Patents Assigned to Seagate Technologies
  • Recording head for heat assisted magnetic recording
    Patent number: 8451555
    Abstract: An apparatus includes a waveguide having a core layer and an end adjacent to an air bearing surface, first and second poles magnetically coupled to each other and positioned on opposite sides of the waveguide, wherein the first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion toward the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the core layer of the waveguide than the first portion, and a heat sink positioned adjacent to the second portion of the first pole.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: May 28, 2013
    Assignee: Seagate Technology LLC
    Inventors: Michael Allen Seigler, Mark William Covington, Michael Leigh Mallary, Hua Zhou, Amit Vasant Itagi
  • Baseplate for use in particle analysis
    Patent number: 8448533
    Abstract: A test baseplate is configured to support and expose at least one storage device component to particle evacuation and particle analysis. The test baseplate includes a base having an upper surface that extends between an outer peripheral wall and an inner peripheral wall and having a lower surface defined by the inner peripheral wall. The test baseplate also includes a top clamp configured to be fastened to the upper surface of the base to secure the at least one storage device component to the base.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: May 28, 2013
    Assignee: Seagate Technology LLC
    Inventors: Dennis Quinto Cruz, Nathaniel Patrick Sheppleman, Carl John Naley, Tommy Joe Metzner
  • Plasmonic transducer having two metal elements with a gap disposed therebetween
    Patent number: 8451705
    Abstract: An apparatus includes a waveguide configured to deliver light to a transducer region. The apparatus also includes a plasmonic transducer that has two metal elements configured as side-by-side plates on a substrate-parallel plane with a gap therebetween. The gap is disposed along the substrate-parallel plane and has an input end disposed proximate the transducer region and an output end. The transducer is configured to provide a surface plasmon-enhanced near-field radiation pattern proximate the output end in response to the light received by the waveguide.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: May 28, 2013
    Assignee: Seagate Technology LLC
    Inventors: Chubing Peng, Kaizhong Gao, Lien Lee, Amit Vasant Itagi, Michael Allen Seigler, Yimin Niu, Sethuraman Jayashankar
  • Vertical cavity surface emitting laser with integrated mirror and waveguide
    Patent number: 8451695
    Abstract: An apparatus includes an extended cavity vertical cavity surface emitting laser producing light and having an active region, a first reflector position adjacent to a first side of the active region, an extended cavity positioned adjacent to a second side of the active region, and a second reflector reflecting a first portion of the light into the extended cavity and transmitting a second portion of the light, a planar waveguide positioned adjacent to the extended cavity vertical cavity surface emitting laser, and a horizontal coupler structured to couple the second portion of light from the extended cavity vertical cavity surface emitting laser into the waveguide.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: May 28, 2013
    Assignee: Seagate Technology LLC
    Inventor: Scott Eugene Olson
  • Outer code error correction
    Patent number: 8448045
    Abstract: Values are grouped into a first set of groupings of values. Based on inner codes, the number of groupings in the first set of groupings that have at least one erroneous value is determined. If the number of groupings in the first set of groupings that have an erroneous value is fewer than a maximum number of groupings that can be corrected by outer codes, a seek operation is begun. During the seek operation, the outer codes are used to detect and correct the erroneous values that were produced during the reading of values. In other aspects, a parity section for a data section of a data storage device is dirtied before writing any data to the data section such that if writing to the data section is interrupted, the parity section will indicate that it should not be used to correct data read from the data section.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: May 21, 2013
    Assignee: Seagate Technology LLC
    Inventors: Prafulla Bollampalli Reddy, Peter Igorevich Vasiliev, Hui Su, Timothy Richard Feldman, Mary Elizabeth Dunn, James Joseph Touchton, Bernardo Rub
  • Programmable metallization cell switch and memory units containing the same
    Patent number: 8446752
    Abstract: An electronic device that includes a first programmable metallization cell (PMC) that includes an active electrode; an inert electrode; and a solid electrolyte layer disposed between the active electrode and the inert electrode; and a second PMC that includes an active electrode; an inert electrode; and a solid electrolyte layer disposed between the active electrode and the inert electrode, wherein the first and second PMCs are electrically connected in anti-parallel.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: May 21, 2013
    Assignee: Seagate Technology LLC
    Inventors: Ming Sun, Nurul Amin, Insik Jin, Young Pil Kim, Chulmin Jung, Venugopalan Vaithyanathan, Wei Tian, Hai Li
  • Servo pattern transfer
    Patent number: 8441754
    Abstract: A servo master having a pattern capable of being magnetically transferred as a servo pattern to a magnetic recording medium, wherein the servo master is formed of a material having a magnetic anisotropic constant perpendicular to a surface of the magnetic recording medium. The magnetic transfer method can include preparing a servo master patterned with a servo pattern to be formed on a magnetic recording medium, and arranging the servo master on the magnetic recording medium and applying an external magnetic field to the servo master in a first direction perpendicular to a recording surface of the magnetic recording medium, and in a second direction parallel to the recording surface of the magnetic recording medium.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: May 14, 2013
    Assignee: Seagate Technology LLC
    Inventors: Hoo-san Lee, Sok-hyun Kong, Sung-chul Lee
  • Apparatus and method for defining laser cleave alignment
    Patent number: 8441106
    Abstract: An apparatus includes a crystalline substrate. A cleaving guide on the substrate is positioned over a cleave plane of the crystalline substrate and positioned in a known location with respect to a feature of an electronic device on the substrate. Cleaving of the substrate along the cleave plane changes a physical characteristic of the cleaving guide and measurement of the physical characteristic provides a parameter representative of the relative position of the cleave plane and the cleaving guide.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: May 14, 2013
    Assignee: Seagate Technology LLC
    Inventors: Roger L. Hipwell, Tanya J. Snyder, Scott E. Olson, Edward C. Gage
  • Grating for VCSEL coupling to a heat assisted magnetic recording head
    Patent number: 8442367
    Abstract: An apparatus includes a waveguide including a core layer having curved edges shaped to reflect light to a focal point, and a grating positioned adjacent to or imbedded in the core layer, wherein at least a portion of the grating is positioned between the curved edges and adjacent to or imbedded in a portion of the core layer that is not traversed by light reflected from the curved edges. A data storage device that includes the apparatus is also provided.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: May 14, 2013
    Assignee: Seagate Technology LLC
    Inventors: William Albert Challener, Michael Allen Seigler
  • Method and apparatus for measuring a signal
    Patent number: 8441904
    Abstract: There is disclosed a method and apparatus for measuring a signal using a measurement system. The signal has a frequency component that is to be detected by the measurement. The frequency component has a varying phase. The signal has at least one interruption thereto. The method includes: processing the signal with the measurement system to detect the frequency component in the signal and stalling the measurement system before the start of the interruption. The stall period is calculated such that the processing of the signal is resumed: i) after the end of the interruption, and ii) where there is substantially no discontinuity between the phase of the frequency component in the signal at the end of the stall and in the phase of the frequency component in the signal at the beginning of the stall.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: May 14, 2013
    Assignees: Xyratex Technology Limited, Seagate Technology LLC
    Inventors: Keith Brady, Gregory Quick
  • Memory cell with radial barrier
    Patent number: 8440330
    Abstract: Magnetic tunnel junction cells and methods of making magnetic tunnel junction cells that include a radially protective layer extending proximate at least the ferromagnetic free layer of the cell. The radially protective layer can be specifically chosen in thickness, deposition method, material composition, and/or extent along the cell layers to enhance the effective magnetic properties of the free layer, including the effective coercivity, effective magnetic anisotropy, effective dispersion in magnetic moment, or effective spin polarization.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: May 14, 2013
    Assignee: Seagate Technology, LLC
    Inventors: Paul E. Anderson, Song S. Xue
  • Data management in a data storage system
    Patent number: 8443165
    Abstract: An exemplary method includes receiving a command for storing data to a plurality of data storage resources, storing the data in a set of buffer storage locations, defining a plurality of jobs for the command, each of the plurality of jobs having an associated data operation with at least one of the data storage resources, and reallocating a subset of the buffer storage locations that stored the data for a completed job prior to completion of at least one other job.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: May 14, 2013
    Assignee: Seagate Technology LLC
    Inventors: Jonathan Williams Haines, Brett Alan Cook, Timothy Richard Feldman, Paul Michael Wiggins
  • METHOD AND APPARATUS FOR RELOCATING DATA
    Publication number: 20130117520
    Abstract: Disclosed are an apparatus and method for recycling areas of a data storage device by relocating data. In one embodiment, a method may comprise selecting a first storage area based on a quantity of obsolete data in the first storage area, moving valid data from the first storage area to a second storage area, and setting memory spaces corresponding to the first storage area as available memory for storing other data. Another embodiment may further comprise selecting a physical address-based move operation or a logical address-based move operation based on a number of sets of contiguous valid memory spaces in the first storage area, wherein the physical address-based move comprises moving data based on physical data addresses, and logical address-based moved comprises moving data based on logical block addresses.
    Type: Application
    Filed: April 27, 2012
    Publication date: May 9, 2013
    Applicant: Seagate Technology LLC
    Inventor: In Sik Ryu
  • Hard disk drive and servo track writing system for the same
    Patent number: 8437099
    Abstract: A hard disk drive includes a housing including a base member and a cover member, a spindle motor disposed in the housing, a data storage disk disposed on the spindle motor, an actuator disposed in the housing to move a read/write head to a position on the data storage disk, a clock signal providing unit disposed on the data storage disk to provide a clock signal of the data storage disk, a position signal providing unit disposed on the actuator to provide a position signal of the actuator, and first and second windows disposed in the housing to correspond to the clock signal providing unit and the position signal providing unit.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: May 7, 2013
    Assignee: Seagate Technology LLC
    Inventors: Kyung-ho Kim, Dong-ho Oh, Ha-yong Kim, Sung-joon Han, Kwang-jo Jung
  • Transducer assembly having grating slits parallel to longitudinal axis of waveguide
    Patent number: 8437229
    Abstract: An apparatus having a transducer assembly that includes a waveguide having first and second cladding layers and a core layer between the first and second cladding layers, and a grating structured to couple electromagnetic radiation into the waveguide. The grating has a plurality of elongated slits that are substantially parallel to a longitudinal axis of the waveguide. The apparatus further has a light source mounted adjacent the waveguide to direct light onto the grating.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: May 7, 2013
    Assignee: Seagate Technology LLC
    Inventor: Michael Allen Seigler
  • Programmable resistive memory cell with sacrificial metal
    Patent number: 8435827
    Abstract: Programmable metallization memory cells include an electrochemically active electrode and an inert electrode and an ion conductor solid electrolyte material between the electrochemically active electrode and the inert electrode. A sacrificial metal is disposed between the electrochemically active electrode and the inert electrode. The sacrificial metal has a more negative standard electrode potential than the filament forming metal.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: May 7, 2013
    Assignee: Seagate Technology LLC
    Inventors: Venkatram Venkatasamy, Ming Sun, Dadi Setiadi
  • Logical block storage in a storage device
    Patent number: 8438361
    Abstract: In general, this disclosure relates to storage of logical blocks in a storage device. Aspects of this disclosure describe techniques to monitor the frequency of access of one or more logical blocks referenced by one or more logical block addresses. Based on the frequency of access, in non-limiting aspects of this disclosure, a controller may select one or more physical blocks of a common memory storage block. The storage device may store the logical blocks in the selected physical blocks.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: May 7, 2013
    Assignee: Seagate Technology LLC
    Inventors: Ryan J. Goss, Kevin Gomez, Mark Allen Gaertner
  • Decoder and apparatuses including the same
    Patent number: 8438458
    Abstract: A decoder includes a first decoder configured to iteratively decode input data, accumulate iteratively decoded data in bit units, compare an accumulated value obtained for each bit of the iteratively decoded data with a plurality of reference values, and output decision data and indicator data according to a comparison result. The decoder includes a second decoder configured to perform error correction on a symbol including the decision data according to the indicator data.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: May 7, 2013
    Assignee: Seagate Technology International, LLC
    Inventor: Joo Hyun Lee
  • Restricted erase and unlock of data storage devices
    Patent number: 8438652
    Abstract: A data storage device in which access to user data is restricted. The data storage device includes a data memory having memory locations that store user data. The device also has a program memory. The program memory includes first program code that enables a user to create a first device security ID and thereby restrict access to the stored data. Second program code, also included in the program memory, is capable of receiving a security command and comparing a second device security ID associated with the received security command to a stored security key. If the second device security ID and the stored security key correspond, then authentication with the first device security ID is bypassed and access is provided to the stored data.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: May 7, 2013
    Assignee: Seagate Technology LLC
    Inventors: Robert E. Weinstein, Monty A. Forehand
  • Magnetic sensor with composite magnetic shield
    Patent number: 8437105
    Abstract: A magneto-resistive reader includes a first magnetic shield element, a second magnetic shield element and a magneto-resistive sensor stack separating the first magnetic shield element from the second magnetic shield element. The first shield element includes two ferromagnetic anisotropic layers separated by a grain growth suppression layer.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: May 7, 2013
    Assignee: Seagate Technology LLC
    Inventors: Vladyslav Alexandrovich Vas'ko, Venkateswara Rao Inturi, Michael C. Kautzky, Zhihong Lu, Mark T. Kief, Yifan Zhang