Patents Assigned to Seagate Technologies
  • Reduced spacing recording apparatus
    Patent number: 9299379
    Abstract: Aspects include recording media with enhanced areal density through reduction of head media spacing, head keeper spacing, or head to soft underlayer spacing. Such aspects comprise replacing currently non-magnetic components of devices, such as interlayers and overcoats with components and compositions comprising magnetic materials. Other aspects relate to magnetic seed layers deposited within a recording medium. Preferably, these aspects, embodied as methods, systems and/or components thereof reduce effective magnetic spacing without sacrificing physical spacing.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: March 29, 2016
    Assignee: Seagate Technology LLC
    Inventors: Kaizhong Gao, Bin Lu, Bogdan Florin Valcu, Xiaoding Ma
  • Detection/erasure of random write errors using converged hard decisions
    Patent number: 9298547
    Abstract: A low-density parity-check decoder in a system with multi-level cells identifies zones of reliability where write errors or stuck cells are identifiable. The system uses assumedly successfully decoded pages associated with bits in a cell to identify candidate write errors or stuck cells and erases a corresponding log-likelihood ratio even where such log-likelihood ratio is saturated, thereby breaking a potential trapping set without post-processing.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: March 29, 2016
    Assignee: Seagate Technology LLC
    Inventors: Abdel-Hakim S. Alhussien, Erich F. Haratsch, Yunxiang Wu
  • Optical articles and methods of making same
    Patent number: 9297959
    Abstract: Disclosed herein is a method for fabricating an optical device that includes depositing an etch stop material to form an etch stop layer, wherein the etch stop material has a refractive index in the infrared wavelength range, n1; depositing a core material to form a core layer, wherein the core material has a refractive index in the infrared wavelength range, n2; and etching the core layer using a halide based etch process, wherein the etch stop material has an etch rate in the halide based etch process and the core material has an etch rate in the halide based etch process, wherein the etch rate of the core material is at least about five times higher than the etch rate of the etch stop material, and wherein n1 is not greater than n2.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: March 29, 2016
    Assignee: Seagate Technology LLC
    Inventors: Xiaoyue Huang, Lijuan Zou, Yongjun Zhao, Michael Kautzky
  • Command sets and functions
    Patent number: 9298521
    Abstract: Systems and methods are disclosed for command sets and functions for communication between and operation of devices, especially data storage devices. In an embodiment, an apparatus may comprise a data storage device configured to store data as objects, each object including a tracking indicator to identify the object, and a data field with a variable size to store user data. The data storage device may further be configured to receive a command including an operation directed to an object and an indicator that specifies a variation of the operation to be performed. In another embodiment, a memory device may store instructions that cause a processor to perform a method comprising storing data as objects to a nonvolatile media, and receiving a command including an operation directed to an object and an indicator that specifies a variation of the operation to be performed.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: March 29, 2016
    Assignee: Seagate Technology LLC
    Inventors: Timothy R Feldman, James Prescott Hughes, Martin R Furuhjelm
  • Classification of surface features using fluorescence
    Patent number: 9297759
    Abstract: Provided herein is an apparatus, including a photon emitter configured to emit photons onto a surface of an article, a photon detector array configured to receive photons from surface features of the article; and a processing means configured for processing photon-detector-array signals corresponding to photons scattered from the surface features and photons fluoresced from the surface features, wherein the processing means is further configured for classifying the surface features of the article.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: March 29, 2016
    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
  • Mobile personalized boot data
    Patent number: 9299402
    Abstract: A system and associated method of using may generally have at least a mobile data storage device with a controller directing data to first and second tiers of memory. The first tier of memory can have at least boot data pre-fetched from the second tier of memory with the boot data including at least metadata and personalized user data.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: March 29, 2016
    Assignee: Seagate Technology LLC
    Inventors: David Scott Ebsen, Ara Patapoutian, Michael Joseph Steiner, Kevin Arthur Gomez
  • Seal-type label to contain pressurized gas environment
    Patent number: 9293169
    Abstract: In some embodiments, a data storage device has a housing with a cover and a base to define an interior environment. Fasteners extend through the housing to secure respective shafts that support a rotatable data recording medium and an actuator assembly, respectively. Spaced apart first and second seals contactingly engage and surround the housing to sealingly cover the fasteners. Third and fourth seals contactingly engage the first and second seals and the housing to seal the first and second seals.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: March 22, 2016
    Assignee: Seagate Technology LLC
    Inventors: Thomas G. Andrikowich, Michael C. Strzepa
  • Detection and decoding in flash memories using correlation of neighboring bits and probability based reliability values
    Patent number: 9292377
    Abstract: Methods and apparatus are provided for detection and decoding in flash memories using a correlation of neighboring bits or errors in neighboring bits. Data from a flash memory device is processed by obtaining one or more read values for a plurality of bits in one or more pages of the flash memory device; converting the one or more read values for the plurality of bits to a reliability value, such as a log likelihood ratio (LLR), for a given bit among said plurality of bits based on a probability that a data pattern was written to the plurality of bits given that a particular pattern was read from the plurality of bits; and decoding the given bit in a given page of the one or more pages using the reliability value. The probability may be obtained from one or more transition probability tables, or may be based on one or more reference cells, prior decoded decisions or performance factors.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: March 22, 2016
    Assignee: Seagate Technology LLC
    Inventors: Abdel Hakim S. Alhussien, Erich F. Haratsch
  • Positive and negative magnetostriction ultrahigh linear density sensor
    Patent number: 9293159
    Abstract: A data sensor may be configured with a magnetic stack disposed between first and second magnetic shields. The magnetic stack can have a non-magnetic spacer layer disposed between first and second magnetically free laminations respectively coupled to the first and second magnetic shields via first and second electrode laminations. The first magnetically free lamination may have a first sub-layer constructed of a transition metal material and disposed between a second sub-layer constructed of a negative magnetostriction material and a third sub-layer constructed of a positive magnetostriction material.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: March 22, 2016
    Assignee: Seagate Technology LLC
    Inventors: Wonjoon Jung, Dimitar V. Dimitrov, Mark T. Kief
  • Method and system for preserving data of a storage device
    Patent number: 9293153
    Abstract: A method and system for preserving data of a storage device are disclosed. In one embodiment, the method includes determining a number of times data is written to a first track in a first region of a storage medium, and rewriting data from a second track that is adjacent to the first track in the first region if the number of times data is written to the first track in the first region exceeds a first predetermined threshold. The method further includes determining a number of times data is rewritten to the second track in the first region, and relocating data from the second track in the first region to a second region of the storage medium if the number of times data is rewritten to the second track in the first region exceeds a second predetermined threshold.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: March 22, 2016
    Assignee: Seagate Technology LLC
    Inventors: Sokhyun Kong, Hoosan Lee, Mai Ghaly
  • Method of patterning a stack
    Patent number: 9284649
    Abstract: The embodiments disclose a method of fabricating a stack, including replacing a metal layer of a stack imprint structure with an oxide layer, patterning the oxide layer stack using chemical etch processes to transfer the pattern image and cleaning etch residue from the stack imprint structure to substantially prevent contamination of the metal layers.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: March 15, 2016
    Assignee: Seagate Technology LLC
    Inventors: Michael R. Feldbaum, Justin Jia-Jen Hwu, David S. Kuo, Gennady Gauzner, Kim Yang Lee, Li-Ping Wang
  • High frequency data writer field generator device
    Patent number: 9286916
    Abstract: A data writing device may be constructed and operated with at least a data writer that has at least a write pole and a magnetic feature. A controller may selectively activate the magnetic feature to magnetically oscillate and produce a radio frequency signal proximal the write pole on an air bearing surface (ABS).
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: March 15, 2016
    Assignee: Seagate Technology LLC
    Inventors: Kirill Rivkin, Mourad Benakli, Huaqing Yin
  • Dynamic band boundaries
    Patent number: 9286150
    Abstract: Systems and methods are disclosed for dynamic band boundaries in data storage devices, particularly devices employing shingled magnetic recording. Band boundaries may be modified to include spare sectors from guard areas between bands to achieve field defect-slipping. Band boundaries can also be shifted to migrate spare sectors from one guard area to another in order to dynamically distribute spare sectors. In one embodiment, an apparatus may comprise a data storage medium and a controller. The data storage medium may have a first and second sequence of circumferentially adjacent data sectors, and a first guard area disposed between the first and second sequence such that no sector of the first sequence is directly adjacent to a sector of the second sequence. The controller may be configured to restructure the first sequence to include a sector from the first guard area to produce a shifted first sequence.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: March 15, 2016
    Assignee: Seagate Technology LLC
    Inventor: Timothy R Feldman
  • Write pole formed with evaporation deposition
    Patent number: 9286917
    Abstract: A write pole may be formed by first depositing a dielectric layer onto a substrate and then patterning the dielectric layer to form a trench with a write pole shape. The trench is subsequently filled with the evaporation deposition of a magnetic material to form a write pole. The trench may have a greater depth dimension than width dimension.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: March 15, 2016
    Assignee: Seagate Technology LLC
    Inventors: Venkateswara R. Inturi, Aly A. Bazama, Yong Luo, Joseph M. Mundenar
  • In-situ lapping plate mapping device
    Patent number: 9286930
    Abstract: A device and associated method of use can have at least an object with a work surface that contacts a lapping surface of a tool. Topography of the lapping surface can be mapped in-situ by an adjacent sensor array and the topography stored in a memory. The sensor array may be configured with a plurality of sensors positioned on opposite sides of the object.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: March 15, 2016
    Assignee: Seagate Technology LLC
    Inventors: Raymond Leroy Moudry, Pramit Parikh, Mark Allen Herendeen, Joel W. Hoehn
  • Materials for near field transducers and near field transducers containing same
    Patent number: 9286931
    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: June 24, 2014
    Date of Patent: March 15, 2016
    Assignee: Seagate Technology LLC
    Inventors: Sethuraman Jayashankar, Michael C. Kautzky
  • Method and system for preserving data of a storage device
    Patent number: 9286947
    Abstract: Various embodiments of a method and system for preserving data of a data storage device are disclosed. The method can include determining a number of times data is written to a target track of a storage medium; rewriting data from a track adjacent the target track if the number of times data is written to the target track exceeds a first predetermined threshold; determining a number of times data is rewritten to the adjacent track; copying data from the target track to a first storage location of a media cache if the number of times data is rewritten to the adjacent track exceeds a second predetermined threshold; writing subsequent data designated for the target track to the first storage location of the media cache; and relocating data from the first storage location of the media cache to the target track.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: March 15, 2016
    Assignee: Seagate Technology LLC
    Inventor: Mai Ghaly
  • Shaped internal leads for a printed circuit substrate
    Patent number: 9288905
    Abstract: A printed circuit substrate may be configured with at least one internal lead designed and shaped to reduce solder bridging. The printed circuit substrate can have a plurality of internal leads that each has a continuously curvilinear boundary that defines an isolation channel. The isolation channel may be configured with a uniform distance that separates a first internal lead from an adjacent second internal lead.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: March 15, 2016
    Assignee: Seagate Technology LLC
    Inventors: Prapan Aparimarn, Chaovalit Chiyatan, Piriyakorn Jirawattanakasem, Joompondej Bamrungwongtaree
  • Devices including near field transducer and adhesion layers
    Patent number: 9281003
    Abstract: A device including a near field transducer (NFT); a write pole; at least one dielectric material positioned between the NFT and the write pole; and an adhesion layer positioned between the NFT and the at least one dielectric material.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: March 8, 2016
    Assignee: Seagate Technology LLC
    Inventors: Tong Zhao, Meng Zhu, Xiaoyue Huang, Michael C. Kautzky
  • Dissipating heat during device operation
    Patent number: 9282681
    Abstract: Apparatus for dissipating heat during the operation of a device. In accordance with some embodiments, the apparatus compares spaced-apart first and second heat sources. A thermally conductive plate is disposed between the first and second heat sources. A thermal interface layer is contactingly disposed between the plate and the first heat source, and has a relatively higher thermal conductivity so that heat generated by the first heat source passes through the thermal interface layer and to the plate. A thermal barrier layer is contactingly disposed between the plate and the second heat source to mechanically support the plate relative to the second heat source. The thermal barrier layer has a relatively lower thermal conductivity to thermally isolate the conductive plate from the second heat source.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: March 8, 2016
    Assignee: Seagate Technology LLC
    Inventor: William L. Rugg