Patents by Inventor Tadayasu Meguro

Tadayasu Meguro 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: 20060240180
    Abstract: A substrate for electron source formation on which a plurality of electron-emitting devices are arranged, comprising a layer where SiO2 is made a main component on the substrate, wherein an etching rate of the SiO2 layer at room temperature in 0.4 wt % of hydrogen fluoride ammonium solution (NH4-HF2) is 150 nm/min or less reducing the time-dependent change of an electron emission characteristic of an electron-emitting device in low cost, sharply improving the increasing speed of a device current If and the uniformity of final arrival values of If sharply reducing the dispersion of the electron emission characteristic, and an electron source and an image-forming apparatus that each use-the substrate.
    Type: Application
    Filed: June 26, 2006
    Publication date: October 26, 2006
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shuji Yamada, Tadayasu Meguro, Satoshi Takezawa
  • Patent number: 7095168
    Abstract: An electron source forming substrate comprises an insulating material film provided on a substrate surface, where an electron-emitting device is arranged. The insulating material film contains a metallic oxide and has a vacancy, so that the vacancy suppresses diffusion of Na from a substrate thereunder, thereby electron-emitting characteristic is maintained stable without adverse effect due to Na even after long time operation.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: August 22, 2006
    Assignee: Canon KAbushiki Kaisha
    Inventors: Tadayasu Meguro, Kazuya Ishiwata, Shuji Yamada, Fumikazu Kobayashi
  • Patent number: 7067236
    Abstract: The present invention provides a method of manufacturing a member pattern having a patterned member on a substrate, the method including: a first exposure step of exposing a desired region of a negative type photosensitive material applied to the substrate to light from a first direction; a second exposure step of exposing the desired region of the negative type photosensitive material to light from a second direction opposite to the first direction; a development step of performing development after the exposure steps to form a precursor pattern of the member; and a step of baking the precursor pattern.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: June 27, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shuji Yamada, Takahiro Hachisu, Tadayasu Meguro
  • Patent number: 6815884
    Abstract: An electron source forming substrate wherein an insulating material film is disposed on the surface of the substrate at which surface an electron-emitting device is arranged. The insulating material film contains a plurality of metallic oxide particles having an average particle size within the range of 6 nm to 60 nm as expressed in a median value, and suppresses undesirable diffusion of Na from the substrate, thereby makes stable an electron-emitting characteristics, without an adverse effect due to the Na diffusion, even elapsing longer time.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: November 9, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shuji Yamada, Kazuya Ishiwata, Tadayasu Meguro
  • Patent number: 6803707
    Abstract: Disclosed is an electron source forming substrate provided with an insulating material layer provided on the surface of a substrate, at which surface an electron-emitting device is disposed, wherein the insulating material layer has a plurality of partially exposed metal oxide particles on its surface. Also disclosed are an electron source including a substrate and an electron-emitting device arranged on the substrate, wherein the substrate is an electron source forming substrate as described above, and an image display apparatus including an envelope, an electron-emitting device arranged in the envelope, and an image display member adapted to display images through application of electrons from the electron-emitting device, wherein a substrate on which the electron-emitting device is arranged is an electron source forming substrate as described above.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: October 12, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuya Ishiwata, Shuji Yamada, Tadayasu Meguro
  • Publication number: 20040018449
    Abstract: The present invention provides a method of manufacturing a member pattern having a patterned member on a substrate, the method including: a first exposure step of exposing a desired region of a negative type photosensitive material applied to the substrate to light from a first direction; a second exposure step of exposing the desired region of the negative type photosensitive material to light from a second direction opposite to the first direction; a development step of performing development after the exposure steps to form a precursor pattern of the member; and a step of baking the precursor pattern.
    Type: Application
    Filed: July 16, 2003
    Publication date: January 29, 2004
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shuji Yamada, Takahiro Hachisu, Tadayasu Meguro
  • Publication number: 20030057816
    Abstract: A substrate for electron source formation on which a plurality of electron-emitting devices are arranged, comprising a layer where SiO2 is made a main component on the substrate, wherein an etching rate of the SiO2 layer at room temperature in 0.4 wt % of hydrogen fluoride ammonium solution (NH4—HF2) is 150 nm/min or less reducing the time-dependent change of an electron emission characteristic of an electron-emitting device in low cost, sharply improving the increasing speed of a device current If and the uniformity of final arrival values of If sharply reducing the dispersion of the electron emission characteristic, and an electron source and an image-forming apparatus that each use the substrate.
    Type: Application
    Filed: September 23, 2002
    Publication date: March 27, 2003
    Inventors: Shuji Yamada, Tadayasu Meguro, Satoshi Takezawa
  • Publication number: 20020070677
    Abstract: An electron source forming substrate wherein an insulating material film is disposed on the surface of the substrate at which surface an electron-emitting device is arranged. The insulating material film contains a plurality of metallic oxide particles having an average particle size within the range of 6 nm to 60 nm as expressed in a median value, and suppresses undesirable diffusion of Na from the substrate, thereby makes stable an electron-emitting characteristics, without an adverse effect due to the Na diffusion, even elapsing longer time.
    Type: Application
    Filed: May 3, 2001
    Publication date: June 13, 2002
    Inventors: Shuji Yamada, Kazuya Ishiwata, Tadayasu Meguro
  • Publication number: 20020008454
    Abstract: Disclosed is an electron source forming substrate provided with an insulating material layer provided on the surface of a substrate, at which surface an electron-emitting device is disposed, wherein the insulating material layer has a plurality of partially exposed metal oxide particles on its surface. Also disclosed are an electron source including a substrate and an electron-emitting device arranged on the substrate, wherein the substrate is an electron source forming substrate as described above, and an image display apparatus including an envelope, an electron-emitting device arranged in the envelope, and an image display member adapted to display images through application of electrons from the electron-emitting device, wherein a substrate on which the electron-emitting device is arranged is an electron source forming substrate as described above.
    Type: Application
    Filed: May 2, 2001
    Publication date: January 24, 2002
    Inventors: Kazuya Ishiwata, Shuji Yamada, Tadayasu Meguro
  • Publication number: 20020003398
    Abstract: An electron source forming substrate comprises an insulating material film provided on a substrate surface, where an electron-emitting device is arranged. The insulating material film contains a metallic oxide and has a vacancy, so that the vacancy suppresses diffusion of Na from a substrate thereunder, thereby electron-emitting characteristic is maintained stable without adverse effect due to Na even after long time operation.
    Type: Application
    Filed: May 1, 2001
    Publication date: January 10, 2002
    Inventors: Tadayasu Meguro, Kazuya Ishiwata, Shuji Yamada, Fumikazu Kobayashi