Patents by Inventor Haruyuki Hiratsuka

Haruyuki Hiratsuka 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: 7902481
    Abstract: A method of manufacturing a sealed electronic component, which can seal a housing in a high-vacuum state while preventing enclosure of a gas within the housing, as well as achieving the improvement in manufacturing efficiency. According to the method, after forming an unwelded section by a primary welding process step, including a first beam irradiation process step and a second beam irradiation process step, annealing treatment is performed in an annealing process step by irradiating an electron beam to a predetermined portion on a locus of the electron beam formed in the first beam irradiation process step. The locus may be on a housing or a lid.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: March 8, 2011
    Assignees: Citizen Holdings Co., Ltd, Citizen Finetech Miyota Co., Ltd
    Inventors: Keisuke Kigawa, Haruyuki Hiratsuka, Tomohisa Wada
  • Patent number: 7842891
    Abstract: There is provided a sealing board (30) for sealing a container containing an electronic component, constituted of a base which is made of a material exhibiting a low wettability to a brazing filler metal (31) and on a surface of which a metal layer exhibiting a high wettability to the brazing filler metal (31) is formed, a brazing filler metal portion formed on the metal layer to form a closed region, and an exposed portion in which a surface of the base is exposed in at least a part of the closed region. By making at least a part of the sealing board as the exposed portion, it is possible to produce the sealing board with the brazing filler metal for a package stable in quality and inexpensively.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: November 30, 2010
    Assignee: Citizen Holdings Co. Ltd.
    Inventors: Takao Kasai, Haruyuki Hiratsuka
  • Publication number: 20090120684
    Abstract: There is provided a sealing board (30) for sealing a container containing an electronic component, constituted of a base which is made of a material exhibiting a low wettability to a brazing filler metal (31) and on a surface of which a metal layer exhibiting a high wettability to the brazing filler metal (31) is formed, a brazing filler metal portion formed on the metal layer to form a closed region, and an exposed portion in which a surface of the base is exposed in at least a part of the closed region. By making at least a part of the sealing board as the exposed portion, it is possible to produce the sealing board with the brazing filler metal for a package stable in quality and inexpensively.
    Type: Application
    Filed: January 20, 2006
    Publication date: May 14, 2009
    Inventors: Takao Kasai, Haruyuki Hiratsuka
  • Publication number: 20070199925
    Abstract: After forming an unwelded section by a primary welding process step (S203) including a first beam irradiation process step (S203a) and a second beam irradiation process step (S203b), annealing treatment is performed in an annealing process step (S204) by irradiating an electron beam to a predetermined portion on a locus of the electron beam formed in the first beam irradiation process step (S203a). Thereby, there is provided a manufacturing method of a sealed electronic component, which can seal a housing in a high-vacuum state while preventing enclosure of a gas within the housing, as well as achieving the improvement in manufacturing efficiency.
    Type: Application
    Filed: March 30, 2005
    Publication date: August 30, 2007
    Inventors: Keisuke Kigawa, Haruyuki Hiratsuka, Tomohisa Wada