Patents Assigned to Seagate Technologies
  • Detection of adjacent track interference using size-adjustable sliding window
    Patent number: 9001442
    Abstract: Technologies are described herein for detecting adjacent track interference in a storage device using a size-adjustable sliding window. A value for an inter-track interference factor associated with at least one adjacent track is determined for a first area of a data track of the storage device. The first area may encompass a plurality of sectors of the data track. Next, it is determined whether the value of the calculated inter-track interference factor is greater than a threshold value, and if so, an indication of inter-track interference corresponding to the first area is stored in the storage device.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: April 7, 2015
    Assignee: Seagate Technology LLC
    Inventors: Donghyuk Park, Seungyoul Jeong, Joowon Cho
  • SIGNAL NOISE REJECTION
    Publication number: 20150092288
    Abstract: An implementation of a system disclosed herein provides a method of determining a frequency of baseline noise in a target or read sensor signal and rejecting a band of signals from the target or read sensor signal substantially around the frequency of the baseline noise, including devices to implement this method.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 2, 2015
    Applicant: Seagate Technology LLC
    Inventors: JungWook Hur, TaeYoung Kim
  • APPARATUSES AND METHODS HAVING A BEARING SHIELD ARRANGEMENT
    Publication number: 20150093061
    Abstract: Various aspects of the present disclosure are directed towards an apparatus/method including rolling elements, an outer ring surrounding an inner ring and the inner and outer rings guiding rotation of the rolling elements in a rotation region therebetween, and a cap secured to the inner ring. The apparatus further includes a bearing shield arrangement secured to one of the outer and inner rings and configured with the other of the outer and inner rings to define a gap for the flow of vapor or lubricant from the rotation region through a vapor restricting pathway.
    Type: Application
    Filed: October 1, 2013
    Publication date: April 2, 2015
    Applicant: Seagate Technology LLC
    Inventors: Kenneth L. Pottebaum, Scott A. Bengtson, David D. Koester
  • EFFICIENT ENERGY RECOVERY IN DISK DRIVE DURING POWER LOSS
    Publication number: 20150091475
    Abstract: A back electromotive force of a rotating motor is converted into a voltage for a load by driving, in accordance with a duty cycle, at least one switching circuit that couples the back electromotive force to a load through a rectifying circuit. An error signal is generated that is a difference between the load voltage and a reference voltage. The duty cycle is controlled as a function of the error signal to cause the load voltage to approach the reference voltage.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 2, 2015
    Applicant: Seagate Technology LLC
    Inventors: Binh Kim Lieu, Mark Lowell Elliott, Raye A. Sosseh
  • MAGNETIC STACK INCLUDING MgO-Ti(ON) INTERLAYER
    Publication number: 20150093598
    Abstract: A stack includes a substrate and a magnetic recording layer. Disposed between the substrate and magnetic recording layer is an MgO—Ti(ON) layer.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 2, 2015
    Applicant: Seagate Technology LLC
    Inventors: Yukiko Kubota, Timothy J. Klemmer, Kai Chieh Chang, Li Gao, Yinfeng Ding, Yingguo Peng, Jan-Ulrich Thiele
  • Error correction code rate management for nonvolatile memory
    Patent number: 8996961
    Abstract: An apparatus having an interface and a circuit is shown. The interface is coupled to a memory that is nonvolatile. The circuit is configured to (i) read a plurality of codewords from a block in the memory based on a program/erase count associated with the block, (ii) count a number of iterations used to decode the codewords and (iii) decrease a code rate of an error correction coding used to program the block in response to the number of iterations exceeding a threshold.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology LLC
    Inventors: Zhengang Chen, Jeremy Werner, Earl T. Cohen, Ning Chen, AbdelHakim S. Alhussien, Erich F. Haratsch
  • Head-medium contact detection using electromagnetic attraction
    Patent number: 8995076
    Abstract: An apparatus of the present disclosure generally includes a recording head, circuitry, a thermal sensor, and a detector. The recording head has an electromagnetic attraction to a recording medium. The circuitry is configured to oscillate the electromagnetic attraction between the recording head and the recording medium. The oscillating electromagnetic attraction produces a corresponding oscillating clearance between the recording head and the recording medium. The thermal sensor, located in or near the recording head, senses an oscillating temperature that is induced by the oscillating clearance and produces a sensor signal that is representative of the sensed temperature. The detector is coupled to the thermal sensor and is configured to detect at least one of head-medium contact and clearance using the sensor signal and the electromagnetic attraction.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology LLC
    Inventors: Daniel W. Olson, David J. Ellison, Michael Thomas Johnson
  • Apparatus and method of generating random number
    Patent number: 8996596
    Abstract: A random number generation method and apparatus are disclosed. In the random number generation method, a random number is generated using a plurality of digital signals existing in various storage devices, and thus the speed at which a random number is generated may be significantly increased.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology International
    Inventors: Jun Seok Shim, Young Sun Park
  • Non-destructive detection of slider contamination
    Patent number: 8995080
    Abstract: Apparatus and method for non-destructive detection of contamination on a slider in a data storage device. In some embodiments, the slider supports a read element adjacent a rotating data recording medium. A non-repeatable runout (NRRO) component of a position error signal (PES) obtained from readback signals transduced from the read element is extracted. A power spectral density (PSD) analysis of the NRRO component is performed to identify a peak power level, and slider contamination is detected responsive to the peak power level.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology LLC
    Inventors: James Mou, Daniel Brown, Robert German
  • Chemical pinning to direct addressable array using self-assembling materials
    Patent number: 8993060
    Abstract: A method includes: providing a substrate having a plurality of chemically contrasted alignment features, and depositing a self-assembled material on at least a portion of the substrate, wherein the position and/or orientation of substantially spherical or cylindrical domains of the self-assembled material is directed by the alignment features, to form a nanostructure pattern, and wherein the period of the alignment features is between about 2 times and about 10 times the period of the spherical or cylindrical domains. An apparatus fabricated according to the method is also provided.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology LLC
    Inventors: Shuaigang Xiao, Xiaomin Yang
  • Memory stacks management
    Patent number: 8996842
    Abstract: A method for managing a memory stack provides mapping a part of the memory stack to a span of fast memory and a part of the memory stack to a span of slow memory, wherein the fast memory provides access speed substantially higher than the access speed provided by the slow memory.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology LLC
    Inventors: Mark Gaertner, Mark Alan Heath
  • Data storage mediums and devices having bit patterned media
    Patent number: 8995073
    Abstract: Apparatuses, devices, and systems are presented with servo and data pattern formation using multi-dot arrays. In one example, an apparatus may comprise a data storage medium including a first patterned array of dots of magnetic material, a second patterned array of dots of magnetic material, and a non-magnetic space located between the first patterned array and second patterned array. In another example, a system may comprise a processor configured to store data to a data storage medium, the data storage medium including a first dot composite including a first patterned array of dots of magnetic material, a second dot composite including a second patterned array of dots of magnetic material, and a non-magnetic space located between the first dot composite and second dot composite. An order in which a dot composite and a non-magnetic space occur may define the value of one bit.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology LLC
    Inventors: Puskal Pokharel, Barmeshwar Vikramaditya, Rene Johannes Marinus Van De Veerdonk
  • Buffer management using side information
    Patent number: 8996963
    Abstract: Devices and/or methods for managing a buffer containing failed data may utilize side information related to the failed data. The side information may include, e.g., a decoding-success score representing an estimated amount of errors and/or a local host requested status for buffered or unbuffered failed data.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology LLC
    Inventors: Ara Patapoutian, Hieu Nguyen
  • Write head with floating side shields and enhanced magnetic potential
    Patent number: 8995086
    Abstract: A write head has a pole tip, a write yoke connected to the pole tip, a write return yoke, a write shield, and one or more side shields disposed in close proximity to the pole tip. The write return yoke connects to the write yoke on one end and the write shield on a different end. The one or more side shields are separated from the pole tip and write shields by a non-magnetic material and therefore are “floating” and not directly coupled to the write shield or pole tip.
    Type: Grant
    Filed: January 3, 2013
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology LLC
    Inventors: Mourad Benakli, Michael Mallary
  • Applying bias voltage during formation of granular recording media
    Patent number: 8993073
    Abstract: An embodiment of the invention relates to a perpendicular magnetic recording medium comprising (1) a substrate, (2) an interlayer comprising hexagonal columns and (3) a magnetic layer, wherein the magnetic layer is deposited applying a bias voltage to the substrate such that the magnetic layer comprises magnetic grains having substantially no sub-grains within the magnetic layer, and the magnetic layer has perpendicular magnetic anisotropy.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology LLC
    Inventors: Weilu Xu, Miaogen Lu, Mariana R. Munteanu, Michael Z. Wu, Shanghsien Alex Rou, Steve Kuo-Hsing Hwang, Ed Yen
  • Magnetic element side shield with diffusion barrier
    Patent number: 8995096
    Abstract: Various embodiments may position a side shield adjacent to and separated from a stack sidewall of a magnetic stack with the side shield having a shield layer disposed between the stack sidewall and a permanent magnet. The permanent magnet can be separated from a first portion of the shield layer by a diffusion barrier that decouples the permanent magnet from the shield layer.
    Type: Grant
    Filed: March 16, 2013
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology LLC
    Inventors: Shaun Eric McKinlay, Eric Walter Singleton
  • COMMAND EXECUTION USING EXISTING ADDRESS INFORMATION
    Publication number: 20150089119
    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 plurality of solid-state non-volatile memory cells. A controller communicates a first command having address information and a first operation code. The first operation code identifies a first action to be taken by the memory module in relation to the address information. The controller subsequently communicates a second command having a second operation code without corresponding address information. The memory module takes a second action identified by the second command using the address information from the first command.
    Type: Application
    Filed: September 23, 2013
    Publication date: March 26, 2015
    Applicant: Seagate Technology LLC
    Inventors: Kris Conklin, Bruce Dunlop, Mark Allen Gaertner, Ryan James Goss
  • MAGNETORESISTIVE SENSOR
    Publication number: 20150084624
    Abstract: Implementations disclosed herein allow a signal detected by a magnetoresistive (MR) sensor to be improved by providing for one or more alloyed layers that each include a ferromagnetic material and a refractory material. The alloyed layers are provided adjacent to a shield element or between soft magnetic layers of the sensor stack.
    Type: Application
    Filed: September 25, 2013
    Publication date: March 26, 2015
    Applicant: Seagate Technology LLC
    Inventors: Eric W. Singleton, Liwen Tan, Jae-Young Yi, Konstantin Nikolaev
  • STORAGE DEVICE WITH MULTIPLE CODING REDUNDANCIES
    Publication number: 20150089317
    Abstract: A storage device is configured to utilize different encoding and decoding schemes in reading and writing data to different regions of a storage device based on the position of the storage regions and/or component-specific physical characteristics of the regions. Each encoding scheme may include multiple different types of encoders selected based an optimization process for each region.
    Type: Application
    Filed: September 20, 2013
    Publication date: March 26, 2015
    Applicant: Seagate Technology LLC
    Inventors: Ara Patapoutian, Deepak Sridhara, Zheng Wang, Jason Charles Jury
  • MULTI-PURPOSE NEAR-FIELD TRANSDUCER HAVING A TEMPERATURE COEFFICIENT OF RESISTANCE
    Publication number: 20150085630
    Abstract: An apparatus includes a writer, an arrangement comprising a plasmonic near-field transducer (NFT) adjacent the writer and comprising a material having a temperature coefficient of resistance (TCR), and a lead arrangement connected to the NFT arrangement. In some configurations, the NFT arrangement includes a heat sink, and the lead arrangement is connected to the heat sink. In other configurations, the lead arrangement is connected directly to the NFT.
    Type: Application
    Filed: September 26, 2013
    Publication date: March 26, 2015
    Applicant: Seagate Technology LLC
    Inventors: Declan Macken, James Dillon Kiely