Patents Examined by Kevin M. Bernatz
  • Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium, glass spacer for magnetic recording and reproducing apparatus, and magnetic recording and reproducing apparatus
    Patent number: 11688424
    Abstract: Provided is a glass for a magnetic recording medium substrate, which is an amorphous glass, in which an SiO2 content is in a range of 54 mol % or more and 62 mol % or less, an MgO content is in a range of 15 mol % or more and 28 mol % or less, an Li2O content is in a range of 0.2 mol % or more, and an Na2O content is in a range of 5 mol % or less.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: June 27, 2023
    Assignee: HOYA CORPORATION
    Inventors: Koichi Sato, Kazuaki Hashimoto
  • Oxide interface displaying electronically controllable ferromagnetism
    Patent number: 11688539
    Abstract: A structure includes an electronically controllable ferromagnetic oxide structure that includes at least three layers. The first layer comprises STO. The second layer has a thickness of at least about 3 unit cells, said thickness being in a direction substantially perpendicular to the interface between the first and second layers. The third layer is in contact with either the first layer or the second layer or both, and is capable of altering the charge carrier density at the interface between the first layer and the second layer. The interface between the first and second layers is capable of exhibiting electronically controlled ferromagnetism.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: June 27, 2023
    Assignee: University of Pittsburgh—Of the Commonwealth System of Higher Education
    Inventors: Jeremy Levy, Feng Bi, Patrick R. Irvin
  • Magnetic-disk substrate, magnetic disk, and magnetic-disk drive device
    Patent number: 11682424
    Abstract: A magnetic-disk substrate has a pair of main surfaces, and an arithmetic average roughness Ra of each of the main surfaces is 0.11 nm or less. The arithmetic average roughness Ra is a value obtained through measurement using an atomic force microscope provided with a probe having a probe tip provided with a carbon nanofiber rod-shaped member. The magnetic-disk substrate is made of glass or aluminum alloy.
    Type: Grant
    Filed: July 26, 2021
    Date of Patent: June 20, 2023
    Assignee: HOYA CORPORATION
    Inventors: Masanobu Itaya, Kinobu Osakabe
  • Base member, spindle motor, and hard disk drive device
    Patent number: 11682431
    Abstract: A base member serves as a part of a housing of a hard disk drive device. The base member includes a base body being a cast product, a first machined surface obtained by machining a portion formed with a convex portion of the base body, and a coating film covering a surface of the base body. The base body includes a coated surface obtained by covering the first machined surface with the coating film, and a second machined portion obtained by machining a part of the base body other than the first machined surface.
    Type: Grant
    Filed: August 16, 2021
    Date of Patent: June 20, 2023
    Assignee: MINEBEA MITSUMI Inc.
    Inventors: Hideaki Showa, Kazuo Sato, Junichi Nakane
  • Seed layer for spin torque oscillator in microwave assisted magnetic recording device
    Patent number: 11682420
    Abstract: Certain embodiments are directed to a spin torque oscillator (STO) device in a microwave assisted magnetic recording (MAMR) device. The magnetic recording head includes a seed layer, a spin polarization layer over the seed layer, a spacer layer over the spin polarization layer, and a field generation layer is over the spacer layer. In one embodiment, the seed layer comprises a tantalum alloy layer. In another embodiment, the seed layer comprises a template layer and a damping reduction layer over the template layer. In yet another embodiment, the seed layer comprises a texture reset layer, a template layer on the texture reset layer, and a damping reduction layer on the template layer.
    Type: Grant
    Filed: August 31, 2021
    Date of Patent: June 20, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: James Mac Freitag, Zheng Gao, Susumu Okamura, Brian R. York
  • Material having both negative spin polarization and negative anisotropy
    Patent number: 11683993
    Abstract: Aspects of the present disclosure generally relate to a spintronic device for use in a magnetic media drive, a magnetoresistive random access memory device, a magnetic sensor, or a magnetic recording write head. The spintronic device comprises a multilayer structure having a negative anisotropic field and a negative spin polarization. The multilayer structure comprises a plurality of layers, each layer of the plurality of layers comprising a first sublayer comprising Fe and a second sublayer comprising Co. At least one of the first sublayer and the second sublayer comprises one or more of Cr, V, and Ti. The first and second sublayers are alternating. The negative anisotropic field of the multilayer structure is between about ?0.5 T to about ?0.8 T, and an effective magnetization of the multilayer structure is between about 2.4 T to about 2.8 T.
    Type: Grant
    Filed: March 23, 2021
    Date of Patent: June 20, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Susumu Okamura, Christian Kaiser, James Mac Freitag
  • High frequency magnetic films, method of manufacture, and uses thereof
    Patent number: 11682509
    Abstract: A multilayer film includes a substrate; a first magnetic layer disposed on the substrate and a second magnetic layer disposed on the first magnetic layer. The first magnetic layer includes Fe(50-80)N(10-20)B(1-20)M(0-10), wherein M is Si, Ta, Zr, Ti, Co, or a combination thereof. The second magnetic layer includes Fe(50-90)N(10-50) or Fe(60-90)N(1-10)Ta(5-30). The multilayer magnetic film has, over a frequency range of 50 MHz to 10 GHz, a magnetic permeability of greater than or equal to 1800 over a selected frequency band in the frequency range; a magnetic loss tangent of less than or equal to 0.3 over a selected frequency band in the frequency range; and a cutoff frequency of greater than or equal to 1 GHz, or greater than or equal to 2 GHz.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: June 20, 2023
    Assignee: ROGERS CORPORATION
    Inventors: Yajie Chen, Xiaoyu Zhang, Li Zhang, Yuanyuan Xing
  • Magnetic device
    Patent number: 11676751
    Abstract: A magnetic device is equipped with a stacked body including a first ferromagnetic layer, a second ferromagnetic layer, and a non-magnetic layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer; and an insulator which covers at least a part of side surfaces of the stacked body, in which the insulator has a space outside the side surface of the stacked body.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: June 13, 2023
    Assignee: TDK CORPORATION
    Inventors: Zhenyao Tang, Yohei Shiokawa, Tomoyuki Sasaki
  • Magnetic recording medium, magnetic recording and reproducing device and composition for magnetic recording medium including polyalkyleneimine compound
    Patent number: 11670334
    Abstract: The magnetic recording medium includes: a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer further includes a compound including a polyalkyleneimine chain and a vinyl polymer chain. The composition for a magnetic recording medium includes: ferromagnetic powder; and a compound including a polyalkyleneimine chain and a vinyl polymer chain.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: June 6, 2023
    Assignee: FUJIFILM Corporation
    Inventors: Wataru Kikuchi, Masatoshi Yumoto, Takashi Imai
  • Winding-type coil component and method for manufacturing same, as well as circuit board carrying winding-type coil component
    Patent number: 11657936
    Abstract: A winding-type coil component whose core member is constituted by: soft magnetic alloy grains 210 containing Fe, Si, and at least one of Cr and Al, as constituent elements; and an oxide layer 220 which is formed around the soft magnetic alloy grains to bond the soft magnetic alloy grains together and contains Si, as well as at least one of Cr and Al, as constituent elements, and whose content of Si based on mass is higher than the total content of Cr and Al. The winding-type coil component has high mechanical strength.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: May 23, 2023
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Atsushi Tanada, Toshimasa Suzuki
  • Magnetic composite sheet and coil component
    Patent number: 11657950
    Abstract: A coil component includes a body and a coil portion embedded in the body, wherein the body comprises a first magnetic metal powder particle comprising a core represented by Formula 1 below, and an oxide film comprising at least one of silicon (Si) and chromium (Cr) and formed on a surface of the core, a second magnetic metal powder particle having a larger diameter than the first magnetic metal powder particle, and a third magnetic metal powder particle having a larger diameter than the second magnetic metal powder particle: FeaSibCrc??[Formula 1] where 3 atom %?b?6 atom %, 2.65 atom %?c?3.65 atom %, and a+b+C=100.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: May 23, 2023
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jong Ok Jeon, Jeong Ho Lim, Il Jin Park, Soon Kwang Kwon, Gwang Hwan Hwang
  • Mn—Zn ferrite particles, resin molded body, soft magnetic mixed powder, and magnetic core
    Patent number: 11651881
    Abstract: Mn—Zn ferrite particles according to the present invention contain 44-60% by mass of Fe, 10-16% by mass of Mn and 1-11% by mass of Zn. The ferrite particles are single crystal bodies having an average particle diameter of 1-2,000 nm, and have polyhedral particle shapes, while having an average sphericity of 0.85 or more but less than 0.95.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: May 16, 2023
    Assignee: POWDERTECH CO., LTD.
    Inventors: Takashi Kojima, Kazutaka Ishii, Takao Sugiura, Tetsuya Igarashi, Koji Aga
  • Fluoropolyether compound, lubricant using same and usage thereof
    Patent number: 11651789
    Abstract: An object of an aspect of the present invention is to provide: a lubricant excellent in adsorbability on the surface of a magnetic disk and in contamination resistance; and a magnetic disk which uses the lubricant and which is excellent in durability. The lubricant in accordance with an aspect of the present invention contains a fluoropolyether compound having, at a terminal thereof, a hydroxyalkenyl group or a hydroxyalkynyl group.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: May 16, 2023
    Assignee: MORESCO CORPORATION
    Inventors: Akinori Kimura, Tsuyoshi Shimizu
  • Composite particle, core, and inductor element
    Patent number: 11651880
    Abstract: A composite particle includes a large particle and binder particles. The large particle has a particle size of 10 ?m to 50 ?m. The binder particles are attached on the large particle and each have a particle size smaller than that of the large particle.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: May 16, 2023
    Assignee: TDK CORPORATION
    Inventor: Yasuhide Yamashita
  • Magnetic particle and method
    Patent number: 11640865
    Abstract: A magnetic particle (30, 70) has a layered structure (6, 56) between a top surface of the particle and an opposed bottom surface of the particle. Layers of the structure include one or more nonmagnetic layer(s) and one or more magnetized layer(s). The ratio of a lateral dimension of the one or more magnetized layers to the aggregate thickness of the magnetized layer or layers is greater than 500. A plurality of such magnetic particles (30, 70) can be functionalised and marked with readable codes (16, 66) corresponding to the functionalisation, for use for performing assays such as bioassays.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: May 2, 2023
    Assignee: CAMBRIDGE ENTERPRISE LIMITED
    Inventors: Jeroen Verheyen, Tarun Vemulkar, Russell Cowburn
  • Large area type complex magnetic field shielding sheet and wireless power transfer module including the same
    Patent number: 11631532
    Abstract: Provided are a large area type complex magnetic field shielding sheet and a wireless power transfer module including the same. A large area type complex magnetic field shielding sheet wherein at least one of an overall width, an overall length, and a diameter is 100 mm or more may include a main shielding layer arranged so that a plurality of ferrite block bodies each having a predetermined area are adjacent to each other, and an auxiliary shielding layer formed of at least one magnetic sheet having a predetermined area and laminated on the main shielding layer through an adhesive layer, wherein a boundary region between two ferrite block bodies disposed to be adjacent each other is disposed to be located in an inner region of the magnetic sheet and thus a magnetic field which leaks into a gap between the two ferrite block bodies is blocked by the magnetic sheet.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: April 18, 2023
    Assignee: Amosense Co., Ltd.
    Inventors: Chol Han Kim, Kil Jae Jang
  • Magnetic core
    Patent number: 11631519
    Abstract: Disclosed is a magnetic core having improved reliability. The magnetic core includes 37 to 44 mol % of manganese (Mn), 9 to 16 mol % of zinc (Zn), 42 to 52 mol % of iron (Fe), a magnetic additive, and a non-magnetic additive, wherein the magnetic core has a permeability of 2,900 or more and a core loss of 500 mW/cm3 or less.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: April 18, 2023
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Hyun Ji Lee, Deok Hyeon Kim, Sang Won Lee
  • Composite magnetic material and inductor using the same
    Patent number: 11631513
    Abstract: A magnetic material and an inductor capable of attaining both higher magnetic permeability and improved DC superposition characteristics. A composite magnetic material contains metal magnetic particles, in which the metal magnetic particles include first particles having a median diameter D50 of 1.3 ?m or more and 5.0 ?m or less (i.e., from 1.3 ?m to 5.0 ?m), and second particles having a median diameter D50 larger than the first particles. The first and second particles each include a core portion made of a metal magnetic material, and an insulating film provided on a surface of the core portion. The insulating film of the second particles has an average thickness of 40 nm or more and 100 nm or less (i.e., from 40 nm to 100 nm). The insulating film of the first particles has an average thickness smaller than that of the insulating film of the second particles.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: April 18, 2023
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takuya Ishida, Mikito Sugiyama, Mitsuru Odahara, Hideaki Ooi, Koichi Ida
  • Magnetic core, inductor and module including inductor
    Patent number: 11610710
    Abstract: A module includes a circuit board and an inductor. The circuit board has a facing surface and a rear surface which are located at opposite sides to each other in an up-down direction. The inductor has a magnetic core and a coil. The magnetic core is made of a soft magnetic metal material. The magnetic core has a facing surface and a radiating surface which are located at opposite sides to each other in the up-down direction. The facing surface of the magnetic core is arranged to face the facing surface of the circuit board in the up-down direction. The radiating surface of the magnetic core is arranged to be radiatable heat outward. The coil has a coil portion and a connection end. The coil portion winds, at least in part, the magnetic core. The connection end is connected to the facing surface of the circuit board.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: March 21, 2023
    Assignee: TOKIN CORPORATION
    Inventors: Kenichi Chatani, Kenji Ikeda, Toshinori Tsuda
  • Magnetic film
    Patent number: 11605499
    Abstract: A magnetic film includes iron and copper distributed between opposing first and second major surfaces of the magnetic film. The copper has a first atomic concentration C1 at a first depth d1 from the first major surface and a peak second atomic concentration C2 at a second depth d2 from the first major surface, d2>d1, C2/C1?5.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: March 14, 2023
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Seong-Woo Woo, Jung Ju Suh, Charles L. Bruzzone, Jennifer J. Sokol, Sergei A. Manuilov