Patents by Inventor Keishi Saitoh

Keishi Saitoh 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: 4501807
    Abstract: A photoconductive member comprising a support for photoconductive member and an amorphous layer exhibiting photoconductivity comprising an amorphous material containing silicon atoms as a matrix is characterized in that said amorphous layer has a first layer region containing, as constituent atoms, oxygen atoms in a distribution which is nonuniform and continuous in the direction of the layer thickness and a second layer region containing, as constituent atoms, the atoms (A) belonging to group III or group V of the periodic table in a distribution which is continuous in the direction of the layer thickness, said second layer existing internally beneath the surface of said amorphous layer.
    Type: Grant
    Filed: March 8, 1983
    Date of Patent: February 26, 1985
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigeru Shirai, Kyosuke Ogawa, Junichiro Kanbe, Keishi Saitoh, Yoichi Osato, Teruo Misumi
  • Patent number: 4490454
    Abstract: A photoconductive member comprises a support for photoconductive member and an amorphous layer comprising an amorphous material containing silicon atoms as a matrix and exhibiting photoconductivity, said amorphous layer having a first layer region containing, as constituent atoms, oxygen atoms and a second layer region containing, as constituent atoms, the atoms belonging to the group V of the periodic table in a distribution which is continuous in the direction of the layer thickness and more enriched toward the side of said support.
    Type: Grant
    Filed: March 14, 1983
    Date of Patent: December 25, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Teruo Misumi, Kyosuke Ogawa, Junichiro Kanbe, Keishi Saitoh, Yoichi Osato, Shigeru Shirai
  • Patent number: 4486521
    Abstract: A photoconductive member comprises a support for a photoconductive member and an amorphous layer containing an amorphous material comprising silicon atom as a matrix and having photoconductivity, said amorphous layer comprising a first layer region containing oxygen atom as a constituent atom, the oxygen atom being distributed continuously in the direction of the layer thickness and enriched at the support side, and a second layer region containing an atom of the group III of the periodic table as a constituent atom, said first layer region being internally present at the support side in the amorphous layer, and the layer thickness T.sub.B of said second layer region and a layer thickness T resulted from subtracting T.sub.B from the layer thickness of the amorphous layer satisfying the relation, T.sub.B /T.ltoreq.1.
    Type: Grant
    Filed: March 14, 1983
    Date of Patent: December 4, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Teruo Misumi, Kyosuke Ogawa, Junichiro Kanbe, Keishi Saitoh, Yoichi Osato, Shigeru Shirai
  • Patent number: 4483911
    Abstract: A photoconductive member comprises a support and an amorphous layer comprising a first layer region and a second layer region, the first layer region having photoconductivity comprising an amorphous material which comprises silicon atoms as a matrix and at least one member selected from hydrogen atoms and halogen atoms as a constituent, the first layer region having a layer region (I) containing an impurity controlling the electroconductivity type at the support side, and the second layer region comprising an amorphous material comprising at least both silicon and carbon as constituents.
    Type: Grant
    Filed: December 17, 1982
    Date of Patent: November 20, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kyosuke Ogawa, Shigeru Shirai, Junichiro Kanbe, Keishi Saitoh, Yoichi Osato
  • Patent number: 4465750
    Abstract: A photoconductive member comprises a support and an amorphous layer compsed of a first layer region composed of a photoconductive amorphous silicon containing p- or n-type impurity distributed nonuniformly and continuously in the layer thickness direction, and a second layer region composed of Si.sub.a C.sub.1-a (0.4<a<1), [Si.sub.b C.sub.1-b ].sub.c H.sub.1-c (0.5<b<1, 0.6.ltoreq.c<1), [Si.sub.d C.sub.1-d ].sub.e X.sub.1-e (0.47<d<1, 0.8.ltoreq.e<1, X: halogen) or [Si.sub.f C.sub.1-f ].sub.g (H+X).sub.1-g (0.47<f<1, 0.8.ltoreq.g<1, X: halogen].
    Type: Grant
    Filed: December 13, 1982
    Date of Patent: August 14, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kyosuke Ogawa, Shigeru Shirai, Junichiro Kanbe, Keishi Saitoh, Yoichi Osato
  • Patent number: 4460669
    Abstract: A photoconductive member comprises a support for a photoconductive member and an amorphous layer having photoconductivity constituted of an amorphous material comprising silicon atoms as a matrix, said amorphous layer having a first layer region containing as the constituent atom at least one kind of atoms selected from the group consisting of oxygen atoms, carbon atoms and nitrogen atoms in a distribution state which is ununiform and continuous in the direction of layer thickness and a second layer region containing atoms belonging to the group III of the periodic table as constituent atoms in a distribution state which is ununiform and continuous in the direction of layer thickness, said first layer region existing internally below the surface of said amorphous layer.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: July 17, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kyosuke Ogawa, Shigeru Shirai, Junichiro Kanbe, Keishi Saitoh, Yoichi Osato
  • Patent number: 4460670
    Abstract: A photoconductive member comprises a support for a photoconductive member and an amorphous layer having photoconductivity constituted of an amorphous material comprising silicon atoms as a matrix, said amorphous layer having a first layer region containing at least one kind of atoms selected from the group consisting of oxygen atoms, carbon atoms and nitrogen atoms as constituent atoms in a distribution which is ununiform and continuous in the direction of layer thickness and a second layer region containing atoms of an element belonging to the group III of the periodic table as constituent atoms in a distribution which is ununiform and continuous in the direction of layer thickness.
    Type: Grant
    Filed: November 19, 1982
    Date of Patent: July 17, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kyosuke Ogawa, Shigeru Shirai, Junichiro Kanbe, Keishi Saitoh, Yoichi Osato
  • Patent number: 4452874
    Abstract: A photoconductive member comprises a support for photoconductive member, an interface layer comprising an amorphous material represented by any of the formulas:Si.sub.a N.sub.1-a (0.57<a<1) (1)(Si.sub.b N.sub.1-b).sub.c H.sub.1-c (0.6<b<1, 0.65.ltoreq.c<1) (2)(Si.sub.d N.sub.1-d).sub.e (X, H).sub.1-e (0.6<d<1, 0.8.ltoreq.e<1) (3)(wherein X represents a halogen atom),a rectifying layer comprising an amorphous material containing atoms (A) belonging to the group III or the group V of the periodic table as constituent atoms in a matrix of silicon atoms, and an amorphous layer exhibiting photoconductivity comprising an amorphous material containing at least one of hydrogen atoms and halogen atoms as constituent atoms in a matrix of silicon atoms.
    Type: Grant
    Filed: February 1, 1983
    Date of Patent: June 5, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kyosuke Ogawa, Shigeru Shirai, Junichiro Kanbe, Keishi Saitoh, Yoichi Osato, Teruo Misumi
  • Patent number: 4452875
    Abstract: A photoconductive member comprises a support for a photoconductive member, an interface layer comprising an amorphous material containing silicon atoms and nitrogen atoms as constituent atoms, a rectifying layer comprising an amorphous material containing atoms (A) belonging to the group III or the group V of the periodic table as constituent atoms in a matrix of silicon atoms, a first amorphous layer exhibiting photoconductivity and comprising an amorphous material containing at least one member selected from the group consisting of hydrogen atoms and halogen atoms as constituent atoms in a matrix of silicon atoms, and a second amorphous layer containing an amorphous material represented by any of the formulas:Si.sub.a C.sub.1-a (0.4<a<1) . . . (1)(Si.sub.b C.sub.1-b).sub.c H.sub.1-c (0.5<b<1, 0.6 .ltoreq.c<1) . . . (2)(Si.sub.d C.sub.1-d).sub.e X.sub.1-e (0.47<d<1, 0.8.ltoreq.e<1) . . . (3)(Si.sub.f C.sub.1-f).sub.g (H+X).sub.1-g (0.47<f<1, 0.8.ltoreq.g<1) . . .
    Type: Grant
    Filed: February 8, 1983
    Date of Patent: June 5, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kyosuke Ogawa, Shigeru Shirai, Junichiro Kanbe, Keishi Saitoh, Yoichi Osato, Teruo Misumi
  • Patent number: 4423133
    Abstract: A photoconductive layer comprises a support and an amorphous layer. The amorphous layer is photoconductive, comprises silicon as matrix and hydrogen and/or halogen, and has a layer region containing group III atoms which is distributed such that the distribution is continuous in the direction of layer thickness and said atoms are more enriched on the aforesaid support side than on the opposite side to the aforesaid support side in said layer.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: December 27, 1983
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junichiro Kanbe, Shigeru Shirai, Kyosuke Ogawa, Keishi Saitoh, Yoichi Osato