Patents Assigned to Seagate Technologies
  • Log structured reserved zone for a data storage device
    Patent number: 9880926
    Abstract: A circuit may be configured to store data to a reserved zone of a non-volatile solid state memory (NVSSM) in a log structured manner and to use information stored in the reserved zone to restore data as needed. In some embodiments, a reserved area of a NVSSM may include die from one or more non-volatile memory modules, which can be divided into blocks and the blocks can be combined to form frames. In some examples, the frames may contain frame headers that can contain a unique identifier which can indicate which frame is to be used to restore data structures, such as during power up or for other restore events.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: January 30, 2018
    Assignee: Seagate Technology LLC
    Inventor: Sumanth Jannyavula Venkata
  • Recovering user data from a variably encroached data track
    Patent number: 9875763
    Abstract: Method and apparatus for recovering user data from a rotatable data recording medium. In some embodiments, a moveable read element detects at least one uncorrectable read error in user data stored in a data sector arranged along a concentric track. A read retry operation is carried out to recover the user data by radially advancing the moveable read element from a first offset value to a different second offset value with respect to the track in accordance with a trajectory profile while transducing the user data from the data sector. This allows data that are variably overwritten (encroached upon) by different radial amounts from an adjacent track to be recovered.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: January 23, 2018
    Assignee: Seagate Technology LLC
    Inventors: Jason C. Jury, Siong Liu, Joshua W. Christensen
  • Stabilization of one or more upper sensors in multi-sensor readers
    Patent number: 9870791
    Abstract: A multi-sensor reader that includes a first sensor that has a first sensor stack, which includes a sensing layer that has a magnetization that changes according to an external magnetic field. The first sensor also includes a first seed layer below the first sensor stack. The multi-sensor reader also includes a second sensor stacked over the first sensor. The second sensor includes a second sensor stack, which includes a sensing layer that has a magnetization that changes according to the external magnetic field. The second sensor also includes a second seed layer below the second sensor stack. A stabilization element is included to maintain a magnetization direction of the second seed layer and to stabilize the second seed layer.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: January 16, 2018
    Assignee: Seagate Technology LLC
    Inventors: Victor Sapozhnikov, Steven P. Bozeman, Mohammed Shariat Ullah Patwari, LiWen Tan, Jae Young Yi, Eric W. Singleton
  • Materials for near field transducers and near field transducers containing same
    Patent number: 9870793
    Abstract: A method of forming a near field transducer (NFT) layer, the method including depositing a film of a primary element, the film having a film thickness and a film expanse; and implanting at least one secondary element into the primary element, wherein the NFT layer includes the film of the primary element doped with the at least one secondary element.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: January 16, 2018
    Assignee: Seagate Technology LLC
    Inventors: Sethuraman Jayashankar, Michael C. Kautzky
  • Photon emitter array including photon emitters with different orientations
    Patent number: 9869639
    Abstract: Provided herein is an apparatus including a photon emitter array. The photon emitter array includes a number of photon emitters selectively oriented in a number of polarized orientations. The photon emitters are configured to controllably emit photons onto a surface of an article. The apparatus also includes a photon detector positioned to receive photons scattered from features on the surface of the article. The photon detector simultaneously receives photons oriented in the number of polarized orientations. In addition, the photon detector provides information for mapping the features on the surface of the article.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: January 16, 2018
    Assignee: Seagate Technology LLC
    Inventors: Joachim Walter Ahner, David Marcus Tung
  • Recessed AFM stitch interface engineering
    Patent number: 9870790
    Abstract: A read sensor and fabrication method thereof. The method includes forming a bottom stack that includes an antiferromagnetic (AFM) layer, a lower ferromagnetic stitch layer above the AFM layer and a sacrificial cap layer on the lower ferromagnetic stitch layer. The sacrificial cap layer is formed of a material that alloys magnetically with the lower ferromagnetic stitch layer. The method further includes substantially removing the sacrificial cap layer. After substantially removing the sacrificial layer, an upper ferromagnetic stitch layer is deposited on the lower ferromagnetic stitch layer of the bottom stack to form a stitch interface that provides relatively strong magnetic coupling between the lower ferromagnetic stitch layer of the bottom stack and the upper ferromagnetic stitch layer.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: January 16, 2018
    Assignee: Seagate Technology LLC
    Inventors: Sameh Hassan, Yuqing Du, Marcus Ormston, Denis O'Donnell, Kevin McNeill
  • INDEPENDENT READ THRESHOLD VOLTAGE TRACKING FOR MULTIPLE DEPENDENT READ THRESHOLD VOLTAGES USING SYNDROME WEIGHTS
    Publication number: 20180012663
    Abstract: Independent read threshold voltage tracking techniques are provided for multiple dependent read threshold voltages using syndrome weights.
    Type: Application
    Filed: June 30, 2017
    Publication date: January 11, 2018
    Applicant: Seagate Technology LLC
    Inventors: AbdelHakim S. Alhussien, Sundararajan Sankaranarayanan, Erich F. Haratsch
  • ADAPTIVE READ THRESHOLD VOLTAGE TRACKING WITH BIT ERROR RATE ESTIMATION BASED ON NON-LINEAR SYNDROME WEIGHT MAPPING
    Publication number: 20180011753
    Abstract: Adaptive read threshold voltage tracking techniques are provided that employ bit error rate estimation based on a non-linear syndrome weight mapping. An exemplary device comprises a controller configured to determine a bit error rate for at least one of a plurality of read threshold voltages in a memory using a non-linear mapping of a syndrome weight to the bit error rate for the at least one of the plurality of read threshold voltages.
    Type: Application
    Filed: June 30, 2017
    Publication date: January 11, 2018
    Applicant: Seagate Technology LLC
    Inventors: AbdelHakim S. Alhussien, Sundararajan Sankaranarayanan, Erich F. Haratsch
  • Devices including a near field transducer (NFT) including peg and disc from different materials
    Patent number: 9865283
    Abstract: Devices that have an air bearing surface (ABS), the device includes a near field transducer (NFT) that includes a disc configured to convert photons incident thereon into plasmons; and a peg configured to couple plasmons coupled from the disc into an adjacent magnetic storage medium, wherein the disc includes a disc material that includes gold or an alloy thereof and the peg includes a peg material, wherein the disc material is different from the peg material and wherein the peg material has a real part of the permittivity that is not greater than that of gold.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: January 9, 2018
    Assignee: Seagate Technology LLC
    Inventors: Martin Blaber, Tong Zhao, Michael C. Kautzky, Justin Brons, John C. Duda, Yuhang Cheng, Michael A. Seigler
  • Reflective surfaces for surface features of an article
    Patent number: 9863876
    Abstract: Provided herein is an apparatus including a photon emitter configured for reflecting photons from a surface of an article onto a first reflective surface. In addition, a second reflective surface is configured for reflecting photons from the surface of the article back onto the surface of the article. The apparatus also includes a detector configured to provide information corresponding to photons scattered from features of the article.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: January 9, 2018
    Assignee: Seagate Technology LLC
    Inventors: Joachim W. Ahner, David M. Tung, Stephen Keith McLaurin, Travis W. Grodt
  • Servo integrated BPM template
    Patent number: 9865294
    Abstract: Provided herein is a method including forming a data zone guiding pattern and forming a servo zone guiding pattern. A servo pattern and a data pattern are simultaneously formed. Directed self-assembly of block copolymers is guided by the data zone guiding pattern and the servo zone guiding pattern.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: January 9, 2018
    Assignee: Seagate Technology LLC
    Inventors: ShuaiGang Xiao, XiaoMin Yang, David S. Kuo, Kim Yang Lee, Yautzong Hsu
  • Selectable magnetic writers of different target geometries for reducing performance variance
    Patent number: 9865301
    Abstract: A method of forming a recording head for use with a data storage medium in a data storage device. The method includes forming first and second writers of different target geometries. A first recording measurement is performed on one or more storage media using the first writer. A second recording measurement is performed on the one or more storage media using the second writer. Based on a comparison of the first and second recording measurements to a predetermined quantity, either the first writer or the second writer is selected to be operational in the data storage device.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: January 9, 2018
    Assignee: Seagate Technology LLC
    Inventors: Kurt Wiesen, Javier Guzman, Joseph Mundenar, Michael Conover
  • Distinguishing foreign surface features from native surface features
    Patent number: 9863892
    Abstract: Provided herein is an apparatus, including a photon emitter configured for sequentially emitting a first set of photons and a second set of photons onto a surface of an article. In addition, a photon detector array is configured to focus the first set of photons scattered from surface features of the article in a first focal plane. The photon detector array is further configured to focus the second set of photons scattered from surface features of the article in a second focal plane, wherein the first set of photons scattered is different from the second set of photons scattered. The photon detector array is further configured to provide information for distinguishing foreign surface features of the article from native surface features of the article.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: January 9, 2018
    Assignee: Seagate Technology LLC
    Inventors: Joachim Walter Ahner, David M. Tung, Samuel Kah Hean Wong, Henry Luis Lott, Stephen Keith McLaurin, Maissarath Nassirou, Florin Zavaliche
  • Object-based commands with data integrity identifiers
    Patent number: 9864773
    Abstract: Systems and methods are disclosed for object-based commands with data integrity identifiers. In an embodiment, an apparatus may comprise a data storage device configured to store data as objects, each object including a data field with a variable size to store user data, and to receive a command including an operation directed to an object and a data integrity identifier to perform the operation based on a hash value of the user data. Commands may be directed towards put, get, or delete operations, among others.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: January 9, 2018
    Assignee: Seagate Technology LLC
    Inventors: Timothy R Feldman, James Prescott Hughes, Martin R Furuhjelm
  • Sputtering shield
    Patent number: 9865440
    Abstract: A sputtering apparatus includes a sputtering cathode and a target overlying the sputtering cathode. A shield overlies the target and forms an aperture configured to direct sputtering particles onto a substrate. The shield includes a lower shield portion overlying the target, a channel outlet overlying the lower shield portion, and an upper shield portion overlying the channel. In some embodiments the shield includes a first shield and a second shield. The first shield includes a front gas injection outlet. The second shield overlies the first shield and forms the aperture. In various embodiments, the second shield is operable to adjust plasma confinement between the first shield and the second shield.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: January 9, 2018
    Assignee: Seagate Technology LLC
    Inventors: Stan Kassela, Wei Xu, Lim Boon Leong, Liu Hao Jun, Chun Wai Tong, Weilu H. Xu, Thomas Larson Greenberg, Antonio Javier Zambano, Robin Andrew Davies
  • Conical pumping seal
    Patent number: 9865298
    Abstract: Provided herein is an apparatus, including a stationary component, a rotatable component configured to rotate relative to the stationary component, and a conical pumping seal formed between the stationary component and the rotatable component.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: January 9, 2018
    Assignee: Seagate Technology LLC
    Inventors: Hans Leuthold, Lynn Bich-Quy Le, Chris M. Woldemar
  • Uniform laser direct writing for waveguides
    Patent number: 9864139
    Abstract: A waveguide includes a segment with a substantially uniform cure profile and related methods and systems for making and using the same. The waveguide is formed by modifying a laser beam used to write the waveguide to provide a substantially uniform cure profile in the waveguide. A marker characteristic of laser writing may be present in the waveguide. A method or system modifies an intensity profile or a shape profile of a laser beam to proactively compensate for exposure convolution based on the characteristics of the laser beam spot profile. A convolution compensator is positioned in the path of the laser beam to modify the beam spot profile during writing to form the one or more segments of the waveguide in a photo-curable layer.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: January 9, 2018
    Assignee: Seagate Technology LLC
    Inventor: Richard C. A. Pitwon
  • Method of removing head contamination during contact detection
    Patent number: 9858953
    Abstract: A method of removing contamination from a magnetic recording head during contact detection, including the steps of setting a heat actuator at a first power level, dwelling at the first power level for a specified length of time, removing contamination from the head during the specified dwell time, oscillating the heat actuator from the first power level to a second level that is lower than the first level while detecting periodic contact between the head and an adjacent disk, calculating the amplitude of the detected periodic contact, and correlating the calculated amplitude to a clearance distance between the head and the disk.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: January 2, 2018
    Assignee: Seagate Technology LLC
    Inventor: Michael Thomas Johnson
  • Fabrication of a multi-layered magnetic element
    Patent number: 9856557
    Abstract: A fabrication method that includes cryogenically cooling a multi-layered structure, which includes a barrier layer, in a multi-purpose chamber having a single enclosure around at least one sputtering target and a substrate support. The method also includes depositing a ferromagnetic layer over the barrier layer of the cryogenically cooled multi-layered structure in the single enclosure when the multi-layered structure is supported on the substrate support.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: January 2, 2018
    Assignee: Seagate Technology LLC
    Inventors: Jae-Young Yi, Eric W. Singleton
  • Open block stability scanning
    Patent number: 9858002
    Abstract: Systems and methods are disclosed for open block stability scanning. When a solid state memory block remains in an open state, where the block is only partially filled with written data, for a prolonged period of time, a circuit may perform a scan on the block to determine the stability of the stored data. When the scan indicates that the data is below a stability threshold, the data may be refreshed by reading the data and writing it to a new location. When the scan indicates that the data is above a stability threshold, the circuit may extend the time period in which the block may remain in the open state.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: January 2, 2018
    Assignee: Seagate Technology LLC
    Inventors: Ryan James Goss, Antoine Khoueir, Ara Patapoutian