Patents by Inventor Shimpei Hirokawa

Shimpei Hirokawa 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).

  • Electron source and production method therefor
    Patent number: 11152185
    Abstract: An electron source capable of suppressing consumption of an electron emission material is provide. The present invention provides an electron source including: an electron emission material; and, an electron emission-suppressing material covering a side surface of the electron emission material, wherein a work function of the electron emission-suppressing material is higher than that of the electron emission material, and a thermal emissivity of the electron emission-suppressing material is lower than that of the electron emission material.
    Type: Grant
    Filed: February 17, 2021
    Date of Patent: October 19, 2021
    Assignee: Denka Company Limited
    Inventors: Toshiyuki Morishita, Hiromitsu Chatani, Shimpei Hirokawa, Toshiyuki Ibayashi, Isao Sugimoto
  • ELECTRON SOURCE AND PRODUCTION METHOD THEREFOR
    Publication number: 20210193427
    Abstract: An electron source capable of suppressing consumption of an electron emission material is provide. The present invention provides an electron source including: an electron emission material; and, an electron emission-suppressing material covering a side surface of the electron emission material, wherein a work function of the electron emission-suppressing material is higher than that of the electron emission material, and a thermal emissivity of the electron emission-suppressing material is lower than that of the electron emission material.
    Type: Application
    Filed: February 17, 2021
    Publication date: June 24, 2021
    Inventors: Toshiyuki Morishita, Hiromitsu Chatani, Shimpei Hirokawa, Toshiyuki Ibayashi, Isao Sugimoto
  • Electron source and production method therefor
    Patent number: 10957511
    Abstract: An electron source capable of suppressing consumption of an electron emission material is provide. The present invention provides an electron source including: an electron emission material; and, an electron emission-suppressing material covering a side surface of the electron emission material, wherein a work function of the electron emission-suppressing material is higher than that of the electron emission material, and a thermal emissivity of the electron emission-suppressing material is lower than that of the electron emission material.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: March 23, 2021
    Assignee: Denka Company Limited
    Inventors: Toshiyuki Morishita, Hiromitsu Chatani, Shimpei Hirokawa, Toshiyuki Ibayashi, Isao Sugimoto
  • ELECTRON SOURCE AND PRODUCTION METHOD THEREFOR
    Publication number: 20200126750
    Abstract: An electron source capable of suppressing consumption of an electron emission material is provide. The present invention provides an electron source including: an electron emission material; and, an electron emission-suppressing material covering a side surface of the electron emission material, wherein a work function of the electron emission-suppressing material is higher than that of the electron emission material, and a thermal emissivity of the electron emission-suppressing material is lower than that of the electron emission material.
    Type: Application
    Filed: December 9, 2019
    Publication date: April 23, 2020
    Inventors: Toshiyuki Morishita, Hiromitsu Chatani, Shimpei Hirokawa, Toshiyuki Ibayashi, Isao Sugimoto
  • Electron source and production method therefor
    Patent number: 10553390
    Abstract: An electron source capable of suppressing consumption of an electron emission material is provide. The present invention provides an electron source including: an electron emission material; and, an electron emission-suppressing material covering a side surface of the electron emission material, wherein a work function of the electron emission-suppressing material is higher than that of the electron emission material, and a thermal emissivity of the electron emission-suppressing material is lower than that of the electron emission material.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: February 4, 2020
    Assignee: Denka Company Limited
    Inventors: Toshiyuki Morishita, Hiromitsu Chatani, Shimpei Hirokawa, Toshiyuki Ibayashi, Isao Sugimoto
  • ELECTRON SOURCE AND PRODUCTION METHOD THEREFOR
    Publication number: 20190221399
    Abstract: An electron source capable of suppressing consumption of an electron emission material is provide. The present invention provides an electron source including: an electron emission material; and, an electron emission-suppressing material covering a side surface of the electron emission material, wherein a work function of the electron emission-suppressing material is higher than that of the electron emission material, and a thermal emissivity of the electron emission-suppressing material is lower than that of the electron emission material.
    Type: Application
    Filed: June 29, 2017
    Publication date: July 18, 2019
    Applicant: Denka Company Limited
    Inventors: Toshiyuki MORISHITA, Hiromitsu CHATANI, Shimpei HIROKAWA, Toshiyuki IBAYASHI, Isao SUGIMOTO
  • Enclosure and method for handling electron gun or ion gun
    Patent number: 9496673
    Abstract: The present invention is a charged-particle gun (EG) in which a negative electrode (1) and a positive electrode (9) are integrated and assembled in advance, and which can be stored and transported in a state in which the negative electrode and the positive electrode are integrated, wherein the negative electrode and the positive electrode are connected by a conductor (11) during storage and transportation of the charged-particle gun. It is thereby possible to prevent an electrode tip of the charged-particle gun from being damaged by electrical discharge caused by static electricity during storage and transportation.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: November 15, 2016
    Assignee: DENKA COMPANY LIMITED
    Inventors: Toshiyuki Morishita, Yoshinori Terui, Shimpei Hirokawa
  • ENCLOSURE AND METHOD FOR HANDLING ELECTRIC GUN OR ION GUN
    Publication number: 20140000104
    Abstract: The present invention is a charged-particle gun (EG) in which a negative electrode (1) and a positive electrode (9) are integrated and assembled in advance, and which can be stored and transported in a state in which the negative electrode and the positive electrode are integrated, wherein the negative electrode and the positive electrode are connected by a conductor (11) during storage and transportation of the charged-particle gun. It is thereby possible to prevent an electrode tip of the charged-particle gun from being damaged by electrical discharge caused by static electricity during storage and transportation.
    Type: Application
    Filed: February 21, 2012
    Publication date: January 2, 2014
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Toshiyuki Morishita, Yoshinori Terui, Shimpei Hirokawa