Patents by Inventor Kazuto Miyoshi

Kazuto Miyoshi 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: 10983436
    Abstract: The present invention provides a negative type photosensitive resin composition having high sensitivity, excellent halftone characteristics, capability to form a small tapered pattern shape, and alkali-developability. The negative type photosensitive resin composition includes, as an alkali-soluble resin (A), at least a weakly acidic group-containing resin (A1) and an unsaturated group-containing resin (A2), the weakly acidic group-containing resin (A1) containing an acidic group having an acid dissociation constant in the range of 13.0 to 23.0 in dimethyl sulfoxide, and the unsaturated group-containing resin (A2) containing an ethylenically unsaturated double bond group.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: April 20, 2021
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Yugo Tanigaki, Satoshi Kamemoto, Kazuto Miyoshi
  • Patent number: 10895807
    Abstract: The invention provides a cured film and a positive type photosensitive resin composition unlikely to cause a decrease in light emission luminance or shrinkage of pixels and high in long term reliability. [Solution] The invention provides a cured film comprising a cured product of a photosensitive resin composition including an alkali-soluble resin (a), a photoacid generating agent (b), at least one compound (c) selected from the group consisting of cyclic amides, cyclic ureas, and derivatives thereof, and a thermal crosslinking agent (d), the thermal crosslinking agent (d) containing an epoxy compound, oxetanyl compound, isocyanate compound, acidic group-containing alkoxymethyl compound, and/or acidic group-containing methylol compound, and the total content of the compound (c) in the cured film being 0.005 mass % or more and 5 mass % or less.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: January 19, 2021
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Yuta Shuto, Satoshi Kamemoto, Kazuto Miyoshi
  • Patent number: 10896942
    Abstract: The purpose is to provide an organic EL display device which has good sensitivity and is free from the occurrence of luminance decrease or pixel shrinkage, thereby having excellent long-term reliability. In order to achieve the above-described purpose, provided is the following configuration. Namely, an organic EL display device wherein an insulating layer formed on a first electrode is a cured film obtained by curing a photosensitive resin composition; and the residual amount of acid anhydrides contained in the cured film is from 0.003 to 0.04 (inclusive) when the residual amount of aromatic rings contained in the cured film is taken as 1 (the reference value).
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: January 19, 2021
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Takeshi Arai, Satoshi Kamemoto, Kazuto Miyoshi
  • Publication number: 20210011381
    Abstract: To provide an alkaline developable negative-type photosensitive resin composition from which a cured film that has a high-resolution and low-taper pattern shape and that are excellent in heat resistance and light blocking property can be obtained. A negative-type photosensitive resin composition is characterized by containing an (A1) first resin, a (A2) second resin, a (C) photopolymerization initiator, and a (D) coloring agent, wherein the (A1) first resin is an (A1-1) polyimide and/or an (A1-2) polybenzo-oxazole, and wherein the (A2) second resin is one or more species selected from a (A2-1) polyimide precursor, a (A2-2) polybenzo-oxazole precursor, a (A2-3) polysiloxane, a (A2-4) cardo based resin, and an (A2-5) acrylic resin, and wherein a content ratio of the (A1) first resin in a total of 100 mass % of the (A1) first resin and the (A2) second resin is within the range of 25 to 90 mass %.
    Type: Application
    Filed: September 9, 2020
    Publication date: January 14, 2021
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Yugo TANIGAKI, Satoshi KAMEMOTO, Kazuto MIYOSHI
  • Publication number: 20200356005
    Abstract: A problem to be addressed by the present invention is to obtain: a cured film that has high sensitivity, makes it possible to prevent generation of a development residue arising from a pigment, and has excellent heat resistance and light-blocking ability; and a negative photosensitive resin composition that is formed into the cured film.
    Type: Application
    Filed: January 15, 2019
    Publication date: November 12, 2020
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Yukinori TOGO, Yugo TANIGAKI, Kazuto MIYOSHI
  • Patent number: 10802401
    Abstract: To provide an alkaline developable negative-type photosensitive resin composition from which a cured film that has a high-resolution and low-taper pattern shape and that are excellent in heat resistance and light blocking property can be obtained. A negative-type photosensitive resin composition is characterized by containing an (A1) first resin, a (A2) second resin, a (C) photopolymerization initiator, and a (D) coloring agent, wherein the (A1) first resin is an (A1-1) polyimide and/or an (A1-2) polybenzo-oxazole, and wherein the (A2) second resin is one or more species selected from a (A2-1) polyimide precursor, a (A2-2) polybenzo-oxazole precursor, a (A2-3) polysiloxane, a (A2-4) cardo based resin, and an (A2-5) acrylic resin, and wherein a content ratio of the (A1) first resin in a total of 100 mass % of the (A1) first resin and the (A2) second resin is within the range of 25 to 90 mass %.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: October 13, 2020
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Yugo Tanigaki, Satoshi Kamemoto, Kazuto Miyoshi
  • Publication number: 20200319549
    Abstract: An object of the invention is to provide a cured film which is high in sensitivity, capable of forming a pattern in a low-taper shape, capable of the change in pattern opening width between before and after thermal curing, an excellent in light-blocking property, and a photosensitive resin composition that forms the film. The photosensitive resin composition contains an (A) alkali-soluble resin, a (C) photosensitive agent, a (Da) black colorant, and a (F) a cross-linking agent, where the (A) alkali-soluble resin contains a (A1) first resin including one or more selected from the group consisting of: a specific (A1-1) polyimide; a (A1-2) polyimide precursor; a (A1-3) polybenzoxazole; and a (A1-4) polybenzoxazole precursor, and contains a structural unit having a fluorine atom at a specific ratio, the content ratio of the (Da) black colorant is a specific ratio, and the (F) cross-linking agent contains an epoxy compound that has a specific structure, and/or an epoxy resin that has a specific structural unit.
    Type: Application
    Filed: September 27, 2018
    Publication date: October 8, 2020
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Yugo TANIGAKI, Kazuto MIYOSHI
  • Patent number: 10723884
    Abstract: Provided is a black pigment that enables pattern formation of pixel division layer while suppressing generation of development residue. The black pigment comprises (a) a core containing at least one organic black pigment selected from the group consisting of benzodifuranone-based black pigments, perylene-based black pigments, azo-based black pigments, and isomers thereof and (b) a coating layer containing silica and/or a metal oxide and/or a metal hydroxide.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: July 28, 2020
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Akihiro Ishikawa, Yugo Tanigaki, Kazuto Miyoshi
  • Publication number: 20200192227
    Abstract: A resin composition which is configured such that if the resin composition is formed into a resin composition film that has a thickness of 3.0 ?m after a heat treatment at a temperature within the range of 200-350° C., the resin composition film forms a heat-resistant resin film that has a light transmittance of 50% or more at a wavelength of 365-436 nm before the heat treatment, while having a light transmittance of 10% or less at a wavelength of 365-436 nm after the heat treatment. Provided is a resin composition having a function of absorbing ultraviolet light and visible light in a short wavelength range, which is suitable for the formation of a planarization film, an insulating layer and a partition wall that are used for organic light emitting devices or display devices.
    Type: Application
    Filed: February 25, 2020
    Publication date: June 18, 2020
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Keika HASHIMOTO, Kazuto MIYOSHI, Masao TOMIKAWA
  • Publication number: 20200110337
    Abstract: The invention aims to provide a cured film that is high in sensitivity, able to form a pattern having a small-tapered shape after a development step and after a heat curing step, helpful to depress the difference in the width of patterned openings between before and after the heat curing step, and high in light-shielding capability and also aims to provide a negative type photosensitive resin composition that serves for the production thereof.
    Type: Application
    Filed: March 27, 2018
    Publication date: April 9, 2020
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Yugo TANIGAKI, Kazuto MIYOSHI
  • Patent number: 10613439
    Abstract: The invention aims to provide a photosensitive colored resin composition and a heat resistant colored resin film produced therefrom that has the function of absorbing light in the shorter visible wavelength range with high sensitivity to serve effectively as planarizing film, insulation layer, and barrier rib used in organic luminescence apparatuses and display elements and the function of reducing external light reflection. The photosensitive colored resin composition includes an alkali-soluble resin (a), a photosensitive compound (b), and a compound (c) having an absorption maximum in the wavelength range of 400 nm or more and less than 490 nm, the photosensitive compound (b) containing a photosensitive compound (b1), the photosensitive compound (b1) being such that its maximum absorption wavelength in the range of 350 nm or more and 450 nm or less is located within the wavelength range of 350 nm or more and 390 nm or less.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: April 7, 2020
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Keika Hashimoto, Satoshi Kamemoto, Kazuto Miyoshi
  • Publication number: 20200091265
    Abstract: An organic EL display device includes a photosensitive resin composition including an (A) alkali-soluble resin, a (B) coloring agent, a (C) radical polymerizable compound, and a (D) photopolymerization initiator. The (A) alkali-soluble resin is an (A-1) alkali-soluble resin having a carboxy group. A sum of the content of at least one of a metal element and a halogen element in a non-volatile component measured by time-of-flight secondary ion mass spectrometry in a cured product formed by curing the photosensitive resin composition is 1×1017 atom/cm3 or larger and 1×1022 atom/cm3 or smaller. In an organic EL element constituted of at least a substrate, a first electrode, a second electrode, a light emitting pixel, a flattening layer, and a pixel division layer, the photosensitive resin composition is arranged in at least one of the flattening layer and the pixel division layer.
    Type: Application
    Filed: December 22, 2017
    Publication date: March 19, 2020
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Shinichi MATSUKI, Takeshi ARAI, Kazuto MIYOSHI
  • Publication number: 20200081344
    Abstract: An organic EL display device having excellent light-emitting reliability while it has pixel division layer (8) and/or planarization layer (4) having excellent optical properties is provided.
    Type: Application
    Filed: December 15, 2017
    Publication date: March 12, 2020
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Akihiro ISHIKAWA, Kazuto MIYOSHI
  • Publication number: 20200033728
    Abstract: A photosensitive composition containing at least one compound selected from the group of the following (a-1) to (a-3) and containing (b) a photosensitizer: (a-1) an epoxy compound having a C9-C19 long-chain alkyl group, (a-2) a resin having a structure represented by the following general formula (1), and (a-3) a resin having a structure represented by the following general formula (2). A photosensitive composition capable of forming a pixel division layer that has high flexibility and affords excellent light emission reliability to an organic EL display device is provided.
    Type: Application
    Filed: March 15, 2018
    Publication date: January 30, 2020
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Akihiro ISHIKAWA, Kazuto MIYOSHI
  • Publication number: 20200012191
    Abstract: The present invention provides a photosensitive resin composition which has a light-blocking property, and at the same time, a high sensitivity, and has excellent half-tone characteristics. The present invention provides a photosensitive resin composition including an (A) alkali-soluble resin, a (B) radically polymerizable compound, a (C) photo initiator, and a (D) colorant, where the (A) alkali-soluble resin contains a polyimide, a polyimide precursor, a polybenzoxazole precursor, and/or a copolymer thereof, and the (B) radically polymerizable compound contains a (B-1) bifunctional or higher (meth)acrylic compound that has a glass transition temperature of 150° C. or higher as a homopolymer, and a (B-2) tetrafunctional or higher (meth)acrylic compound other than the (B-1).
    Type: Application
    Filed: March 16, 2018
    Publication date: January 9, 2020
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Satoshi KAMEMOTO, Yugo TANIGAKI, Kazuto MIYOSHI
  • Publication number: 20190386217
    Abstract: The organic EL display device includes at least a transparent electrode, an organic EL layer, and a non-transparent electrode in this order and further includes a black insulating layer, and the non-transparent electrode has a reflectance of 25%±20%.
    Type: Application
    Filed: November 29, 2017
    Publication date: December 19, 2019
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Takeshi ARAI, Kazuto MIYOSHI
  • Publication number: 20190302617
    Abstract: The present invention provides a negative photosensitive resin composition that has high pigment dispersibility and stability and can reduce residues of unexposed portions during development. The present invention provides a negative photosensitive resin composition containing an (A) alkali-soluble resin, a (B) dispersant having an amine value exceeding 0, a (C) benzofuranone based organic pigment having an amide structure, a (D) radical polymerizable compound, and a (E) photoinitiator.
    Type: Application
    Filed: June 27, 2017
    Publication date: October 3, 2019
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Shinichi MATSUKI, Yugo TANIGAKI, Kazuto MIYOSHI
  • Publication number: 20190258164
    Abstract: The present invention provides a negative-type photosensitive resin composition capable of obtaining a cured film suppressing generation of development residues caused by a pigment and having high sensitivity and excellent heat resistance and light blocking capability. A negative-type photosensitive resin composition contains an alkali-soluble resin (A), a radical-polymerizable compound (B), a photopolymerization initiator (C1), and a pigment (D1).
    Type: Application
    Filed: August 22, 2017
    Publication date: August 22, 2019
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Yugo TANIGAKI, Akihiro ISHIKAWA, Kazuto MIYOSHI
  • Publication number: 20190241716
    Abstract: The present invention provides a resin composition having a high sensitivity and serving to produce a cured film with a low water absorption rate.
    Type: Application
    Filed: July 25, 2017
    Publication date: August 8, 2019
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Yusuke KOMORI, Kazuto MIYOSHI
  • Publication number: 20190218396
    Abstract: Provided is a black pigment that enables pattern formation of pixel division layer while suppressing generation of development residue. The black pigment comprises (a) a core containing at least one organic black pigment selected from the group consisting of benzodifuranone-based black pigments, perylene-based black pigments, azo-based black pigments, and isomers thereof and (b) a coating layer containing silica and/or a metal oxide and/or a metal hydroxide.
    Type: Application
    Filed: August 22, 2017
    Publication date: July 18, 2019
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Akihiro ISHIKAWA, Yugo TANIGAKI, Kazuto MIYOSHI