Patents by Inventor Akio Tamura

Akio Tamura 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: 11335772
    Abstract: Provided is a semiconductor device including a semiconductor substrate doped with impurities, a front surface-side electrode provided on a front surface side of the semiconductor substrate, a back surface-side electrode provided on a back surface side of the semiconductor substrate, wherein the semiconductor substrate has a peak region arranged on the back surface side of the semiconductor substrate and having one or more peaks of impurity concentration, a high concentration region arranged closer to the front surface than the peak region and having a gentler impurity concentration than the one or more peaks, and a low concentration region arranged closer to the front surface than the high concentration region and having a lower impurity concentration than the high concentration region.
    Type: Grant
    Filed: August 19, 2020
    Date of Patent: May 17, 2022
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Takahiro Tamura, Yuichi Onozawa, Takashi Yoshimura, Hiroshi Takishita, Akio Yamano
  • Patent number: 11319393
    Abstract: An object of the present invention is to provide a photo-alignable polymer which has excellent coating properties, is capable of suppressing film thickness unevenness, and has excellent upper layer coating properties and good liquid crystal alignment properties after being formed as a layer; a binder composition; a binder layer; an optical laminate; a method for producing an optical laminate; and an image display device. The photo-alignable polymer of an embodiment of the present invention is a photo-alignable polymer having a repeating unit A including a cleavage group capable of decomposing by an action of at least one selected from the group consisting of light, heat, an acid, and a base to generate a polar group, in which the repeating unit A has the cleavage group in a side chain, has a fluorine atom or a silicon atom on a side closer to a terminal than the cleavage group in the side chain, and the photo-alignable polymer satisfies Condition 1 or Condition 2 shown below.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: May 3, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Akio Tamura, Reiko Inushima, Takashi Iizumi, Yutaka Nozoe, Hideyuki Nishikawa, Kazushige Nakagawa, Kunihiro Atsumi
  • Publication number: 20220115580
    Abstract: The present invention provides a polymer-based piezoelectric composite material from which a piezoelectric film capable of outputting a higher sound pressure is obtained in a case of using a piezoelectric speaker, a piezoelectric film formed of the polymer-based piezoelectric composite material, and a piezoelectric speaker and a flexible display which are formed of the piezoelectric film. The polymer-based piezoelectric composite material of the present invention is a polymer-based piezoelectric composite material including a polymer matrix which contains a polymer having a unit represented by Formula (1), and at least one unit selected from the group consisting of, a unit represented by Formula (2-1), a unit represented by Formula (2-2), and a unit represented by Formula (2-3), and piezoelectric particles.
    Type: Application
    Filed: December 20, 2021
    Publication date: April 14, 2022
    Applicant: FUJIFILM Corporation
    Inventor: Akio TAMURA
  • Publication number: 20220056228
    Abstract: A hardcoat film includes: a substrate; and a hardcoat layer, in which the hardcoat film satisfies the following Formulas (i) and (ii), (i) E?(0.4)HC×dHC?8,000 MPa·?m, (ii) E?(4)HC×dHC?4,000 MPa·?m, E?(0.4)HC is an elastic modulus of the hardcoat layer obtained in a case where an elongation rate is 0.4%, E?(4)HC is an elastic modulus of the hardcoat layer obtained in a case where an elongation rate is 4%, and dHC is a film thickness of the hardcoat layer.
    Type: Application
    Filed: November 8, 2021
    Publication date: February 24, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Nobuyuki AKUTAGAWA, Ayako MATSUMOTO, Yuta FUKUSHIMA, Akio TAMURA, Tetsu KITAMURA, Yuzo NAGATA
  • Patent number: 11230669
    Abstract: The present invention provides a liquid crystal film having an optically anisotropic layer having excellent alignment and excellent adhesiveness. The present invention further provides an optical laminate, a circularly polarizing plate, and an organic EL display device, each of which uses the optically anisotropic layer. The liquid crystal film of an embodiment of the present invention is a liquid crystal film having at least an optically anisotropic layer formed with a liquid crystal composition including a polymerizable liquid crystal compound and a fluoroaliphatic group-containing copolymer, and a support, in which the fluoroaliphatic group-containing copolymer has a repeating unit derived from a fluoroaliphatic group-containing monomer represented by General Formula (1) and a repeating unit having a polymerizable group polymerizable with the polymerizable liquid crystal compound.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: January 25, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Nobuyuki Akutagawa, Keisuke Yoshimasa, Akio Tamura, Reiko Inushima, Tetsu Kitamura
  • Publication number: 20220019101
    Abstract: The present invention is to provide a laminated glass having excellent impact resistance and a projection image display system. The laminated glass of the present invention includes a first glass plate, an alignment film containing a vinyl alcohol resin, a retardation layer formed of a composition containing a polymerizable liquid crystal compound and a compound represented by Formula (1), a cholesteric liquid crystal layer, and a second glass plate in this order.
    Type: Application
    Filed: September 28, 2021
    Publication date: January 20, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Tetsu KITAMURA, Shusuke ARITA, Akio TAMURA
  • Publication number: 20210363306
    Abstract: A polyorganosilsesquioxane includes: a constitutional unit (a) having a fluorine atom-containing group; a constitutional unit (b) having a cationically polymerizable group; and a constitutional unit (c) having a radically polymerizable group.
    Type: Application
    Filed: August 4, 2021
    Publication date: November 25, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Yuzo NAGATA, Tetsu KITAMURA, Reiko INUSHIMA, Akio TAMURA, Nobuyuki AKUTAGAWA
  • Publication number: 20210284866
    Abstract: A hardcoat film has a substrate, a hardcoat layer, and an anti-scratch layer in this order. The anti-scratch layer contains a cured product of polyorganosilsesquioxane (c1) having a group containing a radically polymerizable double bond.
    Type: Application
    Filed: December 29, 2020
    Publication date: September 16, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Yuta FUKUSHIMA, Akio TAMURA, Tetsu KITAMURA
  • Patent number: 11111437
    Abstract: A liquid crystal composition contains a liquid crystal compound; a photo-alignment compound; and a polymer obtained by polymerizing a monomer having two or more radically polymerizable double bonds and one or more hydroxyl groups.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: September 7, 2021
    Assignee: FUJIFILM Corporation
    Inventor: Akio Tamura
  • Patent number: 10920012
    Abstract: A copolymer includes a repeating unit represented by Formula (I); and a repeating unit represented by Formula (II), in Formula (I), R1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; R2 represents an alkyl group having 1 to 20 carbon atoms and having at least one fluorine atom as a substituent, or a group including —Si(Ra3)(Ra4)O—; L represents a divalent linking group as defined herein; and Ra3 and Ra4 each independently represent an alkyl group as defined herein, in Formula (II), R10 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; R11 and R12 each independently represent a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group; R11 and R12 may be linked to each other; and X1 represents a divalent linking group.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: February 16, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Akio Tamura, Reiko Fukagawa, Taketo Otani
  • Publication number: 20210024738
    Abstract: The present invention provides a functional film including a copolymer that contains a repeating unit represented by Formula (I) and a repeating unit represented by Formula (II) shown in the description, or a crosslinked reaction product derived from the copolymer; a polarizing plate having this functional film; and a display device.
    Type: Application
    Filed: October 6, 2020
    Publication date: January 28, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Taketo OTANI, Daiki WAKIZAKA, Reiko FUKAGAWA, Akio TAMURA
  • Publication number: 20210023827
    Abstract: A hardcoat film has a substrate, a hardcoat layer, and a mixed layer in this order. The hardcoat layer contains a cured product of polyorganosilsesquioxane (a1) having an epoxy group. The mixed layer contains a cured product of a compound (b1) having an epoxy group and a cured product of a compound (b2) having two or more (meth)acryloyl groups in one molecule.
    Type: Application
    Filed: September 30, 2020
    Publication date: January 28, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Yuta FUKUSHIMA, Ayako MATSUMOTO, Tetsu KITAMURA, Akio TAMURA, Keigo UEKI
  • Publication number: 20200398542
    Abstract: A hardcoat film includes a substrate; a hardcoat layer; and an anti-scratch layer, where the hardcoat layer includes a cured product of polyorganosilsesquioxane, the polyorganosilsesquioxane has a siloxane constitutional unit containing a (meth)acryloyl group and a siloxane constitutional unit containing an epoxy group and is represented by the General Formula (1), a film thickness of the anti-scratch layer is 0.05 to 5 ?m, and the anti-scratch layer includes a cured product of a compound having two or more (meth)acryloyl groups in one molecule, where Ra represents a group containing a (meth)acryloyl group; Rb represents a group containing an epoxy group; Rc represents a monovalent substituent; p, q, and r represent a proportion of Ra, Rb, and Rc in the General Formula (1) respectively; p+q+r is 100; p and q are greater than 0; r is equal to or greater than 0; p/q is 0.01 to 99.
    Type: Application
    Filed: September 2, 2020
    Publication date: December 24, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Tetsu Kitamura, Akio Tamura, Yuta Fukushima
  • Publication number: 20200399503
    Abstract: A composition for forming a hardcoat layer includes a polyorganosilsesquioxane; and a polymerization initiator, in which the polyorganosilsesquioxane has, at least, a siloxane constitutional unit containing an oxetanyl group and a siloxane constitutional unit containing an epoxy group and is represented by the General Formula (1), in the General Formula (1), Ra represents a group containing an oxetanyl group; Rb represents a group containing an epoxy group; Rc represents a monovalent substituent; Ra, Rb, and Rc each have a structure including none of an amide bond, a urea bond, and a urethane bond; p and q represent an integer equal to or greater than 1; r represents an integer equal to or greater than 0; p/q is equal to or greater than 1.0 and less than 99.
    Type: Application
    Filed: September 2, 2020
    Publication date: December 24, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Tetsu KITAMURA, Akio TAMURA, Yuta FUKUSHIMA
  • Patent number: 10871597
    Abstract: Provided are a polarizing plate including a polarizer and a polarizing plate protective film laminated on the polarizer, in which the polarizing plate protective film contains at least one compound represented by any one of General Formulas (1) to (3) and cellulose acylate; an image display device using the polarizing plate; and a polarizing plate protective film used for the polarizing plate, and R7—N?C?N—R8??General Formula (3) in which R1 to R8 represent a specific substituent.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: December 22, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Naoki Sano, Nobutaka Fukagawa, Akio Tamura
  • Patent number: 10836895
    Abstract: The present invention provides a functional film including a copolymer that contains a repeating unit represented by Formula (I) and a repeating unit represented by Formula (II) shown in the description, or a crosslinked reaction product derived from the copolymer; a polarizing plate having this functional film; and a display device.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: November 17, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Taketo Otani, Daiki Wakizaka, Reiko Fukagawa, Akio Tamura
  • Patent number: 10641938
    Abstract: According to the present invention, there are provided a film forming composition, which contains a polymer having a repeating unit represented by General Formula (I) and a curable compound, an optical film having a film formed of the composition, a hardcoat film, a polarizing plate, and a method for manufacturing a hydrophilized hardcoat film. In General Formula (I), R1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, L represents an ester bond, an ether bond, a phenylene group, or an amide bond, R2 and R4 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, or a halogenated alkyl group having 1 to 20 carbon atoms, and R3 represents a hydrogen atom or a substituent.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: May 5, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Akio Tamura, Taketo Otani, Reiko Fukagawa
  • Publication number: 20200115480
    Abstract: A fluorine-containing copolymer composition includes repeating units derived from a fluorine-containing monomer represented by Formula (I) and from a monomer having at least two polymerizable groups, in which the latter is 3% by mass or more with respect to a total mass of the fluorine-containing copolymer, and the former is 15% by mass or more with respect to a total solid content in the composition, in the Formula (I), R1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; R2 represents a group having at least one fluorine atom; and L1 represents a divalent linking group including at least one selected from the group consisting of —O—, —(C?O)O—, —O(C?O)—, —(C?O)NH—, —NH(C?O)—, a divalent aromatic group which may have a substituent, a divalent aliphatic chain group which may have a substituent, and a divalent aliphatic cyclic group which may have a substituent.
    Type: Application
    Filed: December 12, 2019
    Publication date: April 16, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Reiko FUKAGAWA, Akio TAMURA, Taketo OTANI
  • Publication number: 20200109333
    Abstract: The present invention provides a liquid crystal film having an optically anisotropic layer having excellent alignment and excellent adhesiveness. The present invention further provides an optical laminate, a circularly polarizing plate, and an organic EL display device, each of which uses the optically anisotropic layer. The liquid crystal film of an embodiment of the present invention is a liquid crystal film having at least an optically anisotropic layer formed with a liquid crystal composition including a polymerizable liquid crystal compound and a fluoroaliphatic group-containing copolymer, and a support, in which the fluoroaliphatic group-containing copolymer has a repeating unit derived from a fluoroaliphatic group-containing monomer represented by General Formula (1) and a repeating unit having a polymerizable group polymerizable with the polymerizable liquid crystal compound.
    Type: Application
    Filed: December 9, 2019
    Publication date: April 9, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Nobuyuki AKUTAGAWA, Keisuke YOSHIMASA, Akio TAMURA, Reiko INUSHIMA, Tetsu KITAMURA
  • Patent number: 10597478
    Abstract: A composition for preparing an optical functional layer capable of forming an optical film having an excellent surface condition and excellent lamination properties with another layer, includes a liquid crystal compound and a copolymer, and the copolymer includes a constitutional unit corresponding to a fluoroaliphatic group-containing monomer represented by Formula I, and a constitutional unit corresponding to a monomer represented by Formula II. In Formulae I and II, R1, R10, and R3 each independently represent a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, R2 represents an alkyl group having 1 to 20 carbon atoms in which at least one carbon atom has a fluorine atom as a substituent, and L represents a divalent linking group constituted by at least one selected from the group consisting of —O—, —(C?O)O—, —O(C?O)—, a divalent chain group, and a divalent aliphatic cyclic group.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: March 24, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Akio Tamura, Nobuyuki Akutagawa