Patents by Inventor Koji KAGAWA

Koji KAGAWA 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: 20250132164
    Abstract: A technique enabling wet etching of a first silicon oxide film with high selectivity with respect to a metal film and a second silicon oxide film is provided. A substrate processing method of wet-etching a substrate having a stacked structure including a metal film, a first silicon oxide film, and a second silicon oxide film having a moisture content lower than that of the first silicon oxide film is provided. The substrate processing method includes performing an etching while increasing etching selectivity of the first silicon oxide film with respect to the second silicon oxide film and the metal film by supplying an etching liquid, which is prepared by diluting sulfuric acid, hydrogen peroxide and hydrofluoric acid in an anhydrous organic solvent, to the substrate such that the metal film, the first silicon oxide film, and the second silicon oxide film are simultaneously exposed to the etching liquid.
    Type: Application
    Filed: August 15, 2022
    Publication date: April 24, 2025
    Inventor: Koji Kagawa
  • Patent number: 12203021
    Abstract: A substrate processing method includes holding a substrate; and supplying an etching liquid to the substrate held in the holding of the substrate. The etching liquid contains an etching agent configured to etch a metal-based first material and a silicon-based second material exposed on the substrate and a protection agent configured to react with the second material between the first material and the second material to form a protection layer on a surface of the second material. Here, the etching agent is a liquid which contains fluorine atoms and an organic solvent and substantially does not contain water, and the protection layer protects the second material from etching with the etching agent.
    Type: Grant
    Filed: March 14, 2022
    Date of Patent: January 21, 2025
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Koukichi Hiroshiro, Tetsuya Sakazaki, Koji Kagawa, Kenji Sekiguchi, Kazuyoshi Mizumoto
  • Publication number: 20240307821
    Abstract: A substrate processing system includes a batch processor, a single-substrate processor, and a transferrer. The batch processor collectively processes a plurality of substrates by immersing the plurality of substrates in ozonated water stored in a processing tank. The single-substrate processor processes the plurality of substrates one by one with a chemical liquid. The transferrer transfers the plurality of substrates in a wet state from the batch processor to the single-substrate processor.
    Type: Application
    Filed: June 22, 2022
    Publication date: September 19, 2024
    Inventors: Yosuke HACHIYA, Mitsunori NAKAMORI, Koji KAGAWA
  • Publication number: 20240222157
    Abstract: A substrate processing method includes holding a substrate on which a boron-containing silicon film is formed; supplying an oxidative aqueous solution including hydrofluoric acid and nitric acid to the held substrate; and etching the boron-containing silicon film of the substrate with the oxidative aqueous solution.
    Type: Application
    Filed: March 18, 2024
    Publication date: July 4, 2024
    Inventors: Song yun Kang, Toshitake Tsuda, Kenji Sekiguchi, Syuhei Yonezawa, Koji Kagawa
  • Patent number: 12020943
    Abstract: A substrate processing method includes: a preparing process of preparing a substrate in which a zirconium oxide film as a mask has been formed on a laminated film and dry-etched into a given shape; after the preparing process, a mask removing process of removing the zirconium oxide film by supplying a mask removing liquid containing sulfuric acid as a main component to the substrate; and after the mask removing process, a drying process of drying a surface of the substrate that is wet with a rinsing liquid.
    Type: Grant
    Filed: March 9, 2022
    Date of Patent: June 25, 2024
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Atsushi Yamashita, Koji Kagawa
  • Publication number: 20240128307
    Abstract: A substrate processing method includes: (A) preparing a substrate, on which a high-dielectric film having a higher permittivity than a SiO2 film is formed; (B) supplying, to the substrate, a metal solution containing a second metal element having a higher electronegativity or a lower valence than a first metal element contained in the high-dielectric film; and (C) forming a doping layer, in which the first metal element is substituted with the second metal element, on a surface of the high-dielectric film.
    Type: Application
    Filed: January 31, 2022
    Publication date: April 18, 2024
    Inventors: Rintaro HIGUCHI, Mitsunori NAKAMORI, Koji KAGAWA, Kenji SEKIGUCHI, Hajime NAKABAYASHI, Syuhei YONEZAWA
  • Patent number: 11875991
    Abstract: A substrate treatment method according to an embodiment of the present disclosure includes a temperature raising step of raising a temperature of a concentrated sulfuric acid, and a liquid supply step of supplying the concentrated sulfuric acid having the raised temperature to a substrate placed on a substrate processing part.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: January 16, 2024
    Assignee: TOKYO ELECTRON LIMITED
    Inventor: Koji Kagawa
  • Publication number: 20230386855
    Abstract: A substrate processing method includes (A) to (C) described below. (A) A substrate having a surface in which a SiO film and a Low-k film or a SiN film are exposed is preprared. The Low-k film or the SiN film is exposed to oxygen plasma. (B) A protective film is formed on the Low-k film or the SiN film by supplying an organic compound (self-assembled monolayer (SAM) material) configured to form a SAM to the surface of the substrate. (C) The SiO film is etched by supplying hydrofluoric acid to the surface of the substrate while inhibiting etching of the Low-k film or the SiN film caused by the hydrofluoric acid with the protective film.
    Type: Application
    Filed: October 6, 2021
    Publication date: November 30, 2023
    Inventors: Koji Kagawa, Koukichi Hiroshiro
  • Patent number: 11626294
    Abstract: A substrate processing method includes etching a substrate having a first film and a second film at a first etching rate; changing an etching rate from the first etching rate to a second etching rate; and etching the substrate at the second etching rate.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: April 11, 2023
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Takumi Honda, Koji Kagawa
  • Patent number: 11551931
    Abstract: A substrate processing method includes (A) supplying to the substrate a first processing liquid containing a removing agent for deposit, a solvent having a boiling point lower than that of the removing agent and a thickener, (B), after (A), supplying to the substrate a second processing liquid containing an organic polymer to be a gas diffusion barrier film, (C), after (B), heating the substrate at a predetermined temperature equal to or higher than the boiling point of the solvent and lower than the boiling point of the removing agent to promote evaporation of the solvent and reaction between the deposit and the removing agent, and (D), after (C), supplying a rinsing liquid to the substrate to remove the deposit from the substrate. The gas diffusion barrier film prevents a gaseous reactive product generated by the reaction in (C) from diffusing around the substrate.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: January 10, 2023
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Koji Kagawa, Takayuki Toshima
  • Patent number: 11551941
    Abstract: A substrate cleaning apparatus includes a first processing unit configured to supply a first processing liquid for removing a residue adhering to a substrate onto the substrate on which a metal film is exposed at a recess of a pattern; a second processing unit configured to supply, onto the substrate, a second processing liquid for forming a protective film insoluble to the first processing liquid; a third processing unit configured to supply, onto the substrate, a third processing liquid for dissolving the protective film; and a control unit. The control unit performs forming the protective film on the metal film in a state that an upper portion of the pattern is exposed from the protective film; removing the residue adhering to the upper portion of the pattern after the forming of the protective film; and removing the protective film from the substrate after the removing of the residue.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: January 10, 2023
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Koji Kagawa, Meitoku Aibara
  • Publication number: 20220316059
    Abstract: A substrate processing method includes a protective film forming step, an insulating material depositing step, a protective film removing step, and a metal material depositing step. In the protective film forming step, a protective film is formed on a metal film among the metal film and an insulating film exposed on the surface of a substrate, using a film-forming material that is selectively adsorbed onto the metal film. In the insulating material depositing step, after the protective film forming step, an insulating material is deposited on the surface of the insulating film using an atomic layer deposition method. In the protective film removing step, the protective film is removed from the surface of the metal film after the insulating material depositing step. In the metal material depositing step, a metal material is deposited on the metal film after the protective film removing step.
    Type: Application
    Filed: July 13, 2020
    Publication date: October 6, 2022
    Inventors: Koukichi HIROSHIRO, Makoto MURAMATSU, Koji KAGAWA, Kenji SEKIGUCHI
  • Publication number: 20220301880
    Abstract: A substrate processing method includes: a preparing process of preparing a substrate in which a zirconium oxide film as a mask has been formed on a laminated film and dry-etched into a given shape; after the preparing process, a mask removing process of removing the zirconium oxide film by supplying a mask removing liquid containing sulfuric acid as a main component to the substrate; and after the mask removing process, a drying process of drying a surface of the substrate that is wet with a rinsing liquid.
    Type: Application
    Filed: March 9, 2022
    Publication date: September 22, 2022
    Inventors: Atsushi YAMASHITA, Koji KAGAWA
  • Publication number: 20220213382
    Abstract: A substrate processing method includes holding a substrate; and supplying an etching liquid to the substrate held in the holding of the substrate. The etching liquid contains an etching agent configured to etch a metal-based first material and a silicon-based second material exposed on the substrate and a protection agent configured to react with the second material between the first material and the second material to form a protection layer on a surface of the second material. Here, the etching agent is a liquid which contains fluorine atoms and an organic solvent and substantially does not contain water, and the protection layer protects the second material from etching with the etching agent.
    Type: Application
    Filed: March 14, 2022
    Publication date: July 7, 2022
    Inventors: Koukichi Hiroshiro, Tetsuya Sakazaki, Koji Kagawa, Kenji Sekiguchi, Kazuyoshi Mizumoto
  • Patent number: 11306249
    Abstract: A substrate processing method includes holding a substrate; and supplying an etching liquid to the substrate held in the holding of the substrate. The etching liquid contains an etching agent configured to etch a metal-based first material and a silicon-based second material exposed on the substrate and a protection agent configured to react with the second material between the first material and the second material to form a protection layer on a surface of the second material. Here, the etching agent is a liquid which contains fluorine atoms and an organic solvent and substantially does not contain water, and the protection layer protects the second material from etching with the etching agent.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: April 19, 2022
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Koukichi Hiroshiro, Tetsuya Sakazaki, Koji Kagawa, Kenji Sekiguchi, Kazuyoshi Mizumoto
  • Publication number: 20220068642
    Abstract: A substrate processing method for crystallizing and expanding a silicon film by a thermal treatment, the method including: a holding process including holding, before executing the thermal treatment, a substrate on which the silicon film is formed; and an adhesion process including supplying, to the substrate that is held in the holding process, a solution containing metal to cause the metal to adhere to a surface of the silicon film with an adhesion amount within a range equal to or more than 1.0E10 [atoms/cm2] and equal to or less than 1.0E20 [atoms/cm2].
    Type: Application
    Filed: August 25, 2021
    Publication date: March 3, 2022
    Applicant: Tokyo Electron Limited
    Inventors: Koji KAGAWA, Kenji SEKIGUCHI, Syuhei YONEZAWA, Daisuke SUZUKI, Yoshihiro TAKEZAWA, Yoshihisa MATSUBARA
  • Publication number: 20210305066
    Abstract: A substrate processing method includes holding a substrate on which a boron-containing silicon film is formed; supplying an oxidative aqueous solution including hydrofluoric acid and nitric acid to the held substrate; and etching the boron-containing silicon film of the substrate with the oxidative aqueous solution.
    Type: Application
    Filed: March 25, 2021
    Publication date: September 30, 2021
    Inventors: Song yun Kang, Toshitake Tsuda, Kenji Sekiguchi, Syuhei Yonezawa, Koji Kagawa
  • Publication number: 20210257209
    Abstract: A substrate treatment method according to an embodiment of the present disclosure includes a temperature raising step of raising a temperature of a concentrated sulfuric acid, and a liquid supply step of supplying the concentrated sulfuric acid having the raised temperature to a substrate placed on a substrate processing part.
    Type: Application
    Filed: June 4, 2019
    Publication date: August 19, 2021
    Inventor: Koji KAGAWA
  • Publication number: 20210217620
    Abstract: A substrate processing method includes (A) supplying to the substrate a first processing liquid containing a removing agent for deposit, a solvent having a boiling point lower than that of the removing agent and a thickener, (B), after (A), supplying to the substrate a second processing liquid containing an organic polymer to be a gas diffusion barrier film, (C), after (B), heating the substrate at a predetermined temperature equal to or higher than the boiling point of the solvent and lower than the boiling point of the removing agent to promote evaporation of the solvent and reaction between the deposit and the removing agent, and (D), after (C), supplying a rinsing liquid to the substrate to remove the deposit from the substrate. The gas diffusion barrier film prevents a gaseous reactive product generated by the reaction in (C) from diffusing around the substrate.
    Type: Application
    Filed: December 7, 2018
    Publication date: July 15, 2021
    Inventors: Koji KAGAWA, Takayuki TOSHIMA
  • Patent number: 11049723
    Abstract: A substrate processing method includes: maintaining an atmosphere in contact with at least a surface of a substrate on which a first material that is a metal and a second material that is a material other than the first material are exposed, as a deoxidized atmosphere; supplying a film forming material, which selectively forms a film on the first material among the first material and the second material, to the surface of the substrate in a state where the deoxidized atmosphere is maintained by the maintaining; performing a surface treatment of the second material in a state where the film is formed on a surface of the first material supplied in the supplying the film forming material; and removing the film from the surface of the first material after the performing the surface treatment.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: June 29, 2021
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Koukichi Hiroshiro, Rintaro Higuchi, Koji Kagawa, Kenji Sekiguchi