Patents by Inventor Hiroto Unno

Hiroto Unno 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: 20250219104
    Abstract: The steel foil for a current collector according to the present disclosure includes a ferritic stainless steel foil. In an X-ray diffraction profile with CoK? rays of the ferritic stainless steel foil according to the present disclosure, the half width Fw of the peak for the {110} plane is 0.40 to 0.52°.
    Type: Application
    Filed: January 19, 2023
    Publication date: July 3, 2025
    Applicant: NIPPON STEEL Chemical & Material Co., Ltd.
    Inventors: Atsushi YASHIRO, Noriaki ISHIKAWA, Hiroto UNNO, Yoshiaki HAGIWARA, Jun NAKATSUKA
  • Patent number: 12334563
    Abstract: A high-strength steel foil for the positive and negative electrode current collectors of nickel-hydrogen secondary batteries which uses a light weight and economical steel foil and which is thin and strong and has excellent rust resistance and resistance to metal ion leaching. Also, a high-strength steel foil for the positive and negative electrode current collectors of nickel-hydrogen secondary batteries which has excellent elongation. The Ni-plated steel foil for hydrogen secondary battery current collectors comprises, by mass %, C: 0.0001 to 0.0200%, Si: 0.0001 to 0.0200%, Mn: 0.005 to 0.300%, P: 0.001 to 0.020%, S: 0.0001 to 0.0100%, Al: 0.0005 to 0.1000%, N: 0.0001 to 0.0040%, one or both of Ti and Nb: 0.800% or less respectively, and a balance of Fe and impurities. The Ni-plated steel foil has an Ni plating layer on both surfaces. The thickness of the Ni plating layer on both surfaces of the Ni-plated steel foil is greater than or equal to 0.
    Type: Grant
    Filed: March 24, 2021
    Date of Patent: June 17, 2025
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Hiroto Unno, Masahiro Fukuda, Naoki Fujimoto, Tatsuo Nagata
  • Patent number: 12100844
    Abstract: The present invention has as its technical issue to secure not only mechanical strength but also conductivity by increasing the contact area with the positive electrode active substance or positive electrode mixture while also securing corrosion resistance to alkali or an electrolytic solution when applying stainless steel foil to a current collector for a positive electrode of a secondary battery so as to deal with the increasingly higher capacities and smaller sizes and lighter weights of lithium ion secondary batteries and has as its object the provision of a current collector for a positive electrode of a secondary battery using such stainless steel foil.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: September 24, 2024
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Tatsuo Nagata, Hiroto Unno, Masahiro Fukuda, Naoki Fujimoto
  • Publication number: 20240254606
    Abstract: The present invention addresses the problem of reducing the cause of etching failure or pinholes as much as possible in an extremely thin ferrous alloy foil that has a thickness of 10-30 ?m and that is applied to a metal mask used for increasing the precision of an electronic component. In order to solve the abovementioned problem, the present invention provides a ferrous alloy foil that has a composition containing at most 0.150% of C, at most 2.00% of Si, at most 10.00% of Mn 2.00-50.00% of Ni, at most 19.00% of Cr, at most 0.20% of N, at most 0.030% of Al, at most 5.00% of Co, at most 0.0005% of Mg, at most 0.0005% of Ca, at most 0.01% of Ti, at most 0.035% of P, and at most 0.0300% of S, with the balance consisting of Fe and impurities. The amount of Al2O3 is at most 30 mass % and the amount of MgO is at most 15 mass % with respect to the total mass of inclusions having a particle diameter of 2.00 ?m or larger, and among the inclusions having a particle diameter of 2.
    Type: Application
    Filed: May 13, 2022
    Publication date: August 1, 2024
    Applicant: NIPPON STEEL Chemical & Material Co., Ltd.
    Inventors: Hiroto UNNO, Atsushi YASHIRO, Hiroaki OHARA, Ayaka SAWADA, Naoki FUJIMOTO, Naoya SAWAKI
  • Publication number: 20240254607
    Abstract: Stainless steel foil with a flattening film reducing the number of pits present on the stainless steel foil surface and free of cracks occurring at the flattening film, that is, stainless steel foil with a flattening film, comprising the stainless steel foil having a composition comprising stainless steel constituents and having a balance comprised of Fe and impurities, inclusions having particle diameter 2.00 ?m or more comprising Al2O3:30 mass % or less and MgO:10 mass % or less with respect to a total mass of the particle diameter 2.00 ?m or more inclusions, among the particle diameter 2.00 ?m or more inclusions, the number of inclusions having particle diameter more than 5.00 ?m present on the surface being 20/cm2 or less, and having a sheet thickness of 5.0 ?m or more and 100.0 ?m or less and the flattening film having a film thickness of 0.3 ?m or more and 5.0 ?m or less on at least one surface of the stainless steel foil.
    Type: Application
    Filed: May 16, 2022
    Publication date: August 1, 2024
    Applicant: NIPPON STEEL Chemical & Material Co., Ltd.
    Inventors: Shouhei KAWAI, Hiroto UNNO, Jun NAKATSUKA
  • Patent number: 12037673
    Abstract: A metal mask material for OLED use reduced in amount warpage due to etching, a method for manufacturing the same, and a metal mask are provided. The metal mask material and metal mask of the present invention contain, by mass %, Ni: 35.0 to 37.0% and Co: 0.00 to 0.50%, have a balance of Fe and impurities, have thicknesses of 5.00 ?m or more and 50.00 ?m or less, and have amounts of warpage defined as maximum values in amounts of rise of four corners of a square shaped sample of the metal mask material of 100 mm sides when etching the sample from one surface until the thickness of the sample becomes ? and placing the etched sample on a surface plate of 5.0 mm or less.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: July 16, 2024
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Mitsuharu Yonemura, Naoki Fujimoto, Keita Kimura, Hiroto Unno
  • Publication number: 20230312343
    Abstract: Aluminum nitride particles which are excellent in high thermal conductivity and useful as a filler for a heat dissipating material and which have good fluidity for improving the fillability, that is, spherical AlN particles containing Zr atoms with respect to Al atoms in an amount of a molar ratio Zr/Al=4.0×10?4 to 4.2×10?2, having an AlN conversion rate of 70.0% or more, and having a circularity of 0.85 to 1.00.
    Type: Application
    Filed: August 18, 2021
    Publication date: October 5, 2023
    Applicant: NIPPON STEEL Chemical & Material Co., Ltd.
    Inventors: Kazuhiko KUSUNOKI, Kenya SATO, Hiroto UNNO, Ryutaro NUMAO
  • Publication number: 20230146305
    Abstract: A high-strength steel foil for the positive and negative electrode current collectors of nickel-hydrogen secondary batteries which uses a light weight and economical steel foil and which is thin and strong and has excellent rust resistance and resistance to metal ion leaching. Also, a high-strength steel foil for the positive and negative electrode current collectors of nickel-hydrogen secondary batteries which has excellent elongation. The Ni-plated steel foil for hydrogen secondary battery current collectors comprises, by mass %, C: 0.0001 to 0.0200%, Si: 0.0001 to 0.0200%, Mn: 0.005 to 0.300%, P: 0.001 to 0.020%, S: 0.0001 to 0.0100%, Al: 0.0005 to 0.1000%, N: 0.0001 to 0.0040%, one or both of Ti and Nb: 0.800% or less respectively, and a balance of Fe and impurities. The Ni-plated steel foil has an Ni plating layer on both surfaces. The thickness of the Ni plating layer on both surfaces of the Ni-plated steel foil is greater than or equal to 0.
    Type: Application
    Filed: March 24, 2021
    Publication date: May 11, 2023
    Applicant: NIPPON STEEL Chemical & Material Co., Ltd.
    Inventors: Hiroto UNNO, Masahiro FUKUDA, Naoki FUJIMOTO, Tatsuo NAGATA
  • Patent number: 11198918
    Abstract: The present invention has as its object to provide thickness 60 ?m or less ultra-thin stainless steel foil which secures high thickness precision and simultaneously secures plastic deformability and good elongation at break, that is, secures good press-formability (deep drawability). The present invention solves this problem by ultra-thin stainless steel foil which has three or more crystal grains in a thickness direction, has a recrystallization rate of 90% to 100%, and has a nitrogen concentration of a surface layer of 1.0 mass % or less. For this reason, there is provided a method of production of stainless steel foil comprising rolling stainless steel sheet, then performing final annealing and making a thickness 5 ?m to 60 ?m, wherein a rolling reduction ratio at rolling right before final annealing is 30% or more, a temperature of final annealing after rolling is 950° C. to 1050° C. in the case of austenitic stainless steel and 850° C. to 950° C.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: December 14, 2021
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Hiroto Unno, Shinichi Terashima, Toru Inaguma, Koichi Nose, Naoki Fujimoto, Naoya Sawaki, Shuji Nagasaki
  • Publication number: 20210340664
    Abstract: A metal mask material for OLED use reduced in amount warpage due to etching, a method for manufacturing the same, and a metal mask are provided. The metal mask material and metal mask of the present invention contain, by mass %, Ni: 35.0 to 37.0% and Co: 0.00 to 0.50%, have a balance of Fe and impurities, have thicknesses of 5.00 ?m or more and 50.00 ?m or less, and have amounts of warpage defined as maximum values in amounts of rise of four corners of a square shaped sample of the metal mask material of 100 mm sides when etching the sample from one surface until the thickness of the sample becomes ? and placing the etched sample on a surface plate of 5.0 mm or less.
    Type: Application
    Filed: September 27, 2019
    Publication date: November 4, 2021
    Applicant: NIPPON STEEL Chemical & Material Co., Ltd.
    Inventors: Mitsuharu YONEMURA, Naoki FUJIMOTO, Keita KIMURA, Hiroto UNNO
  • Publication number: 20210273232
    Abstract: The present invention has as its technical issue to secure not only mechanical strength but also conductivity by increasing the contact area with the positive electrode active substance or positive electrode mixture while also securing corrosion resistance to alkali or an electrolytic solution when applying stainless steel foil to a current collector for a positive electrode of a secondary battery so as to deal with the increasingly higher capacities and smaller sizes and lighter weights of lithium ion secondary batteries and has as its object the provision of a current collector for a positive electrode of a secondary battery using such stainless steel foil.
    Type: Application
    Filed: June 27, 2019
    Publication date: September 2, 2021
    Applicant: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Tatsuo NAGATA, Hiroto UNNO, Masahiro FUKUDA, Naoki FUJIMOTO
  • Patent number: 10844457
    Abstract: The present invention provides a ferritic stainless steel foil high in stretch-expand formability and further small in anisotropy of deformation with respect to stretch-expand forming even with ultrathin steel foil with a thickness of 60 ?m or less. The ferritic stainless steel foil has a thickness of 5 ?m to 60 ?m, wherein a recrystallization rate of the stainless steel foil is 90% to 100%, and in an orientation distribution function obtained by analysis of a crystalline texture of the stainless steel foil, when a Euler angle ?2 is 45°±10°, at a plane expressed by a Euler angle ? of 53.4°±10°, a maximum peak strength ratio in peak strength ratios shown by orientations corresponding to a Euler angle ?1 is 25 or less, where the Euler angle ?1 is 0 to 90°. The ferritic stainless steel foil may be laminated with a resin film and is useful for producing a battery case.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: November 24, 2020
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Hiroto Unno, Naoya Sawaki, Naoki Fujimoto, Masahiro Fukuda, Tomohiro Uno, Toru Inaguma
  • Patent number: 10786974
    Abstract: The present invention provide a ferritic stainless steel foil having a high thickness precision even with a thickness 60 ?m or less ultrathin stainless steel foil and simultaneously having a plastic deformation ability and good elongation at break, that is, having a good press-formability (deep drawing ability). The present invention is a stainless steel foil having a thickness of 5 ?m to 60 ?m, wherein a recrystallization ratio of said stainless steel foil is 90% to 100%, a surface layer of said stainless steel foil has a nitrogen concentration of 1.0 mass % or less, three or more crystal grains are contained in the thickness direction of said stainless steel foil, an average crystal grain diameter “d” of said crystal grains is 1 ?m to 10 ?m, and, when said thickness is “t” (?m), an area ratio of crystal grains having a crystal grain diameter of t/3 (?m) or more is 20% or less.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: September 29, 2020
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Hiroto Unno, Naoya Sawaki, Naoki Fujimoto, Masahiro Fukuda, Tomohiro Uno, Toru Inaguma
  • Patent number: 10741802
    Abstract: A steel foil for an electrical storage device container, including a steel foil, a metal chromium layer layered on the steel foil, and a hydrated chromium oxide layer layered on the metal chromium layer, in which the concentration of Fe from a surface of the hydrated chromium oxide layer to a depth of 10 nm is less than 10% by mass, the area ratio of a site having an arithmetic mean roughness Ra of 10 nm or more in a visual field of 1 ?m at the surface of the hydrated chromium oxide layer is less than 20%, and a site having an arithmetic mean roughness Ra of less than 10 nm in a visual field of 1 ?m has an arithmetic mean roughness Ra of 3 nm or less in a visual field of 1 ?m at the surface of the hydrated chromium oxide layer, is adopted.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: August 11, 2020
    Assignees: NIPPON STEEL CORPORATION, NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Masaharu Ibaragi, Koichi Nose, Yasuto Goto, Nobuo Kadowaki, Hiroto Unno
  • Patent number: 10418601
    Abstract: A steel foil for a power storage device container includes a rolled steel foil which has a thickness of 200 ?m or less, a diffusion alloy layer which is formed on a surface layer of the rolled steel foil and contains Ni and Fe, and a chromium-based surface treatment layer which is formed on the diffusion alloy layer. The <111> polar density in a reverse pole figure of the diffusion alloy layer in a rolling direction is 2.0 to 6.0, and the aspect ratio of crystal in a surface of the diffusion alloy layer is 1.0 to 5.0.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: September 17, 2019
    Assignees: NIPPON STEEL CORPORATION, NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Masaharu Ibaragi, Koichi Nose, Kiyokazu Ishizuka, Yasuto Goto, Shuji Nagasaki, Hiroto Unno
  • Patent number: 10323294
    Abstract: Provided is an austenitic stainless steel foil that demonstrates a high degree of stretch formability and little deformation anisotropy with respect to stretch forming despite having a sheet thickness of 60 ?m or less. The austenitic stainless steel foil of the present invention has a sheet thickness of 5 ?m to 60 ?m, a recrystallization rate of 90% to 100%, and a texture in which the total of the area ratio of a crystal orientation in which the difference in orientation from the {112}<111> orientation is within 10°, the area ratio of a crystal orientation in which the difference in orientation from the {110}<112> orientation is within 10°, and the area ratio of a crystal orientation in which the difference in orientation from the {110}<001> orientation is within 10°, in a measuring field thereof, is 20% or less.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: June 18, 2019
    Assignee: NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.
    Inventors: Hiroto Unno, Naoya Sawaki, Naoki Fujimoto, Masahiro Fukuda, Tomohiro Uno, Toru Inaguma
  • Patent number: 10205135
    Abstract: A steel foil for a power storage device container includes a rolled steel foil, a nickel layer formed on a surface of the rolled steel foil, and a chromium-based surface treatment layer formed on a surface of the nickel layer. The nickel layer includes an upper layer portion which is in contact with the chromium-based surface treatment layer and contains Ni of 90 mass % or more among metal elements, and a lower layer portion which is in contact with the rolled steel foil and contains Ni of less than 90 mass % among the metal elements and Fe. <111> polar density in a reverse pole figure of the nickel layer in a rolling direction is 3.0 to 6.0. The nickel layer has a sub-boundary which is a boundary between two crystals having a relative orientation difference of 2° to 5°, and a large angle boundary which is a boundary between two crystals having the relative orientation difference of equal to or more than 15°.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: February 12, 2019
    Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.
    Inventors: Masaharu Ibaragi, Koichi Nose, Kiyokazu Ishizuka, Yasuto Goto, Shuji Nagasaki, Hiroto Unno
  • Publication number: 20180282834
    Abstract: The present invention provide a ferritic stainless steel foil high in stretch-expand formability and further small in anisotropy of deformation with respect to stretch-expand forming even with ultrathin steel foil with a thickness of 60 ?m or less. The present invention is a ferritic stainless steel foil having a thickness of 5 ?m to 60 ?m, wherein a recrystallization rate of said stainless steel foil is 90% to 100%, and in an orientation distribution function obtained by analysis of a crystalline texture of said stainless steel foil, when a Euler angle ?2 is 45°±10°, at the plane expressed by a Euler angle ? of 53.4°±10°, the maximum peak strength ratio in the peak strength ratios shown by orientations corresponding to the Euler angle ?1 is 25 or less, where the Euler angle ?1 is 0 to 90°.
    Type: Application
    Filed: August 16, 2016
    Publication date: October 4, 2018
    Applicant: NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.
    Inventors: Hiroto UNNO, Naoya SAWAKI, Naoki FUJIMOTO, Masahiro FUKUDA, Tomohiro UNO, Toru INAGUMA
  • Publication number: 20180237882
    Abstract: Provided is an austenitic stainless steel foil that demonstrates a high degree of stretch formability and little deformation anisotropy with respect to stretch forming despite having a sheet thickness of 60 ?m or less. The austenitic stainless steel foil of the present invention has a sheet thickness of 5 ?m to 60 ?m, a recrystallization rate of 90% to 100%, and a texture in which the total of the area ratio of a crystal orientation in which the difference in orientation from the {112}<111> orientation is within 10°, the area ratio of a crystal orientation in which the difference in orientation from the {110}<112> orientation is within 10°, and the area ratio of a crystal orientation in which the difference in orientation from the {110}<001> orientation is within 10°, in a measuring field thereof, is 20% or less.
    Type: Application
    Filed: August 17, 2016
    Publication date: August 23, 2018
    Applicant: NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.
    Inventors: Hiroto UNNO, Naoya SAWAKI, Naoki FUJIMOTO, Masahiro FUKUDA, Tomohiro UNO, Toru INAGUMA
  • Publication number: 20180229476
    Abstract: The present invention provide a ferritic stainless steel foil having a high thickness precision even with a thickness 60 ?m or less ultrathin stainless steel foil and simultaneously having a plastic deformation ability and good elongation at break, that is, having a good press-formability (deep drawing ability). The present invention is a stainless steel foil having a thickness of 5 ?m to 60 ?m, wherein a recrystallization ratio of said stainless steel foil is 90% to 100%, a surface layer of said stainless steel foil has a nitrogen concentration of 1.0 mass % or less, three or more crystal grains are contained in the thickness direction of said stainless steel foil, an average crystal grain diameter “d” of said crystal grains is 1 ?m to 10 ?m, and, when said thickness is “t” (?m), an area ratio of crystal grains having a crystal grain diameter of t/3 (?m) or more is 20% or less.
    Type: Application
    Filed: August 17, 2016
    Publication date: August 16, 2018
    Applicant: NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.
    Inventors: Hiroto UNNO, Naoya SAWAKI, Naoki FUJIMOTO, Masahiro FUKUDA, Tomohiro UNO, Toru INAGUMA