Patents Assigned to Seagate Technology LLC
  • Concurrent actions for data storage
    Patent number: 8417839
    Abstract: The disclosure is related to systems and methods of concurrent actions for data storage. A controller may be configured to initialize a first data storage medium and a second data storage medium. The controller may receive a command when the first data storage medium is initialized but before the second data storage medium is initialized. The controller may service the command when the command utilizes the first data storage medium and the initialization for the second data storage medium is not complete. A controller may also be configured to send an indicator to a host that the system is ready to receive commands when a first data storage device is initialized, but a second data storage device is still in an initialization process.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Keow Seng Ng, Vincent Michael McGarry, Abhay Tejmal Kataria, Lace J. Herman, Dennis A. Rubsam, Steven Scott Williams
  • Endcap for reducing airflow excitation of head gimbal assembly
    Patent number: 8416535
    Abstract: An endcap for use on an actuator arm carrying a single head gimbal assembly, the endcap comprising a body, and a shielding feature extending from the body for reducing windage excitation of the head gimbal assembly.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Kurt J. Korkowski, Lance L. Thoresen, Xiaohong Sun
  • Optical transducers and methods of making the same
    Patent number: 8416647
    Abstract: A near field transducer (NFT) that includes a disk, the disk having a top surface, a side surface, and a center; a peg, the peg positioned adjacent the side surface of the disk; and a heat sink, the heat sink positioned on the top surface of the disk, and the heat sink having an effective center, wherein the NFT has a peg axis, which is defined by the location of the peg adjacent the side surface of the disk, and a non-peg axis, which is perpendicular to the peg axis, and wherein the effective center of the heat sink is positioned at about the center of the disk.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Yongjun Zhao, Shuaigang Xiao
  • System and method for forming a servo pattern on a media master
    Patent number: 8416648
    Abstract: Producing a servo pattern on a media involves rotating a master, and during a first revolution of the master, forming a first transition at a first radial position on the master, and forming a first transition at a second radial position. During a second revolution of the master, a second transition at the first radial position is formed, and a second transition at the second radial position is formed. By exposing individual servo burst transitions located at the first and second radial positions, in separate disk revolutions, only one of the magnetic transitions will inherit a particular deflection from a nominal radial position. If there are any mechanical disturbances, each magnetic transition will be randomly displaced from its nominal position, reducing the written-in run-out by ?n, where n is the number of magnetic transitions in a particular servo burst.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Gabor Szita, Koichi Wago, Neil Deeman
  • Shaped shield for a magnetoresistive head
    Patent number: 8416538
    Abstract: A magnetic shield that is capable of enhancing magnetic reading, such as in use as a data transducing head. A magnetic stack can have a read element with an air bearing surface (ABS). The read element may be positioned adjacent a shield layer with a continuously curvilinear sidewall and a shield feature may be positioned within the areal extent of the continuously curvilinear sidewall.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Werner Scholz, Michael C. Kautzky, Meng Zhu, Venkateswara R. Inturi
  • Selection of units for garbage collection in flash memory
    Patent number: 8417878
    Abstract: A data structure is formed that references a garbage collection metric for each of a plurality of associated garbage collection units of a flash memory device. Each garbage collection metric is based on one or more device state characteristics of the associated garbage collection unit. In response to a threshold change in the one or more device state variables, a region of interest within the data structure is sorted based on the garbage collection metrics. One or more garbage collection units are selected for garbage collection operations from the sorted region of interest.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Ryan James Goss, Mark Allen Gaertner
  • Write head with bevel structure and reverse NFT for HAMR
    Patent number: 8416530
    Abstract: A magnetic recording head comprises a write pole tip adjacent to an air bearing surface and a return pole. In addition, a near field transducer is positioned adjacent the write pole in order to produce near field radiation to heat a portion of a recording medium to facilitate switching by the magnetic write pole. The near field transducer is a reverse optical near field transducer with internal bevel structures that enhance the magnetic write field intensity.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Kaizhong Gao, Xuhui Jin, Arkadi Goulakov
  • Perpendicular magnetic recording medium
    Patent number: 8415035
    Abstract: A perpendicular magnetic recording medium is provided. The perpendicular magnetic recording medium includes: a perpendicular magnetic recording layer formed on a substrate; and at least one soft magnetic under-layer formed between the substrate and the perpendicular magnetic recording layer, wherein the soft magnetic under-layer is made from an alloy of a non-magnetic material and a magnetic material which exists in the form of granular nanoparticles in matrix of the non-magnetic material, and at least two of the magnetic nanoparticles are spaced apart from one another by a predetermined distance so as to mutually make an anti-ferromagnetic coupling.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Hoo San Lee, Hoon Sang Oh, Sok Hyun Kong, Seong Yong Yoon
  • Magnetic memory with phonon glass electron crystal material
    Patent number: 8416619
    Abstract: A magnetic memory unit includes a tunneling barrier separating a free magnetic element and a reference magnetic element. A first phonon glass electron crystal layer is disposed on a side opposing the tunneling barrier of either the free magnetic element or the reference magnetic element. A second phonon glass electron crystal layer also be disposed on a side opposing the tunneling barrier of either the free magnetic element or the reference magnetic element to provide a Peltier effect on the free magnetic element and the reference magnetic element.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Yuankai Zheng, Haiwen Xi, Dimitar V. Dimitrov, Dexin Wang
  • ADJUSTABLE MEMORY ALLOCATION BASED ON ERROR CORRECTION
    Publication number: 20130086454
    Abstract: An apparatus may comprise a memory including a first area of total usable storage capacity of the memory reported to a host device, a second area occupied by error correction code (ECC) appended to data stored in the first area, and a third area of usable data storage capacity not reported to the host device. The apparatus may further comprise a controller configured to balance sizes of the second area and third area to maintain a size of the first area as the length of ECC of data stored in the first area increases. The controller may be further configured to exchange data having an ECC of a controllable length with the memory based on a data storage location, and adjust the controllable length of the ECC based on an error history of the data storage location.
    Type: Application
    Filed: November 27, 2012
    Publication date: April 4, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Bernardo Rub
  • HYDRODYNAMIC DISC DRIVE SPINDLE MOTOR HAVING HYDRO BEARING WITH LUBRICANT
    Publication number: 20130082556
    Abstract: A lubricating fluid contains a synthetic ester base fluid having a viscosity index of at least 110, from 0.01% to 5% by weight, based on the total weight of the lubricating fluid, of at least one tri-C6-C14-aryl phosphate, and from 0.01% by weight to 5% by weight, based on the total weight of the synthetic ester base fluid, of at least one carbodiimide.
    Type: Application
    Filed: September 6, 2012
    Publication date: April 4, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Raquib Uddin Khan
  • OPTICAL ARTICLES AND METHODS OF MAKING SAME
    Publication number: 20130084441
    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: Application
    Filed: September 29, 2011
    Publication date: April 4, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Xiaoyue Huang, Lijuan Zou, Yongjun Zhao, Michael Kautzky
  • BIASING STRUCTURE FOR WRITE ELEMENT DOMAIN CONTROL IN A MAGNETIC WRITER
    Publication number: 20130083429
    Abstract: A magnetic writer includes a write element having a first domain pattern when in a quiescent state and a second domain pattern when in an active state. A biasing structure is configured to induce the write element into the first domain pattern when the magnetic writer is in the quiescent state.
    Type: Application
    Filed: November 27, 2012
    Publication date: April 4, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: SEAGATE TECHNOLOGY LLC
  • MAGNETIC TRANSDUCER
    Publication number: 20130083433
    Abstract: A magnetic head that includes: a slider having a leading edge and a trailing edge; and a transducer, the transducer formed on the trailing edge of the slider and the transducer including: a substrate; a basecoat positioned adjacent the substrate, wherein the basecoat includes a material having a Young's modulus that is less than that of alumina and a coefficient of thermal expansion that is less than that of alumina; a reader; a writer; a heater; and an overcoat encasing at least a portion of the transducer, wherein the overcoat includes a material having a Young's modulus that is less than that of alumina and a coefficient of thermal expansion that is less than that of alumina.
    Type: Application
    Filed: September 29, 2011
    Publication date: April 4, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Paul Julio Sonda, Edwin Frank Rejda, Declan Macken
  • LIGHT DELIVERY GUIDE
    Publication number: 20130083637
    Abstract: A waveguide that includes a first cladding layer, the first cladding layer having an index of refraction, n3; a gradient index layer positioned adjacent the first cladding layer; an assist layer positioned adjacent the gradient index layer, the assist layer having an index of refraction, n2; a core layer positioned adjacent the assist layer, the core layer having an index of refraction, n1; and a second cladding layer, the second cladding layer having an index of refraction, n4, wherein n1 is greater than n2, n3, and n4; and n2 is greater than n3 and n4.
    Type: Application
    Filed: September 29, 2011
    Publication date: April 4, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Chubing Peng
  • Partial rib extending from a hub
    Patent number: 8411388
    Abstract: A hard disk drive and a disk base are disclosed with the disk base including a first face configured to form a disk cavity for the spindle motor, disk(s) and a voice coil motor and a second face configured to couple with a controller Printed Circuit Board (PCB) including at least one integrated circuit. Both faces are include a hub for mounting the spindle motor and surrounded by an outer wall. The first face and/or the second face include at least one partial rib extending from the hub or the outer wall partway to the other. The partial ribs are configured to position the integrated circuit and stiffen the disk base and hard disk drive from mechanical shocks, such as dropping the unit including the hard disk drive. A handheld device is disclosed including at least one of the disclosed hard disk drives with improved reliability to mechanical shocks.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: April 2, 2013
    Assignee: Seagate Technology LLC
    Inventor: Haesung Kwon
  • Magnetic field sensor including multiple magnetoresistive sensing elements for patterned media
    Patent number: 8411392
    Abstract: An apparatus for sensing magnetic domains in a patterned media that includes a first sensing element and a second sensing element in electrical communication with the first sensing element. The first sensing element has an output voltage lead and the second sensing element has an output voltage lead. The patterned media may be a bit patterned media or a track patterned media.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: April 2, 2013
    Assignee: Seagate Technology LLC
    Inventors: Rene J. M. van de Veerdonk, Thomas F. Ambrose
  • Storage device accessory
    Patent number: D679711
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Michael Perry, Ming-Hsueh Tsai, Ash Razdan
  • Cartridge interface
    Patent number: D679712
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Paul T. McParland, Mu-Jung Chen, Ming-Hsueh Tsai
  • Cartridge interface
    Patent number: D679713
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventors: Paul T. McParland, Mu-Jung Chen, Ming-Hsueh Tsai