Patents by Inventor Shinichi Kokawa

Shinichi Kokawa 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: 11967461
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrodes alternately laminated therein, and two end surfaces opposing each other in a length direction, and two side surfaces opposing each other in a width direction, and two external electrodes respectively on the two end surfaces of the multilayer body. At least one of two opposed main surfaces of the multilayer ceramic capacitor includes raised portions provided respectively on one side and another side with a middle portion of the main surface interposed therebetween. The raised portions are each raised to become thicker in the lamination direction from the middle portion toward an outer periphery of the main surface.
    Type: Grant
    Filed: September 20, 2021
    Date of Patent: April 23, 2024
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Yasuyuki Shimada, Akira Tanaka, Shinichi Kokawa
  • 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
  • Publication number: 20220148807
    Abstract: A multilayer ceramic capacitor includes end-surface external electrodes and side-surface external electrodes. The end-surface external electrodes are respectively provided at end surfaces of a multilayer body and are respectively connected to end-surface connecting internal electrodes. The side-surface external electrodes are respectively provided at the side surfaces of the multilayer body and respectively connected to side-surface connecting internal electrodes. The end-surface connecting internal electrodes each include end surface opposing portion opposing the side-surface connecting internal electrode 15B adjacent in a lamination direction, and an end surface lead-out portion extending from the end surface opposing portion to one of the end-surface external electrodes.
    Type: Application
    Filed: October 21, 2021
    Publication date: May 12, 2022
    Inventors: Akira ISHIZUKA, Shinichi KOKAWA, Yasuyuki SHIMADA
  • Publication number: 20220093331
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrodes alternately laminated therein, and two end surfaces opposing each other in a length direction, and two side surfaces opposing each other in a width direction, and two external electrodes respectively on the two end surfaces of the multilayer body. At least one of two opposed main surfaces of the multilayer ceramic capacitor includes raised portions provided respectively on one side and another side with a middle portion of the main surface interposed therebetween. The raised portions are each raised to become thicker in the lamination direction from the middle portion toward an outer periphery of the main surface.
    Type: Application
    Filed: September 20, 2021
    Publication date: March 24, 2022
    Inventors: Yasuyuki SHIMADA, Akira TANAKA, Shinichi KOKAWA
  • 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
  • Patent number: 10414190
    Abstract: A printing plate which can form a graphic pattern having excellent linearity of a side edge along the printing direction and a good planarization property in the case of forming a graphic pattern in which a width direction dimension, a dimension in a direction orthogonal to the printing direction, is small; a printing device including the printing plate; and a method for manufacturing a laminated ceramic electronic component.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: September 17, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Yoshihiro Kanayama, Shinichi Kokawa
  • Publication number: 20170173989
    Abstract: A printing plate which can form a graphic pattern having excellent linearity of a side edge along the printing direction and a good planarization property in the case of forming a graphic pattern in which a width direction dimension, a dimension in a direction orthogonal to the printing direction, is small; a printing device including the printing plate; and a method for manufacturing a laminated ceramic electronic component.
    Type: Application
    Filed: December 12, 2016
    Publication date: June 22, 2017
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Yoshihiro KANAYAMA, Shinichi KOKAWA
  • Patent number: 7547370
    Abstract: A method for manufacturing a multilayer ceramic electronic element includes the steps of forming ceramic green sheets having superior surface smoothness and small variations in thickness at a high speed, in which defects such as pinholes are prevented from occurring, and providing internal electrodes and step-smoothing ceramic paste on the ceramic green sheets with high accuracy. The method includes the steps of applying ceramic slurry to a base film by a die coater followed by drying performed in a drying furnace for forming the ceramic green sheets, and performing gravure printing of conductive paste and ceramic paste onto the ceramic green sheets by using a first and a second gravure printing apparatus, respectively. Accordingly, the internal electrodes are formed, and the step-smoothing ceramic paste is provided in regions other than those in which the internal electrodes are formed.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: June 16, 2009
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Shingo Okuyama, Hiroyoshi Takashima, Akira Hashimoto, Shinichi Kokawa
  • Patent number: 7503993
    Abstract: A method for manufacturing a multilayer ceramic electronic element includes the steps of forming ceramic green sheets having superior surface smoothness and small variations in thickness at a high speed, in which defects such as pinholes are prevented from occurring, and providing internal electrodes and step-smoothing ceramic paste on the ceramic green sheets with high accuracy. The method includes the steps of applying ceramic slurry to a base film by a die coater followed by drying performed in a drying furnace for forming the ceramic green sheets, and performing gravure printing of conductive paste and ceramic paste onto the ceramic green sheets by using a first and a second gravure printing apparatus, respectively. Accordingly, the internal electrodes are formed, and the step-smoothing ceramic paste is provided in regions other than those in which the internal electrodes are formed.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: March 17, 2009
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Shingo Okuyama, Hiroyoshi Takashima, Akira Hashimoto, Shinichi Kokawa
  • Publication number: 20070095456
    Abstract: A method for manufacturing a multilayer ceramic electronic element includes the steps of forming ceramic green sheets having superior surface smoothness and small variations in thickness at a high speed, in which defects such as pinholes are prevented from occurring, and providing internal electrodes and step-smoothing ceramic paste on the ceramic green sheets with high accuracy. The method includes the steps of applying ceramic slurry to a base film by a die coater followed by drying performed in a drying furnace for forming the ceramic green sheets, and performing gravure printing of conductive paste and ceramic paste onto the ceramic green sheets by using a first and a second gravure printing apparatus, respectively. Accordingly, the internal electrodes are formed, and the step-smoothing ceramic paste is provided in regions other than those in which the internal electrodes are formed.
    Type: Application
    Filed: December 15, 2006
    Publication date: May 3, 2007
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Shingo OKUYAMA, Hiroyoshi TAKASHIMA, Akira HASHIMOTO, Shinichi KOKAWA
  • Publication number: 20050016661
    Abstract: A method for manufacturing a multilayer ceramic electronic element includes the steps of forming ceramic green sheets having superior surface smoothness and small variations in thickness at a high speed, in which defects such as pinholes are prevented from occurring, and providing internal electrodes and step-smoothing ceramic paste on the ceramic green sheets with high accuracy. The method includes the steps of applying ceramic slurry to a base film by a die coater followed by drying performed in a drying furnace for forming the ceramic green sheets, and performing gravure printing of conductive paste and ceramic paste onto the ceramic green sheets by using a first and a second gravure printing apparatus, respectively. Accordingly, the internal electrodes are formed, and the step-smoothing ceramic paste is provided in regions other than those in which the internal electrodes are formed.
    Type: Application
    Filed: August 25, 2004
    Publication date: January 27, 2005
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Shingo Okuyama, Hiroyoshi Takashima, Akira Hashimoto, Shinichi Kokawa
  • Publication number: 20030111158
    Abstract: A method for manufacturing a multilayer ceramic electronic element includes the steps of forming ceramic green sheets having superior surface smoothness and small variations in thickness at a high speed, in which defects such as pinholes are prevented from occurring, and providing internal electrodes and step-smoothing ceramic paste on the ceramic green sheets with high accuracy. The method includes the steps of applying ceramic slurry to a base film by a die coater followed by drying performed in a drying furnace for forming the ceramic green sheets, and performing gravure printing of conductive paste and ceramic paste onto the ceramic green sheets by using a first and a second gravure printing apparatus, respectively. Accordingly, the internal electrodes are formed, and the step-smoothing ceramic paste is provided in regions other than those in which the internal electrodes are formed.
    Type: Application
    Filed: December 13, 2002
    Publication date: June 19, 2003
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Shingo Okuyama, Hiroyoshi Takashima, Akira Hashimoto, Shinichi Kokawa