Patents Assigned to Seagate Technology
  • Patent number: 10496559
    Abstract: Systems and methods are disclosed for full utilization of a data path's dynamic range. In certain embodiments, an apparatus may comprise a circuit including a first filter to digitally filter and output a first signal, a second filter to digitally filter and output a second signal, a summing node, and a first adaptation circuit. The summing node combine the first signal and the second signal to generate a combined signal at a summing node output. The first adaptation circuit may be configured to receive the combined signal, and filter the first signal and the second signal to set a dynamic amplitude range of the combined signal at the summing node output by modifying a first coefficient of the first filter and a second coefficient of the second filter based on the combined signal.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: December 3, 2019
    Assignee: Seagate Technology LLC
    Inventors: Jason Bellorado, Marcus Marrow, Zheng Wu
  • Patent number: 10493591
    Abstract: Embodiments of the present disclosure include methods and systems of lapping a row bar of sliders, where the systems and methods use externally mounted laser components to focus laser energy on an area of an individual slider that can absorb the laser energy in a manner to cause at least the write pole and/or reader to protrude more relative to one or more other slider components (e.g., a reader) during lapping.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: December 3, 2019
    Assignee: Seagate Technology LLC
    Inventors: Gary J. Kunkel, Zoran Jandric, Andrew Habermas
  • Patent number: 10490214
    Abstract: An apparatus comprises a write pole, a waveguide core, and a near-field transducer (NFT) positioned between the write pole and the waveguide core. The NFT comprises an enlarged portion and a peg comprising a refractory metal and extending from the enlarged portion toward a media-facing surface. A first dielectric layer is positioned between the peg and the write pole, and a first adhesion layer is positioned between the peg and the first dielectric layer. In addition, a second dielectric layer is disposed on an entire surface of the NFT opposing the media-facing surface, and a second adhesion layer is positioned between the NFT and the second dielectric layer.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: November 26, 2019
    Assignee: Seagate Technology LLC
    Inventor: Weibin Chen
  • Patent number: 10490221
    Abstract: A near field transducer has a bottom disc with a first surface facing a write pole of a recording head. The bottom disc is recessed from a media-facing surface of the recording head by a distance R. An anchor layer is stacked on the first surface of the bottom disc and has an enlarged part with a peripheral shape corresponding to that of the bottom disc. The anchor layer further has a peg that extends from an end of the enlarged part towards the media facing surface, the end of the enlarged part recessed from the media facing surface by the distance R. A middle disc is on a second surface of the anchor layer. The middle disc is recessed from the media-facing surface a distance MDSCR that is greater than the distance R. A heat sink is stacked on a third surface of the middle disc. The heat sink is recessed from the media-facing surface by at least a distance TPH that is greater than the distance MDSCR.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: November 26, 2019
    Assignee: Seagate Technology LLC
    Inventor: Weibin Chen
  • Patent number: 10490232
    Abstract: A storage container includes a base housing member coupled to an inner cover and including an inner cavity. The storage container further includes an outer cover coupled to the base housing member and covering the inner cover. A rack assembly includes a plurality of storage devices and is mounted within the inner cavity.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: November 26, 2019
    Assignee: Seagate Technology LLC
    Inventors: Christopher M Woldemar, YiChao Ma, Xiong Liu, Li Hong Zhang
  • Patent number: 10490288
    Abstract: Page-level reference voltage parameterization techniques are provided for solid state memory devices. A method comprises obtaining a bit error count for a plurality of page numbers across a plurality of blocks of a solid state memory device; determining a substantially optimal reference voltage for each page number that substantially minimizes a corresponding bit error count; collecting, for each reference voltage, page numbers and corresponding substantially optimal reference voltages; and determining, for each reference voltage, a non-linear function that substantially fits a distribution of the collected page numbers and corresponding substantially optimal reference voltages, wherein a given page having a given page number is read using a plurality of parameters of the non-linear function to generate the substantially optimal reference voltage for the given page number.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: November 26, 2019
    Assignee: Seagate Technology LLC
    Inventors: Zheng Wang, Ara Patapoutian
  • Patent number: 10490229
    Abstract: The apparatus includes a drive base, a drive cover overlying the drive base, wherein the drive cover comprises an opening therein, and wherein the drive cover is coupled to the drive base to enclose a media within an interior of the apparatus. A snubber is overmolded onto the drive cover. The media contacts the snubber during shock events.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: November 26, 2019
    Assignee: Seagate Technology LLC
    Inventors: See Jee Koong, Pow Ming Yap, Tai Zen Tan, Swee How Alvin Teo, Ying Su, Kim Tai Chin
  • Patent number: 10490219
    Abstract: First and second tracks are read simultaneously via a first reader mounted in a head-gimbal assembly. The first reader provides a first signal based on detecting a total perpendicular field of the first and second tracks. The first and second tracks are read simultaneously via a second reader mounted in the head-gimbal assembly. The second reader provides a second signal based on detecting a total longitudinal field of the first and second tracks. At least one of a position error and a timing error of at least one of the first and second readers are determined based on user data read via the respective first and second signals.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: November 26, 2019
    Assignee: Seagate Technology LLC
    Inventors: Mehmet Fatih Erden, Walter R. Eppler
  • Patent number: 10490215
    Abstract: An apparatus comprises a write pole, a waveguide core, and a near-field transducer (NFT) positioned between the write pole and the waveguide core. The NFT comprises a heatsink portion, an enlarged portion, and a peg comprising a refractory metal and extending from the enlarged portion toward a media-facing surface. A first surface of the peg is substantially coplanar with a first surface of the enlarged portion and the first surface of the enlarged portion shares an interface with the heatsink portion. A first dielectric layer is positioned between the peg and the write pole, and a first adhesion layer is positioned between the peg and the first dielectric layer. In addition, a second dielectric layer is disposed on an entire surface of the NFT opposing the media-facing surface, and a second adhesion layer is positioned between the NFT and the second dielectric layer.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: November 26, 2019
    Assignee: Seagate Technology LLC
    Inventor: Weibin Chen
  • Patent number: 10490234
    Abstract: An unrecoverable error is determined when attempting to access data stored in a target memory unit of a storage medium of a data storage device. Access to neighboring memory units that are proximate to the target memory unit is controlled in response. The controlling of the access affects a temperature of the target memory unit over a period of time. After the period of time, access to the data is attempted from the target memory unit.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: November 26, 2019
    Assignee: Seagate Technology LLC
    Inventors: Jay Allen Sheldon, Ryan James Goss
  • Patent number: 10482906
    Abstract: A near-field transducer is situated at or proximate an air bearing surface of the apparatus and configured to facilitate heat-assisted magnetic recording on a medium. The near-field transducer includes an enlarged region comprising plasmonic material and having a first end proximate the air bearing surface. The near-field transducer also includes a disk region adjacent the enlarged region and having a first end proximate the air bearing surface. The disk region comprises plasmonic material. A peg region extends from the first end of the disk region and terminates at or proximate the air bearing surface. The near-field transducer further includes a region recessed with respect to the peg region. The recessed region is located between the peg region and the first end of the enlarged region.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: November 19, 2019
    Assignee: Seagate Technology LLC
    Inventors: Weibin Chen, Werner Scholz
  • Patent number: 10484371
    Abstract: A computing device may accumulate behavior parameters of a controller or media with an authentication module of the controller prior to generating a unique signature with the authentication module. The unique signature can then be verified responsive to an initialization command from a host device before data is transferred by the controller between the host device and the media in response to the controller issuing at least one data access command.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: November 19, 2019
    Assignee: Seagate Technology LLC
    Inventor: Jackson Ellis
  • Patent number: 10481873
    Abstract: A method includes detecting noise in a laser output of a heat assisted magnetic recording device. The noise is converted into an electrical signal including a numerical value. A least significant digit of the numerical value is selected. The least significant digit is concatenated with another least significant digit from another detecting of another noise in another laser output to form a number.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: November 19, 2019
    Assignee: Seagate Technology LLC
    Inventors: Li Hong Zhang, WenXiang Xie, Xiong Liu
  • Patent number: 10482918
    Abstract: A set of patterns written to a magnetic recording medium are found that result in a relatively high and/or low error when read back. Upon writing subsequent to the determining of the set of patterns, one pattern of the set of the patterns is identified within a data segment ready to be written to the magnetic recording medium. The data segment is written with a changed bit spacing in response to identifying that the one pattern of the set of the patterns is within the data segment.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: November 19, 2019
    Assignee: Seagate Technology LLC
    Inventors: Mehmet Fatih Erden, Stephanie Hernandez, Steven Douglas Granz
  • Patent number: 10482911
    Abstract: A first drive volume formed on a disk within a drive enclosure. The first drive volume is read from and written to by a first head that is moved by a first actuator, A second drive volume is formed on the one or more disks. The second volume is read from and written to by a second head that is moved via a second actuator within the drive enclosure. The second actuator is separate and independent from the first actuator. Data of the first drive volume is duplicated onto the second drive volume, Background validation operations are performed on the second drive volume instead of the first volume.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: November 19, 2019
    Assignee: Seagate Technology LLC
    Inventor: Vijay Nanjunda Swamy
  • Patent number: 10482983
    Abstract: Apparatus and method for reducing read disturbed data in a non-volatile memory (NVM). Read operations applied to a first location in the NVM are counted to accumulate a read disturb count (RDC) value. Once the RDC value reaches a predetermined threshold, a flag bit is set and a first bit error statistic (BES) value is evaluated. If acceptable, the RDC value is reduced and additional read operations are applied until the RDC value reaches the predetermined threshold a second time. A second BES value is evaluated and data stored at the first location are relocated if an unacceptable number of read errors are detected by the second BES value. Different thresholds are applied to the first and second BES values so that fewer read errors are acceptable during evaluation of the second BES value as compared to the first BES value.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: November 19, 2019
    Assignee: Seagate Technology LLC
    Inventors: Abdel Hakim Alhussien, Ludovic Danjean, Sundararajan Sankaranarayanan, Erich Franz Haratsch
  • Patent number: 10482914
    Abstract: A device including a near field transducer, the near field transducer including gold (Au) and at least one other secondary atom, the at least one other secondary atom selected from: boron (B), bismuth (Bi), indium (In), sulfur (S), silicon (Si), tin (Sn), hafnium (Hf), niobium (Nb), manganese (Mn), antimony (Sb), tellurium (Te), carbon (C), nitrogen (N), and oxygen (O), and combinations thereof; erbium (Er), holmium (Ho), lutetium (Lu), praseodymium (Pr), scandium (Sc), uranium (U), zinc (Zn), and combinations thereof; and barium (Ba), chlorine (Cl), cesium (Cs), dysprosium (Dy), europium (Eu), fluorine (F), gadolinium (Gd), germanium (Ge), hydrogen (H), iodine (I), osmium (Os), phosphorus (P), rubidium (Rb), rhenium (Re), selenium (Se), samarium (Sm), terbium (Tb), thallium (Th), and combinations thereof.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: November 19, 2019
    Assignee: Seagate Technology LLC
    Inventors: Yuhang Cheng, Tong Zhao, Michael C. Kautzky, Ed F. Rejda, Kurt W. Wierman, Scott Franzen, Sethuraman Jayashankar, Sarbeswar Sahoo, Jie Gong, Michael Allen Seigler
  • Patent number: 10482912
    Abstract: A magnetic recording medium includes a recording surface comprising a first recording layer having a first ferromagnetic resonant frequency and a second recording layer having a second ferromagnetic resonant frequency. The first recording layer is configured for storing user data and the second recording layer configured for storing servo data. A recording head arrangement is configured for microwave-assisted magnetic recording (MAMR) and writing user data to the first recording layer. The recording head arrangement comprises a write pole configured to generate a write magnetic field, and a write-assist arrangement proximate the write pole. The write-assist arrangement is configured to generate a radiofrequency assist magnetic field at a frequency that corresponds to the first ferromagnetic resonant frequency. A reader of the recording head arrangement is configured to read combined signals from the first and second recording layers.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: November 19, 2019
    Assignee: Seagate Technology LLC
    Inventors: Xiong Liu, Lihong Zhang, PengBoon Khoo
  • Patent number: 10485136
    Abstract: A fan assembly includes a fan module having a plurality of mounting openings, a housing partially surrounding the fan module, and a plurality of dampers that extend through the plurality of mounting openings to couple the fan module to the housing.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: November 19, 2019
    Assignee: Seagate Technology LLC
    Inventors: Shankar Gopalakrishna, Kiran Devapalan, Saju Cheeran Verghese Francis, Vivekananda Avvaru, Anil KC
  • Patent number: 10482908
    Abstract: An apparatus comprises a laser diode configured to generate light during a write operation. A slider comprises a near-field transducer (NFT) and an optical waveguide. The slider is configured for heat-assisted magnetic recording and to communicate the light to the NFT via the waveguide. A writer heater of the slider is configured to receive power during the write operation. A thermal sensor is situated at or near an air bearing surface of the slider. The thermal sensor is configured to produce a sensor signal in response to sensing back-heating from the medium while the NFT generates heat during a write operation. Circuitry, coupled to the thermal sensor, is configured to compare the sensor signal to a threshold and generate an output signal indicative of degradation of NFT performance in response to the sensor signal exceeding the threshold.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: November 19, 2019
    Assignee: Seagate Technology LLC
    Inventors: Riyan Mendonsa, Jon D. Trantham, James Dillon Kiely, Peng Li, Joshua Ward Christensen