Patents by Inventor Toshiaki Akutsu

Toshiaki Akutsu 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: 11046869
    Abstract: A polishing liquid comprising a liquid medium, an abrasive grain and a polymer, wherein the polymer includes a first molecular chain having a functional group directly bonded thereto, and a second molecular chain branched from the first molecular chain, and the functional group is at least one selected from the group consisting of a carboxyl group, a carboxylic acid salt group, a hydroxyl group, a sulfo group and a sulfonic acid salt group.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: June 29, 2021
    Assignee: SHOWA DENKO MATERIALS CO., LTD.
    Inventors: Toshiaki Akutsu, Hisataka Minami, Tomohiro Iwano, Tetsuro Yamashita, Masako Aoki, Masato Fukasawa
  • Patent number: 10759968
    Abstract: A polishing agent comprises: a fluid medium; an abrasive grain containing a hydroxide of a tetravalent metal element; a first additive; a second additive; and a third additive, wherein: the first additive is at least one selected from the group consisting of a compound having a polyoxyalkylene chain and a vinyl alcohol polymer; the second additive is a cationic polymer; and the third additive is an amino group-containing sulfonic acid compound.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: September 1, 2020
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Hisataka Minami, Tomohiro Iwano, Toshiaki Akutsu
  • Patent number: 10557058
    Abstract: The polishing agent of the invention comprises water, an abrasive grain containing a hydroxide of a tetravalent metal element, polyalkylene glycol, and at least one cationic polymer selected from the group consisting of allylamine polymers, diallylamine polymers, vinylamine polymers and ethyleneimine polymers.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: February 11, 2020
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Toshiaki Akutsu, Hisataka Minami, Tomohiro Iwano, Koji Fujisaki
  • Patent number: 10557059
    Abstract: A polishing liquid comprising an abrasive grain, an additive, and water, wherein the abrasive grain includes a hydroxide of a tetravalent metal element, produces absorbance of 1.00 or more and less than 1.50 for light having a wavelength of 400 nm in an aqueous dispersion having a content of the abrasive grain adjusted to 1.0 mass %, and produces absorbance of 0.035 or more for light having a wavelength of 400 nm in a liquid phase obtained when centrifuging an aqueous dispersion having a content of the abrasive grain adjusted to 1.0 mass % for 50 minutes at a centrifugal acceleration of 1.59×105 G.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: February 11, 2020
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Tomohiro Iwano, Hisataka Minami, Toshiaki Akutsu, Koji Fujisaki
  • Patent number: 10549399
    Abstract: A polishing liquid comprising an abrasive grain, an additive, and water, wherein the abrasive grain includes a hydroxide of a tetravalent metal element, and produces absorbance of 1.00 or more and less than 1.50 for light having a wavelength of 400 nm in an aqueous dispersion having a content of the abrasive grain adjusted to 1.0 mass %.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: February 4, 2020
    Assignee: HITACHI CHEMCIAL COMPANY, LTD.
    Inventors: Tomohiro Iwano, Hisataka Minami, Toshiaki Akutsu, Koji Fujisaki
  • Patent number: 10196542
    Abstract: The polishing agent of the invention comprises water, an abrasive grain containing a hydroxide of a tetravalent metal element, and a specific glycerin compound.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: February 5, 2019
    Assignee: HITACHI CHEMICAL COMPANY, LTD
    Inventors: Hisataka Minami, Toshiaki Akutsu, Tomohiro Iwano, Koji Fujisaki
  • Patent number: 10155886
    Abstract: A polishing liquid for CMP, comprising: an abrasive grain including a cerium-based compound; a 4-pyrone-based compound; a polymer compound having an aromatic ring and a polyoxyalkylene chain; a cationic polymer; and water.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: December 18, 2018
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Munehiro Oota, Toshio Takizawa, Hisataka Minami, Toshiaki Akutsu, Tomohiro Iwano
  • Publication number: 20180320024
    Abstract: A polishing agent comprises: a fluid medium; an abrasive grain containing a hydroxide of a tetravalent metal element; a first additive; a second additive; and a third additive, wherein: the first additive is at least one selected from the group consisting of a compound having a polyoxyalkylene chain and a vinyl alcohol polymer; the second additive is a cationic polymer; and the third additive is an amino group-containing sulfonic acid compound.
    Type: Application
    Filed: June 26, 2018
    Publication date: November 8, 2018
    Inventors: Hisataka MINAMI, Tomohiro IWANO, Toshiaki AKUTSU
  • Publication number: 20180258319
    Abstract: A polishing liquid comprising a liquid medium, an abrasive grain and a polymer, wherein the polymer includes a first molecular chain having a functional group directly bonded thereto, and a second molecular chain branched from the first molecular chain, and the functional group is at least one selected from the group consisting of a carboxyl group, a carboxylic acid salt group, a hydroxyl group, a sulfo group and a sulfonic acid salt group.
    Type: Application
    Filed: June 13, 2016
    Publication date: September 13, 2018
    Inventors: Toshiaki AKUTSU, Hisataka MINAMI, Tomohiro IWANO, Tetsuro YAMASHITA, Masako AOKI, Masato FUKASAWA
  • Patent number: 10030172
    Abstract: A polishing agent comprises: a fluid medium; an abrasive grain containing a hydroxide of a tetravalent metal element; a first additive; a second additive; and a third additive, wherein: the first additive is at least one selected from the group consisting of a compound having a polyoxyalkylene chain and a vinyl alcohol polymer; the second additive is a cationic polymer; and the third additive is an amino group-containing sulfonic acid compound.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: July 24, 2018
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Hisataka Minami, Tomohiro Iwano, Toshiaki Akutsu
  • Patent number: 9932497
    Abstract: A polishing liquid comprising an abrasive grain, an additive, and water, wherein the abrasive grain includes a hydroxide of a tetravalent metal element, produces absorbance of 1.00 or more and less than 1.50 for light having a wavelength of 400 nm in an aqueous dispersion having a content of the abrasive grain adjusted to 1.0 mass %, and produces a liquid phase having a content of a non-volatile component of 300 ppm or more when centrifuging an aqueous dispersion having a content of the abrasive grain adjusted to 1.0 mass % for 50 minutes at a centrifugal acceleration of 1.59×105 G.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: April 3, 2018
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Tomohiro Iwano, Hisataka Minami, Toshiaki Akutsu, Koji Fujisaki
  • Publication number: 20160319159
    Abstract: A polishing agent comprises: a fluid medium; an abrasive grain containing a hydroxide of a tetravalent metal element; a first additive; a second additive; and a third additive, wherein: the first additive is at least one selected from the group consisting of a compound having a polyoxyalkylene chain and a vinyl alcohol polymer; the second additive is a cationic polymer; and the third additive is an amino group-containing sulfonic acid compound.
    Type: Application
    Filed: September 10, 2014
    Publication date: November 3, 2016
    Inventors: Hisataka MINAMI, Tomohiro IWANO, Toshiaki AKUTSU
  • Patent number: 9346977
    Abstract: The polishing agent of the invention comprises water, an abrasive grain containing a hydroxide of a tetravalent metal element, and a specific glycerin compound.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: May 24, 2016
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Hisataka Minami, Toshiaki Akutsu, Tomohiro Iwano, Koji Fujisaki
  • Patent number: 9346978
    Abstract: A polishing liquid comprising an abrasive grain, an additive, and water, wherein the abrasive grain includes a hydroxide of a tetravalent metal element, produces absorbance of 1.00 or more for light having a wavelength of 400 nm in an aqueous dispersion having a content of the abrasive grain adjusted to 1.0 mass %, and produces light transmittance of 50%/cm or more for light having a wavelength of 500 nm in an aqueous dispersion having a content of the abrasive grain adjusted to 1.0 mass %, and a difference between a NO3? concentration of an aqueous dispersion having a content of the abrasive grain adjusted to 1.0 mass % and a NO3? concentration after retaining the aqueous dispersion at 60° C. for 72 hours is 200 ppm or less.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: May 24, 2016
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Tomohiro Iwano, Hisataka Minami, Toshiaki Akutsu, Koji Fujisaki
  • Publication number: 20160137881
    Abstract: A polishing liquid for CMP, comprising: an abrasive grain including a cerium-based compound; a 4-pyrone-based compound; a polymer compound having an aromatic ring and a polyoxyalkylene chain; a cationic polymer; and water.
    Type: Application
    Filed: April 28, 2014
    Publication date: May 19, 2016
    Inventors: Munehiro OOTA, Toshio TAKIZAWA, Hisataka MINAMI, Toshiaki AKUTSU, Tomohiro IWANO
  • Patent number: 9293344
    Abstract: The present invention relates to a CMP polishing slurry comprising cerium oxide particles, a dispersant, a water-soluble polymer and water, wherein the water-soluble polymer is a polymer obtained in polymerization of a monomer containing at least one of a carboxylic acid having an unsaturated double bond and the salt thereof by using at least one of a cationic azo compound and the salt thereof as a polymerization initiator. The present invention provides a polishing slurry and a polishing method allowing polishing efficiently uniformly at high speed without scratch and also allowing easy process management in the CMP technology of smoothening an interlayer dielectric film, BPSG film, and insulation film for shallow trench isolation.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: March 22, 2016
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Masato Fukasawa, Naoyuki Koyama, Yasushi Kurata, Kouji Haga, Toshiaki Akutsu, Yuuto Ootsuki
  • Publication number: 20160040041
    Abstract: The polishing agent of the invention comprises water, an abrasive grain containing a hydroxide of a tetravalent metal element, and a specific glycerin compound.
    Type: Application
    Filed: October 21, 2015
    Publication date: February 11, 2016
    Inventors: Hisataka MINAMI, Toshiaki AKUTSU, Tomohiro IWANO, Koji FUJISAKI
  • Patent number: 9163162
    Abstract: A polishing agent according to one embodiment of the present invention contains a liquid medium, an abrasive grain including a hydroxide of a tetravalent metal element, a polymer compound having an aromatic ring and a polyoxyalkylene chain, and a cationic polymer, wherein a weight average molecular weight of the polymer compound is 1000 or more.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: October 20, 2015
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Toshiaki Akutsu, Hisataka Minami, Tomohiro Iwano, Koji Fujisaki
  • Publication number: 20150232704
    Abstract: A polishing agent according to one embodiment of the present invention contains a liquid medium, an abrasive grain including a hydroxide of a tetravalent metal element, a polymer compound having an aromatic ring and a polyoxyalkylene chain, and a cationic polymer, wherein a weight average molecular weight of the polymer compound is 1000 or more.
    Type: Application
    Filed: July 30, 2013
    Publication date: August 20, 2015
    Inventors: Toshiaki Akutsu, Hisataka Minami, Tomohiro Iwano, Koji Fujisaki
  • Publication number: 20150140904
    Abstract: A polishing liquid comprising an abrasive grain, an additive, and water, wherein the abrasive grain includes a hydroxide of a tetravalent metal element, produces absorbance of 1.00 or more and less than 1.50 for light having a wavelength of 400 nm in an aqueous dispersion having a content of the abrasive grain adjusted to 1.0 mass %, and produces a liquid phase having a content of a non-volatile component of 300 ppm or more when centrifuging an aqueous dispersion having a content of the abrasive grain adjusted to 1.0 mass % for 50 minutes at a centrifugal acceleration of 1.59×105 G.
    Type: Application
    Filed: March 26, 2013
    Publication date: May 21, 2015
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Tomohiro Iwano, Hisataka Minami, Toshiaki Akutsu, Koji Fujisaki