Patents by Inventor Itaru Mizuno

Itaru Mizuno 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: 8164069
    Abstract: A light-emitting body of rapid speed of response and high light emission intensity, and an electron beam detector, scanning electron microscope and mass spectroscope using this are provided. In the light-emitting body 10 according to the present invention, when fluorescence is emitted by a nitride semiconductor layer 14 formed on one face 12a of a substrate 12 in response to incidence of electrons, at least some of this fluorescence is transmitted through this substrate 12, whereby that fluorescence is emitted from the other face 12b of the substrate. The response speed of this fluorescence is not more than ?sec order. Also, the intensity of emission of this fluorescence is almost identical to that of a conventional P47 phosphor. Specifically, with this light-emitting body 10, a response speed and light emission intensity are obtained that are fully satisfactory for application to a scanning electron microscope or mass spectroscope.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: April 24, 2012
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Shoichi Uchiyama, Yasufumi Takagi, Minoru Niigaki, Minoru Kondo, Itaru Mizuno
  • Publication number: 20110101219
    Abstract: A light-emitting body of rapid speed of response and high light emission intensity, and an electron beam detector, scanning electron microscope and mass spectroscope using this are provided. In the light-emitting body 10 according to the present invention, when fluorescence is emitted by a nitride semiconductor layer 14 formed on one face 12a of a substrate 12 in response to incidence of electrons, at least some of this fluorescence is transmitted through this substrate 12, whereby that fluorescence is emitted from the other face 12b of the substrate. The response speed of this fluorescence is not more than ?sec order. Also, the intensity of emission of this fluorescence is almost identical to that of a conventional P47 phosphor. Specifically, with this light-emitting body 10, a response speed and light emission intensity are obtained that are fully satisfactory for application to a scanning electron microscope or mass spectroscope.
    Type: Application
    Filed: January 10, 2011
    Publication date: May 5, 2011
    Inventors: Shoichi UCHIYAMA, Yasufumi TAKAGI, Minoru NIIGAKI, Minoru KONDO, Itaru MIZUNO
  • Patent number: 7910895
    Abstract: A light-emitting body of rapid speed of response and high light emission intensity, and an electron beam detector, scanning electron microscope and mass spectroscope using this are provided. In the light-emitting body 10 according to the present invention, when fluorescence is emitted by a nitride semiconductor layer 14 formed on one face 12a of a substrate 12 in response to incidence of electrons, at least some of this fluorescence is transmitted through this substrate 12, whereby that fluorescence is emitted from the other face 12b of the substrate. The response speed of this fluorescence is not more than ?sec order. Also, the intensity of emission of this fluorescence is almost identical to that of a conventional P47 phosphor. Specifically, with this light-emitting body 10, a response speed and light emission intensity are obtained that are fully satisfactory for application to a scanning electron microscope or mass spectroscope.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: March 22, 2011
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Shoichi Uchiyama, Yasufumi Takagi, Minoru Niigaki, Minoru Kondo, Itaru Mizuno
  • Publication number: 20080116368
    Abstract: A light-emitting body of rapid speed of response and high light emission intensity, and an electron beam detector, scanning electron microscope and mass spectroscope using this are provided. In the light-emitting body 10 according to the present invention, when fluorescence is emitted by a nitride semiconductor layer 14 formed on one face 12a of a substrate 12 in response to incidence of electrons, at least some of this fluorescence is transmitted through this substrate 12, whereby that fluorescence is emitted from the other face 12b of the substrate. The response speed of this fluorescence is not more than ?sec order. Also, the intensity of emission of this fluorescence is almost identical to that of a conventional P47 phosphor. Specifically, with this light-emitting body 10, a response speed and light emission intensity are obtained that are fully satisfactory for application to a scanning electron microscope or mass spectroscope.
    Type: Application
    Filed: April 7, 2005
    Publication date: May 22, 2008
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Shoichi Uchiyama, Yasufumi Takagi, Minoru Niigaki, Minoru Kondo, Itaru Mizuno
  • Patent number: 7030388
    Abstract: The present invention relates to an illuminant, etc., having a high response speed and a high luminous intensity. The illuminant comprises a substrate and a nitride semiconductor layer provided on one surface of the substrate. The nitride semiconductor layer emits fluorescence in response to incidence of electrons. At least part of the emitted fluorescence passes through the substrate, and then exits from the other surface of the substrate. Generation of the fluorescence is caused by incidence of electrons onto a quantum well structure of the nitride semiconductor layer and recombination of pairs of electrons and holes generated due to electron incidence, and the response speed of fluorescence generation is on the order of nanoseconds or less. Also, the luminous intensity of the fluorescence becomes equivalent to that of a conventional P47 fluorescent substance.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: April 18, 2006
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Yasufumi Takagi, Minoru Niigaki, Shoichi Uchiyama, Minoru Kondo, Itaru Mizuno
  • Publication number: 20040129891
    Abstract: The present invention relates to an illuminant, etc., having a high response speed and a high luminous intensity. The illuminant comprises a substrate and a nitride semiconductor layer provided on one surface of the substrate. The nitride semiconductor layer emits fluorescence in response to incidence of electrons. At least part of the emitted fluorescence passes through the substrate, and then exits from the other surface of the substrate. Generation of the fluorescence is caused by incidence of electrons onto a quantum well structure of the nitride semiconductor layer and recombination of pairs of electrons and holes generated due to electron incidence, and the response speed of fluorescence generation is on the order of nanoseconds or less. Also, the luminous intensity of the fluorescence becomes equivalent to that of a conventional P47 fluorescent substance.
    Type: Application
    Filed: October 7, 2003
    Publication date: July 8, 2004
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Yasufumi Takagi, Minoru Niigaki, Shoichi Uchiyama, Minoru Kondo, Itaru Mizuno