Patents by Inventor Riyousuke AKAZAWA

Riyousuke AKAZAWA 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: 20240105391
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrode layers alternately laminated therein, base electrode layers respectively provided on both end surfaces of the multilayer body in a length direction intersecting a lamination direction, and each connected to the internal electrode layers and each including glass and copper, and plated layers respectively provided on an outer side of the base electrode layers. A protective layer including sulfur is provided between the glass included in the base electrode layers and the plated layers.
    Type: Application
    Filed: November 30, 2023
    Publication date: March 28, 2024
    Inventors: Keita KITAHARA, Yuta SAITO, Noriyuki OOKAWA, Riyousuke AKAZAWA, Takefumi TAKAHASHI, Masahiro WAKASHIMA, Yuta KUROSU, Akito MORI
  • Publication number: 20240029958
    Abstract: A multilayer ceramic capacitor includes a multilayer body including an inner layer portion including dielectric layers and internal electrode layers alternately laminated therein, two outer layer portions respectively provided on both sides of the inner layer portion in a lamination direction, and two side gap portions respectively provided on both side surfaces of the inner layer portion and the outer layer portions, in a width direction intersecting the lamination direction, and external electrodes respectively provided on both end surfaces of the multilayer body in a length direction intersecting the lamination direction and the width direction, and each connected to the internal electrode layers, wherein nickel and magnesium are segregated between the side gap portions and the outer layer portions.
    Type: Application
    Filed: October 2, 2023
    Publication date: January 25, 2024
    Inventors: Keita KITAHARA, Yuta SAITO, Noriyuki OOKAWA, Riyousuke AKAZAWA, Takefumi TAKAHASHI, Masahiro WAKASHIMA, Yuta KUROSU, Akito MORI
  • Patent number: 11862402
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrode layers alternately laminated therein, base electrode layers respectively provided on both end surfaces of the multilayer body in a length direction intersecting a lamination direction, and each connected to the internal electrode layers and each including glass and copper, and plated layers respectively provided on an outer side of the base electrode layers. A protective layer including sulfur is provided between the glass included in the base electrode layers and the plated layers.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: January 2, 2024
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Keita Kitahara, Yuta Saito, Noriyuki Ookawa, Riyousuke Akazawa, Takefumi Takahashi, Masahiro Wakashima, Yuta Kurosu, Akito Mori
  • Publication number: 20230360856
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrode layers alternately laminated therein, and external electrode layers respectively provided on both end surfaces of the multilayer body in a length direction intersecting a lamination direction, and each connected to the internal electrode layers, the external electrode layers each further including a base electrode layer including a first region, a second region, and a third region divided therein, in order from the multilayer body. The first region includes a metal included in the internal electrode layers in a higher amount than the second region and the third region, the second region includes glass in a higher amount than the first region and the third region, and the third region includes copper in a higher amount than the first region and the second region.
    Type: Application
    Filed: July 5, 2023
    Publication date: November 9, 2023
    Inventors: Keita KITAHARA, Yuta SAITO, Noriyuki OOKAWA, Riyousuke AKAZAWA, Takefumi TAKAHASHI, Masahiro WAKASHIMA, Yuta KUROSU, Akito MORI
  • Patent number: 11810725
    Abstract: A multilayer ceramic capacitor includes a multilayer body including an inner layer portion including dielectric layers and internal electrode layers alternately laminated therein, two outer layer portions respectively provided on both sides of the inner layer portion in a lamination direction, and two side gap portions respectively provided on both side surfaces of the inner layer portion and the outer layer portions, in a width direction intersecting the lamination direction, and external electrodes respectively provided on both end surfaces of the multilayer body in a length direction intersecting the lamination direction and the width direction, and each connected to the internal electrode layers, wherein nickel and magnesium are segregated between the side gap portions and the outer layer portions.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: November 7, 2023
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Keita Kitahara, Yuta Saito, Noriyuki Ookawa, Riyousuke Akazawa, Takefumi Takahashi, Masahiro Wakashima, Yuta Kurosu, Akito Mori
  • Publication number: 20230352243
    Abstract: In a multilayer ceramic capacitor, a positional deviation in a lamination direction between end portions in a width direction intersecting the lamination direction and a length direction, of two of internal electrode layers adjacent to each other in the lamination direction, is about 5 ?m or less. A connection ratio N1/N0 at the middle portion thereof, and a connection ratio N2/N0 at the end portion thereof are about 90% or more, respectively, and a difference between N1/N0 and N2/N0 is about 10% or less.
    Type: Application
    Filed: July 5, 2023
    Publication date: November 2, 2023
    Inventors: Keita KITAHARA, Yuta SAITO, Noriyuki OOKAWA, Riyousuke AKAZAWA, Takefumi TAKAHASHI, Masahiro WAKASHIMA, Yuta KUROSU, Akito MORI
  • Patent number: 11735368
    Abstract: In a multilayer ceramic capacitor, a positional deviation in a lamination direction between end portions in a width direction intersecting the lamination direction and a length direction, of two of internal electrode layers adjacent to each other in the lamination direction, is about 5 ?m or less. A connection ratio N1/N0 at the middle portion thereof, and a connection ratio N2/N0 at the end portion thereof are about 90% or more, respectively, and a difference between N1/N0 and N2/N0 is about 10% or less.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: August 22, 2023
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Keita Kitahara, Yuta Saito, Noriyuki Ookawa, Riyousuke Akazawa, Takefumi Takahashi, Masahiro Wakashima, Yuta Kurosu, Akito Mori
  • Patent number: 11735369
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrode layers alternately laminated therein, and external electrode layers respectively provided on both end surfaces of the multilayer body in a length direction intersecting a lamination direction, and each connected to the internal electrode layers, the external electrode layers each further including a base electrode layer including a first region, a second region, and a third region divided therein, in order from the multilayer body. The first region includes a metal included in the internal electrode layers in a higher amount than the second region and the third region, the second region includes glass in a higher amount than the first region and the third region, and the third region includes copper in a higher amount than the first region and the second region.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: August 22, 2023
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Keita Kitahara, Yuta Saito, Noriyuki Ookawa, Riyousuke Akazawa, Takefumi Takahashi, Masahiro Wakashima, Yuta Kurosu, Akito Mori
  • Publication number: 20230197346
    Abstract: A multilayer ceramic capacitor includes a multilayer body including internal electrode layers and internal dielectric layers alternatively laminated, main surfaces on both sides in a lamination direction, end surfaces on both sides in a length direction intersecting the lamination direction, and lateral surfaces on both sides in a width direction intersecting the lamination direction and the length direction, and external electrodes on the end surfaces of the multilayer body. The external electrodes each include a base electrode layer including a Cu region including Cu as a main component and at least one glass region including Si as a main component, and a plated layer covering the base electrode layer. On a surface of the base electrode layer covered by the plated layer, at least one glass region protrudes from the Cu region.
    Type: Application
    Filed: December 15, 2022
    Publication date: June 22, 2023
    Inventors: Keita KITAHARA, Riyousuke AKAZAWA, Takefumi TAKAHASHI
  • Publication number: 20230197350
    Abstract: A multilayer ceramic capacitor includes a multilayer body including internal electrode layers and internal dielectric layers alternatively laminated therein, main surfaces on both sides in a lamination direction, end surfaces on both sides in a length direction intersecting the lamination direction, and lateral surfaces on both sides in a width direction intersecting the lamination direction and the length direction, and two external electrodes on the end surfaces of the multilayer body and including base electrode layers. The base electrode layers include an end surface portion on the end surface, and an outer peripheral portion on the main surface and the lateral surface, and the outer peripheral surface portion includes first, second, and third portions respectively having thicknesses t1, t2, and t3 in this order from the end surface toward a center in the length direction, and the relationship of t1>t2>t3 is satisfied.
    Type: Application
    Filed: December 15, 2022
    Publication date: June 22, 2023
    Inventors: Keita KITAHARA, Riyousuke AKAZAWA, Takefumi TAKAHASHI
  • Publication number: 20230197345
    Abstract: A multilayer ceramic capacitor includes a multilayer body including internal electrode layers and internal dielectric layers alternately laminated therein, main surfaces on both sides in a lamination direction, end surfaces on both sides in a length direction intersecting the lamination direction, and lateral surfaces on both sides in a width direction intersecting the lamination direction and the length direction, and two external electrodes on the end surfaces of the multilayer body. The two external electrodes each include a central portion having a thickness L1, and located at a center or approximate center in the lamination direction and at a center or approximate center in the width direction, and an outer peripheral portion surrounding the central portion and having a thickness L2, where a relationship therebetween is L1<L2.
    Type: Application
    Filed: December 15, 2022
    Publication date: June 22, 2023
    Inventors: Keita KITAHARA, Riyousuke AKAZAWA, Takefumi TAKAHASHI
  • Publication number: 20230197339
    Abstract: A multilayer ceramic capacitor includes a multilayer body including internal electrode layers and internal dielectric layers alternatively laminated therein, main surfaces on both sides in a lamination direction, end surfaces on both sides in a length direction intersecting the lamination direction, and lateral surfaces on both sides in a width direction intersecting the lamination direction and the length direction, and two external electrodes on the end surfaces of the multilayer body, wherein the two external electrodes each include a base electrode layer including a Cu region and a glass region respectively including Cu and Si as a main component, and a Cu-plated layer outside the base electrode layer, and the glass region of the base electrode layer includes a Cu-including glass region including Cu.
    Type: Application
    Filed: December 15, 2022
    Publication date: June 22, 2023
    Inventors: Keita KITAHARA, Riyousuke AKAZAWA, Takefumi TAKAHASHI
  • Publication number: 20220102079
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrode layers alternately laminated therein, and external electrode layers respectively provided on both end surfaces of the multilayer body in a length direction intersecting a lamination direction, and each connected to the internal electrode layers, the external electrode layers each further including a base electrode layer including a first region, a second region, and a third region divided therein, in order from the multilayer body. The first region includes a metal included in the internal electrode layers in a higher amount than the second region and the third region, the second region includes glass in a higher amount than the first region and the third region, and the third region includes copper in a higher amount than the first region and the second region.
    Type: Application
    Filed: September 28, 2021
    Publication date: March 31, 2022
    Inventors: Keita KITAHARA, Yuta SAITO, Noriyuki OOKAWA, Riyousuke AKAZAWA, Takefumi TAKAHASHI, Masahiro WAKASHIMA, Yuta KUROSU, Akito MORI
  • Publication number: 20220102078
    Abstract: A multilayer ceramic capacitor includes a multilayer body including an inner layer portion including dielectric layers and internal electrode layers alternately laminated therein, two outer layer portions respectively provided on both sides of the inner layer portion in a lamination direction, and two side gap portions respectively provided on both side surfaces of the inner layer portion and the outer layer portions, in a width direction intersecting the lamination direction, and external electrodes respectively provided on both end surfaces of the multilayer body in a length direction intersecting the lamination direction and the width direction, and each connected to the internal electrode layers, wherein nickel and magnesium are segregated between the side gap portions and the outer layer portions.
    Type: Application
    Filed: September 28, 2021
    Publication date: March 31, 2022
    Inventors: Keita KITAHARA, Yuta SAITO, Noriyuki OOKAWA, Riyousuke AKAZAWA, Takefumi TAKAHASHI, Masahiro WAKASHIMA, Yuta KUROSU, Akito MORI
  • Publication number: 20220102077
    Abstract: In a multilayer ceramic capacitor, a positional deviation in a lamination direction between end portions in a width direction intersecting the lamination direction and a length direction, of two of internal electrode layers adjacent to each other in the lamination direction, is about 5 ?m or less. A connection ratio N1/N0 at the middle portion thereof, and a connection ratio N2/N0 at the end portion thereof are about 90% or more, respectively, and a difference between N1/N0 and N2/N0 is about 10% or less.
    Type: Application
    Filed: September 28, 2021
    Publication date: March 31, 2022
    Inventors: Keita KITAHARA, Yuta SAITO, Noriyuki OOKAWA, Riyousuke AKAZAWA, Takefumi TAKAHASHI, Masahiro WAKASHIMA, Yuta KUROSU, Akito MORI
  • Publication number: 20220102075
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrode layers alternately laminated therein, base electrode layers respectively provided on both end surfaces of the multilayer body in a length direction intersecting a lamination direction, and each connected to the internal electrode layers and each including glass and copper, and plated layers respectively provided on an outer side of the base electrode layers. A protective layer including sulfur is provided between the glass included in the base electrode layers and the plated layers.
    Type: Application
    Filed: September 28, 2021
    Publication date: March 31, 2022
    Inventors: Keita KITAHARA, Yuta SAITO, Noriyuki OOKAWA, Riyousuke AKAZAWA, Takefumi TAKAHASHI, Masahiro WAKASHIMA, Yuta KUROSU, Akito MORI