Patents Assigned to Seagate Technologies
  • RECORDING HEAD WITH PIEZOELECTRIC CONTACT SENSOR
    Publication number: 20150124355
    Abstract: Example embodiments include an apparatus that has a piezoelectric contact sensor. The piezoelectric contact sensor includes a semiconductor device having a semiconductor material that defines a channel through which current can flow. The piezoelectric contact sensor also includes a piezoelectric element coupled to the semiconductor material. The semiconductor material is configured to modulate the current channel in response to compressive stress waves at the contact sensor. Other example embodiments include an apparatus that has a slider having an air-bearing surface, a write head integral to the slider, and a piezoelectric contact sensor that includes a semiconductor device and a piezoelectric element.
    Type: Application
    Filed: November 1, 2013
    Publication date: May 7, 2015
    Applicant: Seagate Technology LLC
    Inventors: David J. Ellison, Michael Christopher Kautzky, Jorge Hanchi
  • Adaptive Fastener Access Tool
    Publication number: 20150127138
    Abstract: A tool may be configured at least with a fastener that can be accessed with a shaped bit. A controller portion of the tool can be arranged to predict bit deflection that enables a tool configuration to be adapted in response to actual bit deflection to conform to the predicted bit deflection.
    Type: Application
    Filed: November 4, 2013
    Publication date: May 7, 2015
    Applicant: Seagate Technology LLC
    Inventors: Shawn A. Ruden, Kevin J. Spiczka, Brad E. Rowell
  • Applying a bias signal to memory cells to reverse a resistance shift of the memory cells
    Patent number: 9025359
    Abstract: Data is written to cells of a resistance-based, non-volatile memory. An activity metric is tracked since the writing of the data to the cells. In response to the activity metric satisfying a threshold, a bias signal is applied to the cells to reverse a resistance shift of the cells.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: May 5, 2015
    Assignee: Seagate Technology LLC
    Inventors: Ara Patapoutian, Antoine Khoueir, Ryan James Goss, Jon D. Trantham
  • Method of optimizing solid state drive soft retry voltages
    Patent number: 9025393
    Abstract: A method of optimizing solid state drive (SSD) soft retry voltages comprises limiting a number of voltage reads and properly spacing and determining the reference voltage at which each voltage is read based on desired Bit Error Rate (BER) and channel throughput. The method determines each reference voltage for a number of soft retry voltage reads based on a hard decision read. The spacing between each read reference voltage is constant since each SSD type requires a number of reads for an accurate presentation of soft retry voltages. The voltage distance between each successive read is limited to a multiple of the constant spacing while the multiple is based on success or failure of the first read. The method determines a limited number of reads, the constant spacing between reads, and a desired reference voltage for each read, thereby increasing valuable throughput of the channel and decreasing BER.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: May 5, 2015
    Assignee: Seagate Technology LLC
    Inventors: Yunxiang Wu, Zhengang Chen, YingQuan Wu, Ning Chen
  • Shock protection for electro-mechanical devices of host devices employing inertial navigation systems
    Patent number: 9025272
    Abstract: A shock protected electronic device comprising a position receiver, an electromechanical device, a position process, and a protect process. The position receiver generates at least one position signal. The motion sensor generates at least one motion signal. The electromechanical device operates in a normal mode and a protect mode. The position process generates position data indicative of a position of the shock protected electronic device based on at least one of the position signal and the at least one motion signal. The protect process generates a protect signal based on the at least one motion signal. The electromechanical device enters the protect mode when the protect process generates the protect signal.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: May 5, 2015
    Assignee: Seagate Technology LLC
    Inventor: Benjamin M. Chang
  • Magnetic device including a near field transducer
    Patent number: 9025281
    Abstract: A recording device and a method of forming a recording device are disclosed. The recording device includes an air bearing surface and a near field transducer including a surface proximate the air bearing surface. The device also includes a write pole including a sloped pole piece proximate the near field transducer, where the sloped pole piece includes an end proximate the air bearing surface; a capping material disposed proximate the surface of the near field transducer; and an overcoat layer disposed proximate the capping material and at least a portion of the air bearing surface of the recording device.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: May 5, 2015
    Assignee: Seagate Technology LLC
    Inventors: Edwin F. Rejda, Kurt W. Wierman
  • Command execution using existing address information
    Patent number: 9026699
    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: Grant
    Filed: September 23, 2013
    Date of Patent: May 5, 2015
    Assignee: Seagate Technology LLC
    Inventors: Kris Conklin, Bruce Dunlop, Mark Allen Gaertner, Ryan James Goss
  • LAYERED SYNTHETIC ANTI-FERROMAGNETIC UPPER SHIELD
    Publication number: 20150116868
    Abstract: A magneto-resistive (MR) sensor may include a variety of individual functional layers whereby an electrical resistance throughout the layers of the sensor stack varies according to the polarity of a pinned layer within the sensor stack. A layered synthetic anti-ferromagnetic (SAF) upper shield of the MR sensor includes an upper SAF layer and a lower SAF layer separated by a shield anti-ferromagnetic (AFM) layer. The lower SAF layer is in contact with a side shield of the MR sensor, which provides a side shield biasing field to the MR sensor. The upper SAF layer separates the lower SAF layer from a top shield and/or domain control structure (DCS) magnet(s) of the MR sensor and shields the lower SAF layer and the sensor stack from DCS stray field(s), thereby reducing noise.
    Type: Application
    Filed: October 30, 2013
    Publication date: April 30, 2015
    Applicant: Seagate Technology LLC
    Inventors: Zhengqi Lu, Daniel Hassett, Paula McElhinney, Jiansheng Xu
  • DERIVING AN OPERATIONAL STATE OF A DATA CENTER USING A PREDICTIVE COMPUTER ANALYSIS MODEL
    Publication number: 20150120636
    Abstract: Performance of a data center is predicted using a computer analysis model. Operational measurements of components of computing nodes of the data center are received as input to the computer analysis model. An operational state of the data center is derived via the computer analysis model responsive to the operational measurements.
    Type: Application
    Filed: October 29, 2013
    Publication date: April 30, 2015
    Applicant: Seagate Technology LLC
    Inventor: Kaizhong Gao
  • Data Storage Device with HGSA Offset Compensation
    Publication number: 20150116862
    Abstract: A data storage device may be configured at least with an actuating assembly that has a head-gimbal suspension assembly (HGSA), first pivot point, and second pivot point. The head-gimbal assembly can be constructed and operated with at least first and second transducers aligned along a longitudinal axis of the head-gimbal suspension assembly. A controller may be adopted to manipulate the head-gimbal suspension assembly about at least one of the pivot points in response to a head-gimbal suspension assembly offset misalignment to compensate for such an offset.
    Type: Application
    Filed: October 29, 2013
    Publication date: April 30, 2015
    Applicant: Seagate Technology LLC
    Inventors: Tzung-Sz Shen, Chih-Wu Jen
  • NEAR-FIELD TRANSDUCER WITH ROUNDED OR OBTUSE CORNERS
    Publication number: 20150117169
    Abstract: Embodiments are directed to an apparatus having an air-bearing surface that is configured to interact with magnetic medium. The apparatus includes a waveguide and a plasmonic near-field transducer positioned at or near the air-bearing surface. The plasmonic near-field transducer is operatively coupled to the waveguide. The plasmonic near-field transducer includes an enlarged region and a peg region. The peg region extends from the enlarged region towards the air-bearing surface. The peg region has at least a portion of a periphery of its cross-sectional shape include curvature or at least one substantially obtuse angle.
    Type: Application
    Filed: October 24, 2013
    Publication date: April 30, 2015
    Applicant: Seagate Technology LLC
    Inventors: Michael Christopher Kautzky, James Gary Wessel, Mark Ostrowski, Tae-Woo Lee
  • SPIN TRANSPORT SENSOR
    Publication number: 20150116870
    Abstract: The implementations disclosed herein provide for a spin transport sensor including a synthetic antiferromagnet (SAF) adjacent a shield element. The SAF extends to an air-bearing surface (ABS) and provides a current path from a current source to an ABS-region of a spin conductor layer. Spin current diffuses from the spin conductor layer to an adjacent free layer, which generates a measurable electrical voltage in a free layer of the spin transport sensor. The SAF serves as both a magnetic shield and a spin injector to the spin conductor layer.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 30, 2015
    Applicant: Seagate Technology LLC
    Inventors: Eric Walter Singleton, Zhiguo Ge
  • Magnetic element electrode lamination
    Patent number: 9017832
    Abstract: Various embodiments may be generally directed to a magnetic element capable of optimized magnetoresistive data reading. Such a magnetic element may be configured at least with a magnetoresistive stack that has an electrode lamination having at least a transition metal layer disposed between a magnetically free layer of the magnetoresistive stack and an electrode layer of the electrode lamination.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: April 28, 2015
    Assignee: Seagate Technology LLC
    Inventors: Eric Walter Singleton, Liwen Tan, Jae-Young Yi
  • Flash memory read error recovery with soft-decision decode
    Patent number: 9021332
    Abstract: An apparatus having a circuit and one or more processor is disclosed. The circuit is configured to receive a codeword from a memory. The memory is nonvolatile. The codeword generally has one or more errors. The processors are configured to generate read data by decoding the codeword repeatedly. The decoding includes a soft-decision decoding that uses a plurality of parameters calculated by (i) a first procedure, (ii) a second procedure in response to a plurality of failures of the decoding to converge using the first procedure and (iii) a third procedure in response to another failure of the decoding to converge using the second procedure.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: April 28, 2015
    Assignee: Seagate Technology LLC
    Inventors: Erich F. Haratsch, Jeremy Werner, Zhengang Chen, Earl T. Cohen, Yunxiang Wu, Ning Chen
  • Apparatus with a plurality of heat sinks
    Patent number: 9019661
    Abstract: An apparatus comprises a write transducer comprising a write pole having a tip portion proximate a media-facing surface and a return pole spaced apart from the write pole in a downtrack direction. The apparatus further includes first and second heat sink portions. The first heat sink portion surrounds a first side of the tip portion that faces the return pole and extends outwards from the tip portion in a cross-track direction. The second heat sink portion comprises a first surface proximate the first heat sink portion and a second surface proximate the return pole and extends outwards in the cross-track direction further than the first heat sink portion.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: April 28, 2015
    Assignee: Seagate Technology LLC
    Inventors: Chris Rea, Zoran Jandric, Hua Zhou
  • Submount assembly integration
    Patent number: 9018737
    Abstract: In accordance with one embodiment, an apparatus is disclosed that comprises a submount operable to integrate with a laser as a laser submount assembly; a predetermined portion of the submount configured to bond with the laser; a bonding pad positioned on the predetermined portion of the submount for integrating the laser with the submount.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: April 28, 2015
    Assignee: Seagate Technology LLC
    Inventors: Lijuan Zhong, Edward Charles Gage
  • Write pole with varying bevel angles
    Patent number: 9019659
    Abstract: A magnetic element can have at least a write pole configured with a write pole tip that has a tip surface oriented at a first angle with respect to an air bearing surface (ABS), a first bevel surface extending from the ABS and oriented at a second angle with respect to the ABS, and a second bevel surface extending from the ABS and oriented at a third angle with respect to the ABS. The first, second, and third angles may be configured to be different and non-orthogonal to each other.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: April 28, 2015
    Assignee: Seagate Technology LLC
    Inventors: Huaqing Yin, Wei Tian, Zhe Shen, Kirill Rivkin, Jianhua Xue
  • Heat assisted magnetic recording device with pre-heated write element
    Patent number: 9019646
    Abstract: An apparatus includes a write element configured to apply a magnetic field to write data on a portion of a heat-assisted magnetic recording media in response to an energizing current. An energy source is configured to heat the portion of the media being magnetized by the write element. A preheat energizing current is applied to the write element during an interval before writing the data to the portion of the media. The preheat energizing current does not cause data to be written to the media and brings at least one of the write element and driver circuitry into thermal equilibrium prior to writing the data on the portion.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: April 28, 2015
    Assignee: Seagate Technology LLC
    Inventors: Tim Rausch, Jon D. Trantham, John West Dykes, Housan Dakroub, Charles Paul Henry, Edward Charles Gage, Raul Horacio Andruet, James Gary Wessel, James Dillon Kiely, Bruce Douglas Buch, Barmeshwar Vikramaditya
  • Multi-stage actuator with writer position determination capability
    Patent number: 9019650
    Abstract: Apparatus and method for determining a position of a writer supported by a multi-stage actuator. In some embodiments, the apparatus includes a multi-stage actuator which supports a transducer adjacent a data recording surface. The multi-stage actuator has a coarse actuator and a microactuator. The transducer includes a write element and a read element. A controller is adapted to determine a position of a write element of the transducer with respect to the data recording surface responsive to a position of a read element of the transducer and a displacement distance of the microactuator away from a neutral position.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: April 28, 2015
    Assignee: Seagate Technology LLC
    Inventors: Ximin Shan, Jye Kai Chang, Sandeep Sequeira
  • Read channel throughput management
    Patent number: 9019640
    Abstract: An implementation of a system disclosed herein provides a method of deferring decoding of a data sector received at a read channel of a storage device, in response to determining that a data sector cannot be decoded by a first decoder and storing the data sector for further processing by a second decoder.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: April 28, 2015
    Assignee: Seagate Technology LLC
    Inventors: Prafulla Bollampalli Reddy, Hui Su, Michelle Elaine Blankenship, Eddie Wai Pun, John Marc Wright, Ara Patapoutian, Hieu V. Nguyen