Patents by Inventor Teruo Sai

Teruo Sai 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: 11468910
    Abstract: A tape-like magnetic recording medium includes a reinforced substrate, and a recording layer arranged on the reinforced substrate, and the reinforced substrate includes a substrate that has a first face and a second face opposed to each other, and has an average thickness of 4 ?m or smaller, and a metal layer that contains cobalt, arranged on the first face, the reinforced substrate by itself causing thereon a depth of indentation of 0.25 ?m or shallower, when a 0.7-mm-diameter hard sphere is impressed against the second face under 5.0 gf load for 10 seconds.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: October 11, 2022
    Assignee: Sony Corporation
    Inventors: Hiroto Atagi, Noboru Sekiguchi, Takashi Aizawa, Tomoe Ozaki, Koji Suzuki, Yoichi Kanemaki, Teruo Sai, Ryoichi Hiratsuka, Kazuya Hashimoto
  • Patent number: 11437066
    Abstract: To provide a magnetic recording tape and the like that have excellent magnetic properties and exhibit a favorable SNR. There are provided a magnetic recording tape and the like including at least: a base layer that includes a long film having flexibility; and a magnetic layer formed on a side of one main surface of the base layer, in which an under layer and a seed layer are provided in the stated order from a side of the magnetic layer toward a side of the base layer between the magnetic layer and the base layer, the underlayer contains at least Co and Cr, and has an average atomic number ratio represented by the following formula (1): Co(100-y)Cry (where y is within a range of 37?y?45.), and the seed layer formed directly on the base layer has a film thickness of 5 nm or more and 30 nm or less, and contains Ti and O and has an average atomic number ratio represented by the following formula (2): Ti(100-x)Ox (where x?10.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: September 6, 2022
    Assignee: SONY CORPORATION
    Inventors: Junichi Tachibana, Sogo Oikawa, Koji Suzuki, Teruo Sai, Tomoe Ozaki
  • Publication number: 20220108723
    Abstract: A tape-like magnetic recording medium includes a reinforced substrate, and a recording layer arranged on the reinforced substrate, and the reinforced substrate includes a substrate that has a first face and a second face opposed to each other, and has an average thickness of 4 ?m or smaller, and a metal layer that contains cobalt, arranged on the first face, the reinforced substrate by itself causing thereon a depth of indentation of 0.25 ?m or shallower, when a 0.7-mm-diameter hard sphere is impressed against the second face under 5.0 gf load for 10 seconds.
    Type: Application
    Filed: August 29, 2019
    Publication date: April 7, 2022
    Inventors: Hiroto ATAGI, Noboru SEKIGUCHI, Takashi AIZAWA, Tomoe OZAKI, Koji SUZUKI, Yoichi KANEMAKI, Teruo SAI, Ryoichi HIRATSUKA, Kazuya HASHIMOTO
  • Publication number: 20210118468
    Abstract: To provide a magnetic recording tape and the like that have excellent magnetic properties and exhibit a favorable SNR. There are provided a magnetic recording tape and the like including at least: a base layer that includes a long film having flexibility; and a magnetic layer formed on a side of one main surface of the base layer, in which an under layer and a seed layer are provided in the stated order from a side of the magnetic layer toward a side of the base layer between the magnetic layer and the base layer, the underlayer contains at least Co and Cr, and has an average atomic number ratio represented by the following formula (1): Co(100-y)Cry (where y is within a range of 37?y?45.), and the seed layer formed directly on the base layer has a film thickness of 5 nm or more and 30 nm or less, and contains Ti and O and has an average atomic number ratio represented by the following formula (2): Ti(100-x)Ox (where x?10.
    Type: Application
    Filed: February 14, 2019
    Publication date: April 22, 2021
    Inventors: JUNICHI TACHIBANA, SOGO OIKAWA, KOJI SUZUKI, TERUO SAI, TOMOE OZAKI
  • Publication number: 20200075051
    Abstract: A magnetic recording medium includes: a flexible and elongated substrate; a soft magnetic layer having an average thickness of 10 nm or more to 50 nm or less; and a recording layer, in which the soft magnetic layer is disposed between the substrate and the recording layer, and a difference in Young's modulus between the magnetic recording medium and the substrate in a longitudinal direction of the substrate is 2.4 GPa or more.
    Type: Application
    Filed: April 6, 2018
    Publication date: March 5, 2020
    Inventors: JUNICHI TACHIBANA, TAKASHI AIZAWA, TERUO SAI, NOBORU SEKIGUCHI, TETSUO ENDO, TOMOE OZAKI, RYOICHI HIRATSUKA
  • Patent number: 10580447
    Abstract: A magnetic recording medium has a recording surface having an average surface roughness SRa of 3.0 nm or less, the number of projections having a height of 7.5 nm or more included in a unit region (where the unit region is a square region with each side having a length of 30 ?m) of the recording surface is 256 or more, and the number of projections having a height of 15 nm or more included in the unit region of the recording surface is 0 or more and 104 or less.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: March 3, 2020
    Assignee: Sony Corporation
    Inventors: Noboru Sekiguchi, Tomoe Ozaki, Tetsuo Endo, Takashi Aizawa, Junichi Tachibana, Hikaru Terui, Teruo Sai
  • Publication number: 20180137887
    Abstract: A magnetic recording medium has a recording surface having an average surface roughness SRa of 3.0 ?m or less, the number of projections having a height of 7.5 nm or more included in a unit region (where the unit region is a square region with each side having a length of 30 ?m) of the recording surface is 256 or more, and the number of projections having a height of 15 nm or more included in the unit region of the recording surface is 0 or more and 104 or less.
    Type: Application
    Filed: May 12, 2016
    Publication date: May 17, 2018
    Inventors: Noboru Sekiguchi, Tomoe Ozaki, Tetsuo Endo, Takashi Aizawa, Junichi Tachibana, Hikaru Terui, Teruo Sai