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).
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Patent number: 4812328Abstract: A method for forming a deposited film by introducing a gaseous starting material for formation of a deposited film and a gaseous halogenic oxidizing agent having the property of oxidation action on said starting material separately from each other into a reaction space to form a deposited film according to a chemical reaction, which comprises activating previously a gaseous substance (B) for formation of a band gap controller in an activation space to form an activated species and introducing said activated species into the reaction space to form a deposited film controlled in band gap on a substrate existing in the film forming space.Type: GrantFiled: December 23, 1986Date of Patent: March 14, 1989Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Masaaki Hirooka, Junichi Hanna, Isamu Shimizu
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Patent number: 4804558Abstract: A process for producing an electroluminescent device comprises providing in a film forming space for forming an electroluminescent film a substrate having an electrode formed on the surface thereof, said electrtode optionally having a first insulating layer formed thereon, introducing into said film forming space the compounds (A), (B) and (C) represented by the general formulae (A), (B) and (C) shown below and a gaseous halogenic oxidizing agent capable of chemically reacting with at least one of said compounds (A), (B) and (C), respectively, to thereby form an electroluminescent film on said electrode of said substrate, and if desired forming a second insulating layer and electrode in succession thereon:MmRn (A)AaBb (B)JjQq (C)wherein m is a positive integer equal to the valence of R or said valence multiplied by an integer, n is a positive integer equal to the valence of M or said valence multiplied by an integer, M is zinc (Zn) element, R is hydrogen (H), halogen (X) or hydrocarbon group; a is a positiveType: GrantFiled: December 17, 1986Date of Patent: February 14, 1989Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Masaaki Hirooka, Junichi Hanna, Isamu Shimizu
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Patent number: 4795688Abstract: A photoconductive member comprises a support for a photoconductive member and an amorphous layer having photoconductivity and containing an amorphous material comprising silicon atom as a matrix, said amorphous layer having a first layer region containing oxygen atoms and a second layer region containing Group III atoms of the Periodic Table Such that said Group III atoms are continuously distributed in the direction of the layer thickness and enriched at the support side and wherein oxygen is absent from said amorphous layer exclusive of the first layer region, said first layer region being present internally in the support side portion of the amorphous layer, and there being the following relationship:To/T.ltoreq.1where To is the layer thickness of the first layer region and T results from subtracting To from the layer thickness of the amorphous layer.Type: GrantFiled: April 17, 1987Date of Patent: January 3, 1989Assignee: Canon Kabushiki KaishaInventors: Teruo Misumi, Kyosuke Ogawa, Junichiro Kanbe, Keishi Saitoh, Yoichi Osato, Shigeru Shirai
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Patent number: 4792509Abstract: There is provided an improved light receiving member for use in electrophotography comprising a substrate for electrophotography and a light receiving layer constituted by a charge injection inhibition layer formed of a polycrystal material containing silicon atoms as the main constituent atoms and an element for controlling the conductivity which functions to prevent a charge from being injected from the side of the substrate, a photoconductive layer formed of an amorphous material containing silicon atoms as the main constituent atoms and a surface layer formed of an amorphous material containing silicon atoms, carbon atoms and hydrogen atoms, the amount of the hydrogen atoms contained in the surface layer being in the range from 41 to 70 atomic %. The light receiving layer may have a contact layer and/or an absorption layer of light having a long wavelength.Type: GrantFiled: February 2, 1987Date of Patent: December 20, 1988Assignee: Canon Kabushiki KaishaInventors: Shigeru Shirai, Keishi Saitoh, Takayoshi Arai, Minoru Kato, Yasushi Fujioka
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Patent number: 4786574Abstract: A light-receiving member for electrophotography comprises a substrate and a light-receiving layer provided on the substrate comprising a photoconductive layer exhibiting photoconductivity comprising an amorphous material containing at least one of hydrogen atoms and halogen atoms as the constituent in a matrix of silicon atoms and a surface layer comprising an amorphous material containing silicon atoms, carbon atoms and hydrogen atoms and the constituents, said surface layer being changed in the distribution concentration in the layer thickness direction of the constituent elements such that matching optical gap is obtained at the interface with said photoconductive layer, and the maximum distribution concentration of the hydrogen atoms within said surface layer being 41 to 70 atomic percent.Type: GrantFiled: February 5, 1987Date of Patent: November 22, 1988Assignee: Canon Kabushiki KaishaInventors: Shigeru Shirai, Keishi Saitoh, Takayoshi Arai, Minoru Kato, Yasushi Fujioka
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Patent number: 4785763Abstract: An improved apparatus for the formation of a functional deposited film using a microwave plasma chemical vapor deposition process comprising a substantially enclosed deposition chamber having a deposition space, a supporting means for a substrate on which a functional deposited film is to be formed being placed in the deposition space, a means for supplying a raw material gas, a means for evacuating the inside of the deposition chamber, a microwave introducing means being provided with the wall of the deposition chamber and a waveguide being extended from a microwave power source, characterized in that said microwave introducing means is comprised of laminated two or more microwave transmissive plates made of a dielectric material and the surface of the outermost transmissive plate to become faced to the deposition space is of a roughened surface having a roughness of 1.5 .mu.m to about 1 cm for the height between the projection and the depression by the arithmetic mean for at least selected ten points.Type: GrantFiled: December 3, 1987Date of Patent: November 22, 1988Assignee: Canon Kabushiki KaishaInventor: Keishi Saitoh
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Patent number: 4780384Abstract: There is provided a light receiving member comprising a first layer and a second layer being laminated on a substrate, said first layer comprising (a) a layer of less than 100 .ANG. in thickness and (b) another layer of less than 100 .ANG. in thickness being laminated one upon the other, said layer (a) being formed of an amorphous material containing silicon atoms as the main constituent atoms and an element for controlling the conductivity and said layer (b) being formed of an amorphous material containing silicon atoms as the main constituent atoms and at least one kind element selected from the group consisting of nitrogen atoms, carbon atoms and oxygen atoms, and said second layer being formed of an amorphous material containing silicon atoms as the main constituent atoms.Type: GrantFiled: December 24, 1986Date of Patent: October 25, 1988Assignee: Canon Kabushiki KaishaInventor: Keishi Saitoh
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Patent number: 4780387Abstract: There is provided an improved light receiving member for use in electrophotography comprising a substrate for electrophotography and a light receiving layer constituted by a contact layer formed of a polycrystal material containing silicon atoms as the main constituent atoms and at least one kind selected from nitrogen atoms, oxygen atoms and carbon atoms, a photoconductive layer formed of an amorphous material containing silicon atoms as the main constituent atoms and a surface layer formed of an amorphous material containing silicon atoms, carbon atoms and hydrogen atoms, the amount of the hydrogen atoms contained in the surface layer being in the range from 1.times.10.sup.-3 to 40 atomic %. The light receiving layer may have a charge injection inhibition layer or/and an absorption layer of light having a long wavelength.Type: GrantFiled: February 20, 1987Date of Patent: October 25, 1988Assignee: Canon Kabushiki KaishaInventors: Shigeru Shirai, Keishi Saitoh, Takayoshi Arai, Minoru Kato, Yasushi Fujioka
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Patent number: 4720443Abstract: A light-receiving member comprises a substrate for light-receiving member and a light-receiving layer of a multi-layer structure having a first layer comprising an amorphous material containing silicon atoms and germanium atoms, a second layer comprising an amorphous material containing silicon atoms and exhibiting a photoconductivity, and a surface layer comprising an amorphous material containing silicon atoms and carbon atoms provided on the substrate successively from the substrate side, said light-receiving layer having at least one pair of nonparallel interfaces within a short range and said nonparallel interfaces being arranged in a large number in at least one direction within the plane perpendicular to the layer thickness direction.Type: GrantFiled: March 29, 1985Date of Patent: January 19, 1988Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Masahiro Kanai, Tetsuo Sueda, Teruo Misumi, Yoshio Tsuezuki, Kyosuke Ogawa
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Patent number: 4705733Abstract: A substrate for light-receiving members has a large number of protruding portions on a surface thereof, each of said protruding portions having at a predetermined cut position a sectional shape comprising a main projection and a subprojection, the main projection and the subprojection overlapping each other.Type: GrantFiled: April 22, 1985Date of Patent: November 10, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Masahiro Kanai, Tetsuo Sueda, Teruo Misumi, Yoshio Tsuezuki, Kyosuke Ogawa
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Patent number: 4705732Abstract: A light-receiving member comprises a substrate having a large number of protruding portions on a surface thereof, each of said protruding portions having at a predetermined cut position a sectional shape comprising a main projection and a subprojection, the main projection and the subprojection overlapping each other, and a light-receiving layer of a multi-layer structure having a first layer comprising an amorphous material containing silicon atoms and germanium atoms and a second layer comprising an amorphous material containing silicon atoms and exhibiting photoconductivity provided on said substrate successively from the substrate side.Type: GrantFiled: April 24, 1985Date of Patent: November 10, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Masahiro Kanai, Tetsuo Sueda, Teruo Misumi, Yoshio Tsuezuki, Kyosuke Ogawa
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Patent number: 4705731Abstract: A light-receiving member comprises a substrate having a large number of protruding portions on a surface thereof, each of said protruding portions having at a predetermined cut position a sectional shape comprising a main projection and a subprojection, the main projection and the subprojection overlapping each other, and a light-receiving layer with a multi-layer structure having a first layer comprising an amorphous material containing silicon atoms and germanium atoms, a second layer comprising an amorphous material containing silicon atoms and exhibiting photoconductivity, and a surface layer having the reflection preventive function provided successively from the substrate side, said light-receiving layer containing at least one selected from oxygen atoms, carbon atoms and nitrogen atoms.Type: GrantFiled: June 3, 1985Date of Patent: November 10, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Tetsuo Sueda, Kyosuke Ogawa, Teruo Misumi, Yoshio Tsuezuki, Masahiro Kanai
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Patent number: 4705734Abstract: A light-receiving member comprises a substrate having a large number of protruding portions on a surface thereof, each of said protruding portions having at a predetermined cut position a sectional shape comprising a main projection and a subprojection, the main projection and the subprojection overlapping each other, and a light-receiving layer comprising a layer comprising an amorphous material containing silicon atoms, at least a part of the layer region of which has photosensitivity and a surface layer comprising an amorphous material containing silicon atoms and carbon atoms.Type: GrantFiled: June 30, 1985Date of Patent: November 10, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Tetsuo Sueda, Kyosuke Ogawa, Teruo Misumi, Yoshio Tsuezuki, Masahiro Kanai
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Patent number: 4705735Abstract: A light-receiving member comprises a substrate having a large number of protruding portions on a surface thereof, each of said protruding portions having at a predetermined cut position a sectional shape comprising a main projection and a subprojection, the main projection and the subprojection overlapping each other, and a light-receiving layer of a multi-layer structure having a first layer comprising an amorphous material containing silicon atoms and germanium atoms, a second layer comprising an amorphous material containing silicon atoms and exhibiting photoconductivity and a surface layer having reflection preventive function provided on the substrate successively from the substrate side.Type: GrantFiled: June 4, 1985Date of Patent: November 10, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Tetsuo Sueda, Kyosuke Ogawa, Teruo Misumi, Yoshio Tsuezuki, Masahiro Kanai
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Patent number: 4705730Abstract: A light-receiving member comprises a substrate having a large number of projection parts, whose cross-sectional shape at a given cross-sectional position is a projection shape formed of a main peak and an auxiliary peak as overlapped, on the surface of the substrate, and a light-receiving layer comprising a layer containing an amorphous material including silicon atoms, at least one part of the layer region of the layer being photosensitive, and a surface layer having a reflection-preventive function.An electrophotographic system comprises the above-mentioned light-receiving member.Type: GrantFiled: May 31, 1985Date of Patent: November 10, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Tetsuo Sueda, Kyosuke Ogawa, Teruo Misumi, Yoshio Tsuezuki, Masahiro Kanai
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Patent number: 4701393Abstract: A light receiving member comprises a light receiving layer of a multi-layer structure having a first layer comprising an amorphous material containing silicon atoms and germanium atoms, a second layer comprising an amorphous material containing silicon atoms and exhibiting photoconductivity and a surface layer having reflection preventive function provided on a substrate successively from the substrate side, said light receiving layer having at least one pair of non-parallel interfaces within a short range and said non-parallel interfaces being arranged in a large number in at least one direction within the plane perpendicular to the layer thickness direction.Type: GrantFiled: April 4, 1985Date of Patent: October 20, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Masahiro Kanai, Tetsuo Sueda, Teruo Misumi, Yoshio Tsuezuki, Kyosuke Ogawa
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Patent number: 4701392Abstract: A light receiving member comprises a substrate for light receiving member, a surface layer having reflection preventive function and a light receiving layer of a multi-layer structure having at least one photosensitive layer comprising an amorphous material containing silicon atoms on the substrate, said light receiving layer having at least one pair of non-parallel interfaces within a short range and said non-parallel interfaces being arranged in a large number in at least one direction within the plane perpendicular to the layer thickness direction.Type: GrantFiled: April 4, 1985Date of Patent: October 20, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Masahiro Kanai, Tetsuo Sueda, Teruo Misumi, Yoshio Tsuezuki, Kyosuke Ogawa
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Patent number: 4696883Abstract: A light-receiving member comprises a substrate and a light-receiving layer of a multi-layer structure having at least one photosensitive layer and a surface layer having reflection preventive function provided successively from the substrate side; said light-receiving layer having at least one pair of non-parallel interfaces within a short range and said non-parallel interfaces being arranged in a large number in at least one direction within the plane perpendicular to the layer thickness direction; said non-parallel interfaces being connected to one another smoothly in the direction in which they are arranged.Type: GrantFiled: July 8, 1985Date of Patent: September 29, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Tetsuo Sueda, Kyosuke Ogawa, Teruo Misumi, Yoshio Tsuezuki, Masahiro Kanai
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Patent number: 4696884Abstract: A light-receiving member comprises a light-receiving layer of a multi-layer structure having at least one photosensitive layer on a substrate, said photosensitive layer having at least one pair of non-parallel interfaces within a short range and said non-parallel interfaces being arranged in a large number in at least one direction within the plane perpendicular to the layer thickness direction, each of said non-parallel interfaces being smoothly continuous in the direction in which they are arranged.Type: GrantFiled: February 26, 1985Date of Patent: September 29, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Masahiro Kanai, Tetsuo Sueda, Teruo Misumi, Yoshio Tsuezuki, Kyosuke Ogawa
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Patent number: 4696882Abstract: A light-receiving member comprises a substrate and a light-receiving layer of a multi-layer structure having a first layer comprising an amorphous material containing silicon atoms and germanium atoms and a second layer comprising an amorphous material containing silicon atoms and exhibiting photoconductivity provided successively from the substrate side, said light-receiving layer having at least one pair of non-parallel interfaces within a short range and said non-parallel interfaces being aranged in a large number in at least one direction within the plane perpendicular to the layer thickness direction, said non-parallel interfaces being connected to one another smoothly in the direction in which they are arranged.Type: GrantFiled: July 8, 1985Date of Patent: September 29, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Tetsuo Sueda, Kyosuke Ogawa, Teruo Misumi, Yoshio Tsuezuki, Masahiro Kanai