Patents Examined by Kevin M. Bernatz
  • Patent number: 11373680
    Abstract: Provided are a magnetic tape comprising a magnetic layer containing a ferromagnetic powder and a binding agent on a non-magnetic support, in which the magnetic layer contains an oxide abrasive, an average particle diameter of the oxide abrasive obtained from a secondary ion image acquired by irradiating a surface of the magnetic layer with a focused ion beam is 0.04 ?m to 0.08 ?m, and an absolute value ?N of a difference between a refractive index Nxy measured with respect to an in-plane direction of the magnetic layer and a refractive index Nz measured with respect to a thickness direction of the magnetic layer is 0.25 to 0.40, and a magnetic recording and reproducing device including the magnetic tape.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: June 28, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Takahiro Iwamoto, Hidemasa Hosoda, Norihito Kasada, Takuto Kurokawa
  • Patent number: 11373791
    Abstract: A method of fabricating a shape-changeable magnetic member comprising a plurality of segments with each segment being able to be magnetized with a desired magnitude and orientation of magnetization, to a method of producing a shape changeable magnetic member composed of a plurality of segments and to a shape changeable magnetic member.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: June 28, 2022
    Inventors: Guo Zhan Lum, Zhou Ye, Metin Sitti
  • Patent number: 11367551
    Abstract: Large magnetic moment compositions are formed by stabilizing ternary or other alloys with a epitaxial control layer. Compositions that are unstable in bulk specimen are thus stabilized and exhibit magnetic moments that are greater that a Slater-Pauling limit. In one example, FexCoyMnz layers are produced on an MgO(001) substrate with an MgO surface serving to control the structure of the FexCoyMnz layers. Magnetizations greater than 3 Bohr magnetons are produced.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: June 21, 2022
    Assignees: Montana State University, The Regents of The University of California
    Inventors: Ryan J. Snow, Yves U. Idzerda, Elke Arenholz
  • Patent number: 11367461
    Abstract: The magnetic recording medium includes: a non-magnetic support; and a magnetic layer including ferromagnetic powder, in which a difference Safter?Sbefore between a spacing Safter measured on a surface of the magnetic layer by optical interferometry after methyl-ethyl-ketone cleaning and a spacing Sbefore measured on the surface of the magnetic layer by optical interferometry before methyl-ethyl-ketone cleaning is more than 0 nm and 15.0 nm or less, and the non-magnetic support is an aromatic polyamide support having a moisture absorption of 2.2% or less.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: June 21, 2022
    Assignee: FUJIFILM Corporation
    Inventor: Norihito Kasada
  • Patent number: 11366028
    Abstract: A stress sensor includes a stress detection layer including a laminated body including a first magnetic layer, a first non-magnetic layer, and a second magnetic layer that are laminated, wherein the first magnetic layer and the second magnetic layer have mutually different magnetoelastic coupling constants, such that a stress is detected by an electrical resistance dependent on a relative angle of magnetization between the first magnetic layer and the second magnetic layer varying depending on the stress externally applied.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: June 21, 2022
    Assignees: MURATA MANUFACTURING CO., LTD., THE UNIVERSITY OF TOKYO
    Inventors: Daichi Chiba, Akira Ando
  • Patent number: 11361792
    Abstract: The magnetic tape includes a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer includes one or more components selected from the group consisting of fatty acid and fatty acid amide, a C—H derived C concentration calculated from a C—H peak area ratio of C1s spectra obtained by X-ray photoelectron spectroscopic analysis performed on a surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is equal to or greater than 45 atom %, and an absolute value ?N of a difference between a refractive index Nxy measured regarding an in-plane direction of the magnetic layer and a refractive index Nz measured regarding a thickness direction of the magnetic layer is 0.25 to 0.40.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: June 14, 2022
    Assignee: FUJIFILM Corporation
    Inventor: Norihito Kasada
  • Patent number: 11361793
    Abstract: The magnetic tape includes a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which an absolute value ?N of a difference between a refractive index Nxy measured regarding an in-plane direction of the magnetic layer and a refractive index Nz measured regarding a thickness direction of the magnetic layer is 0.25 to 0.40, and a logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding a surface of the magnetic layer is equal to or smaller than 0.050.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: June 14, 2022
    Assignee: FUJIFILM Corporation
    Inventor: Norihito Kasada
  • Patent number: 11355147
    Abstract: The magnetic tape includes: a non-magnetic support; a magnetic layer that includes ferromagnetic powder on one surface side of the non-magnetic support; and a back coating layer that includes non-magnetic powder on the other surface side of the non-magnetic support, in which the ferromagnetic powder is ferromagnetic powder selected from the group consisting of hexagonal strontium ferrite powder and ?-iron oxide powder, and the number of protrusions having a height of 50 nm or more and less than 75 nm on a surface of the back coating layer is 700 pieces/6400 ?m2 or less.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: June 7, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Yoshihiro Sawayashiki, Norihito Kasada
  • Patent number: 11341995
    Abstract: An aluminum alloy sheet for a magnetic disk, a method for manufacturing same, and a magnetic disk using same. The aluminum alloy sheet is made of an aluminum alloy comprising 0.10 to 3.00 mass % of Fe, 0.003 to 1.000 mass % of Cu, and 0.005 to 1.000 mass % of Zn, with a balance of Al and unavoidable impurities, wherein a value obtained by dividing a difference in an area ratio (%) of second phase particles between a region (A) and a region (B) by an average value of area ratios (%) of second phase particles in the regions (A) and (B) is 0.05 or less, the region (A) being a region from a sheet thickness center plane to a front surface of the sheet, and the region (B) being a region from the sheet thickness center plane to a rear surface of the plate.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: May 24, 2022
    Assignees: UACJ CORPORATION, FURUKAWA ELECTRIC CO.. LTD.
    Inventors: Kotaro Kitawaki, Yu Igarashi, Keisuke Kamiya, Yu Matsui, Makoto Yonemitsu, Ryo Sakamoto, Hideyuki Hatakeyama, Hiroki Ota
  • Patent number: 11337345
    Abstract: Provided are a magnetic field shield sheet for a wireless charger, a method of manufacturing the sheet, and a receiver for the wireless charger by using the sheet. The sheet includes at least one layer thin magnetic sheet made of an amorphous ribbon separated into a plurality of fine pieces; a protective film that is adhered on one surface of the thin magnetic sheet via a first adhesive layer provided on one side of the protective film; and a double-sided tape that is adhered on the other surface of the thin magnetic sheet via a second adhesive layer provided on one side of the double-sided adhesive tape, wherein gaps among the plurality of fine pieces are filled by some parts of the first and second adhesive layers, to thereby isolate the plurality of fine pieces.
    Type: Grant
    Filed: February 25, 2021
    Date of Patent: May 17, 2022
    Assignee: VIRGINIA WIRELESS AND STREAMING TECHNOLOGIES LLC
    Inventors: Dong Hoon Lee, Kil Jae Jang
  • Patent number: 11328850
    Abstract: A magnetic film includes one or more magnetically conductive layers. Each magnetically conductive layer is cracked to form a plurality of first through-cracks defining a plurality of magnetically conductive segments. The first through-cracks extend along a first direction and form a first regular pattern along an orthogonal second direction at a first pitch P1, such that a Fourier transform of the first regular pattern has a first peak along the second direction at a first spatial frequency corresponding to the first pitch P1. The first through-cracks have an average length L1 along the first direction. L1/P1 is greater than or equal to 5.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: May 10, 2022
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Jinwook Kim, Seong-Woo Woo, Jung Ju Suh, Matthew R.C. Atkinson
  • Patent number: 11326900
    Abstract: A positioning device for a machine tool includes a substrate upon which a printing medium is deposited. The substrate has a longitudinal dimension that is longer than the transverse direction of the substrate. The printing medium includes magnetic or magnetizable particles, and the substrate is nonmagnetic. A scale is formed by first regions of the printing medium on the substrate and by second regions without the printing medium between adjacent first regions. The first regions are spaced apart in the longitudinal direction on the substrate. The printing medium is printed within the first regions on the substrate such that the printing medium is thinner in the interior of the first regions and thicker at the edges of the first regions. The location of the positioning device is determined by applying a measuring magnetic field and by detecting a resulting magnetic field emanating from a particular first region on the scale.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: May 10, 2022
    Assignee: Bogen Magnetics GmbH
    Inventor: Torsten Becker
  • Patent number: 11315594
    Abstract: A magnetic recording medium is provided and includes a layer structure including a magnetic layer, a non-magnetic layer, and a base layer in this order, in which an average thickness tT of the magnetic recording medium is 3.5 ?m?tT?5.3 ?m, a dimensional variation ?w in a width direction of the magnetic recording medium to tension change in a longitudinal direction of the magnetic recording medium is 700 ppm/N??w?2000 ppm/N, and an average thickness tn of the non-magnetic layer is tn?1.0 ?m.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: April 26, 2022
    Assignee: Sony Corporation
    Inventors: Masaru Terakawa, Minoru Yamaga
  • Patent number: 11312631
    Abstract: An aligned film having first and second faces opposed to each other, the aligned film having (a) a plurality of layers aligned non-parallel to the first and second faces between the faces of the aligned film, each layer having a crystal lattice represented by: Mn+1Xn (wherein M is at least one metal of Group 3, 4, 5, 6, or 7; X is a carbon atom, a nitrogen atom, or a combination thereof; and n is 1, 2, or 3), each X is positioned within an octahedral array of M, and at least one of two opposing surfaces of each said layer have at least one modifier or terminal T selected from a hydroxy group, a fluorine atom, an oxygen atom, and a hydrogen atom; and (b) magnetic nanoparticles carried on a layer surface and/or between two adjacent layers of the plurality of layers.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: April 26, 2022
    Assignees: MURATA MANUFACTURING CO., LTD., DREXEL UNIVERSITY
    Inventors: Yoshito Soda, Takeshi Torita, Yury Gogotsi, Babak Anasori, Christine B. Hatter
  • Patent number: 11309115
    Abstract: A magnetoresistance effect element includes a first ferromagnetic layer, a second ferromagnetic layer, and a nonmagnetic spacer layer between the first ferromagnetic layer and the second ferromagnetic layer, in which at least one of the first ferromagnetic layer and the second ferromagnetic layer contains a metal compound having a half-Heusler type crystal structure, the metal compound contains a functional material, and X atoms, Y atoms, and Z atoms which form a unit lattice of the half-Heusler type crystal structure, and the functional material has an atomic number lower than an atomic number of any of the X atoms, the Y atoms, and the Z atoms.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: April 19, 2022
    Assignee: TDK CORPORATION
    Inventor: Katsuyuki Nakada
  • Patent number: 11309107
    Abstract: Disclosed herein is a permanent magnet comprising: a plurality of aligned iron nitride nanoparticles wherein the iron nitride nanoparticles include ??-Fe16N2 phase domains; wherein a ratio of integrated intensities of an ??-Fe16N2 (004) x-ray diffraction peak to an ??-??-Fe16N2 (202) x-ray diffraction peak for the aligned iron nitride nanoparticles is greater than at least 7%, wherein the diffraction vector is parallel to alignment direction, and wherein the iron nitride nanoparticles exhibit a squareness measured parallel to the alignment direction that is greater than a squareness measured perpendicular to the alignment direction.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: April 19, 2022
    Assignee: NIRON MAGNETICS, INC.
    Inventors: Francis Johnson, Richard W. Greger, John M. Larson, Yiming Wu, Fan Zhang, Kathryn Sara Damien
  • Patent number: 11302354
    Abstract: The average thickness tT of a magnetic recording medium meets the requirement that tT?5.5 [?m], and the dimensional change amount ?w in the width direction of the magnetic recording medium with respect to the tension change in the longitudinal direction of the magnetic recording medium meets the requirement that 700 ppm/N??w.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: April 12, 2022
    Assignee: Sony Corporation
    Inventors: Noboru Sekiguchi, Minoru Yamaga
  • Patent number: 11302355
    Abstract: A magnetic recording medium is provided and includes a substrate; and a magnetic layer provided over the substrate, wherein (wmax?wmin)/wmin?400 [ppm] . . . (1) where wmax and wmin are respectively maximum and minimum of average values of width corresponding to samples of magnetic recording medium measured after the samples are stored for two hours under storage conditions (a loading tension in the longitudinal direction of the magnetic recording medium, a temperature and a relative humidity) for each of the samples, and a width of a sample of the magnetic recording medium at 25° C. and 50% relative humidity and without loading is ½ inch, magnetic recording medium has Young's modulus of less than 8.0 GPa in a longitudinal direction, and 4.0?TB/(TA?TB) . . . (2) where TA is average thickness of magnetic recording medium and TB is average thickness of substrate.
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: April 12, 2022
    Assignee: Sony Corporation
    Inventors: Minoru Yamaga, Noboru Sekiguchi
  • Patent number: 11302466
    Abstract: A multilayer coil electronic component having improved inductance L, Q, and strength, and which has an element in which a coil conductor and a magnetic element body are stacked. The magnetic element body includes soft magnetic metal particles and a resin. The resin fills a space between the soft magnetic metal particles. Each of soft magnetic metal particles has a soft magnetic metal particle core and an oxide film covering the soft magnetic metal particle core. A layer of the oxide film contacting the soft magnetic metal particle core is made of an oxide including Si.
    Type: Grant
    Filed: November 23, 2018
    Date of Patent: April 12, 2022
    Assignee: TDK CORPORATION
    Inventors: Takashi Suzuki, Hidekazu Sato, Yusuke Nagai, Kouichi Kakuda, Kunihiko Kawasaki, Shinichi Kondo, Yuya Ishima, Shinichi Sato, Masaki Takahashi, Takashi Endo
  • Patent number: 11302357
    Abstract: The magnetic recording medium includes: a non-magnetic support; a magnetic layer that includes ferromagnetic powder on one surface side of the non-magnetic support; and a back coating layer that includes non-magnetic powder on the other surface side of the non-magnetic support, in which a difference between a spacing measured on a surface of the back coating layer by optical interferometry under a pressure of 0.5 atm after n-hexane cleaning and a spacing measured on the surface of the back coating layer by optical interferometry under a pressure of 13.5 atm after n-hexane cleaning is 12 nm or more.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: April 12, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Naoki Sano, Takuto Kurokawa, Eiki Ozawa, Norihito Kasada, Megumi Nakano