Patents by Inventor Yuki Tauchi

Yuki Tauchi 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: 20210210118
    Abstract: A recording layer for an optical data recording medium is described. Recording is performed by irradiating the recording layer with a laser beam. The recording layer contains a W oxide, an Fe oxide, and at least one of a Ta oxide and a Nb oxide. The recording layer contains 10-60 atomic % of Fe and a total of 3-50 atomic % of Ta and Nb relative to the total metal atoms therein.
    Type: Application
    Filed: May 22, 2019
    Publication date: July 8, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventor: Yuki TAUCHI
  • Patent number: 10971183
    Abstract: A dielectric layer is formed from an oxide containing Sn and at least one of Zn, Zr, Si and Ga. The molar percentages of Sn, Zn, Zr, Si, and Ga, relative to the total elements in the oxide, represented by a, b, c, d, and e, respectively, satisfy the conditions (1)-(7): (1) 0?b/(a+b)?0.6, (2) 0?(c+d)/(a+b+c+d+e)?0.5, (3) 0?b?50, (4) 0?c?40, (5) 0?d?45, (6) 0?e?40, and (7) 20?b+c+d+e?80. The dielectric layer enables favorable information recording in an oxide-based recording layer on which the dielectric layer is directly overlaid, does not require preventive measures for health hazard, and is superior in durability.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: April 6, 2021
    Assignee: Kobe Steel, Ltd.
    Inventor: Yuki Tauchi
  • Publication number: 20210035606
    Abstract: A recording layer for an optical data recording medium according to one embodiment of the present invention makes it possible to record an information signal by irradiation with laser beam. The recording layer for an optical data recording medium comprises metal oxides including a Mn oxide, a W oxide, and a Sn oxide. The atomic ratio of Mn with respect to the total number of atoms of metal elements constituting the metal oxides is 3-40 atm %.
    Type: Application
    Filed: May 8, 2019
    Publication date: February 4, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventor: Yuki TAUCHI
  • Publication number: 20200168248
    Abstract: The present invention relates to a read-only optical information recording medium in which at least one reflection film and at least one light transmission layer are laid in order on a substrate and from which information is reproduced by blue laser. The reflection film includes a metal oxide containing Sn and Zn or a metal oxide containing In. The reflection film has a film thickness of 20 nm or more and 70 nm or less.
    Type: Application
    Filed: April 24, 2018
    Publication date: May 28, 2020
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventor: Yuki TAUCHI
  • Publication number: 20190355389
    Abstract: A dielectric layer is formed from an oxide containing Sn and at least one of Zn, Zr, Si and Ga. The molar percentages of Sn, Zn, Zr, Si, and Ga, relative to the total elements in the oxide, represented by a, b, c, d, and e, respectively, satisfy the conditions (1)-(7): (1) 0?b/(a+b)?0.6, (2) 0?(c+d)/(a+b+c+d+e)?0.5, (3) 0?b?50, (4) 0?c?40, (5) 0?d?45, (6) 0?e?40, and (7) 20?b+c+d+e?80. The dielectric layer enables favorable information recording in an oxide-based recording layer on which the dielectric layer is directly overlaid, does not require preventive measures for health hazard, and is superior in durability.
    Type: Application
    Filed: January 15, 2018
    Publication date: November 21, 2019
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventor: Yuki TAUCHI
  • Patent number: 9214181
    Abstract: Provided is a recording film for an optical information recording medium with which it is possible to meet all predetermined characteristics requirements and increase productivity while reducing the number of layers in the optical information recording medium. The present invention relates to a recording film for an optical information recording medium on which recording is performed by laser light irradiation, wherein the recording film for an optical information recording medium includes: Mn; at least one element (group X element) selected from the group consisting of Bi, Ag, Co, Cu, In, Sn, and Zn (group X); and oxygen (O). At least some of the Mn and at least some of the group X element are oxidized.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: December 15, 2015
    Assignee: Kobe Steel, Ltd.
    Inventors: Yoko Shida, Yuki Tauchi
  • Publication number: 20140369884
    Abstract: The present invention provides an Ag alloy film which exhibits a low-level electrical resistivity nearly equivalent to that of a pure Ag film and which is superior to a conventional Ag alloy film in durability (specifically, resistances to salt water and halogen) and in the adhesion to a substrate. Further, the deposition rate of this Ag alloy film by sputtering is as high as that of a pure Ag film. Provided is an Ag alloy film useful as a reflecting film and/or a transmitting film or as an electrical wiring and/or an electrode, including 0.1 to 1.5 atomic % of at least one element selected from Pd, Au and Pt, and 0.02 to 1.5 atomic % of at least one element selected from at least one rare earth element, Bi and Zn with the balance being Ag and inevitable impurities.
    Type: Application
    Filed: January 22, 2013
    Publication date: December 18, 2014
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Yuki Tauchi, Yoko Shida, Hiroyuki Okuno
  • Publication number: 20140342104
    Abstract: An Ag alloy film for use in reflective electrodes is provided, which has a low electrical resistivity and a high reflectance that are almost at the same levels as those of an Ag film, and has excellent oxidation resistance. An Ag alloy film for reflective electrodes, which can be used in a reflective electrode and is characterized in that at least one element selected from the group consisting of In and Zn is contained in an amount of 0.1 to 2.0 atomic %.
    Type: Application
    Filed: December 19, 2012
    Publication date: November 20, 2014
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Yuki Tauchi, Yoko Shida
  • Patent number: 8747985
    Abstract: An optical recording medium including a substrate and two or more recording layers that contain Pd, O, and M (M comprises at least one of Zn, Al, In, and Sn), where O is contained in an amount greater than a stoichiometric composition thereof when M is completely oxidized (into ZnO, Al2O3, In2O3, and SnO2). An nth recording layer of the two or more recording layers, as counted from an opposite side of an incident side of recording light, has a Pd content that is less than that of an (n?1)th recording layer.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: June 10, 2014
    Assignees: Sony Corporation, Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Takeshi Miki, Yuki Tauchi
  • Publication number: 20140093672
    Abstract: Provided is a recording film for an optical information recording medium with which it is possible to meet all predetermined characteristics requirements and increase productivity while reducing the number of layers in the optical information recording medium. The present invention relates to a recording film for an optical information recording medium on which recording is performed by laser light irradiation, wherein the recording film for an optical information recording medium includes: Mn; at least one element (group X element) selected from the group consisting of Bi, Ag, Co, Cu, In, Sn, and Zn (group X); and oxygen (O). At least some of the Mn and at least some of the group X element are oxidized.
    Type: Application
    Filed: May 30, 2012
    Publication date: April 3, 2014
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yoko Shida, Yuki Tauchi
  • Patent number: 8685517
    Abstract: [Object] To provide an optical recording medium that can be applied to a write-once optical recording medium having a high capacity of about 25 GB per one layer, and has good recording properties when a multilayered recording layer configuration is provided. [Solving Means] It includes a substrate 21 and two to four recording layers 221 and 222. At least one or more of these recording layers 221 and 222 are specific recording layers with a composition containing PdO and PdO2 as well as at least one of completely oxidized In, Zn, Al and Sn (in other words, In2O3, ZnO, Al2O3 and SnO2). Adjacent to the specific recording layers, dielectric layers 232a and 232b of In/Al oxide layers containing at least either of In or Al as a main component are disposed.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: April 1, 2014
    Assignees: Sony Corporation, Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Takeshi Miki, Manami Miyawaki, Yuki Tauchi
  • Patent number: 8597757
    Abstract: A recording layer for optical information recording medium excellent in recording property, an optical information recording medium including the recording layer and a sputtering target useful for formation of the recording layer are provided. A recording layer for an optical information recording medium on which recording is performed through irradiation with laser light, the recording layer including an oxide of a metal of which an absolute value of the standard free energy of oxide formation per 1 mol of oxygen is larger than that of Pd (hereinafter referred to metal X) and a Pd oxide, wherein the Pd oxide includes a Pd monoxide and a Pd dioxide, and wherein a ratio of the Pd atom to a total of the metal X atom and the Pd atom which are contained in the recording layer is 4 to 85 atomic %.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: December 3, 2013
    Assignees: Kobe Steel, Ltd., Sony Corporation
    Inventors: Yuki Tauchi, Yoko Shida, Takeshi Miki, Yasuhiro Sone
  • Patent number: 8530024
    Abstract: A recording layer excellent in recording property, an optical information recording medium including the recording layer, and a sputtering target for producing the recording layer. The recording layer on which recording is performed through irradiation with a laser light, contains: a Pd oxide; a Ag oxide; and an oxide of a metal X of having an absolute value of the standard free energy of oxide formation per 1 mol of oxygen that is larger than an oxide of Pd and Ag, wherein a ratio of Pd atom to a total (metal X atom+Pd atom+Ag atom) is from 10 to 60 atomic %, a ratio of Ag atom to the total is from 5 to 45 atomic %, and a ratio of Pd atom and the Ag atom to the total is 75 atomic % or less.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: September 10, 2013
    Assignees: Kobe Steel, Ltd., Sony Corporation
    Inventors: Yuki Tauchi, Yoko Shida, Yasuhiro Sone
  • Publication number: 20130164544
    Abstract: [Object] To provide an optical recording layer that is capable of controlling a reflectance and a transmittance of each recording layer and obtaining good recording properties in each recording layer [Solving Means] An optical recording medium 10 includes a substrate 11 and two or more layers of recording layers 121, 122, and 123 that contain Pd, O, and M (M is one or more elements of Zn, Al, In, and Sn), O is contained in an amount greater than a stoichiometric composition thereof when M is completely oxidized (into ZnO, Al2O3, In2O3, and SnO2), and in a case where a recording layer is an nth recording layer of the two or more layers of recording layers 121, 122, and 123 as counted from an opposite side of an incident side of recording light, a Pd content therein is less than that in an n?1th recording layer.
    Type: Application
    Filed: September 9, 2011
    Publication date: June 27, 2013
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO, SONY CORPORATION
    Inventors: Takeshi Miki, Yuki Tauchi
  • Publication number: 20130052389
    Abstract: [Object] To provide an optical recording medium that can be applied to a write-once optical recording medium having a high capacity of about 25 GB per one layer, and has good recording properties when a multilayered recording layer configuration is provided. [Solving Means] It includes a substrate 21 and two to four recording layers 221 and 222. At least one or more of these recording layers 221 and 222 are specific recording layers with a composition containing PdO and PdO2 as well as at least one of completely oxidized In, Zn, Al and Sn (in other words, In2O3, ZnO, Al2O3 and SnO2). Adjacent to the specific recording layers, dielectric layers 232a and 232b of In/Al oxide layers containing at least either of In or Al as a main component are disposed.
    Type: Application
    Filed: March 4, 2011
    Publication date: February 28, 2013
    Applicants: Sony Corporation, Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Takeshi Miki, Manami Miyawaki, Yuki Tauchi
  • Patent number: 8309195
    Abstract: An optical information recording medium of the present invention is a read-only optical information recording medium in which at least one reflective film formed of an Al-based alloy and at least one light transmission layer are successively laminated on a substrate. The arithmetical mean roughness of the reflective film is 0.5 nm or less, and the thickness of the reflective film is 25 nm or more. The optical information recording medium of the present invention is the read-only optical information recording medium including the reflective film which has a high reflectivity and low jitter, preferably has excellent durability, and is used particularly appropriately in an optical disc using a blue laser such as BD-ROM or HD DVD-ROM.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: November 13, 2012
    Assignee: Kobe Steel, Ltd.
    Inventors: Norihiro Jiko, Junichi Nakai, Yuki Tauchi
  • Publication number: 20120225323
    Abstract: Disclosed is a thermal diffusion control film to be used in a magnetic medium for thermally assisted recording, said thermal diffusion control film maintaining a high heat conductivity, and at the same time, having all of a high thermal diffusivity, a smooth surface roughness, and a high heat resistance. The thermal diffusion control film, i.e., an Ag alloy thermal diffusion control film, is composed of an Ag alloy having Ag as a main component, and satisfies a surface roughness (Ra) of 1.0 nm or less, a heat conductivity of 100 W/(m·K) or more, and a thermal diffusivity of 4.0×10?5 m2/s or more.
    Type: Application
    Filed: November 17, 2010
    Publication date: September 6, 2012
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Junichi Nakai, Yuki Tauchi
  • Publication number: 20120176883
    Abstract: A recording layer for optical information recording medium excellent in recording property, an optical information recording medium including the recording layer and a sputtering target useful for formation of the recording layer are provided. A recording layer for an optical information recording medium on which recording is performed through irradiation with laser light, the recording layer including an oxide of a metal of which an absolute value of the standard free energy of oxide formation per 1 mol of oxygen is larger than that of Pd (hereinafter referred to metal X) and a Pd oxide, wherein the Pd oxide includes a Pd monoxide and a Pd dioxide, and wherein a ratio of the Pd atom to a total of the metal X atom and the Pd atom which are contained in the recording layer is 4 to 85 atomic %.
    Type: Application
    Filed: September 16, 2010
    Publication date: July 12, 2012
    Applicants: SONY CORPORATION, KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL LTD.)
    Inventors: Yuki Tauchi, Yoko Shida, Takeshi Miki, Yasuhiro Sone
  • Publication number: 20120177863
    Abstract: A recording layer excellent in recording property, an optical information recording medium including the recording layer, and a sputtering target for producing the recording layer. The recording layer on which recording is performed through irradiation with a laser light, contains: a Pd oxide; a Ag oxide; and an oxide of a metal X of having an absolute value of the standard free energy of oxide formation per 1 mol of oxygen that is larger than an oxide of Pd and Ag, wherein a ratio of Pd atom to a total (metal X atom+Pd atom+Ag atom) is from 10 to 60 atomic %, a ratio of Ag atom to the total is from 5 to 45 atomic %, and a ratio of Pd atom and the Ag atom to the total is 75 atomic % or less.
    Type: Application
    Filed: September 17, 2010
    Publication date: July 12, 2012
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.), SONY CORPORATION
    Inventors: Yuki Tauchi, Yoko Shida, Yasuhiro Sone
  • Patent number: 8187689
    Abstract: A pirated optical recording medium may be determined which is produced by physically transferring a shape of pits and lands formed on a substrate of an optical recording medium. The optical recording medium is provided with excellent weatherability and long-term storage reliability. A reflective film formed of an Ag alloy film of Ag100-x-yXxCuy, where X is at least one element among Ti, W, Ta, V, Mo, Nb and Zr, is formed on a substrate on which main data is recorded with a combination of pits and lands. A mark may be formed so that a reproduction signal level in the recorded mark of auxiliary data write once recorded on the reflective film is increased, and a reproduction signal level is decreased in an optical recording medium prepared by physically transferring the surface shape of the pits and lands of the substrate. A pirated optical recording medium may be determined in this manner.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: May 29, 2012
    Assignees: Sony Corporation, Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Tetsuhiro Sakamoto, Jun Nakano, Naoki Okawa, Junichi Nakai, Yuki Tauchi