Patents by Inventor Yasuyuki Akai

Yasuyuki Akai 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: 11702557
    Abstract: An object of the present invention is to provide an ink composition for manufacturing an organic semiconductor device, the ink composition allowing an organic semiconductor material with a rigid main chain into an ink having an optimal solute concentration for a single-crystal formation process. The present invention provides an ink composition for manufacturing an organic semiconductor device, the ink composition including at least one solvent selected from Naphthalene Compound (A) and at least one solute. The isomer content of Naphthalene Compound (A) is preferably 2% or less in terms of a percentage for peak area with Naphthalene Compound (A) being 100% in gas chromatography. Naphthalene Compound (A): a compound represented by Formula (a), where in Formula (a), R is as defined in the description.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: July 18, 2023
    Assignee: DAICEL CORPORATION
    Inventors: Yasuyuki Akai, Takeshi Yokoo
  • Publication number: 20230170107
    Abstract: Provided is a conductor material having high conductivity. The conductor material according to an embodiment of the present disclosure has a configuration in which a conjugated polymeric compound having an electron donating group containing a heteroatom in a side chain is doped with a dopant containing an anion selected from a nitrogen anion, a boron anion, a phosphorus anion and an antimony anion, and a counter cation. The anion is preferably an anion represented by Formula (1) below: where R1 and R2 are identical or different, and each represent an electron withdrawing group; and R1 and R2 may be bonded to each other to form a ring with an adjacent nitrogen atom.
    Type: Application
    Filed: April 27, 2021
    Publication date: June 1, 2023
    Applicants: THE UNIVERSITY OF TOKYO, DAICEL CORPORATION
    Inventors: Toshihiro OKAMOTO, Tadanori KUROSAWA, Yu YAMASHITA, Junichi TAKEYA, Daiji IKEDA, Takeshi YOKOO, Yasuyuki AKAI
  • Patent number: 11655381
    Abstract: The present invention provides a solvent composition for use in an ink for producing an electronic device using a printing method, the solvent composition being capable of improving the printing accuracy of the ink, being fired at low temperatures, and suppressing the amount of ash remaining after firing to a very low amount. The solvent composition for electronic device production of the present invention is for use in an ink for producing an electronic device by a printing method, and contains a miscible product of: a solvent and a compound represented by Formula (1) below. In Formula (1), R represents the same or different aliphatic hydrocarbon groups having 1 or more carbon atoms.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: May 23, 2023
    Assignee: DAICEL CORPORATION
    Inventors: Hiroyuki Fujii, Yasuyuki Akai, Youji Suzuki
  • Publication number: 20230151141
    Abstract: Provided is a dopant with which a conductor material having high electrical conductivity can be formed. The present disclosure relates to a dopant containing a radical cation represented by Formula (1) and a counter anion. In Formula (1), R1 to R3 may be the same or different, and each denotes a monovalent aromatic group or a group represented by Formula (r). at least one of R1 to R3 is a group represented by Formula (r), and n indicates the valence of the radical cation and is equal to the quantity (n) of nitrogen atoms in the formula. In Formula (r), Ar1, Ar2, and Ar3 may be the same or different, and each denotes a divalent aromatic group, and Ar4, Ar5, Ar6, and Ar7 may be the same or different, and each denotes a monovalent aromatic group optionally having a substituent represented by Formula (sb) below. Furthermore, m and n may be the same or different, and each represents an integer of 0 or greater.
    Type: Application
    Filed: April 15, 2021
    Publication date: May 18, 2023
    Applicants: THE UNIVERSITY OF TOKYO, DAICEL CORPORATION
    Inventors: Toshihiro OKAMOTO, Tadanori KUROSAWA, Junichi TAKEYA, Daiji IKEDA, Takeshi YOKOO, Yasuyuki AKAI
  • Publication number: 20230128569
    Abstract: Provided is a compound that is excellent in chemical stability, has a high solubility in a solvent, and exhibits an excellent carrier mobility. A compound represented by Formula (1): where in Formula (1), X1, X2, X3, and R1 to R10 are as defined in the specification.
    Type: Application
    Filed: February 19, 2020
    Publication date: April 27, 2023
    Applicants: DAICEL CORPORATION, THE UNIVERSITY OF TOKYO
    Inventors: Daiji IKEDA, Takeshi YOKOO, Yasuyuki AKAI, Toshihiro OKAMOTO, Tadanori KUROSAWA, Junichi TAKEYA, Dinghai CEN
  • Publication number: 20220336119
    Abstract: A novel dopant according to the present disclosure includes an anion represented by the following Formula (1) and a counter cation. In Formula (1), R1 and R2 may be each at least one group selected from a nitro group, a cyano group, an acyl group, a carboxyl group, an alkoxycarbonyl group, a haloalkyl group, a sulfo group, an alkylsulfonyl group, an halosulfonyl group, and a haloalkylsulfonyl group, or may be a group formed by R1 and R2 bonded to each other [—SO2-L-SO2—] (where L represents a haloalkylene group). The counter cation may be a radical cation represented by Formula (2), where R1 and R2 represent electron-withdrawing groups that may be bonded to each other to form a heterocycle, and R3 to R5 represent a hydrogen atom, a hydrocarbon group that may have a substituent, or a heterocyclic group that may have a substituent. The dopant is capable of forming an electroconductive composition that shows a high conductivity.
    Type: Application
    Filed: August 17, 2020
    Publication date: October 20, 2022
    Applicants: The University of Tokyo, Daicel Corporation
    Inventors: Toshihiro OKAMOTO, Tadanori KUROSAWA, Junichi TAKEYA, Daiji IKEDA, Yasuyuki AKAI
  • Publication number: 20220275247
    Abstract: An object of the present disclosure is to provide a paste that can suppress fluctuations in viscosity at a printing temperature to perform printing without unevenness, and is sintered fast even in an inert gas atmosphere such as nitrogen to form a highly accurate conductive wiring and a joined structure excellent in joining strength. The present disclosure provides an adhesive conductive paste for forming a conductive wiring and/or a joined structure to connect electronic elements, the adhesive conductive paste including a conductive particle and a solvent. The adhesive conductive paste contains, as the conductive particle, a silver particle (A) having an average particle size of 1 nm or greater and less than 100 nm and a silver particle (B) having an average particle size of 0.
    Type: Application
    Filed: August 4, 2020
    Publication date: September 1, 2022
    Applicant: DAICEL CORPORATION
    Inventors: Takanori KOBATAKE, Tomoya EGAWA, Yasuyuki AKAI
  • Publication number: 20210246325
    Abstract: An object of the present invention is to provide an ink composition for manufacturing an organic semiconductor device, the ink composition allowing an organic semiconductor material with a rigid main chain into an ink having an optimal solute concentration for a single-crystal formation process. The present invention provides an ink composition for manufacturing an organic semiconductor device, the ink composition including at least one solvent selected from Naphthalene Compound (A) and at least one solute. The isomer content of Naphthalene Compound (A) is preferably 2% or less in terms of a percentage for peak area with Naphthalene Compound (A) being 100% in gas chromatography. Naphthalene Compound (A): a compound represented by Formula (a), where in Formula (a), R is as defined in the description.
    Type: Application
    Filed: September 12, 2019
    Publication date: August 12, 2021
    Applicant: DAICEL CORPORATION
    Inventors: Yasuyuki AKAI, Takeshi YOKOO
  • Publication number: 20210115272
    Abstract: The present invention provides a solvent composition for use in an ink for producing an electronic device using a printing method, the solvent composition being capable of improving the printing accuracy of the ink, being fired at low temperatures, and suppressing the amount of ash remaining after firing to a very low amount. The solvent composition for electronic device production of the present invention is for use in an ink for producing an electronic device by a printing method, and contains a miscible product of: a solvent and a compound represented by Formula (1) below. In Formula (1), R represents the same or different aliphatic hydrocarbon groups having 1 or more carbon atoms.
    Type: Application
    Filed: April 25, 2018
    Publication date: April 22, 2021
    Applicant: DAICEL CORPORATION
    Inventors: Hiroyuki FUJII, Yasuyuki AKAI, Youji SUZUKI
  • Patent number: 10892424
    Abstract: Provided is a composition for manufacturing an organic semiconductor device, the composition enabling formation of an organic semiconductor device that stably shows high carrier mobility. A composition for manufacturing an organic semiconductor device contains 2,3-dihydrobenzofuran as a solvent and an organic semiconductor material below, in which the water content of the solvent is 0.25 wt % or less. The organic semiconductor material: at least one compound selected from the group consisting of a compound represented by formula (1-1), a compound represented by formula (1-2), a compound represented by formula (1-3), a compound represented by formula (1-4), a compound represented by formula (1-5), and a compound represented by formula (1-6).
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: January 12, 2021
    Assignee: DAICEL CORPORATION
    Inventors: Takeshi Yokoo, Youji Suzuki, Yasuyuki Akai
  • Patent number: 10693080
    Abstract: Provided is a solvent for organic transistor production. The solvent has excellent solubility for organic semiconductor materials and enables formation of an organic transistor having high crystallinity. The solvent according to the present invention for organic transistor production includes a solvent A represented by Formula (a). In the formula, Ring Z represents a ring selected from an aromatic carbon ring, a 5- to 7-membered alicyclic carbon ring, and a 5- to 7-membered heterocyclic ring; R1 represents a group selected from oxo, thioxy, —ORa, —SRa, —O(C?O)Ra, —RbO(C?O)Ra, and substituted or unsubstituted amino; and R2 represents a group selected from hydrogen, C1-C7 alkyl, aryl, and —ORa, where R1 and R2 may be linked to each other to form a ring with one or more carbon atoms constituting Ring Z.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: June 23, 2020
    Assignee: DAICEL CORPORATION
    Inventors: Youji Suzuki, Takeshi Yokoo, Yasuyuki Akai
  • Patent number: 10418559
    Abstract: Solvent or solvent composition for organic transistor production, which is excellent in solubility of an organic semiconductor material, and which can form an organic transistor high in crystallinity. The solvent or solvent composition for organic transistor is a solvent or solvent composition for organic semiconductor material dissolution, and includes a solvent ‘A’ represented by the formula (R1)N(R2)—C(?O)—(R3)N(R4) wherein R1 to R4 are the same or different, and each represents a C1-2 alkyl group, or R1 and R4 may be bound to one another to form a ring together with the —N(R2)—C(?O)—N(R3)— moiety as well as an organic semiconductor material.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: September 17, 2019
    Assignee: DAICEL CORPORATION
    Inventors: Youji Suzuki, Takeshi Yokoo, Yasuyuki Akai
  • Patent number: 10373729
    Abstract: Provided is an insulating coating composition. The composition is highly safe, in which an organic material to form an insulating film is dissolved highly stably. The composition can form an insulating film by coating, where the insulating film has a low relative permittivity, a high insulation resistance, and high wettability and allows an upper layer to be formed thereon by coating. The insulating coating composition according to the present invention contains a cyclic olefin copolymer and a solvent. The cyclic olefin copolymer is a copolymer between a cyclic olefin and a chain olefin. The solvent includes a compound represented by Formula (1) and having a normal boiling point of 100° C. to lower than 300° C. In Formula (1), Ring Z is a ring selected from a 5- or 6-membered saturated or unsaturated cyclic hydrocarbon and a benzene ring; and R1 is selected from a hydrocarbon group and acyl. Ring Z has a substituent or substituents including the R1O group.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: August 6, 2019
    Assignee: DAICEL CORPORATION
    Inventors: Yasuyuki Akai, Youji Suzuki, Takeshi Yokoo
  • Publication number: 20190214580
    Abstract: Provided is a composition for manufacturing an organic semiconductor device, the composition enabling formation of an organic semiconductor device that stably shows high carrier mobility. A composition for manufacturing an organic semiconductor device contains 2,3-dihydrobenzofuran as a solvent and an organic semiconductor material below, in which the water content of the solvent is 0.25 wt % or less. The organic semiconductor material: at least one compound selected from the group consisting of a compound represented by formula (1-1), a compound represented by formula (1-2), a compound represented by formula (1-3), a compound represented by formula (1-4), a compound represented by formula (1-5), and a compound represented by formula (1-6).
    Type: Application
    Filed: May 17, 2017
    Publication date: July 11, 2019
    Applicant: DAICEL CORPORATION
    Inventors: Takeshi YOKOO, Youji SUZUKI, Yasuyuki AKAI
  • Patent number: 10336708
    Abstract: A novel imidazole compound that yields a surface treatment liquid that is very effective at suppressing migration and oxidation of a wiring surface; a metal surface treatment liquid that contains the imidazole compound; a metal surface treatment method that uses the metal surface treatment liquid; and a laminate production method that uses the surface treatment liquid. A metal is surface-treated using the surface treatment liquid which includes a saturated fatty acid or a saturated fatty acid ester of a specific structure, in which a prescribed position is substituted by an aromatic group of a prescribed structure and an imidazolyl group that may have a substituent group.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: July 2, 2019
    Assignee: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Tatsuro Ishikawa, Kunihiro Noda, Yasuhide Ohuchi, Hiroki Chisaka, Dai Shiota, Yukitsugu Maeda, Takafumi Imoto, Kouhei Fujita, Yasuyuki Akai
  • Publication number: 20190006603
    Abstract: There is provided a composition being excellent in the dissolvability of an organic semiconductor material and being capable of forming an organic semiconductor device having a high carrier mobility by using a printing method under a low-temperature environment. The composition for producing an organic semiconductor device according to the present invention comprises an organic semiconductor material and solvent (A). The organic semiconductor material is an N-shaped fused-ring n-conjugated molecule; and solvent (A) is a compound represented by formula (a). In the formula, L represents a single bond, —O—, —NH—C(?O)—NH—, —C(?O)—, or —C(?S)—; k represents an integer of 0 to 2; R1 represents a group selected from C1-20 alkyl, C2-20 alkenyl, C3-20 cycloalkyl, —ORa, —SRa, —O(C?O)Ra, —RbO(C?O)Ra or substituted or unsubstituted amino; and t represents an integer of 1 or more.
    Type: Application
    Filed: December 13, 2016
    Publication date: January 3, 2019
    Applicants: DAICEL CORPORATION, THE UNIVERSITY OF TOKYO
    Inventors: Youji SUZUKI, Takeshi YOKOO, Yasuyuki AKAI, Junichi TAKEYA
  • Patent number: 9902675
    Abstract: A novel vinyl-group-containing fluorene compound and a method for producing the same, a polymerizable monomer and cross-linking agent including this compound, a leaving-group-containing fluorene compound, a monovinyl-group-containing fluorene compound, and methods for producing the same. This vinyl-group-containing fluorene compound is represented by formula (1). In the formula, W1 and W2 represent a group represented by formula (2), a group represented by formula (4), a hydroxyl group, or a (meth)acryloyloxy group, R3a and R3b represent a cyano group, a halogen atom, or a monovalent hydrocarbon, and n1 and n2 are integers of 0-4. In formulas (2) and (4), a ring (Z) is an aromatic hydrocarbon ring, X is a single bond or a group represented by —S—, R1 is a single bond or a C1-4 alkylene group, R2 is a specific substituent group such as a monovalent hydrocarbon, and m is an integer of 0 or greater.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: February 27, 2018
    Assignees: TOKYO OHKA KOGYO CO., LTD., DAICEL CORPORATION
    Inventors: Dai Shiota, Kunihiro Noda, Hiroki Chisaka, Yasuyuki Akai, Ichiro Takase, Yoshiya Narasaki, Daisuke Tanida, Kyuhei Kitao
  • Publication number: 20180050973
    Abstract: A novel vinyl-group-containing fluorene compound and a method for producing the same, a polymerizable monomer and cross-linking agent including the compound, a leaving-group-containing fluorene compound, a monovinyl-group-containing fluorene compound, and methods for producing the same. The vinyl-group-containing fluorene compound is represented by formula (1) in which W1 and W2 represent a group represented by formula (2), a group represented by formula (4), a hydroxyl group, or a (meth)acryloyloxy group, R3a and R3b represent a cyano group, a halogen atom, or a monovalent hydrocarbon, and n1 and n2 are integers of 0-4. In formulas (2) and (4), (Z) is an aromatic hydrocarbon ring, X is a single bond or a group represented by —S—, R1 is a single bond or a C1-4 alkylene group, R2 is a substituent such as a monovalent hydrocarbon, and m is an integer of 0 or more).
    Type: Application
    Filed: November 1, 2017
    Publication date: February 22, 2018
    Inventors: Dai SHIOTA, Kunihiro NODA, Hiroki CHISAKA, Yasuyuki AKAI, Ichiro TAKASE, Yoshiya NARASAKI, Daisuke TANIDA, Kyuhei KITAO
  • Publication number: 20170271041
    Abstract: Provided is an insulating coating composition. The composition is highly safe, in which an organic material to form an insulating film is dissolved highly stably. The composition can form an insulating film by coating, where the insulating film has a low relative permittivity, a high insulation resistance, and high wettability and allows an upper layer to be formed thereon by coating. The insulating coating composition according to the present invention contains a cyclic olefin copolymer and a solvent. The cyclic olefin copolymer is a copolymer between a cyclic olefin and a chain olefin. The solvent includes a compound represented by Formula (1) and having a normal boiling point of 100° C. to lower than 300° C. In Formula (1), Ring Z is a ring selected from a 5- or 6-membered saturated or unsaturated cyclic hydrocarbon and a benzene ring; and R1 is selected from a hydrocarbon group and acyl. Ring Z has a substituent or substituents including the R1O group.
    Type: Application
    Filed: August 25, 2015
    Publication date: September 21, 2017
    Applicant: DAICEL CORPORATION
    Inventors: Yasuyuki AKAI, Youji SUZUKI, Takeshi YOKOO
  • Publication number: 20170247334
    Abstract: A novel imidazole compound that yields a surface treatment liquid that is very effective at suppressing migration and oxidation of a wiring surface; a metal surface treatment liquid that contains the imidazole compound; a metal surface treatment method that uses the metal surface treatment liquid; and a laminate production method that uses the surface treatment liquid. A metal is surface-treated using the surface treatment liquid which includes a saturated fatty acid or a saturated fatty acid ester of a specific structure, in which a prescribed position is substituted by an aromatic group of a prescribed structure and an imidazolyl group that may have a substituent group.
    Type: Application
    Filed: August 27, 2015
    Publication date: August 31, 2017
    Inventors: Tatsuro ISHIKAWA, Kunihiro NODA, Yasuhide OHUCHI, Hiroki CHISAKA, Dai SHIOTA, Yukitsugu MAEDA, Takafumi IMOTO, Kouhei FUJITA, Yasuyuki AKAI