Patents by Inventor Kazuhiro Hamamoto

Kazuhiro Hamamoto 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: 12025911
    Abstract: A substrate with a multilayer reflective film, a reflective mask blank, a reflective mask and a method of manufacturing a semiconductor device that can prevent contamination of the surface of the multilayer reflective film even in the case of having formed reference marks on the multilayer reflective film. A substrate with a multilayer reflective film contains a substrate and a multilayer reflective film that reflects EUV light formed on the substrate. Reference marks are formed to a concave shape on the surface of the substrate with the multilayer reflective film. The reference marks have grooves or protrusions roughly in the center. The shape of the grooves or protrusions when viewed from overhead is similar or roughly similar to the shape of the reference marks.
    Type: Grant
    Filed: May 2, 2023
    Date of Patent: July 2, 2024
    Assignee: HOYA CORPORATION
    Inventors: Kazuhiro Hamamoto, Tsutomu Shoki
  • Patent number: 11899356
    Abstract: A reflective film coated substrate includes a substrate having two main surfaces opposite to each other and end faces connected to outer edges of the two main surfaces; and a reflective film formed on one of the main surfaces and extending onto at least part of the end faces. The reflective film on the main surface has a multilayer structure including low refractive index layers and high refractive index layers alternately formed. The reflective film which extends onto the end faces has a single-layer structure containing a first element higher in content than any other element in the low refractive index layers and a second element higher in content than any other element in the high refractive index layers.
    Type: Grant
    Filed: September 30, 2022
    Date of Patent: February 13, 2024
    Assignee: HOYA CORPORATION
    Inventors: Kazuhiro Hamamoto, Takashi Uchida
  • Publication number: 20240027891
    Abstract: Provided is a reflective mask blank that makes it possible to form a transfer pattern having a fine pattern shape on a transferred substrate and that is used for manufacturing a reflective mask having a transfer pattern capable of performing EUV exposure with a high throughput. A reflective mask blank comprises: a substrate; a multilayer reflective film on the substrate; and an absorber film on the multilayer reflective film. The absorber film comprises iridium (Ir) and an additive element. The additive element is at least one selected from boron (B), silicon (Si), phosphorus (P), titanium (Ti), germanium (Ge), arsenic (As), selenium (Se), niobium (Nb), molybdenum (Mo), ruthenium (Ru), and tantalum (Ta). The content of the iridium (Ir) in the absorber film is more than 50 atom %.
    Type: Application
    Filed: December 15, 2021
    Publication date: January 25, 2024
    Applicant: HOYA CORPORATION
    Inventor: Kazuhiro HAMAMOTO
  • Publication number: 20230266658
    Abstract: A substrate with a multilayer reflective film, a reflective mask blank, a reflective mask and a method of manufacturing a semiconductor device that can prevent contamination of the surface of the multilayer reflective film even in the case of having formed reference marks on the multilayer reflective film. A substrate with a multilayer reflective film contains a substrate and a multilayer reflective film that reflects EUV light formed on the substrate. Reference marks are formed to a concave shape on the surface of the substrate with the multilayer reflective film. The reference marks have grooves or protrusions roughly in the center. The shape of the grooves or protrusions when viewed from overhead is similar or roughly similar to the shape of the reference marks.
    Type: Application
    Filed: May 2, 2023
    Publication date: August 24, 2023
    Applicant: HOYA CORPORATION
    Inventors: Kazuhiro HAMAMOTO, Tsutomu SHOKI
  • Patent number: 11681214
    Abstract: A substrate with a multilayer reflective film, a reflective mask blank, a reflective mask and a method of manufacturing a semiconductor device that can prevent contamination of the surface of the multilayer reflective film even in the case of having formed reference marks on the multilayer reflective film. A substrate with a multilayer reflective film contains a substrate and a multilayer reflective film that reflects EUV light formed on the substrate. Reference marks are formed to a concave shape on the surface of the substrate with the multilayer reflective film. The reference marks have grooves or protrusions roughly in the center. The shape of the grooves or protrusions when viewed from overhead is similar or roughly similar to the shape of the reference marks.
    Type: Grant
    Filed: January 21, 2022
    Date of Patent: June 20, 2023
    Assignee: HOYA Corporation
    Inventors: Kazuhiro Hamamoto, Tsutomu Shoki
  • Publication number: 20230157305
    Abstract: An emulsified oil and fat composition having a refreshing flavor and sweetness. The emulsified oil and fat composition contains a Koji fermentation product in which the pH value of the aqueous phase is 3.1-6.0 inclusive. The Koji fermentation product may be a Koji fermentation product of rice.
    Type: Application
    Filed: February 24, 2021
    Publication date: May 25, 2023
    Inventors: Kazuhiro HAMAMOTO, Kimiko SAITO, Baku USHIJIMA, Akira OHTA
  • Publication number: 20230051023
    Abstract: Provided is a reflective mask blank which includes an absorber film. The reflective mask blank of the present invention is a reflective mask blank including a multilayer reflective film and a thin film for pattern formation in this order on a main surface of a substrate, in which the thin film contains tin, tantalum, niobium, and oxygen, and the oxygen deficiency rate of the thin film is 0.15 or more and 0.28 or less.
    Type: Application
    Filed: January 28, 2021
    Publication date: February 16, 2023
    Applicant: HOYA CORPORATION
    Inventor: Kazuhiro HAMAMOTO
  • Publication number: 20230025358
    Abstract: A reflective film coated substrate includes a substrate having two main surfaces opposite to each other and end faces connected to outer edges of the two main surfaces; and a reflective film formed on one of the main surfaces and extending onto at least part of the end faces. The reflective film on the main surface has a multilayer structure including low refractive index layers and high refractive index layers alternately formed. The reflective film which extends onto the end faces has a single-layer structure containing a first element higher in content than any other element in the low refractive index layers and a second element higher in content than any other element in the high refractive index layers.
    Type: Application
    Filed: September 30, 2022
    Publication date: January 26, 2023
    Applicant: HOYA CORPORATION
    Inventors: Kazuhiro HAMAMOTO, Takashi UCHIDA
  • Patent number: 11500281
    Abstract: A reflective film coated substrate includes a substrate having two main surfaces opposite to each other and end faces connected to outer edges of the two main surfaces; and a reflective film formed on one of the main surfaces and extending onto at least part of the end faces. The reflective film on the main surface has a multilayer structure including low refractive index layers and high refractive index layers alternately formed. The reflective film which extends onto the end faces has a single-layer structure containing a first element higher in content than any other element in the low refractive index layers and a second element higher in content than any other element in the high refractive index layers.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: November 15, 2022
    Assignee: HOYA CORPORATION
    Inventors: Kazuhiro Hamamoto, Takashi Uchida
  • Publication number: 20220308438
    Abstract: A method for manufacturing a multilayered-reflective-film-provided substrate including a substrate and a multilayer reflective film that reflects EUV light on the substrate, the method includes performing a first defect inspection on the multilayered-reflective-film-provided substrate with a first wavelength to acquire first defect information, performing a second defect inspection on the multilayered-reflective-film-provided substrate with a second wavelength different from the first wavelength to acquire second defect information, and determining whether there is an unmatching defect and a matching defect by comparing the first defect information with the second defect information to acquire third defect information.
    Type: Application
    Filed: February 28, 2022
    Publication date: September 29, 2022
    Applicant: HOYA CORPORATION
    Inventors: Kentaro IWAMOTO, Kazuhiro HAMAMOTO
  • Publication number: 20220146925
    Abstract: A substrate with a multilayer reflective film, a reflective mask blank, a reflective mask and a method of manufacturing a semiconductor device that can prevent contamination of the surface of the multilayer reflective film even in the case of having formed reference marks on the multilayer reflective film. A substrate with a multilayer reflective film contains a substrate and a multilayer reflective film that reflects EUV light formed on the substrate. Reference marks are formed to a concave shape on the surface of the substrate with the multilayer reflective film. The reference marks have grooves or protrusions roughly in the center. The shape of the grooves or protrusions when viewed from overhead is similar or roughly similar to the shape of the reference marks.
    Type: Application
    Filed: January 21, 2022
    Publication date: May 12, 2022
    Applicant: HOYA CORPORATION
    Inventors: Kazuhiro Hamamoto, Tsutomu Shoki
  • Patent number: 11281090
    Abstract: A substrate with a multilayer reflective film, a reflective mask blank, a reflective mask and a method of manufacturing a semiconductor device can prevent contamination of the surface of the multilayer reflective film even in the case of having formed reference marks on the multilayer reflective film. A substrate with a multilayer reflective film contains a substrate, a multilayer reflective film that reflects EUV light formed on the substrate, and a protective film formed on the multilayer reflective film. Reference marks are formed to a concave shape on the surface of the protective film. A surface layer of the reference marks contains an element that is the same as at least one of the elements contained in the protective film. A shrink region, where at least a portion of the plurality of films contained in the multilayer reflective film are shrunk, is formed at the bottom of the reference marks.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: March 22, 2022
    Assignee: HOYA CORPORATION
    Inventors: Kazuhiro Hamamoto, Tsutomu Shoki, Yohei Ikebe
  • Patent number: 11262647
    Abstract: A substrate with a multilayer reflective film, a reflective mask blank, a reflective mask and a method of manufacturing a semiconductor device that can prevent contamination of the surface of the multilayer reflective film even in the case of having formed reference marks on the multilayer reflective film. A substrate with a multilayer reflective film contains a substrate and a multilayer reflective film that reflects EUV light formed on the substrate. Reference marks are formed to a concave shape on the surface of the substrate with the multilayer reflective film. The reference marks have grooves or protrusions roughly in the center. The shape of the grooves or protrusions when viewed from overhead is similar or roughly similar to the shape of the reference marks.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: March 1, 2022
    Assignee: HOYA CORPORATION
    Inventors: Kazuhiro Hamamoto, Tsutomu Shoki
  • Patent number: 11131921
    Abstract: A method of manufacturing a reflective mask blank comprising a multilayer reflective film formed on a substrate so as to reflect EUV light; and a laminated film formed on the multilayer reflective film. The method includes the steps of depositing the multilayer reflective film on the substrate to form a multilayer reflective film formed substrate; carrying out defect inspection for the multilayer reflective film formed substrate; depositing the laminated film on the multilayer reflective film of the multilayer reflective film formed substrate; forming a fiducial mark for an upper portion of the laminated film to thereby form a reflective mask blank comprising the fiducial mark, the fiducial mark serving as a reference for a defect position in defect information; and carrying out defect inspection of the reflective mask blank by using the fiducial mark as a reference.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: September 28, 2021
    Assignee: HOYA CORPORATION
    Inventors: Tsutomu Shoki, Kazuhiro Hamamoto, Yohei Ikebe
  • Patent number: 10996554
    Abstract: A substrate with an electrically conductive film for fabricating a reflective mask is obtained that is capable of preventing positional shift of the reflective mask during pattern transfer. Provided is a substrate with an electrically conductive film used in lithography, the substrate with an electrically conductive film having an electrically conductive film formed on one of the main surfaces of a mask blank substrate, and a coefficient of static friction of the surface of the electrically conductive film is not less than 0.25.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: May 4, 2021
    Assignee: HOYA CORPORATION
    Inventors: Takumi Kobayashi, Kazuhiro Hamamoto, Tatsuo Asakawa, Tsutomu Shoki
  • Publication number: 20210063866
    Abstract: A reflective film coated substrate includes a substrate having two main surfaces opposite to each other and end faces connected to outer edges of the two main surfaces; and a reflective film formed on one of the main surfaces and extending onto at least part of the end faces. The reflective film on the main surface has a multilayer structure including low refractive index layers and high refractive index layers alternately formed. The reflective film which extends onto the end faces has a single-layer structure containing a first element higher in content than any other element in the low refractive index layers and a second element higher in content than any other element in the high refractive index layers.
    Type: Application
    Filed: September 1, 2020
    Publication date: March 4, 2021
    Applicant: HOYA CORPORATION
    Inventors: Kazuhiro HAMAMOTO, Takashi UCHIDA
  • Publication number: 20200310239
    Abstract: A substrate with a multilayer reflective film, a reflective mask blank, a reflective mask and a method of manufacturing a semiconductor device can prevent contamination of the surface of the multilayer reflective film even in the case of having formed reference marks on the multilayer reflective film. A substrate with a multilayer reflective film contains a substrate, a multilayer reflective film that reflects EUV light formed on the substrate, and a protective film formed on the multilayer reflective film. Reference marks are formed to a concave shape on the surface of the protective film. A surface layer of the reference marks contains an element that is the same as at least one of the elements contained in the protective film. A shrink region, where at least a portion of the plurality of films contained in the multilayer reflective film are shrunk, is formed at the bottom of the reference marks.
    Type: Application
    Filed: October 16, 2018
    Publication date: October 1, 2020
    Applicant: HOYA CORPORATION
    Inventors: Kazuhiro HAMAMOTO, Tsutomu SHOKI, Yohei IKEBE
  • Publication number: 20200249558
    Abstract: A substrate with a multilayer reflective film, a reflective mask blank, a reflective mask and a method of manufacturing a semiconductor device that can prevent contamination of the surface of the multilayer reflective film even in the case of having formed reference marks on the multilayer reflective film. A substrate with a multilayer reflective film contains a substrate and a multilayer reflective film that reflects EUV light formed on the substrate. Reference marks are formed to a concave shape on the surface of the substrate with the multilayer reflective film. The reference marks have grooves or protrusions roughly in the center. The shape of the grooves or protrusions when viewed from overhead is similar or roughly similar to the shape of the reference marks.
    Type: Application
    Filed: October 16, 2018
    Publication date: August 6, 2020
    Applicant: HOYA CORPORATION
    Inventors: Kazuhiro HAMAMOTO, Tsutomu SHOKI
  • Publication number: 20200192213
    Abstract: A substrate with an electrically conductive film for fabricating a reflective mask is obtained that is capable of preventing positional shift of the reflective mask during pattern transfer. Provided is a substrate with an electrically conductive film used in lithography, the substrate with an electrically conductive film having an electrically conductive film formed on one of the main surfaces of a mask blank substrate, and a coefficient of static friction of the surface of the electrically conductive film is not less than 0.25.
    Type: Application
    Filed: February 20, 2020
    Publication date: June 18, 2020
    Applicant: HOYA CORPORATION
    Inventors: Takumi KOBAYASHI, Kazuhiro HAMAMOTO, Tatsuo ASAKAWA, Tsutomu SHOKI
  • Patent number: 10642149
    Abstract: A reflective mask blank capable of obtaining high contrast at the edges of a phase shift film pattern. Provided is a reflective mask blank comprising a multilayer reflective film and a phase shift film that shifts the phase of EUV light formed in that order on a substrate, wherein root mean square roughness (Rms), obtained by measuring a 1 ?m×1 ?m region on the surface of the phase shift film with an atomic force microscope, is not more than 0.50 nm, and power spectrum density at a spatial frequency of 10 to 100 ?m?1 is not more than 17 nm4.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: May 5, 2020
    Assignee: HOYA CORPORATION
    Inventors: Kazuhiro Hamamoto, Yohei Ikebe