Patents Examined by Kevin M. Bernatz
  • 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
  • Inductor element
    Patent number: 11605490
    Abstract: The present invention is an inductor element having a conductor wound in a coil form, and a core part surrounding the coil and including a magnetic powder and a resin. The core part includes a top board part and a bottom board part respectively covering both ends of the coil, and an outer circumference part positioned at an outer circumference side of the coil, and a resin content of the outer circumference part is larger than a resin content of the top board part and also larger than a resin content of the bottom board part.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: March 14, 2023
    Assignee: TDK CORPORATION
    Inventors: Yasuhide Yamashita, Chiomi Sato
  • Magnetic base body containing soft magnetic metal particles and electronic component including the same
    Patent number: 11594354
    Abstract: A magnetic base body according to one embodiment of the invention includes soft magnetic metal particles that have an insulating film on their surfaces. In a Raman spectrum obtained by observing light scattered when the magnetic base body is irradiated with an excitation laser with a wavelength of 488 nm, a peak intensity ratio. that is defined as a ratio of the peak intensity of a first peak existing at around a wave number of 712 cm?1 to the peak intensity of a peak existing at around a wave number of 1320 cm?1, is 1 to 70.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: February 28, 2023
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Takashi Nakajima, Shunta Ishiwata
  • Magnetic-disk substrate and magnetic disk
    Patent number: 11587585
    Abstract: A magnetic-disk substrate has an average value of squares of inclinations that is 0.0025 or less, and a frequency at which squares of inclinations are 0.004 or more is 15% or less, in a case where samples of inclinations on a main surface are obtained at intervals of 10 nm. The main surface is configured to receive at least a magnetic recording layer thereon. The magnetic-disk substrate includes an outer circumferential end portion and an inner circumferential end portion, and the outer circumferential end portion and the inner circumferential end portion have chamfered portions.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: February 21, 2023
    Assignees: HOYA CORPORATION, HOYA GLASS DISK VIETNAM II LTD.
    Inventors: Masanobu Itaya, Kinobu Osakabe, Toshio Takizawa
  • Magnetic powder and coil component comprising the same
    Patent number: 11581114
    Abstract: A magnetic powder contains a magnetic metal particle comprising iron (Fe) and an insulating coating layer disposed on a surface of the magnetic metal particle and comprising tin (Sn), phosphorous (P) and oxygen (O), and a coil component contains such a magnetic powder.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: February 14, 2023
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Il Jin Park, Jun Sung Lee, Joong Won Park, Gwang Hwan Hwang, Soon Kwang Kwon
  • Magnetic tape having characterized magnetic layer and magnetic recording and reproducing device
    Patent number: 11581015
    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: July 28, 2021
    Date of Patent: February 14, 2023
    Assignee: FUJIFILM Corporation
    Inventor: Norihito Kasada