer on an end surface of a ceramic body and connected to an internal electrode, an external electrode layer located outside the underlying electrode layer, and an intermediate electrode layer including at least a portion between the underlying electrode layer and the external electrode layer. The intermediate electrode layer includes a conductive resin, and the underlying electrode layer and the external electrode layer include a material lower in electrical resistivity than the conductive resin. The intermediate electrode layer entirely or substantially entirely covers the end surfaces and extends from the end surfaces to portions, respectively, of one main surface, and the underlying electrode layer is partially exposed from the intermediate electrode layer to include an exposed surface and is in surface-contact with the external electrode layer at the exposed surface.
    Type: Application
    Filed: April 6, 2017
    Publication date: March 8, 2018
    Inventors: Kazunori EGASHIRA, Kazunori KUNIMOTO, Seiji KATSUTA, Yosuke TERASHITA, Takayoshi YAMAMOTO
  • Publication number: 20170294268
    Abstract: 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: Application
    Filed: April 11, 2017
    Publication date: October 12, 2017
    Inventors: Seiji KATSUTA, Yosuke TERASHITA, Takayoshi YAMAMOTO, Atsushi ISHIDA, Kota ZENZAI
  • Patent number: 9779876
    Abstract: A ceramic body is prepared that includes an inner electrode disposed inside the ceramic body and in which an end portion of the inner electrode is led to a surface of the ceramic body. An electrode layer is formed on the surface of the ceramic body so as to cover the end portion of the inner electrode, the electrode layer containing a resin, a first metal filler that contains a first metal component, and a second metal filler that contains a second metal component having a higher melting point than the first metal component. A heating step of heating the electrode layer is performed to form an electrode including a metal layer that is located on the surface of the ceramic body and that contains the first and second metal components and a metal contained in the inner electrode.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: October 3, 2017
    Assignee: Murata Manufactruing Co., Ltd.
    Inventors: Kota Zenzai, Hisayoshi Omori, Takashi Kanayama, Kiyoyasu Sakurada, Naoki Shimizu, Seiji Katsuta, Shinji Otani
  • Publication number: 20170222117
    Abstract: A monolithic ceramic electronic component includes a ceramic body including a stack of ceramic layers. Inner electrodes are disposed within the ceramic body and include exposed portions at the end surfaces of the ceramic body. A pair of outer electrodes is arranged on the end surfaces of the ceramic body so as to extend from the end surfaces to the main surfaces and side surfaces of the ceramic body. Each of the outer electrodes includes a lower electrode layer provided on the ceramic body, an intermediate electrode layer located on the lower electrode layer and defined by a plated Ni layer, and an upper electrode layer located on the intermediate electrode layer and defined by a plated Pd layer. A thickness of the intermediate electrode layer on the main surfaces and the side surfaces of the ceramic body is larger than a thickness of the intermediate electrode layer on the end surfaces of the ceramic body.
    Type: Application
    Filed: April 18, 2017
    Publication date: August 3, 2017
    Inventors: Seiji KATSUTA, Yasuaki KAINUMA, Tatsuya NAGAOKA, Akihiro MOTOKI, Satoshi KODAMA
  • Patent number: 9659689
    Abstract: A monolithic ceramic electronic component includes a ceramic body including a stack of ceramic layers. Inner electrodes are disposed within the ceramic body and include exposed portions at the end surfaces of the ceramic body. A pair of outer electrodes is arranged on the end surfaces of the ceramic body so as to extend from the end surfaces to the main surfaces and side surfaces of the ceramic body. Each of the outer electrodes includes a lower electrode layer provided on the ceramic body, an intermediate electrode layer located on the lower electrode layer and defined by a plated Ni layer, and an upper electrode layer located on the intermediate electrode layer and defined by a plated Pd layer. A thickness of the intermediate electrode layer on the main surfaces and the side surfaces of the ceramic body is larger than a thickness of the intermediate electrode layer on the end surfaces of the ceramic body.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: May 23, 2017
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Seiji Katsuta, Yasuaki Kainuma, Tatsuya Nagaoka, Akihiro Motoki, Satoshi Kodama
  • Publication number: 20170011853
    Abstract: 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: Application
    Filed: September 22, 2016
    Publication date: January 12, 2017
    Inventors: Kota ZENZAI, Hisayoshi OMORI, Takashi KANAYAMA, Kiyoyasu SAKURADA, Naoki SHIMIZU, Seiji KATSUTA, Shinji OTANI
  • Patent number: 9490055
    Abstract: 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: Grant
    Filed: November 2, 2011
    Date of Patent: November 8, 2016
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kota Zenzai, Hisayoshi Omori, Takashi Kanayama, Kiyoyasu Sakurada, Naoki Shimizu, Seiji Katsuta, Shinji Otani
  • Patent number: 9406443
    Abstract: In a ceramic electronic component, when a distance between a first end surface and an edge of a portion of a first baked electrode layer disposed on a second principal surface in a length direction is A, a distance between the first end surface and an effective region in the length direction is B, and a distance between the first end surface and an edge of a portion of a first resin-containing electrode layer disposed on the second principal surface in the length direction is C, A<B<C is satisfied and A/B is about 0.86 or less.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: August 2, 2016
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Seiji Katsuta
  • Publication number: 20160212850
    Abstract: An electronic component includes an electronic component body and an external electrode. The external electrode is disposed on the electronic component body. The external electrode includes a Pd plating layer and a Ni plating layer. The Pd plating layer defines an outermost layer. The Ni plating layer is disposed inside the Pd plating layer. The Ni plating layer is partly exposed from the Pd plating layer.
    Type: Application
    Filed: January 6, 2016
    Publication date: July 21, 2016
    Inventors: Yasuaki KAINUMA, Seiji KATSUTA, Akihiro MOTOKI
  • Publication number: 20160042871
    Abstract: A ceramic body is prepared that includes an inner electrode disposed inside the ceramic body and in which an end portion of the inner electrode is led to a surface of the ceramic body. An electrode layer is formed on the surface of the ceramic body so as to cover the end portion of the inner electrode, the electrode layer containing a resin, a first metal filler that contains a first metal component, and a second metal filler that contains a second metal component having a higher melting point than the first metal component. A heating step of heating the electrode layer is performed to form an electrode including a metal layer that is located on the surface of the ceramic body and that contains the first and second metal components and a metal contained in the inner electrode.
    Type: Application
    Filed: October 26, 2015
    Publication date: February 11, 2016
    Inventors: Kota ZENZAI, Hisayoshi OMORI, Takashi KANAYAMA, Kiyoyasu SAKURADA, Naoki SHIMIZU, Seiji KATSUTA, Shinji OTANI
  • Publication number: 20160020028
    Abstract: In a ceramic electronic component, when a distance between a first end surface and an edge of a portion of a first baked electrode layer disposed on a second principal surface in a length direction is A, a distance between the first end surface and an effective region in the length direction is B, and a distance between the first end surface and an edge of a portion of a first resin-containing electrode layer disposed on the second principal surface in the length direction is C, A<B<C is satisfied and A/B is about 0.86 or less.
    Type: Application
    Filed: September 25, 2014
    Publication date: January 21, 2016
    Inventor: Seiji KATSUTA
  • Publication number: 20150380164
    Abstract: A ceramic electronic component includes an electronic component body, an inner electrode, and an outer electrode. The outer electrode includes a fired electrode layer and first and second plated layers. The fired electrode layer is disposed on the electronic component body. The first plated layer is disposed on the fired electrode layer. The thickness of the first plated layer is about 3 ?m to about 8 ?m, for example. The first plated layer contains nickel. The second plated layer is disposed on the first plated layer. The thickness of the second plated layer is about 0.025 ?m to about 1 ?m, for example. The second plated layer contains lead.
    Type: Application
    Filed: June 19, 2015
    Publication date: December 31, 2015
    Inventors: Satoshi KODAMA, Seiji KATSUTA
  • Patent number: 9202640
    Abstract: A ceramic body includes an inner electrode disposed inside the ceramic body and in which an end portion of the inner electrode extends to a surface of the ceramic body. An electrode layer is formed on the surface of the ceramic body so as to cover the end portion of the inner electrode, the electrode layer including a resin, a first metal filler that contains a first metal component, and a second metal filler that contains a second metal component having a higher melting point than the first metal component. A step of heating the electrode layer is performed to form an electrode including a metal layer that is located on the surface of the ceramic body and that includes the first and second metal components and a metal contained in the inner electrode.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: December 1, 2015
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kota Zenzai, Hisayoshi Omori, Takashi Kanayama, Kiyoyasu Sakurada, Naoki Shimizu, Seiji Katsuta, Shinji Otani
  • Patent number: 8988855
    Abstract: A ceramic electronic component includes a ceramic body and an outer electrode. The outer electrode is disposed on the ceramic body. The outer electrode includes a first conductive layer and a second conductive layer. The first conductive layer includes a resin, a first metal component, and a second metal component having a higher melting point than the first metal component. The second conductive layer is disposed on the first conductive layer. The second conductive layer is includes a plating film. An alloy particle containing the first metal component and the second metal component protrudes to the second conductive layer side from a surface of the first conductive layer.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: March 24, 2015
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kiyoyasu Sakurada, Kota Zenzai, Hisayoshi Omori, Takashi Kanayama, Shinji Otani, Naoki Shimizu, Seiji Katsuta