Patents by Inventor Yutaka Hirai

Yutaka Hirai 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: 11914248
    Abstract: An object of the invention is to provide a photo-alignment copolymer which makes it possible to produce a photo-alignment film having excellent solvent resistance and liquid crystal aligning properties, and a photo-alignment film and an optical laminate produced using the photo-alignment copolymer. A photo-alignment copolymer of the invention is a photo-alignment copolymer having a repeating unit A including a photo-alignment group represented by Formula (A) and a repeating unit B including a crosslinkable group represented by Formula (B).
    Type: Grant
    Filed: November 8, 2020
    Date of Patent: February 27, 2024
    Assignee: FUJIFILM Corporation
    Inventors: Yutaka Nozoe, Takashi Iizumi, Kazushige Nakagawa, Takahiro Kato, Miho Asahi, Hirofumi Omura, Yuki Hirai
  • Patent number: 6077718
    Abstract: A device for forming a deposited film is provided. It comprises (a) a reaction chamber; (b) a heating means for heating a substrate placed in the reaction chamber; (c) a starting gas introducing means for introducing starting gases into the reaction chamber, the gas introducing means having a means for introducing two or more kinds of gases alternately and intermittently into the reaction chamber; (d) a decomposing means for decomposing the starting gases in the reaction chamber so as to form a deposited film on the substrate heated by said heating means in the reaction chamber, the decomposing means having a light source which irradiates at least one kind of light into the reaction chamber to decompose the starting gases.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: June 20, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsuji Takasu, Hisanori Tsuda, Masafumi Sano, Yutaka Hirai
  • Patent number: 5966787
    Abstract: A process for producing a probe-driving mechanism. A laminate of a first and second insulating layer is placed on a support. Electrode layers and piezoelectric layers are successively laminated on the second insulating layer. Part of the support and second insulating layer is removed to form a cantilever.
    Type: Grant
    Filed: May 8, 1996
    Date of Patent: October 19, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaru Nakayama, Yutaka Hirai, Takayuki Yagi, Yuji Kasanuki, Keisuke Yamamoto, Yasuhiro Shimada, Yoshio Suzuki
  • Patent number: 5846320
    Abstract: A method for forming a crystal comprises applying a crystal forming treatment on a substrate having a free surface comprising a nonnucleation surface (S.sub.NDS) with small nucleation density and a nucleation surface (S.sub.NDL) exposed from said nonnucleation surface having a sufficiently small area for a crystal growing only from a single nucleus and having a greater nucleation density (ND.sub.L) than the nucleation density (ND.sub.S) of said non-nucleation surface (S.sub.NDS), thereby growing a single crystal from said single nucleus.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 8, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jinsho Matsuyama, Yutaka Hirai, Masao Ueki, Akira Sakai
  • Patent number: 5769950
    Abstract: A device for forming a deposited film is provided. It comprises (a) a reaction chamber; (b) a heating means for heating a substrate placed in the reaction chamber; (c) a starting gas introducing means for introducing starting gases into the reaction chamber, the gas introducing means having a means for introducing two or more kinds of gases alternately and intermittently into the reaction chamber; (d) a decomposing means for decomposing the starting gases in the reaction chamber so as to form a deposited film on the substrate heated by said heating means in the reaction chamber, the decomposing means having a light source which irradiates at least one kind of light into the reaction chamber to decompose the starting gases.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: June 23, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsuji Takasu, Hisanori Tsuda, Masafumi Sano, Yutaka Hirai
  • Patent number: 5756250
    Abstract: An electrophotographic apparatus employs a charger for charging a cylindrical photosensitive member having a photoconductive layer of amorphous silicon containing 10 to 40 atomic % hydrogen; an exposing station for imagewise exposing the member to form an electrostatic latent image; a developer station for developing the latent image to form a toner image; a transfer station for transferring the toner image to an image receiving sheet and a blade for cleaning the surface of the cylindrical member.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 26, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Hirai, Toshiyuki Komatsu, Katsumi Nakagawa, Teruo Misumi, Tadaji Fukuda
  • Patent number: 5753936
    Abstract: An image-forming member for electro-photography has a photoconductive layer comprising a hydrogenated amorphous semiconductor composed of silicon and/or germanium as a matrix and at least one chemical modifier such as carbon, nitrogen and oxygen contained in the matrix.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 19, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiyuki Komatsu, Yutaka Hirai, Katsumi Nakagawa, Tadaji Fukuda
  • Patent number: 5658703
    Abstract: A layer of amorphous silicon containing H, preferably 10-40 atomic % H, is used as a photoconductive layer for electrophotographic photosensitive member.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 19, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Hirai, Toshiyuki Komatsu, Katsumi Nakagawa, Teruo Misumi, Tadaji Fukuda
  • Patent number: 5640663
    Abstract: An electrophotographic process is conducted by charging a cylindrical photosensitive member having a photoconductive layer of amorphous silicon containing 10 to 40 atomic % hydrogen; imagewise exposing the member to form an electrostatic latent image; developing the latent image to form a toner image; transferring the toner image to an image receiving sheet and thereafter cleaning the surface of the cylindrical member with a cleaning blade.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 17, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Hirai, Toshiyuki Komatsu, Katsumi Nakagawa, Teruo Misumi, Tadaji Fukuda
  • Patent number: 5593497
    Abstract: A method for forming a deposited film comprises the step of introducing a starting material (A) which is either one of a gaseous starting material for formation of a deposited film and a gaseous halogenic oxidizing agent having the property of oxidative action on said starting material into a film forming space in which a substrate having a material which becomes crystal neclei for a deposited film to be formed or a material capable of forming crystal nuclei selectively scatteringly on its surface is previously arranged to have said starting material (A) adsorbed onto the surface of said substrate to form an adsorbed layer (I) and the step of introducing a starting material (B) which is the other one into said film forming space, thereby causing surface reaction on said adsorption layer (I) to form a crystalline deposited film (I).
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: January 14, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jinsho Matsuyama, Yutaka Hirai, Masao Ueki, Akira Sakai
  • Patent number: 5591492
    Abstract: A process for forming a deposited film comprises the steps of:(a) arranging previously a substrate for formation of a deposited film in a film forming space;(b) forming a deposited film on said substrate by introducing an activated species (A) formed by decomposition of a compound (SX) containing silicon and a halogen and an activated species (B) formed from a chemical substance (B) for film formation which is chemically mutually reactive with said activated species (A) separately from each other into said film forming space to effect chemical reaction therebetween; and(c) exposing the deposited film growth surface to a gaseous substance (E) having etching action on the deposited film to be formed during the film forming step (b) to apply etching action on the deposited film growth surface, thereby effecting preferentially crystal growth in a specific face direction.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: January 7, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Hirai, Jinsho Matsuyama, Shigeru Shirai
  • Patent number: 5585149
    Abstract: A layer of amorphous silicon containing H, preferably 10-40 atomic % H, which is used as a photoconductive layer for electrophotographic photosensitive member, is formed by plasma CVD using a silane gas of a higher than monosilane.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: December 17, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Hirai, Toshiyuki Komatsu, Katsumi Nakagawa, Teruo Misumi, Tadaji Fukuda
  • Patent number: 5576060
    Abstract: A CVD process of forming a hydrogenated amorphous silicon film comprising not more than 40 atomic percent of hydrogen atoms is disclosed, which comprises introducing a silicon-containing gas and a gas containing impurity for controlling conductivity of said film into a film-forming space, wherein the concentration of the gas containing the impurity is controlled during film formation to vary the content of the impurity in the thickness direction of the amorphous silicon film.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 19, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Hirai, Toshiyuki Komatsu, Katsumi Nakagawa
  • Patent number: 5573884
    Abstract: An image-forming member for electro-photography has a photoconductive layer comprising a hydrogenated amorphous semiconductor composed of silicon and/or germanium as a matrix and at least one chemical modifier such as carbon, nitrogen and oxygen contained in the matrix.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 12, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiyuki Komatsu, Yutaka Hirai, Katsumi Nakagawa, Tadaji Fukuda
  • Patent number: 5554851
    Abstract: A parallel plane holding mechanism is constructed as follows. Beams are provided on the peripheral portion of a flat plate-shaped weight member. A base plate is provided so as to face the weight member. First and second electrodes are provided on both surfaces of the weight member and the base plate to face each other. A voltage is applied between the first electrode and the second electrode so that the distance between the weight member and the base plate is controlled to move the weight member to thereby hold a reference surface of the weight member to be parallel to a predetermined reference surface.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: September 10, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Hirai, Osamu Takamatsu, Katsunori Hatanaka, Masaru Nakayama, Hiroyasu Nose, Takayuki Yagi, Yasuhiro Shimida
  • Patent number: 5506829
    Abstract: A cantilever probe comprising a cantilever displacement element containing a piezoelectric material provided between driving electrodes for causing displacement of the piezoelectric material, a probe for information input and output provided on the free end of the element, a drawing electrode for the probe and, a non-electroconductive thin film provided on at least a portion of an end of the element.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: April 9, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Yagi, Yutaka Hirai, Osamu Takamatsu, Masaru Nakayama, Yuji Kasanuki, Yasuhiro Shimada, Keisuke Yamamoto, Yoshio Suzuki
  • Patent number: 5485020
    Abstract: In a semiconductor device comprising a wiring to be connected to the source region or the drain region of a thin film transistor, at least a portion of the wiring comprising a wiring part having the same cross-sectional structure as said source region or said drain region, and said wiring part being formed continuously with said source region or said drain region simultaneously with the respective end portions of said wiring portions, said source region and said drain region formed in such a manner that the edge thereof is set back from the end of the semiconductor layer constituting the thin film transistor.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: January 16, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Hirai, Yoshiyuki Osada, Takashi Nakagiri, Katsunori Hatanaka
  • Patent number: 5357108
    Abstract: A cantilever type displacement element comprises a piezoelectric layer and at least two electrodes for applying a voltage to said piezoelectric layer, at least one of said electrodes being a comb-shaped electrode pair having respectively comb-tooth portions disposed separately as facing and alongside of each other in the width direction of the cantilever.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: October 18, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshio Suzuki, Yutaka Hirai, Osamu Takamatsu, Masaru Nakayama, Takayuki Yagi, Yuji Kasanuki, Keisuke Yamamoto, Yasuhiro Shimada
  • Patent number: 5349858
    Abstract: An angular acceleration sensor has a weight member, a resilient member for supporting the weight member from the both sides thereof, the resilient member being disposed on a predetermined rotational axis and supporting the weight member for rotation about the rotational axis, and an opposed member opposed to the weight member, an angular acceleration applied to the weight member being detected from a variation in the spacing between the opposed member and the weight member resulting from the rotation of the weight member
    Type: Grant
    Filed: January 28, 1992
    Date of Patent: September 27, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Yagi, Yutaka Hirai, Osamu Takamatsu, Masaru Nakayama, Hiroyasu Nose, Katsuhiko Shinjo, Yasuhiro Simada
  • Patent number: RE35198
    Abstract: Image-forming member for electrophotography comprising a charge generation layer composed of hydrogenated amorphous silicon.
    Type: Grant
    Filed: September 15, 1993
    Date of Patent: April 2, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsumi Nakagawa, Toshiyuki Komatsu, Yutaka Hirai, Teruo Misumi, Tadaji Fukuda