Patents Examined by Holly Rickman
  • Magnetic recording medium and magnetic recording and reproducing apparatus
    Patent number: 9595285
    Abstract: According to one embodiment, a magnetic recording medium includes an orientation control layer formed on a non-magnetic substrate, the orientation control layer made of a Ni alloy or Ag alloy having fcc structure, a non-magnetic seed layer made of Ag, Ge, and a metal X selected from the group consisting of Al, Mg, Au, and Ti, a non-magnetic intermediate layer made of Ru or Ru alloy, and a magnetic recording layer. The orientation control layer is in contact with the non-magnetic seed layer.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: March 14, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeshi Iwasaki, Akira Fujimoto
  • Magnetic powder for magnetic recording, magnetic recording medium, and method of manufacturing magnetic powder for magnetic recording
    Patent number: 9589585
    Abstract: An aspect of the present invention relates to magnetic powder, which is magnetoplumbite hexagonal strontium ferrite magnetic powder comprising 0.05 atomic percent to 3 atomic percent of Ca per 100 atomic percent of Fe, but comprising no rare earth elements or transition metal elements other than Fe, the average particle size of which ranges from 10 nm to 25 nm, and which is magnetic powder for magnetic recording.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: March 7, 2017
    Assignee: FUJIFILM Corporation
    Inventor: Masashi Shirata
  • Magnetic powder for magnetic recording, magnetic recording medium, and method of manufacturing magnetic powder for magnetic recording
    Patent number: 9589584
    Abstract: An aspect of the present invention relates to magnetic powder, which is magnetoplumbite hexagonal strontium ferrite magnetic powder comprising 1 atomic percent to 5 atomic percent of Ba per 100 atomic percent of Fe, the average particle size of which ranges from 10 nm to 25 nm, and which is magnetic powder for magnetic recording.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: March 7, 2017
    Assignee: FUJIFILM Corporation
    Inventor: Masashi Shirata
  • Magnetic recording medium and magnetic coating composition for magnetic recording medium
    Patent number: 9562167
    Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein the magnetic layer further comprises a compound which has a weight average molecular weight of equal to or more than 1,000 but less than 20,000 and is denoted by formula (1): wherein, in formula (1), A denotes a monovalent substituent, R1 denotes a single bond or a divalent connecting group, and m denotes an integer ranging from 2 to 4, multiple instances of A and R1 that are present can be identical or different, at least one of the multiple instances of A that are present denotes a monovalent polymer group and X denotes a heterocyclic group of valence m.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: February 7, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Wataru Kikuchi, Toshihide Aoshima, Kazutoshi Katayama, Tatsuo Mikami
  • Laminating magnetic cores for on-chip magnetic devices
    Patent number: 9564165
    Abstract: A laminating structure includes a first magnetic layer, a second magnetic layer, a first spacer disposed between the first and second magnetic layers and a second spacer disposed on the second magnetic layer.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: February 7, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert E. Fontana, Jr., William J. Gallagher, Philipp Herget, Eugene J. O'Sullivan, Lubomyr T. Romankiw, Naigang Wang, Bucknell C. Webb
  • Exchange decoupled data storage medium
    Patent number: 9564164
    Abstract: A magnetic data storage medium capable of storing data bits may be configured at least with a magnetic underlayer structure and a recording structure. The recording structure can have at least a first magnetic layer and a second magnetic layer with the first magnetic layer decoupled by being constructed of an alloy of cobalt, platinum, and a platinum group metal element.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: February 7, 2017
    Assignee: Seagate Technology LLC
    Inventors: Jai-Young Kim, Terry Lee Morkved
  • Lubricant compound for magnetic disk and magnetic disk
    Patent number: 9558778
    Abstract: A lubricant compound is contained in a lubrication layer of a magnetic disk in which at least a magnetic layer, a protective layer, and a lubrication layer are sequentially provided on a substrate, and the lubricant compound contains a component A represented by Chemical formula 1 and a component B represented by Chemical formula 2: wherein X in Chemical formula 1 represents OH wherein X in Chemical formula 2 represents OCH2CH(OH)CH2OH, and the lubricant compound further contains a component C made of a specific compound having a phosphezene ring in the structure thereof.
    Type: Grant
    Filed: March 27, 2010
    Date of Patent: January 31, 2017
    Assignee: WD Media (Singapore) Pte. Ltd.
    Inventors: Kota Suzuki, Koichi Shimokawa, Katsushi Hamakubo, Kae Itoh
  • Vertically and horizontally weakly coupled perpendicular small grain media
    Patent number: 9552837
    Abstract: In one general embodiment, a magnetic medium includes a recording layer having at least three exchange control layers each having a magnetic moment less than 100 emu/cc, and four magnetic layers separated from one another by the exchange control layers. An uppermost of the magnetic layers is doped with oxygen. In another general embodiment, a magnetic medium includes a recording layer having at least three exchange control layers and four magnetic layers separated from one another by the exchange control layers. An uppermost of the magnetic layers has an oxygen content of greater than 0.5 vol %. An average pitch of magnetic grains in a lowermost of the magnetic layers is 9 nm or less. A lowermost of the magnetic layers has an oxide content of at least 20 vol %.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: January 24, 2017
    Assignee: HGST Netherlands B.V.
    Inventors: Hoa V. Do, Sylvia H. Florez, Yoshihiro Ikeda, Kentaro Takano, Bruce D. Terris, Qing Zhu
  • Magnetic recording medium and magnetic recording/reproduction apparatus
    Patent number: 9548075
    Abstract: According to one embodiment, a perpendicular magnetic recording medium has an arrangement obtained by sequentially stacking a nonmagnetic substrate, a soft magnetic underlayer, a nonmagnetic seed layer containing silver grains having an fcc structure and an amorphous germanium grain boundary formed between the silver grains, a reaction barrier layer containing 90 at % or more of silver or aluminum and having a thickness of 2 nm or less, a nonmagnetic interlayer formed on the reaction barrier layer and made of ruthenium or a ruthenium alloy, and a perpendicular magnetic recording layer.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: January 17, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Takeshi Iwasaki
  • Magnetic recording medium
    Patent number: 9542967
    Abstract: There is provided a magnetic recording medium including a surface having a longitudinal direction and a lateral direction. An arithmetic average roughness Ra, a ratio PSDMD,short/PSDTD,short, and a ratio PSDMD,long/PSDTD,long on the surface satisfy Ra?3.0 nm, PSDMD,short/PSDTD,short?0.65, and 1.3?PSDMD,long/PSDTD,long?2.3, in which PSDMD,short is an average value of PSD values in a range from 0.15 ?m to 0.4 ?m in the longitudinal direction of the surface, PSDTD,short is an average value of PSD values in a range from 0.15 ?m to 0.4 ?m in the lateral direction of the surface, PSDMD,long is an average value of PSD values in a range from 0.4 ?m to 5.0 ?m in the longitudinal direction of the surface, and PSDTD,long is an average value of PSD values in a range from 0.4 ?m to 5.0 ?m in the lateral direction of the surface.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: January 10, 2017
    Assignee: Sony Corporation
    Inventors: Noboru Sekiguchi, Tomoe Ozaki, Junichi Tachibana
  • Magnetic recording medium
    Patent number: 9530444
    Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein the ferromagnetic powder is ferromagnetic hexagonal ferrite powder comprising 3 to 12 weight percent of Al, based on Al2O3 conversion, relative to 100 weight percent of a total weight of the powder, the magnetic layer further comprises abrasive, and a maximum plan view surface area of the abrasive as determined for a 4.3 ?m×6.3 ?m rectangular region of the magnetic layer by a scanning electron microscope is less than 0.06 percent relative to 100 percent of a total surface area of the region.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: December 27, 2016
    Assignee: FUJIFILM Corporation
    Inventor: Norihito Kasada
  • CNHfilm, deposition method, magnetic recording medium and method for manufacturing the same
    Patent number: 9524742
    Abstract: To provide a CxNyHz film of high density and a deposition method. One aspect of the present invention is a CxNyHz film formed on a substrate to be deposited, wherein x, y and z satisfy formulae (1) to (4) below: 0.4<x<0.7??(1) 0.01<y<0.5??(2) 0?z<0.3??(3) x+y+z=1.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: December 20, 2016
    Assignee: YOUTEC CO., LTD.
    Inventors: Haruhito Hayakawa, Kouji Abe, Keiichi Terashima, Yuuji Honda
  • Magnetostrictive film, magnetostrictive element, torque sensor, force sensor, pressure sensor, and manufacturing method therefor
    Patent number: 9506824
    Abstract: For providing a magnetostrictive film that can exhibit high magnetostrictive properties in the vicinity of zero magnetic field and their manufacturing methods, a magnetostrictive film thermal sprayed on an object under test includes a metallic glass film subjected to thermal processing at a temperature lower than the glass transition temperature and not lower than the Curie point, and shows a linearity between the magnetic field and the magnetostriction in at least a part of the magnetic field from ?15 kA/m to +15 kA/m (both inclusive).
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: November 29, 2016
    Assignee: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Yoshitsugu Motoe, Koji Nakashima, Tomohito Ishikawa, Masaharu Sugiyama, Takanori Igarashi, Hiroyuki Wakiwaka, Akihiro Makino, Akihisa Inoue
  • Method and material for protecting magnetic information storage media
    Patent number: 9478244
    Abstract: A method of protecting a magnetic information storage medium is described. The method includes fabricating a film over a surface of the magnetic information storage medium. The film includes an amorphous, uniform, homogeneous solid solution of carbon, hydrogen, silicon, and oxygen. A magnetic storage medium with such a protective film is described.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: October 25, 2016
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Robert W. Carpick, Kumar Sridharan
  • Magnetic recording medium for heat-assisted recording system and method for manufacturing same
    Patent number: 9478243
    Abstract: The magnetic recording medium for a heat-assisted recording system has a magnetic recording layer on a non-magnetic substrate and a protective layer on top of the magnetic recording layer. The protective layer includes a first lower protective layer on top of the magnetic recording layer, a first upper protective layer on the first lower protective layer, and a second protective layer on the first upper protective layer. The first lower protective layer is composed mainly of an element selected from the group consisting of Si, Al and Cu, and the first upper protective layer is a layer configured by an oxide of the material of the first lower protective layer.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: October 25, 2016
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Narumi Sato, Akiyasu Kumagai, Tomonori Katano, Katsumi Taniguchi
  • Perpendicular magnetic recording media having novel magnetic under-layer structure
    Patent number: 9472228
    Abstract: A magnetic medium for perpendicular magnetic data recording having improved corrosion characteristics and reduced surface roughness. The magnetic medium includes an under-layer and a perpendicular magnetic recording layer formed over the under-layer. The under-layer can be formed of MgO and has an oxygen concentration that is greater at the perpendicular magnetic recording layer than it is away from the perpendicular magnetic recording layer.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: October 18, 2016
    Assignee: HGST Netherlands B.V.
    Inventors: Akemi Hirotsune, Ikuko Takekuma, Hiroyuki Matsumoto, Oleksandr Mosendz
  • Perpendicular magnetic recording media and methods for producing the same
    Patent number: 9472227
    Abstract: [Problem] An object is to provide a perpendicular magnetic recording medium that can realize both improvement in crystal orientation and refinement of crystal grain size and can achieve a higher recording density and a higher SN ratio, and a method of manufacturing the same. [Solution] A perpendicular magnetic recording medium 100 of the present invention is a perpendicular magnetic recording medium 100 having a base plate 100, and a laminate film including a first ground layer 150a provided on the base plate 100, a second ground layer 150b provided on the first ground layer 150a, and a main recording layer 160 provided on the second ground layer 150b and containing a magnetic material having a granular structure, wherein the magnetic material which constitutes the main recording layer 160 contains a CoCrPt alloy, and a material which constitutes the second ground layer 150b contains an Ru—Co oxide alloy.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: October 18, 2016
    Assignee: WD Media (Singapore) Pte. Ltd.
    Inventors: Hi Shin, Iwao Okamoto
  • Magneto-electronic component, and method for the production thereof
    Patent number: 9431082
    Abstract: A magneto-electronic component, having one or more elongate elements of a magnetic material, electrically conductive contacts, at least one insulating thin layer, on which the one or more elongate elements of the magnetic material and the electrically conductive contacts are arranged, and an additional insulating thin layer structured and arranged to cover at least the one or more elongate elements and partially cover the electrically conductive contacts to form an arrangement. At least the one or more elongate elements is connected to the contacts and the contacts are connectable to a current source in an electrically conducting manner. The arrangement is jointly rolled-up to form a rolled-up arrangement having a rolled-up region. At least the electrically conductive contacts are partially located outside the rolled-up region of the rolled-up arrangement.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: August 30, 2016
    Assignee: LEIBNIZ-INSTITUT FUER FESTKOERPER-UND WERKSTOFFFORSCHUNG DRESDEN E.V.
    Inventors: Denys Makarov, Oliver G. Schmidt
  • Method of fabricating graded media
    Patent number: 9418692
    Abstract: A magnetic data storage medium includes an ion doped magnetic recording layer having a continuous grading of coercivity or anisotropy. The medium also includes an ion-doped overcoat having an ion density that is at a maximum substantially at the interface with the recording layer and has a continuous grading of ion density between the overcoat and the recording layer. The coercivity is at a minimum substantially at the interface.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: August 16, 2016
    Assignees: INTERNATIONAL BUSINESS MACHINES CORPORATION, NATIONAL UNIVERSITY OF SINGAPORE
    Inventors: Charanjit Singh Bhatia, Koashal Kishor Mani Pandey, Nikita Gaur, Siegfried L. Maurer, Ronald W. Nunes
  • Onset layer for perpendicular magnetic recording media
    Patent number: 9412404
    Abstract: A magnetic storage medium according to one embodiment includes a substrate; an onset layer formed above the substrate, the onset layer comprising ruthenium and titanium oxide; and a magnetic oxide layer formed directly on the onset layer. A method according to one embodiment includes sputtering using a target of ruthenium and titanium oxide for forming an onset layer above a substrate, the onset layer comprising ruthenium and titanium oxide; and forming a magnetic oxide layer directly on the onset layer. Additional systems and methods are also presented.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: August 9, 2016
    Assignee: HGST Netherlands B.V.
    Inventors: Xiaoping Bian, Jack Jyh-Kau Chang, Mark F. Mercado, Mohammad T. Mirzamaani, Kai Tang