Patents by Inventor Ryoichi Takasu

Ryoichi Takasu 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).

  • Publication number: 20240123229
    Abstract: Provided is an electrostimulation device that outputs an electrical signal, the electrical signal obtained by repeatedly outputting a fifth electrical signal comprising a first electrical signal whose amplitude in a first time becomes larger from a first amplitude, a second electrical signal whose amplitude in a second time is maintained to a second amplitude, a third electrical signal whose amplitude in a third time becomes smaller to a third amplitude, and a fourth electrical signal whose amplitude in a fourth time is maintained to a fourth amplitude; and the first electrical signal output in a sixth time, that is obtained by repeatedly outputting an eighth electrical signal comprising a sixth electrical signal having a first frequency, the sixth electrical signal that is off in a seventh time, wherein the first frequency is controlled via first frequency control of changing from a second frequency to a third frequency.
    Type: Application
    Filed: February 16, 2022
    Publication date: April 18, 2024
    Applicant: ITO CO., LTD.
    Inventors: Daigo YOSHIDA, Ryoichi TAKASU, Wataru ORITO, Osamu ITO, Hideki ARAI
  • Patent number: 8198004
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: June 12, 2012
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Patent number: 7989138
    Abstract: A fluorine-containing compound represented by a general formula (c-1) shown below: [Chemical Formula 1] RX-AN-(OR2)a??(c-1) [wherein, RX represents an organic group, AN represents a naphthalene ring that may have a substituent, R2 represents a base dissociable group, and a represents 1 or 2, provided that at least one among AN and said a R2 groups contains a fluorine atom].
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: August 2, 2011
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Sanae Furuya, Takahiro Dazai, Takayoshi Mori, Ryoichi Takasu, Tomoyuki Hirano
  • Patent number: 7914967
    Abstract: A resist composition for immersion exposure including a base component (A) which exhibits changed solubility in an alkali developing solution under action of acid, an acid-generator component (B) which generates acid upon irradiation, and a fluorine-containing compound (C) having a group represented by general formula (c) shown below and containing at least one fluorine atom: wherein Q represents a group in which one hydrogen atom has been removed from a monovalent hydrophilic group; and R1 represents a hydrocarbon group of 2 or more carbon atoms which may have a fluorine atom.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: March 29, 2011
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Sanae Furuya, Takayoshi Mori, Takahiro Dazai, Ryoichi Takasu, Tomoyuki Hirano
  • Patent number: 7914968
    Abstract: A positive resist composition including a resin component (A) and an acid-generator component (B), the resin component (A) including a structural unit (a1) derived from hydroxystyrene, and a structural unit (a2) having an acetal-type acid dissociable dissolution inhibiting group, and the acid-generator component (B) including an acid generator (B1-i) having at least one anion moiety selected from the group consisting of anion moieties represented by general formula (b-3), (b-4), and (b-5), an acid generator (B1-ii) having an anion moiety represented by general formula (b-6) shown below, or an acid generator (B1-iii) having a cation moiety represented by general formula (b?-3) shown below: wherein X? represents an alkylene group of 2 to 6 carbon atoms in which at least one hydrogen atom has been substituted with a fluorine atom; Y? and Z?, U?, V?, and W? each independently represents an alkyl group of 1 to 10 carbon atoms in which at least one hydrogen atom has been substituted with a fluorine atom, [Chem
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: March 29, 2011
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Takeyoshi Mimura, Akiya Kawaue, Ryoichi Takasu
  • Publication number: 20100304289
    Abstract: A positive resist composition including a resin component (A) and an acid-generator component (B), the resin component (A) including a structural unit (a1) derived from hydroxystyrene, and a structural unit (a2) having an acetal-type acid dissociable dissolution inhibiting group, and the acid-generator component (B) including an acid generator (B1-i) having at least one anion moiety selected from the group consisting of anion moieties represented by general formula (b-3), (b-4), and (b-5), an acid generator (B1-ii) having an anion moiety represented by general formula (b-6) shown below, or an acid generator (B1-iii) having a cation moiety represented by general formula (b?-3) shown below: wherein X? represents an alkylene group of 2 to 6 carbon atoms in which at least one hydrogen atom has been substituted with a fluorine atom; Y? and Z?, U?, V?, and W? each independently represents an alkyl group of 1 to 10 carbon atoms in which at least one hydrogen atom has been substituted with a fluorine atom, [Che
    Type: Application
    Filed: June 8, 2007
    Publication date: December 2, 2010
    Applicant: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Takeyoshi Mimura, Akiya Kawaue, Ryoichi Takasu
  • Publication number: 20090142699
    Abstract: A fluorine-containing compound represented by a general formula (c-1) shown below: RX-AN-(OR2)a ??[Chemical Formula 1] (c-1) [wherein, RX represents an organic group, AN represents a naphthalene ring that may have a substituent, R2 represents a base dissociable group, and a represents 1 or 2, provided that at least one among AN and said a R2 groups contains a fluorine atom].
    Type: Application
    Filed: November 25, 2008
    Publication date: June 4, 2009
    Applicant: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Sanae Furuya, Takahiro Dazai, Takayoshi Mori, Ryoichi Takasu, Tomoyuki Hirano
  • Patent number: 7541138
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: June 2, 2009
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Publication number: 20090130605
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Application
    Filed: October 15, 2008
    Publication date: May 21, 2009
    Applicant: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Patent number: 7527909
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: May 5, 2009
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Patent number: 7501220
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: March 10, 2009
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Publication number: 20090047602
    Abstract: A resist composition for immersion exposure including a base component (A) which exhibits changed solubility in an alkali developing solution under action of acid, an acid-generator component (B) which generates acid upon irradiation, and a fluorine-containing compound (C) having a group represented by general formula (c) shown below and containing at least one fluorine atom: wherein Q represents a group in which one hydrogen atom has been removed from a monovalent hydrophilic group; and R1 represents a hydrocarbon group of 2 or more carbon atoms which may have a fluorine atom.
    Type: Application
    Filed: August 1, 2008
    Publication date: February 19, 2009
    Applicant: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Sanae Furuya, Takayoshi Mori, Takahiro Dazai, Ryoichi Takasu, Tomoyuki Hirano
  • Patent number: 7371510
    Abstract: Provided are a material for forming a resist protecting film which is for use in a liquid immersion lithography process and which is formed on a resist film, wherein the material has the following properties of: being transparent with respect to exposure light; having substantially no compatibility with a liquid for liquid immersion lithography; and causing no mixing with the resist film, a composite film comprising a protective film formed from the material and a resist film, and a method for forming a resist pattern using them. These can prevent both the resist film and the liquid used from changing in properties during the liquid immersion lithography, so that a resist pattern with high resolution can be formed using the liquid immersion lithography.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: May 13, 2008
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Ryoichi Takasu, Mitsuru Sato, Kazumasa Wakiya, Masaaki Yoshida, Koki Tamura
  • Patent number: 7326512
    Abstract: Provided are a polymer compound having high transparency for use in a photoresist composition for microfabrication of the next generation, a resist composition using the polymer compound as a base polymer, and a dissolution inhibitor agent composed of the polymer compound. To ensure etching resistance, an alicyclic group is introduced into a side chain portion. Hydrogen atoms on the ring of the alicyclic group are highly fluorinated to ensure transparency to light of 157 nanometer wavelength, represented by an adsorption coefficient equal to or less than 3.0 ?m?1. As the alicyclic group, a polycyclic group is preferably used. Hydrogen atoms are highly fluorinated by preferably substituting all hydrogen atoms on the ring by fluorine atoms, that is, forming a perfluoroalicyclic group. The resist composition is formed by using the polymer compound as a base polymer and further, the dissolution inhibitor agent is formed of the polymer compound.
    Type: Grant
    Filed: November 28, 2003
    Date of Patent: February 5, 2008
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Toshiyuki Ogata, Kotaro Endo, Hiromitsu Tsuji, Masaaki Yoshida, Hideo Hada, Ryoichi Takasu, Mitsuru Sato
  • Publication number: 20070190436
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Application
    Filed: January 10, 2007
    Publication date: August 16, 2007
    Applicant: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Publication number: 20070178394
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Application
    Filed: January 10, 2007
    Publication date: August 2, 2007
    Applicant: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Publication number: 20070134593
    Abstract: Provided are a material for forming a resist protecting film which is for use in a liquid immersion lithography process and which is formed on a resist film, wherein the material has the following properties of: being transparent with respect to exposure light; having substantially no compatibility with a liquid for liquid immersion lithography; and causing no mixing with the resist film, a composite film comprising a protective film formed from the material and a resist film, and a method for forming a resist pattern using them. These can prevent both the resist film and the liquid used from changing in properties during the liquid immersion lithography, so that a resist pattern with high resolution can be formed using the liquid immersion lithography.
    Type: Application
    Filed: February 6, 2007
    Publication date: June 14, 2007
    Inventors: Taku Hirayama, Ryoichi Takasu, Mitsuru Sato, Kazumasa Wakiya, Masaaki Yoshida, Koki Tamura
  • Publication number: 20060141400
    Abstract: Provided are a material for forming a resist protecting film which is for use in a liquid immersion lithography process and which is formed on a resist film, wherein the material has the following properties of: being transparent with respect to exposure light; having substantially no compatibility with a liquid for liquid immersion lithography; and causing no mixing with the resist film, a composite film comprising a protective film formed from the material and a resist film, and a method for forming a resist pattern using them. These can prevent both the resist film and the liquid used from changing in properties during the liquid immersion lithography, so that a resist pattern with high resolution can be formed using the liquid immersion lithography.
    Type: Application
    Filed: February 20, 2004
    Publication date: June 29, 2006
    Inventors: Taku Hirayama, Ryoichi Takasu, Mitsuru Sato, Kazumasa Wakiya, Masaaki Yoshida, Koki Tamura
  • Patent number: 6936400
    Abstract: A negative resist composition is provided which is less likely to swell in an alkali developing solution. An alkali-developable negative resist composition is disclosed comprising a compound (A) which generates an acid upon exposure to radiation, and a resin component (B) which becomes insoluble in alkali under the action of an acid, wherein the component (B) is a resin component containing: (b1) a unit which becomes insoluble in an alkali solution as a result of the formation of a lactone under the action of an acid generated from the component (A), and (b2) a unit having an alcoholic hydroxyl group.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: August 30, 2005
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Ryoichi Takasu, Miwa Miyairi, Jun Iwashita, Toshikazu Tachikawa
  • Publication number: 20050130056
    Abstract: Provided are a polymer compound having high transparency for use in a photoresist composition for microfabrication of the next generation, a resist composition using the polymer compound as a base polymer, and a dissolution inhibitor agent composed of the polymer compound. To ensure etching resistance, an alicyclic group is introduced into a side chain portion. Hydrogen atoms on the ring of the alicyclic group are highly fluorinated to ensure transparency to light of 157 nanometer wavelength, represented by an adsorption coefficient equal to or less than 3.0 ?m?1. As the alicyclic group, a polycyclic group is preferably used. Hydrogen atoms are highly fluorinated by preferably substituting all hydrogen atoms on the ring by fluorine atoms, that is, forming a perfluoroalicyclic group. The resist composition is formed by using the polymer compound as a base polymer and further, the dissolution inhibitor agent is formed of the polymer compound.
    Type: Application
    Filed: November 28, 2003
    Publication date: June 16, 2005
    Inventors: Toshiyuki Ogata, Kotaro Endo, Hiromitsu Tsuji, Masaaki Yoshida, Hideo Hada, Ryoichi Takasu, Mitsuru Sato