Patents by Inventor Takahiro Dazai

Takahiro Dazai 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: 11780948
    Abstract: A resin composition for forming a phase-separated structure includes a block copolymer having a block (b1) formed of a repeating structure of styrene units, the block (b1) being partially substituted with a constituent unit represented by the following General Formula (c1) and a block (b2) having a repeating structure of methyl methacrylate units.
    Type: Grant
    Filed: January 19, 2021
    Date of Patent: October 10, 2023
    Assignees: Tokyo Ohka Kogyo Co., Ltd., National University Corporation Hokkaido University
    Inventors: Ken Miyagi, Takahiro Dazai, Toshifumi Satoh, Takuya Isono, Shunma Tanaka
  • Patent number: 11472956
    Abstract: A resin composition for forming a phase-separated structure containing a block copolymer having a first block and a second block, in which the first block is formed of a constituent unit represented by Formula (b1), the second block is formed of a constituent unit represented by Formula (b2m) and a random copolymer having a constituent unit represented by Formula (b2g), and a ratio of a volume of the first block is 20% to 80% by volume.
    Type: Grant
    Filed: July 12, 2021
    Date of Patent: October 18, 2022
    Assignees: TOKYO OHKA KOGYO CO., LTD., TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Teruaki Hayakawa, Lei Dong, Takahiro Dazai, Ken Miyagi, Takayoshi Mori, Daisuke Kawana
  • Patent number: 11466114
    Abstract: A composition for forming a phase-separated structure contains a block copolymer having a block (b1) consisting of a repeating structure of a styrene unit and a block (b2) consisting of a repeating structure of a methyl methacrylate unit, in which the block (b2) is disposed at least at one terminal portion of the block copolymer, the block copolymer has a structure (e1) represented by General Formula (e1) at least at one main chain terminal, and the structure (e1) is bonded to the main chain terminal of the block (b2) disposed at a terminal portion of the block copolymer. Ree0 represents a hydrocarbon group containing a hetero atom, and Re1 represents a hydrogen atom or a halogen atom.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: October 11, 2022
    Assignees: TOKYO OHKA KOGYO CO., LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Ken Miyagi, Takahiro Dazai, Toshifumi Satoh, Takuya Isono
  • Publication number: 20220138305
    Abstract: [Problem] To easily and accurately perform authentication at low cost. [Means to Solve Problem] Provided is an authentication object C1 that serves as a target of authentication performed by an authentication system, comprising an authentication medium M1 having authentication information that includes a feature related to a pattern of a part of a phase separation structure formed on a substrate from a resin composition for phase separation structure formation and is to be acquired by an acquisition device provided in the authentication system.
    Type: Application
    Filed: January 22, 2020
    Publication date: May 5, 2022
    Inventors: Tsuyoshi KUROSAWA, Ken MIYAGI, Takahiro DAZAI
  • Publication number: 20220017741
    Abstract: A resin composition for forming a phase-separated structure containing a block copolymer having a first block and a second block, in which the first block is formed of a constituent unit represented by Formula (b1), the second block is formed of a constituent unit represented by Formula (b2m) and a random copolymer having a constituent unit represented by Formula (b2g), and a ratio of a volume of the first block is 20% to 80% by volume.
    Type: Application
    Filed: July 12, 2021
    Publication date: January 20, 2022
    Inventors: Teruaki HAYAKAWA, Lei DONG, Takahiro DAZAI, Ken MIYAGI, Takayoshi MORI, Daisuke KAWANA
  • Publication number: 20210230340
    Abstract: A resin composition for forming a phase-separated structure includes a block copolymer having a block (b1) formed of a repeating structure of styrene units, the block (b1) being partially substituted with a constituent unit represented by the following General Formula (c1) and a block (b2) having a repeating structure of methyl methacrylate units.
    Type: Application
    Filed: January 19, 2021
    Publication date: July 29, 2021
    Inventors: Ken MIYAGI, Takahiro DAZAI, Toshifumi SATOH, Takuya ISONO, Shunma TANAKA
  • Patent number: 10995234
    Abstract: A method of producing a structure containing a phase-separated structure, including: a step of using a resin composition for forming a phase-separated structure including a block copolymer and an ion liquid containing a compound (IL) having a cation moiety and an anion moiety to form a BCP layer (3) containing a block copolymer on a substrate (1); and a step of vaporizing at least a part of the compound (IL), and phase-separating the BCP layer (3) to obtain a structure (3?) containing a phase-separated structure.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: May 4, 2021
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Takahiro Dazai, Hitoshi Yamano, Akiya Kawaue, Ken Miyagi
  • Publication number: 20210017343
    Abstract: A method of producing a purified product of a resin composition for forming a phase-separated structure, the method including subjecting a resin composition for forming a phase-separated structure to filtration using a filter having a porous structure in which adjacent spherical cells are mutually communicating, the filter being provided with a porous membrane containing at least one resin selected from the group consisting of polyimide and polyamideimide, and the resin composition for forming a phase-separated structure including a block copolymer and an organic solvent component.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 21, 2021
    Inventors: Takahiro Dazai, Ken MIYAGI
  • Publication number: 20200369819
    Abstract: A composition for forming a phase-separated structure contains a block copolymer having a block (b1) consisting of a repeating structure of a styrene unit and a block (b2) consisting of a repeating structure of a methyl methacrylate unit, in which the block (b2) is disposed at least at one terminal portion of the block copolymer, the block copolymer has a structure (e1) represented by General Formula (e1) at least at one main chain terminal, and the structure (e1) is bonded to the main chain terminal of the block (b2) disposed at a terminal portion of the block copolymer. Ree0 represents a hydrocarbon group containing a hetero atom, and Re1 represents a hydrogen atom or a halogen atom.
    Type: Application
    Filed: May 19, 2020
    Publication date: November 26, 2020
    Inventors: Ken Miyagi, Takahiro Dazai, Toshifumi Satoh, Takuya Isono
  • Publication number: 20200183281
    Abstract: A resin composition for forming a phase-separated structure, the resin composition including a block copolymer, an ion liquid and an organic solvent component, the ion liquid containing a compound (IL) having a cation moiety and an anion moiety, and the organic solvent component containing an organic solvent (S1) having a boiling point of lower than 150° C., and an organic solvent (S2) having a boiling point of 150° C. or higher.
    Type: Application
    Filed: November 5, 2019
    Publication date: June 11, 2020
    Inventors: Takahiro DAZAI, Ken MIYAGI
  • Publication number: 20190284387
    Abstract: A method of producing a structure containing a phase-separated structure, including using a resin composition for forming a phase-separated structure including a block copolymer having a period L0 and an ion liquid containing a compound (IL) having a cation moiety and an anion moiety to form a BCP layer containing a block copolymer and having a thickness of d (nm) on a substrate; and vaporizing at least a part of the compound (IL), and phase-separating the BCP layer to obtain a structure containing a phase-separated structure, wherein, in step (i), the BCP layer is formed such that the period L0 (nm) of the block copolymer and the thickness d (nm) of the BCP layer satisfies the following formula (1): Thickness d/Period L0=n+a ??(1) wherein n represents an integer of 0 or more; and a is a number which satisfies 0<a<1.
    Type: Application
    Filed: March 12, 2019
    Publication date: September 19, 2019
    Inventors: Takahiro DAZAI, Ken MIYAGI
  • Publication number: 20190276698
    Abstract: A method of producing a structure containing a phase-separated structure, including: a step of using a resin composition for forming a phase-separated structure including a block copolymer and an ion liquid containing a compound (IL) having a cation moiety and an anion moiety to form a BCP layer (3) containing a block copolymer on a substrate (1); and a step of vaporizing at least a part of the compound (IL), and phase-separating the BCP layer (3) to obtain a structure (3?) containing a phase-separated structure.
    Type: Application
    Filed: September 26, 2017
    Publication date: September 12, 2019
    Inventors: Takahiro DAZAI, Hitoshi YAMANO, Akiya KAWAUE, Ken MIYAGI
  • Publication number: 20180171172
    Abstract: A resin composition for forming a phase-separated structure includes a block copolymer in which a hydrophilic block and a hydrophobic block are bonded to each other, and a solvent component (S) containing an organic solvent (S1) having a boiling point of 200° C. or higher.
    Type: Application
    Filed: December 15, 2017
    Publication date: June 21, 2018
    Inventors: Hitoshi YAMANO, Takahiro DAZAI, Tasuku MATSUMIYA
  • Publication number: 20180072564
    Abstract: A resin composition for forming a phase-separated structure includes a block copolymer having a block (b1) having a repeating structure of styrene units; a block (b2) having a repeating structure of methyl methacrylate units partially substituted with a constituent unit represented by general formula (h1); and a number average molecular weight of less than 28,000. In general formula (h1), Rh0 is a hydrophilic functional group.
    Type: Application
    Filed: July 18, 2017
    Publication date: March 15, 2018
    Inventors: Ken MIYAGI, Takehiro SESHIMO, Takaya MAEHASHI, Takahiro DAZAI, Hitoshi YAMANO, Toshifumi SATOH, Takuya ISONO
  • Patent number: 9690194
    Abstract: A method of forming a resist pattern using a resist composition containing a base component (A) which exhibits reduced solubility in an organic solvent under action of an acid and an acid-generator component (B) which generates an acid upon exposure, the base component (A) including a resin component (A1) having a structural unit (a0) derived from a compound represented by general formula (a0-1) shown below and a structural unit (a2) containing a lactone-containing cyclic group or the like (in formula (a0-1), Ra1 represents a monovalent substituent having a polymerizable group, La1 represents O, S or a methylene group, R1 represents a linear or branched hydrocarbon group of 2 to 20 carbon atoms which may have a substituent, or a cyclic hydrocarbon group which may have a hetero atom, and n represents an integer of 0 to 5).
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: June 27, 2017
    Assignee: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Tsuyoshi Nakamura, Takahiro Dazai, Masatoshi Arai
  • Patent number: 9644110
    Abstract: A method of producing a structure containing a phase-separated structure, including forming a layer containing a block copolymer on a substrate; applying a top coat material to the layer containing the block copolymer to form a top coat film; and subjecting the layer including the block copolymer having the top coat film formed thereon to annealing treatment so as to conduct a phase separation of the layer, the top coat material including an organic solvent component and a polymeric compound containing a structural unit having either a dicarboxylic acid or a salt of a dicarboxylic acid, and the organic solvent component containing water and an alcohol having 3 or more carbon atoms.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: May 9, 2017
    Assignee: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Takehiro Seshimo, Takaya Maehashi, Takahiro Dazai, Yoshiyuki Utsumi
  • Patent number: 9606433
    Abstract: There is provided a resist composition which generates acid upon exposure and exhibits changed solubility in a developing solution by the action of acid, including a base component (A) which exhibits changed solubility in a developing solution by the action of acid, wherein the base component (A) contains a polymeric compound (A1) having a structural unit (a0) represented by general formula (a0) shown below. In the formula, A? represents an oxygen atom, a sulfur atom or an alkylene group of 1 to 5 carbon atoms which may contain an oxygen atom or a sulfur atom; R1 represents a lactone-containing cyclic group, an —SO2— containing cyclic group or a carbonate-containing cyclic group; and W2 represents a group which is formed by polymerization reaction of a group containing a polymerizable group.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: March 28, 2017
    Assignee: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Yoshiyuki Utsumi, Masatoshi Arai, Takahiro Dazai, Yoshitaka Komuro
  • Patent number: 9567477
    Abstract: An undercoat agent used for phase separating a layer containing a block copolymer having a block of a structural unit derived from an (?-substituted) acrylate ester on a substrate, and which contains a resin component including a structural unit represented by formula (ba0-1), and/or a structural unit represented by formula (ba0-2), and a structural unit (ba0-3) having a substrate interacting group, wherein R represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms, R1 and R2 represent a halogen atom or an organic group of 1 to 20 carbon atoms which may contain an oxygen atom, a halogen atom, or a silicon atom, and n is 1 to 5.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: February 14, 2017
    Assignee: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Takehiro Seshimo, Tasuku Matsumiya, Takaya Maehashi, Takahiro Dazai, Yoshiyuki Utsumi
  • Patent number: 9442371
    Abstract: A method of producing a structure containing a phase-separated structure, including a step in which a layer including an Si-containing block copolymer having a plurality of blocks bonded is formed between guide patterns on a substrate; a step in which a solution of a top coat material is applied to the layer and the guide patterns so as to form a top coat film; and a step in which the layer including the Si-containing block copolymer and having the top coat film formed thereon is subjected to annealing treatment so as to conduct a phase separation of the layer; in which a solvent of the solution of the top coat material contains no basic substance.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: September 13, 2016
    Assignee: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Takehiro Seshimo, Takaya Maehashi, Takahiro Dazai, Yoshiyuki Utsumi, Tasuku Matsumiya, Ken Miyagi, Daiju Shiono, Tsuyoshi Kurosawa
  • Patent number: 9383642
    Abstract: A polymerization method of a high-molecular weight compound (A1) having a constituent unit (a0) derived from a compound represented by the following general formula (a0-1), which has excellent lithography properties, and is useful as a resist composition, the method including conducting polymerization using a mixed solvent containing 10 mass % or more of one or more of a cyclic ketone-based solvent, an ester-based solvent, and a lactone-based solvent. A resist composition containing the high-molecular weight compound (A1) and a method for forming a resist pattern using the same.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: July 5, 2016
    Assignee: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Takahiro Dazai, Masatoshi Arai, Yoshiyuki Utsumi