Patents Examined by Jefferson Evans
  • Patent number: 10891974
    Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and a record element located in a trailing gap between the main pole and the trailing magnetic shield. The record element includes an electrically conductive, non-magnetic material portion which is not part of a spin torque oscillator stack. The main pole and the trailing magnetic shield are electrically shorted by the record element across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the record element.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: January 12, 2021
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Venkatesh Chembrolu, Zhigang Bai, Yaguang Wei, Anna Zheng, Supradeep Narayana, Suping Song, Terence Lam, Michael Ho, Changqing Shi, Lijie Guan, Jian-Gang Zhu
  • Patent number: 10878843
    Abstract: According to one embodiment, a head suspension assembly includes a support plate having a proximal end and a distal end, a wiring member on the support plate and including a metal plate and a wiring board laid on the metal plate, the metal plate including a first joined portion joined to the support plate close to the distal end and a second joined portion joined to the support plate and located on a proximal end side of the support plate, a head mounted on the wiring member, an extendable piezoelectric element mounted on the wiring member, and a damper including a viscoelastic layer and a constraint layer stacked on the viscoelastic layer and attached to the support plate to cover the first joined portion and the second joined portion.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: December 29, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Kenichiro Aoki
  • Patent number: 10872623
    Abstract: A spin transfer torque reversal assisted magnetic recording (STRAMR) device is disclosed wherein a flux change layer (FCL) is formed between a main pole (MP) trailing side and a trailing shield (TS). The FCL has a magnetization that flips to a direction substantially opposing the write gap magnetic field when a direct current (DC) of sufficient current density is applied across the STRAMR device thereby increasing reluctance in the WG and producing a larger write field output at the air bearing surface. Heat transfer in the STRAMR device is enhanced and production cost is reduced by enlarging the STRAMR width to be essentially equal to that of the TS, and where the TS and STRAMR widths are formed using the same process steps. Bias voltage is used to control the extent of FCL flipping to a center portion to optimize the gain in area density capability in the recording system.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: December 22, 2020
    Assignee: Headway Technologies, Inc.
    Inventor: Yan Wu
  • Patent number: 10872624
    Abstract: A magnetic head includes a coil, a main pole, a write shield, a lower return path section, and an accommodation section. The accommodation section accommodates at least part of the return path section. A first portion of the accommodation section has a first inclined surface. A second portion of the accommodation section has a second inclined surface. A coil element of the coil has a third inclined surface opposed to the first inclined surface, and a fourth inclined surface opposed to the second inclined surface. The lower return path section includes a first inclined portion extending along the first inclined surface, and a second inclined portion extending along the second inclined surface.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: December 22, 2020
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Shigeki Tanemura, Hironori Araki, Yukinori Ikegawa
  • Patent number: 10867627
    Abstract: An apparatus comprises a microwave-assisted magnetic recording slider body. The body includes a write pole, a trailing shield, a spin torque oscillator, and an amplifying structure. The write pole extends from the air bearing surface into the slider body for a first distance, and the trailing shield extends from the air bearing surface into the slider body for a second distance. The spin torque oscillator is disposed proximate and between the write pole and the trailing shield at the air bearing surface and extends into the slider body for a third distance that is less than the first and second distances. The amplifying structure comprises a stepped portion and a gap, is recessed from the air bearing surface and disposed proximate the spin torque oscillator. The gap has a first interface with the write pole and a second interface with the trailing shield, wherein at least one of the first and second interfaces forms the stepped portion.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: December 15, 2020
    Assignee: Seagate Technology LLC
    Inventors: Kirill Aleksandrovich Rivkin, Javier Ignacio Guzman, Mourad Benakli
  • Patent number: 10861486
    Abstract: A PMR (perpendicular magnetic recording) write head configured for microwave assisted magnetic recording (MAMR) includes a spin-torque oscillator (STO) and trailing shield formed of high moment magnetic material (HMTS). By patterning the STO and the HMTS in a simultaneous process the HMTS and the STO layer are precisely aligned and have very similar cross-track widths. In addition, the write gap at an off-center location has a thickness that is independent from its center-track thickness and the write gap total width can have a flexible range whose minimum value is the same width as the STO width.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: December 8, 2020
    Assignee: Headway Technologies, Inc.
    Inventors: Yuhui Tang, Ying Liu
  • Patent number: 10861488
    Abstract: According to one embodiment, a disk device includes a first actuator assembly on a support shaft via a first bearing unit, and a second actuator assembly on the support shaft via a second bearing unit. The first bearing unit includes a first shaft on the support shaft, a first sleeve fixed to the first actuator block, and a bearing between the first shaft and the first sleeve. The second bearing unit includes a second shaft on the support shaft, separated from the first shaft, a second sleeve fixed to the second actuator block, and a bearing between the second shaft and the second sleeve. One axial end of the first shaft faces one axial end of the second shaft.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: December 8, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devies & Storage Corporation
    Inventors: Kenji Hayasaka, Hisashi Hasegawa
  • Patent number: 10854236
    Abstract: At least one jack screw from a tape deck base may be removed. The tape deck base may be below a rigid support base that includes a rigid support shaft in the center of the rigid support base. A piezoelectric stack may be inserted where the at least one jack screw was removed from the tape deck base. The piezoelectric stack may tilt a tape guide roller bearing in a skew direction to improve the motion of tape in a tape path.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: December 1, 2020
    Assignee: International Business Machines Corporation
    Inventors: David Harper, Nhan Xuan Bui
  • Patent number: 10854222
    Abstract: According to one embodiment, a magnetic recording and reproducing device includes a magnetic flux control layer provided between a main magnetic pole and an auxiliary magnetic pole, and a protective layer provided on an ABS of the auxiliary magnetic pole. The magnetic flux control layer includes an adjustment layer formed of a magnetic material including one of Fe, Co or Ni and is provided between a first conductive layer and a second conductive layer, and generates a spin torque and inverts a direction of magnetization in the adjustment layer, when current is supplied. A voltage Vb applied to the magnetic flux control layer is lower than a voltage Vba represented by an expression (1), Vba=Vb0?a×1/log(t)×log(RH)×log(PO2).
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: December 1, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Yusuke Tomoda, Kaori Kimura, Akihiko Takeo
  • Patent number: 10839845
    Abstract: Magnetic sensors with effectively shaped side shields and their fabrication processes are provided. One such process includes depositing sensor materials on a substrate, shaping the sensor materials to form a stripe height of the magnetic sensor, shaping the sensor materials to form a track width of the magnetic sensor, depositing side shield materials on the shaped sensor materials, shaping the side shield materials such that a resulting side shield extends further than the stripe height, depositing an insulator layer on the shaped side shield materials, and shaping the insulator layer.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: November 17, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Quang Le, Yongchul Ahn, Xiaoyong Liu, Jui-Lung Li, Hongquan Jiang
  • Patent number: 10839841
    Abstract: Provided herein is an apparatus including a disk drive base, wherein the disk drive base includes a first metal composition with a first CTE (“coefficient of thermal expansion”). A disk drive cover is attached to the disk drive base, wherein the disk drive cover includes a second metal composition with a second CTE that are different from the first metal composition and the first CTE. An arm is connected to a reader and a writer, wherein the arm is coupled to the disk drive base, the reader and the writer are separated by a distance, and the distance affects an MR (“magnetoresistive”) offset. In response to temperature changes between 0° C. and 60° C., the first material and the second material expand and contract comparably and proportionally. In further response to the temperature changes between 0° C. and 60° C., a change in the MR offset is less than 10% or a preferably defined range of a track pitch on a recording medium attached to the disk drive base.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: November 17, 2020
    Assignee: Seagate Technology LLC
    Inventors: Xiong Liu, Lihong Zhang
  • Patent number: 10839860
    Abstract: A hard disk drive includes a cover coupled to a base deck to create an enclosure. The hard disk drive further includes data-recording components and non-data-recording components positioned within the enclosure. At least one of the non-data-recording components includes a surface with a surface treatment that promotes condensation of water vapor.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: November 17, 2020
    Assignee: Seagate Technology LLC
    Inventors: Li Hong Zhang, Xiong Liu
  • Patent number: 10832721
    Abstract: An apparatus for burnishing media, according to one embodiment, includes a first block with a media bearing surface having a plurality of channels and lands. The channels and lands alternate in a direction of media travel. Each of the lands has at least one skiving edge along a width thereof. The width of each land extends orthogonally to the direction of media travel. The apparatus also includes a mechanism for inducing a wrap angle of the media relative to media bearing surfaces of at least some of the lands. Each induced wrap angle is greater than zero degrees. An apparatus for burnishing media according to another embodiment includes channels having widths that are less than a width of the media.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: November 10, 2020
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Gary M. Decad, Jason Liang, Calvin S. Lo
  • Patent number: 10832710
    Abstract: Embodiments of the present disclosure generally relate to a magnetic media drive employing a magnetic recording device. The magnetic recording device comprises a trailing gap disposed adjacent to a first surface of a main pole, a first side gap disposed adjacent to a second surface of the main pole, a second side gap disposed adjacent to a third surface of the main pole, and a leading gap disposed adjacent to a fourth surface of the main pole. A side shield surrounds the main pole and comprises a heavy metal first layer and a magnetic second layer. The first layer surrounds the first, second, and third surfaces of the main pole, or the second, third, and fourth surfaces of the main pole. The second layer surrounds the second and third surfaces of the main pole, and may further surround the fourth surface of the main pole.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: November 10, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, Inc.
    Inventors: Suping Song, Zhanjie Li, Terence Lam, Lijie Guan
  • Patent number: 10818315
    Abstract: An apparatus according to one embodiment includes a magnetic head having at least two tunneling magnetoresistance sensors, where a resistance of a tunnel barrier of each of the tunneling magnetoresistance sensors of the magnetic head is about 25 ohms or less, a drive mechanism for passing a magnetic medium over the magnetic head, and a controller electrically coupled to the magnetic head. In addition, the controller includes a biasing circuit, where the biasing circuit restricts a maximum voltage drop across the tunnel barrier.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: October 27, 2020
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Jason Liang, Calvin S. Lo
  • Patent number: 10811038
    Abstract: A heat-assisted magnetic recording head includes a write pole tip that extends to a media-facing surface and a heat sink that is thermally coupled to a side of the write pole tip. A surface plasmonic plate is in contact with a side of the heat sink that faces away from the write pole and is recessed from, the media-facing surface. A nanorod extends from a surface of the surface plasmonic plate and towards the media-facing surface.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: October 20, 2020
    Assignee: Seagate Technology LLC
    Inventors: Chubing Peng, Michael Allen Seigler
  • Patent number: 10811042
    Abstract: A thermally assisted magnetic recording head and a thermally assisted magnetic recording disk drive are disclosed. The thermally assisted magnetic recording head includes a slider body, a laser substrate, a laser and a magnetic head, wherein the laser substrate is provided on the slider body, the laser is provided on the laser substrate, and the magnetic head is provided at a front end of the slider body. The magnetic head includes an optical waveguide facing the laser. The angle between a light incident surface of the optical waveguide and an incident direction of a laser light incident on the optical waveguide is less than 90 degrees. The thermally assisted magnetic recording disk drive includes a plurality of magnetic disks and a magnetic head suspending frame. A front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads mentioned above.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: October 20, 2020
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Ryuji Fujii, Jian Hui Huang, Natsuo Nishijima, Lin Huang, Shi Xiong Chen, Bin Qi, Wen Rong Guo
  • Patent number: 10811034
    Abstract: A microwave-assisted magnetic recording writer is disclosed wherein a heat sink is formed in a write gap (WG) and adjacent to a spin torque oscillator (STO) formed between a main pole (MP) trailing side and a trailing shield (hot seed layer). The WG comprises an electrically insulating layer with thickness of 5-80 Angstroms on the MP trailing side and STO sides. The heat sink layer may be separate coplanar layers on each STO side, or a single layer wrapping around the STO. A Ru or Cu heat sink has sufficient thermal conductivity to reduce STO temperature rise by 11% and 20%, respectively. Accordingly, the STO has longer lifetime at the same bias current density, or higher buffer head voltage is possible while maintaining STO device reliability. Each heat sink has a front side at an air bearing surface, and a stripe height (SH)?to the STO SH.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: October 20, 2020
    Assignee: Headway Technologies, Inc.
    Inventors: Yan Wu, Kowang Liu
  • Patent number: 10811036
    Abstract: A magnetic head, according to one embodiment, includes a rowbar substrate having a tape support surface and a gap surface at a substrate edge. A closure is positioned opposite the gap surface of the rowbar substrate, the closure forming a portion of the tape support surface. A recessed gap region is interposed between the gap surface of the rowbar substrate and the closure, the recessed gap region having a recessed gap profile that extends between the gap surface of the rowbar substrate and the closure, the recessed gap region having a transducer row with at least one magnetic sensor on the gap surface of the rowbar substrate. An insulation layer is positioned over the recessed gap profile of the recessed gap region.
    Type: Grant
    Filed: October 8, 2018
    Date of Patent: October 20, 2020
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Icko E. T. Iben, Jason Liang
  • Patent number: 10803886
    Abstract: An apparatus includes a slider configured for heat-assisted magnetic recording, the slider comprising an air bearing surface (ABS), a writer, a reader, and a plurality of electrical bond-pads. The apparatus also includes a first component situated at the ABS of the slider proximate the reader and operatively coupled to a first pair of the plurality of electrical bond-pads, the first component being a thermocouple configured to sense for a thermal aspect of a magnetic recording medium surface. According to aspects of the invention, the slider is configured to share at least one bond-pad by operatively coupling a second pair of the plurality of electrical bond-pads to a second component, and the slider is configured to selectively utilize the thermocouple and the second component.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: October 13, 2020
    Assignee: Seagate Technology LLC
    Inventors: Declan Macken, Michael Thomas Johnson, Todd Michael Lammers, Kent Edward Bodurtha