Patents Assigned to Seagate Technologies
  • CORROSION RESISTANT COATING FOR COPPER SUBSTRATE
    Publication number: 20130252018
    Abstract: A protecting coating for a copper substrate is disclosed. The coating comprises seed layer comprising titanium ions that forms an “alloy-like” structure with the copper substrate. The coating further comprises a first layer of carbon disposed on the seed layer comprising titanium ions. A second layer comprising titanium is disposed on the first layer of carbon, and a second layer of carbon is disposed on the second layer comprising titanium.
    Type: Application
    Filed: May 28, 2013
    Publication date: September 26, 2013
    Applicant: Seagate Technology LLC
    Inventors: Yongping Gong, Kristoffer Steven Scheponik
  • Servo Grey Code Error Correction
    Publication number: 20130250448
    Abstract: The disclosure is related to systems and methods for servo Gray code error detection and correction. A device may include a circuit configured to 1) selectively implement a quality-based error correction system to determine an error in the servo Gray code and correct the error; 2) selectively implement a trajectory-based error correction system to determine an error in the servo Gray code and correct the error; or 3) implement any combination of a quality-based error correction system and a trajectory-based error correction system to determine an error in the servo Gray code and correct the error.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 26, 2013
    Applicant: Seagate Technology LLC
    Inventors: Mustafa Can Ozturk, Puskal Prasad Pokharel, Barmeshwar Vikramaditya, Patrick John Korkowski
  • Non-volatile memory cell with lateral pinning
    Patent number: 8541247
    Abstract: An apparatus and associated method for a non-volatile memory cell, such as an STRAM cell. In accordance with various embodiments, a magnetic free layer is laterally separated from an antiferromagnetic layer (AFM) by a non-magnetic spacer layer and medially separated from a synthetic antiferromagnetic layer (SAF) by a magnetic tunneling junction. The AFM pins the magnetization of the SAF through contact with a pinning region of the SAF that laterally extends beyond the magnetic tunneling junction.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: September 24, 2013
    Assignee: Seagate Technology LLC
    Inventors: Haiwen Xi, Antoine Khoueir, Brian Lee, Patrick J. Ryan
  • Staggered magnetic tunnel junction
    Patent number: 8537607
    Abstract: A staggered magnetic tunnel junction includes a free magnetic layer extending in a lateral direction between a first end portion and an opposing second end portion and a tunneling barrier disposed between a reference magnetic layer and the first end portion and forming a magnetic tunnel junction. Current flows through the free magnetic layer in the lateral direction to switch the magnetic tunnel junction between a high resistance state and a low resistance state.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: September 17, 2013
    Assignee: Seagate Technology LLC
    Inventor: Xiaohua Lou
  • Rights object authentication in anchor point-based digital rights management
    Patent number: 8539240
    Abstract: Digital lights management (DRM) can be effectively implemented through use of an anchor point and binding records in a user domain. Furthermore, authentication of a rights object defining the scope of access allowed for a digital property instance may be achieved through use of a signing key in the anchor point. The signing key may be used to assure no tampering has occurred with the rights object since acquisition of a digital property instance. A digital property owner may gain additional functionality and control through implementation of a play counter, rental duration limit, etc., using a signing key.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: September 17, 2013
    Assignee: Seagate Technology LLC
    Inventor: Paul Marvin Sweazey
  • Dual stage sensing for non-volatile memory
    Patent number: 8537587
    Abstract: A method and apparatus for accessing a non-volatile memory cell. In some embodiments, a memory block provides a plurality of memory cells arranged into rows and columns. A read circuit is configured to read a selected row of the memory block by concurrently applying a control voltage to each memory cell along the selected row and, for each column, using a respective local sense amplifier and a column sense amplifier to successively differentiate a voltage across the associated memory cell in said column to output a programmed content of the row.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: September 17, 2013
    Assignee: Seagate Technology LLC
    Inventors: Hai Li, Yiran Chen, Yuan Yan, Brian Lee, Ran Wang
  • Compensation for vibration in a data storage system
    Patent number: 8537485
    Abstract: A plurality of sensors are used to sense disturbances in a data storage system. An adaptive gain component is associated with each of the sensors and provides a gain for each of the sensor signals. The gain of each sensor signal is adapted, individually, based on a correlation of each given sensor signal to the position error signal. This adaptation produces a position correction signal. The position correction signal is applied to a position signal that is used to position the reading and writing components and the storage medium relative to one another. This compensates for both rotary and linear vibration disturbances at the same time.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: September 17, 2013
    Assignee: Seagate Technology LLC
    Inventors: Jeffrey Vincent DeRosa, Bin Huang, Chiyun Xia, John Lowell Zeller, Peng Yan
  • Heat source management in data storage device
    Patent number: 8537644
    Abstract: An apparatus and associated method is presently disclosed for a control circuitry capable of managing a heat source used in data storage applications. Various embodiments of the present invention are generally directed to a heat source directed at a data storage medium with a synchronization signal and a serial interface that are each selectively activated via a demultiplexed write gate signal. The selective activation allows for pulsed operation of the heat source resulting in reduced duty cycle and temperature during a write operation.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: September 17, 2013
    Assignee: Seagate Technology LLC
    Inventors: Michael Henry Lennard, Robert Matousek
  • Write head with modified side shields
    Patent number: 8537501
    Abstract: A write head, the write head having an air bearing surface, the write head including a magnetic write pole, wherein at the air bearing surface, the write pole has a trailing surface, a leading surface that is opposite the trailing surface, and first and second surfaces; a trailing shield proximate the trailing surface of the magnetic write pole; first and second gaps proximate the first and second surfaces of the magnetic write pole; first and second side shields proximate the first and second gaps, each of the first and second side shields having a trailing shield surface; and first and second antiferromagnetic-coupling layers positioned between the trailing shield surfaces of the first and second side shields and the trailing shield.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: September 17, 2013
    Assignee: Seagate Technology LLC
    Inventors: Mourad Benakli, Kirill Aleksandrovich Rivkin, James Gary Wessel, Dehua Han, Huaqing Yin, Scott Franzen, Jianhua Xue
  • Apparatus for fluid recirculation
    Patent number: 8534919
    Abstract: A system, method and means is provided for withstanding mechanical shock for use with fluid dynamic bearings. A sealing system is provided that withstands 1000 G shock events. In an aspect, a grooved pumping seal employed between a thrust plate and a shield, a thrust plate having spiral grooves, a fluid recirculation passageway, and a reservoir creates an asymmetric pressure gradient. In an aspect, fluid is retained and air is purged utilizing an enlarged fluid reservoir, axial channels and an angled fill hole. In an aspect, a shaft is attached to a top cover supplying radial stiffness, and an enlarged single-sided thrust plate improves dynamic parallelism.
    Type: Grant
    Filed: September 15, 2012
    Date of Patent: September 17, 2013
    Assignee: Seagate Technology LLC
    Inventors: Lynn Bich-Quy Le, Alan Lyndon Grantz
  • SEAL-TYPE LABEL TO CONTAIN PRESSURIZED GAS ENVIRONMENT
    Publication number: 20130235488
    Abstract: In accordance with certain embodiments, a housing includes a first housing component having a through hole covered by a first seal at one end of the through hole. The housing also includes a second seal that covers the first seal. In accordance with certain embodiments, a housing maintains a low density gas. The housing includes a fastening means for attaching a cover to a base, a first sealing means for sealing a through hole in the housing, and a second sealing means for inhibiting diffusion of the low-density gas through the first sealing means.
    Type: Application
    Filed: April 19, 2013
    Publication date: September 12, 2013
    Applicant: Seagate Technology LLC
    Inventors: Thomas G. Andrikowich, Michael C. Strzepa
  • Semiconductor laser with test pads
    Patent number: 8532156
    Abstract: A laser diode includes a junction surface configured to interface with an integrated optics slider. Cathode and anode electrical junctions are disposed on the junction surface. The cathode and anode electrical junctions are configured for electrical and mechanical coupling to the integrated optics slider. At least one test pad is disposed on the junction surface that is physically separate from and electrically coupled to one of the cathode and anode electrical junctions. The test pad is configured to be contacted by a test probe and is not configured for electrical or mechanical coupling to the integrated optics slider.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: September 10, 2013
    Assignee: Seagate Technology LLC
    Inventor: Scott Olson
  • Magnetic structure free layer stabilization
    Patent number: 8531802
    Abstract: A magnetic layered structure is presently disclosed comprising a pinned layer, a first anti-ferromagnetic layer that defines a magnetic orientation of the pinned layer, a free layer, a second anti-ferromagnetic layer that biases the free layer to a magnetic orientation approximately perpendicular to the magnetic orientation of the pinned layer, and a tuning layer positioned between and in contact with the second anti-ferromagnetic layer and the free layer that tunes free layer bias to a desired level.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: September 10, 2013
    Assignee: Seagate Technology LLC
    Inventors: Antonia Tsoukatos, Eric Walter Singleton
  • Capping method for laser diode protection
    Patent number: 8532157
    Abstract: A method includes: positioning a laser in the cavity in an end of a slider, wherein the laser has an output facet positioned adjacent to a first wall of the cavity to define a first gap between the output facet and the first wall of the cavity, and filling at least a portion of the first gap adjacent to the output facet. An apparatus including a slider including a cavity in a trailing end of the slider, a laser positioned in the cavity and having an output facet positioned adjacent to a first wall of the cavity to define a first gap between the output facet and the first wall of the cavity, and a sealing material filling at least a portion of the first gap adjacent to the output facet is also provided.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: September 10, 2013
    Assignee: Seagate Technology LLC
    Inventors: Douglas Cole, Lijuan Zhong, Roger Lee Hipwell, Jr., Joseph Michael Stephan, Scott Eugene Olson, Tanya Jegeris Snyder, Yongjun Zhao
  • Head gimbal assembly with contact detection
    Patent number: 8531799
    Abstract: An apparatus and associated method for a head gimbal assembly (HGA) that detects a contact event. Various embodiments of the present invention are generally directed to a load beam coupled to a plate via a gimbal. The plate has a cantilevered ramp limiter which extends forward from the gimbal to engage a ramp load/unload structure. A slider is affixed to a lower surface of the plate opposite the gimbal while a strain gage is affixed to the ramp limiter.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: September 10, 2013
    Assignee: Seagate Technology LLC
    Inventor: Michael Allen Greminger
  • Unipolar spin-transfer switching memory unit
    Patent number: 8531876
    Abstract: A memory unit includes a magnetic tunnel junction data cell electrically coupled to a bit line and a word line. The magnetic tunnel junction data cell is configured to switch between a high resistance state and a low resistance state by passing a unipolar voltage across the magnetic tunnel junction data cell. A diode is electrically coupled between the magnetic tunnel junction data cell and the word line or bit line. A voltage source provides the unipolar voltage across the magnetic tunnel junction data cell that writes the high resistance state and the low resistance state.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: September 10, 2013
    Assignee: Seagate Technology LLC
    Inventors: Xiaohua Lou, Haiwen Xi
  • Data encryption to provide data security and memory cell bit wear leveling
    Patent number: 8526605
    Abstract: Method and apparatus for encrypting and storing data to provide data security and memory cell bit wear leveling. In accordance with various embodiments, input data are provided for writing to a target page of memory in a storage array. A seed value is derived from a count value indicative of a number of times a write access has occurred on the target page of memory. A block encryption routine is applied to the input data using the seed value to generate encrypted output data that are thereafter written to the target page.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: September 3, 2013
    Assignee: Seagate Technology LLC
    Inventor: Donald Preston Matthews, Jr.
  • Data storage using virtual addressing
    Patent number: 8527735
    Abstract: Provided are a data storage medium accessing method of accessing a data storage medium of a data storage device according to a virtual address (VA), the data storage device to access the data storage medium according to the VA, and a computer readable recording medium having recorded thereon a program to access the data storage medium accessing method.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: September 3, 2013
    Assignee: Seagate Technology International
    Inventors: In-sik Ryu, Moon-chol Park, Se-wook Na, Jae-sung Lee
  • Detection system using heating element temperature oscillations
    Patent number: 8523312
    Abstract: A data storage system includes a recording head and a compensating resistor. The recording head has a heating element. The compensating resistor is in electrical series with the heating element and is external to the recording head. A method includes applying an alternating current at a first angular frequency to a recording head. A voltage drop across the recording head heating element is measured. A component of the voltage drop is extracted. The component has a frequency that is three times the frequency of the first angular frequency.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: September 3, 2013
    Assignee: Seagate Technology LLC
    Inventors: Xuan Zheng, Timothy William Stoebe
  • Reverse flow preventer unit
    Patent number: 8526140
    Abstract: Disclosed are a slider for a memory device and a memory device having the same. The slider for a memory device includes a slider body configured to fly over the surface of a medium at a particular height; and a reverse flow preventing unit disposed at part of the slider body adjacent to a trailing edge of the slider body and configured to prevent a reverse flow of air between the medium and the slider body.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: September 3, 2013
    Assignee: Seagate Technology LLC
    Inventor: Hyun Ki Kim