Patents Examined by Craig A. Renner
  • Patent number: 11967348
    Abstract: This magnetoresistance effect element includes a first ferromagnetic layer, a second ferromagnetic layer, and a nonmagnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer. At least one of the first ferromagnetic layer and the second ferromagnetic layer has an alloy obtained by adding an additive element to a Heusler alloy. The additive element is any one or more elements selected from the group consisting of H, He, N, O, F, Ne, P, Cl, Ar, Kr, and Xe.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: April 23, 2024
    Assignee: TDK CORPORATION
    Inventors: Katsuyuki Nakada, Kazuumi Inubushi, Shinto Ichikawa
  • Patent number: 11961542
    Abstract: Various illustrative aspects are directed to a data storage device comprising a slider with a resistive temperature detector with a first resistance, a resistance detection circuit electrically coupled to the first resistance and comprising a low and high frequency path corresponding to a DC and AC mode, respectively, and one or more processing devices configured to: bias the first resistance with a voltage bias, where the first resistance is coupled to a first and second amplifier, control a pulse generator to add a bias pulse on the HF path to generate a HF resistance detection signal, where the second amplifier is biased using the voltage bias and the bias pulse, control a clock to chop a LF signal at the first amplifier on the LF path, demodulate the chopped LF signal to generate a LF resistance detection signal, and concurrently process the HF and LF resistance detection signals.
    Type: Grant
    Filed: August 9, 2022
    Date of Patent: April 16, 2024
    Assignee: Western Digital Technologies, Inc.
    Inventors: John Contreras, Joey M. Poss, Ronald Chang, Bernhard E. Knigge
  • Patent number: 11955148
    Abstract: A cartridge includes a tape-shaped nonwoven fabric, a reel on which the tape-shaped nonwoven fabric is wound, and a case that accommodates the reel. A basis weight of the tape-shaped nonwoven fabric is equal to or less than 25 c/m2 and an average fiber diameter of the tape-shaped nonwoven fabric is equal to or less than 11 ?m.
    Type: Grant
    Filed: December 25, 2020
    Date of Patent: April 9, 2024
    Assignee: SONY GROUP CORPORATION
    Inventors: Eiji Nakashio, Takanobu Iwama
  • Patent number: 11948609
    Abstract: Provided are at least two bearings; an outer shaft having a tubular shape and supporting the bearings at an outer circumferential surface; and an inner shaft housed in the outer shaft with one end extending out from one opening part of the outer shaft. The inner shaft includes a male thread part at least at a portion extending out from the outer shaft.
    Type: Grant
    Filed: April 10, 2023
    Date of Patent: April 2, 2024
    Assignee: MINEBEA MITSUMI Inc.
    Inventor: Shinya Ohnuma
  • Patent number: 11948600
    Abstract: According to one embodiment, a disk clamp includes a disk-shaped main body including a central axis line, an annular mounting groove provided in a first surface of the main body, in which a wire for unbalance adjustment is mountable, a plurality of through-holes formed through the main body and spaced apart from each other equally in a circumferential direction around the central axis line, through each of which a fixing screw is insertable, and a plurality of female threaded holes formed on the first surface of the main body and spaced apart from each other equally in the circumferential direction, through each of which an adjustment screw for balancing adjustment is screwable.
    Type: Grant
    Filed: August 24, 2022
    Date of Patent: April 2, 2024
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventor: Manabu Uehara
  • Patent number: 11942124
    Abstract: A slider may include a first side-edge surface, a second side-edge surface, and an air-bearing surface (ABS) comprising: a first side cavity adjacent to the first side-edge surface, and a first island side blocker situated at a mouth of the first side cavity, wherein: a first outer surface of the first island side blocker forms a portion of the first side-edge surface, a second outer surface of the first island side blocker is recessed from the first side-edge surface, a first side opening is situated on a leading side of the first island side blocker, and a second side opening is situated on a trailing side of the first island side blocker.
    Type: Grant
    Filed: July 11, 2023
    Date of Patent: March 26, 2024
    Assignee: Western Digital Technologies, Inc.
    Inventors: Yong Hu, Lee K. Dorius, Hung V. Nguyen, Taichi Nakamura
  • Patent number: 11935566
    Abstract: According to an embodiment, on a first track of a magnetic disk, a plurality of first sectors in each of which a data segment is stored, and a second sector in which a parity for first error correction is stored are arranged in this order from a first position. A controller executes a first operation of sequentially reading a first data segment from each of the plurality of first sectors, and storing a group of the read first data segments in a buffer memory. The controller obtains a first parity from the group of the read first data segments. The controller starts a second operation of writing each first data segment stored in the buffer memory, to a first sector that is a read source among the plurality of first sectors, and writing the first parity to the second sector, before the magnetic head reaches the first position.
    Type: Grant
    Filed: September 6, 2022
    Date of Patent: March 19, 2024
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventor: Syosuke Maruyama
  • Patent number: 11929104
    Abstract: A recording head has a magnetic write transducer having a first crosstrack width operable to write a single track of data at a time to a magnetic disk. The recording head also has a magnetic erase transducer separate from the magnetic write transducer. The magnetic erase transducer has a second crosstrack width operable to simultaneously erase multiple tracks of data from the magnetic disk.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: March 12, 2024
    Assignee: Seagate Technology LLC
    Inventors: Lihong Zhang, Xiong Liu
  • Patent number: 11922971
    Abstract: A hub includes a hub body around which a magnetic tape is wound, and a noncontact storage medium provided in the hub body, in which the noncontact storage medium stores hub specification information for specifying the hub body, and the hub specification information is associated with hub change characteristic information indicating a change characteristic of the hub body.
    Type: Grant
    Filed: July 26, 2022
    Date of Patent: March 5, 2024
    Assignee: FUJIFILM CORPORATION
    Inventor: Eiichiro Kataoka
  • Patent number: 11915726
    Abstract: A recording device that generates a hierarchy of groups for classifying each of a plurality of data to be recorded from information on each of the data, and performs a control of recording, for each group of a highest hierarchy, the plurality of data included in the group of the highest hierarchy on a recording medium in a recording order corresponding to an order from the top to the bottom of the hierarchy.
    Type: Grant
    Filed: March 24, 2021
    Date of Patent: February 27, 2024
    Assignee: FUJIFILM CORPORATION
    Inventor: Kentaro Miyamoto
  • Patent number: 11908497
    Abstract: A hard disk drive flexure assembly includes a base layer, a conductive layer, a plurality of electrical pads over the conductive layer, and a sidewall layer including sidewalls on each side of and extending higher than a corresponding electrical pad. Pre-solder bumps are formed between the sidewalls and over each pad. Use of sidewalls prevents the pre-solder bumps from undesirably bridging to an adjacent electrical pad and forming a short circuit, which might otherwise cause head-gimbal assembly (HGA) manufacturing failures and consequent increased cost. These techniques are especially relevant with narrow, high-density, small pitch electrical pads.
    Type: Grant
    Filed: March 29, 2022
    Date of Patent: February 20, 2024
    Assignee: Western Digital Technologies, Inc.
    Inventors: Irizo Naniwa, Kenichi Murata
  • Patent number: 11900973
    Abstract: According to an embodiment, a disk drive suspension includes a load beam, a flexure including a tongue on which a slider is mounted and an outrigger connected to the tongue, and overlapping the load beam, and a damper material attached to the load beam and the outrigger. Further, the damper material has a single-layer structure of a viscoelastic material.
    Type: Grant
    Filed: December 19, 2022
    Date of Patent: February 13, 2024
    Assignee: NHK SPRING CO., LTD.
    Inventors: Hiroshi Nakayama, Masao Hanya, Tatsuhiko Nishida
  • Patent number: 11887636
    Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. In a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 60 nm or more and less than 120 nm is 8000 or more and 30000 or less. Standard deviation ? of the number of the bright regions in a width direction of the surface of the magnetic layer is 2000 or less.
    Type: Grant
    Filed: April 11, 2023
    Date of Patent: January 30, 2024
    Assignee: FUJIFILM Corporation
    Inventors: Norihito Kasada, Yuto Murata, Nagisa Yamasaki
  • Patent number: 11887625
    Abstract: A tape drive includes a tape transport assembly, the tape transport assembly including a drive member, the drive member of the tape transport assembly configured to displace tape media in the tape drive; and a tape roller assembly, the tape roller assembly including a roller member, the roller member having one or more slanted grooves or protrusions formed in an outer surface of the roller member, the roller member configured to support and/or guide the tape media as the tape media is displaced by the tape transport assembly, the one or more slanted grooves or protrusions of the roller member configured to burnish and/or clean the tape media so as to prevent damage to a tape head, and the one or more slanted grooves or protrusions of the roller member being angled so as to prevent the tape media from sliding in an axial direction of the roller member.
    Type: Grant
    Filed: January 14, 2023
    Date of Patent: January 30, 2024
    Assignee: MagStor Inc.
    Inventor: George A Saliba
  • Patent number: 11887635
    Abstract: A read head includes a permanent magnet (PM) layer formed up to 100 nm behind a free layer where PM layer magnetization may be initialized in a direction that adjusts free layer (FL) bias point, and shifts sensor asymmetry (Asym) closer to 0% for individual heads at slider or Head Gimbal Assembly level to provide a significant improvement in device yield. Asym is adjusted using different initialization schemes and initialization directions. With individual heads, initialization direction is selected based on a prior measurement of asymmetry. The PM layer is CoPt or CoCrPt and has coercivity from 500 Oersted to 1000 Oersted. The PM layer may have a width equal to the FL, or in another embodiment, the PM layer adjoins a backside of the top shield and has a width equal to or greater than that of the FL.
    Type: Grant
    Filed: July 1, 2022
    Date of Patent: January 30, 2024
    Assignee: Headway Technologies, Inc.
    Inventors: Glen Garfunkel, Yan Wu, Wenyu Chen, Kunliang Zhang, Min Li, Shohei Kawasaki
  • Patent number: 11881237
    Abstract: The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head having a current flow in a cross-track direction around a main pole. The magnetic recording device comprises a main pole disposed between a trailing shield, a leading shield, and side shields. A trailing gap is disposed between the main pole and the trailing shield. A hot seed layer is disposed between the trailing gap and the trailing shield. A first insulation layer is disposed between the hot seed layer and the trailing shield, where the first insulation layer contacts the side shields. A second insulation layer is disposed between the main pole and leading shield, where the second insulation layer contacts the side shields. The first and second insulation layers direct the current through the side shields and across the main pole in a cross-track direction.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: January 23, 2024
    Assignee: Western Digital Technologies, Inc.
    Inventors: Muhammad Asif Bashir, Edward Hin Pong Lee, Amanda Baer, Aron Pentek, Zhigang Bai, Yunfei Ding, James Terrence Olson, Alexander Goncharov, Petrus Antonius Van Der Heijden
  • Patent number: 11881236
    Abstract: The present disclosure generally relates to a magnetic recording head comprising a spintronic device. The spintronic device is disposed between a main pole and a trailing shield of the magnetic recording head. The spintronic device comprises a multilayer spacer layer comprising a Cu layer in contact with a spin torque layer and a spin transparent texture layer disposed on the Cu layer, the spin transparent texture layer comprising AgSn or AgZn. A multilayer notch comprising a CoFe layer is disposed over the spin transparent texture layer of the multilayer spacer layer and a Heusler alloy layer is disposed on the CoFe layer, the Heusler alloy layer comprising CoMnGe, CoFeGe, or CoFeMnGe. The multilayer spacer layer and the multilayer notch result in the spintronic device having a high spin polarization and a reduced critical current.
    Type: Grant
    Filed: June 21, 2022
    Date of Patent: January 23, 2024
    Assignee: Western Digital Technologies, Inc.
    Inventors: James Mac Freitag, Susumu Okamura, Christian Kaiser
  • Patent number: 11875828
    Abstract: A reader of a magnetic recording head includes a sensor stack, a first side shield and a second side shield disposed on opposite sides of the sensor stack in a cross-track dimension, and a bridge. The bridge is configured to align magnetic moments of the first side shield and the second side shield. The bridge is disposed above the sensor stack relative to a media-facing surface of the magnetic recording head and proximate to the first side shield and the second side shield.
    Type: Grant
    Filed: October 13, 2022
    Date of Patent: January 16, 2024
    Assignee: Seagate Technology LLC
    Inventors: Victor B Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
  • Patent number: 11862202
    Abstract: Various illustrative aspects are directed to a data storage device comprising a disk and a spindle motor configured to rotate the disk wherein the spindle motor is powered by a drive voltage generated in response to a host voltage. The data storage device includes a head configured to be actuated over the disk by a head actuator and control circuitry comprising an isolation field effect transistor (ISOFET) configured to prevent a reverse current from flowing from the drive voltage to the host voltage when the host voltage falls below a threshold. The control circuitry sets a turnoff current level at which the ISOFET is directed to turn off to prevent the reverse current from flowing determines a drain-source on resistance Rdson of the ISOFET, and calculates a voltage turnoff threshold at which the ISOFET is turned off from the turnoff current level and the determined Rdson.
    Type: Grant
    Filed: May 9, 2022
    Date of Patent: January 2, 2024
    Inventors: Brian Johnson, Jaesoo Byoun, Hideaki Ito, Gaku Ikedo, Naoyuki Kagami
  • Patent number: 11862194
    Abstract: A data storage system comprises: a head configured to produce a signal representing data stored on a storage medium; an estimator configured to determine an estimated signal comprising a superposition of an estimated linear portion of a partial-response equalizer output and an estimated nonlinear portion of the signal; a bank of noise whitening filters configured for filtering a difference between the signal and the estimated signal; a branch metric calculator configured to calculate branch metrics based on the filtered signal; and an adaptive data-dependent noise-predictive maximum likelihood sequence detector configured to generate an output stream representing the data based on the one or more branch metrics.
    Type: Grant
    Filed: December 1, 2022
    Date of Patent: January 2, 2024
    Assignee: International Business Machines Corporation
    Inventors: Roy Cideciyan, Simeon Furrer, Mark Alfred Lantz