Patents Assigned to Seagate Technologies
  • On wafer laser stability control for heat-assisted magnetic recording
    Patent number: 10692525
    Abstract: An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer that directs energy resulting from plasmonic excitation to a recording medium. A light detector is configured to detect an amount of light. At least one laser heater is disposed proximate the laser. A controller is configured to control current supplied to the at least one heater based on the detected amount of light.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: June 23, 2020
    Assignee: Seagate Technology LLC
    Inventors: Aidan Dominic Goggin, Mark Anthony Gubbins, Kelly Elizabeth Callan, Reyad Mehfuz, Marcus B. Mooney, Fadi El Hallak, Paula Frances McElhinney
  • Target parameter adaptation
    Patent number: 10692527
    Abstract: An apparatus may include a circuit including a filter configured to update one or more adaptive coefficients of the filter based on an error signal. Further, the circuit may update a constrained coefficient of the filter based on the one or more adaptive coefficients, the constrained coefficient and a desired value. Moreover, the circuit may generate a sample of a sample sequence based on the one or more adaptive coefficients and the updated constrained coefficient, the error signal being based on the sample sequence.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: June 23, 2020
    Assignee: Seagate Technology LLC
    Inventors: Jason Vincent Bellorado, Marcus Marrow, Zheng Wu
  • Preamble defect detection and mitigation
    Patent number: 10694007
    Abstract: Systems and methods are disclosed for detection and mitigation of defects within a preamble portion of a signal, such as a data sector preamble recorded to a data storage medium. In certain embodiments, an apparatus may comprise a circuit configured to synchronize a sampling phase for sampling a signal pattern. The circuit may sample a preamble field of the signal pattern to obtain sample values, split the sample values into a plurality of groups, determine defect groups having samples corresponding to defects in the preamble field, remove the defect groups from the plurality of groups, and synchronize the sampling phase based on the plurality of groups.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: June 23, 2020
    Assignee: Seagate Technology LLC
    Inventors: Jason Vincent Bellorado, Marcus Marrow
  • Carrierless drive insertion, retention and removal system
    Patent number: 10692541
    Abstract: An apparatus includes a guide system having first and second opposing guide walls with guide features extending from the first and second guide walls. The guide features support a data storage device when the data storage device is positioned between the first and the second opposing guide walls. The apparatus also includes a slidable member operably coupled to the first guide wall. The slidable member includes a top portion having retention features and a bottom portion having a lifting member. The lifting member enables lifting of the data storage device by the slidable member when the data storage device is within the guide system. The slidable member further includes a bent latch-release portion between the top portion and the bottom portion. The bent latch-release portion biases the data storage device towards the second guide wall.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: June 23, 2020
    Assignee: Seagate Technology LLC
    Inventors: Kevin Van Pelt, Charlie Morris, Odie Killen
  • Green drive with status indicator
    Patent number: 10692335
    Abstract: Methods, systems, and devices are described for displaying information on a visual display of a data storage device. The device may be an internal data storage device and may display information associated with various operation parameters and a security confidence metric or states of the data storage device. The data storage device may display, on the visual display, an indication of a security confidence metric of the data storage device indicative of whether the data storage device has been compromised. The data storage device may be compromised by having one or more sub-components replaced, altered, or misused. The visual display may be electronic paper, mechanical, or chemical such that the information is displayed without power being applied to the data storage device. The visual display may be removable from the data storage medium.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: June 23, 2020
    Assignee: Seagate Technology LLC
    Inventor: Aliasghar Riahi
  • Barrier device used in the manufacture of a lapping plate, and related apparatuses and methods of making
    Patent number: 10682737
    Abstract: The present disclosure includes barrier devices for use in an apparatus used to form lapping plates. The barrier devices can contain liquid on the surface of the lapping plate platen. The present disclosure also involves related methods.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: June 16, 2020
    Assignee: Seagate Technology LLC
    Inventors: Chea Phann, Ricky Ray Anderson, Kevin Lambert Mayer, Mihaela Ruxandra Baurceanu, Andrew David Habermas, Raymond Leroy Moudry, Joel William Hoehn
  • Circuit including efficient clocking for testing memory interface
    Patent number: 10685730
    Abstract: In some embodiments, an integrated circuit may include a memory self-testing circuit and a memory having a plurality of data storage locations, each location having a unique address. The integrated circuit may further include an output including at least one register capable of storing an address of a memory location where an error has been detected during execution of the memory self-testing circuit. Further, the integrated circuit may include an on-chip clock controller (OCC) circuit including a first output to provide a first clock signal and a second output to provide a second clock signal according to a mode of operation. In a scan mode, the OCC circuit may be configured to enable the first clock signal and the second clock signal and to selectively enable the first clock signal and the second clock signal to be mutually exclusive during a scan capture portion of the scan mode.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: June 16, 2020
    Assignee: Seagate Technology LLC
    Inventors: Komal Shah, Jay Shah, Sachin Bastimane
  • Data updating in non-volatile memory
    Patent number: 10684778
    Abstract: Various embodiments of the present invention are generally directed to an apparatus and associated method for updating data in a non-volatile memory array. In accordance with some embodiments, a memory block is formed with a plurality of types of memory cell sectors arranged in data pages of a first type and log pages of a second type that can be updated in-place. A first updated sector is written to a first log page while maintaining an outdated sector in an original data page, and overwritten with a second updated sector.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: June 16, 2020
    Assignee: Seagate Technology LLC
    Inventors: Yiran Chen, Hai Li, Wenzhong Zhu, Xiaobin Wang, Yuan Yan, Harry Hongyue Liu
  • Self-contained key management device
    Patent number: 10678953
    Abstract: A local key management system can be implemented with a unified extensible firmware interface (“UEFI”) basic input/output system (“BIOS”). The local key management system may be part of a removable data storage device that has a first secure area protected by a cryptographic module (e.g. hardware integrated circuit). The removable data storage device may also have a second secure area that stores a key to unlock a security enabled data storage device. The UEFI BIOS may be implemented to manage unlocking of security enabled data storage devices or data bands. The UEFI BIOS may also load a UEFI registration shell to manage registration of one or more security enabled drives or bands.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: June 9, 2020
    Assignee: Seagate Technology LLC
    Inventors: Christopher Nicholas Allo, Saheb Biswas
  • Automated detection of artifacts in scan image
    Patent number: 10679353
    Abstract: A method of analyzing an atomic force microscope image includes receiving data related to an atomic force microscope image, where the data includes at least a first channel of data and a second channel of data relating to a first and second image data type. The method also includes identifying at least a first location of high contrast within the image using the first image data type using edge detection and identifying a first artifact within the image based on the identified first location of high contrast. The method also includes accessing the second image data type corresponding to the identified first location of the first artifact and determining a type of the first artifact by comparing the first image data type with the second image data type relating to the identified location of the first artifact.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: June 9, 2020
    Assignee: Seagate Technology LLC
    Inventors: Zhiyu Chen, Ramprasath A. Prakash
  • Method and apparatus with multiple cavities
    Patent number: 10679680
    Abstract: Certain exemplary aspects of the present disclosure are directed towards dual cavity apparatus and related methods involving hermetically sealing the cavities by evacuating and atmosphere therein, filling the cavity with a gas, and sealing the gas in the cavities. This evacuation and fill approach is carried out through openings that provide access to the cavities. During evacuation of at least one of the cavities through one of the openings, one or more spacers prevent the cavity from collapsing in response to the vacuum force.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: June 9, 2020
    Assignee: Seagate Technology LLC
    Inventors: David G. Fitzgerald, David Ray Lapp, Jeffrey James Croxall, Robert M. Gibbs
  • Dynamically modifying a boundary of a deep learning network
    Patent number: 10679140
    Abstract: A connection between a user device and a network server is established. Via the connection, a deep learning network is formed for a processing task. A first portion of the deep learning network operates on the user device and a second portion of the deep learning network operates on the network server. Based on cooperation between the user device and the network server, a boundary between the first portion and the second portion of the deep learning network is dynamically modified based on a change in a performance indicator that could affect the processing task.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: June 9, 2020
    Assignee: Seagate Technology LLC
    Inventors: Kevin Arthur Gomez, Frank Dropps, Ryan James Goss, Jon Trantham, Antoine Khoueir
  • Electronic test structures for one or more magnetoresistive elements, and related methods
    Patent number: 10672423
    Abstract: The present disclosure involves electronic test structures, and related methods, for use with one or more magnetoresistive elements at least at the wafer stage of slider manufacturing.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: June 2, 2020
    Assignee: Seagate Technology LLC
    Inventors: Jeff R. O'Konski, Andrew David Habermas, Charles J. Mann, Greg A. Schmitz
  • Data transfers with adaptively adjusted polling times
    Patent number: 10664168
    Abstract: Method and apparatus for managing data in a memory, such as a flash memory. In accordance with some embodiments, a memory module has a non-volatile memory (NVM) and a memory module electronics (MME) circuit. A controller circuit communicates a first command to the MME circuit to perform a selected action upon a selected address of the NVM. After a variable delay time interval, a second command is communicated by the controller circuit to the MME circuit as a status request regarding the first command. The variable delay time interval is determined based on an accumulated count of status requests that were issued, prior to the first command, for the selected address.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: May 26, 2020
    Assignee: Seagate Technology LLC
    Inventors: Timothy Canepa, Stephen Hanna
  • Mitigation of error correction failure due to trapping sets
    Patent number: 10666295
    Abstract: An apparatus includes an interface and a control circuit. The interface may be configured to process transfers to/from a medium. The control circuit may be configured to generate a trapping set list of trapping sets of a low-density parity check code, classify bit positions of the trapping sets as belonging to either a user bits field or a parity bits field of a codeword, encode data using the low-density parity check code to generate the codeword, and present the codeword to the interface to transfer the codeword to the medium. The generation of the codeword may include at least one of a shortening or a puncturing of bit locations in the codeword in response to the classifying of the bit positions of the trapping sets. All of the data may be held in the bit locations of the codeword other than the bit locations that are shortened or punctured.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: May 26, 2020
    Assignee: Seagate Technology LLC
    Inventors: Ludovic Danjean, Sundararajan Sankaranarayanan, Ivana Djurdjevic, AbdelHakim Alhussien, Erich F. Haratsch
  • Coupling multiple controller chips to a host via a single host interface
    Patent number: 10664172
    Abstract: A data storage device includes a first system-on-a-chip (SOC) associated with a first read transducer that accesses one or more magnetic disks of the data storage drive. The first SOC has a first read channel operable to receive data from the first read transducer. A second SOC is associated with a second read transducer that accesses the one or more magnetic disks of the data storage drive independently of the first read transducer. The second SOC has a second read channel operable to receive second data from the second read transducer. The first and second SOCs are coupled via a data bus that facilitates communicating the first and second data to a host via a first host interface.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: May 26, 2020
    Assignee: Seagate Technology LLC
    Inventors: Jon D. Trantham, Bruce Douglas Buch, Kyaw Sin Maung, Aaron P. Weyer
  • Inter-drive data transfer
    Patent number: 10664184
    Abstract: A drive-to-drive data transfer may be performed by means of a host configuring registers in a source device and a sink device and triggering a transfer. Data copy logic of controllers of the source and sink devices may then proceed to perform the endpoint to endpoint transfer, for example, using transaction layer packets (TLPs).
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: May 26, 2020
    Assignee: Seagate Technology LLC
    Inventors: Sumanranjan Mitra, Lalitha Kameswar Mallela
  • Readback waveform oversampling method and apparatus
    Patent number: 10665254
    Abstract: A read channel is configured to obtain an analog readback waveform from a magnetic recording medium of a disk drive at a sampling rate of one sample per one written bit. A buffer is coupled the read channel. Circuitry is configured to inject a plurality of different phase offsets into the read channel for each of a plurality of revolutions of the medium. The circuitry is also configured to store, in a buffer, an amplitude of the readback waveform for each of the different phase offsets. The circuitry is further configured to generate an oversampled readback waveform using the amplitudes stored in the buffer.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: May 26, 2020
    Assignee: Seagate Technology LLC
    Inventors: Drew Michael Mader, Wenzhong Zhu
  • Hybrid timing recovery
    Patent number: 10665256
    Abstract: An apparatus may include a circuit configured to receive a first phase control value of a phase control value signal, generate a first phase interpolator control signal value of a phase interpolator control signal and generate a first digital interpolator control signal value of a digital interpolator control signal. The apparatus may further be configured to phase interpolate a clock signal based on the first phase interpolator control signal value to produce a phase shifted clock signal and digitally interpolate a digital sample based on the first digital interpolator signal value to produce a phase shifted digital sample having an effective phase based on the first phase control value, the digital sample generated using the phase shifted clock signal as a sample clock.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: May 26, 2020
    Assignee: Seagate Technology LLC
    Inventors: Jason Bellorado, Marcus Marrow, Zheng Wu
  • Contact detection and laser power monitoring sensor for heat-assisted magnetic recording head
    Patent number: 10657998
    Abstract: A slider configured for heat-assisted magnetic recording comprises a magnetic writer, a near-field transducer, and an optical waveguide coupling the near-field transducer to a light source. The writer is situated proximate the near-field transducer at an air bearing surface of the slider and comprises a first return pole, a second return pole, and a write pole situated between and spaced apart from the first return pole and the second return pole. A structural element is situated at or near the air bearing surface between the write pole and one of the first and second return poles. The structural element comprises a cavity. A thermal sensor is disposed in the cavity. The thermal sensor is configured for sensing contact between the slider and a magnetic recording medium, asperities of the medium, and output optical power of the light source.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: May 19, 2020
    Assignee: Seagate Technology LLC
    Inventor: James Gary Wessel