Patents Assigned to Seagate Technologies
  • Self-writing of servo patterns
    Patent number: 8879187
    Abstract: Various embodiments of the present invention allow for the generation of at least one estimated value of a first parameter that is derived from a regularly measured value of a second parameter. In addition, a single control feedback signal can be adjusted via updating of the estimated and regularly measured values in a control feedback loop. At least one spiral track can be written to storage media based on the single control feedback signal, where the single control feedback signal can be received from an compensating circuit that receives the at least one estimated value of the first parameter, which can refer to position, and the at least one regularly measured value, which can refer to velocity.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: November 4, 2014
    Assignee: Seagate Technology LLC
    Inventors: Xin H. Yang, S. Craig Smith, Lin Guo
  • Segmenting of read-modify-write operations
    Patent number: 8879183
    Abstract: Systems, devices, apparatuses, and methods for segmented read-modify-write operations are disclosed. The examples provided can allow a system to perform a read-modify-write (RMW) operation for data stored in a main storage that has a larger data size than is capable of being stored in an available buffer. Examples of such a system include discs having bands of shingled tracks. In such example, each band can be split into segments containing one or more tracks and a read-modify-write-write (RMWW) operation can be performed for each segment. Further, a logical guard band can be implemented to protect the segments from overwriting a next track in a shingled band. Also, multiple scratchpads may be implemented.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 4, 2014
    Assignee: Seagate Technology LLC
    Inventor: Adam Weikal
  • Servo patterns including selectively magnetizable magnetic features
    Patent number: 8879184
    Abstract: Provided herein is an apparatus, including a servo pattern having magnetic features, wherein each magnetic feature of the magnetic features includes a single magnetic domain; a first population of the magnetic features; a second population of the magnetic features; and a selective magnetization means for selective magnetization of either one of the first population or the second population of magnetic features over the other.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: November 4, 2014
    Assignee: Seagate Technology LLC
    Inventor: Philip Steiner
  • Management of variable resistance data storage device
    Patent number: 8879302
    Abstract: Various embodiments may generally be directed to a variable resistance data storage device and a method of managing the device. A data storage device may have at least a controller configured to re-characterize at least one variable resistance memory cell in response to an identified variance from a predetermined resistance threshold.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: November 4, 2014
    Assignee: Seagate Technology LLC
    Inventors: Mark Allen Gaertner, Ryan James Goss, Jon D. Trantham
  • Conducting heat away from a printed circuit board assembly in an enclosure
    Patent number: 8879263
    Abstract: A printed circuit board assembly (PCBA) is connected to a frame within a passage. The PCBA includes a circuitry package attached to a printed circuit board. The circuitry package has a peripheral edge extending from the printed circuit board to a distal end joined to a cap. A cover is attached to the frame to enclose the PCBA. A thermal interface material (TIM) is disposed between the cover and the PCBA, the TIM defining an opening sized to receivingly engage the circuitry package in a close mating engagement contacting the TIM simultaneously against the cap and the peripheral edge to conduct heat away from the circuitry package. A heat conductor attached to the other side of the printed circuit board in an overlapping opposition to the circuitry package conducts heat away from the printed circuit board that is generated by the circuitry package.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: November 4, 2014
    Assignee: Seagate Technology LLC
    Inventor: Neal Frank Gunderson
  • Low-recess write pole coil near shield at media-facing surface
    Patent number: 8873201
    Abstract: An apparatus includes a write pole magnetically coupled to write coils that generate a first magnetic field during a switching event. The apparatus includes a shield at a media-facing surface and proximate the write pole. A conductive element is disposed proximate the shield and configured to generate a second magnetic field opposite to the first magnetic field during the switching event. A selected one of the write coils is located adjacent the shield separate from others of the write coils.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventors: Mourad Benakli, Kirill Aleksandrovich Rivkin, Zhe Shen, Jiaoming Qiu, Huaqing Yin
  • Recording head coil structure
    Patent number: 8873199
    Abstract: A recording head comprising a write pole and a coil structure asymmetric with respect to the write pole and configured to generate more magnetic flux on a trailing side of the main pole than the magnetic flux on a front side of the main pole.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventors: Eric Roger Meolche, Chris Rea, Jianhua Xue, Eric Linville, John M. Wolf
  • Method and apparatus for aligning a laser to a waveguide
    Patent number: 8873903
    Abstract: An apparatus includes a slider structure having a waveguide and a cavity configured to align a laser to the waveguide. The cavity includes a plurality of solder bumps on a bottom of the cavity configured to electrically and thermally couple the laser to the slider. At least one mechanical stopper is disposed in the cavity to facilitate vertical alignment between an output of the laser and an input of the waveguide. At least one solder bump is disposed on the mechanical stopper to facilitate lateral alignment between the output of the laser and the input of the waveguide in response to a reflow of the solder bumps.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventor: James Gary Wessel
  • Storing random and sequential data on different track widths of a recording medium
    Patent number: 8873178
    Abstract: Host data to be written to a recording medium is categorized as one of sequential data or random data. The sequential data is written to a first track width on the recording medium. The random data is written to a second track width on the recording medium, the second track width being larger than the first track width.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventors: Mehmet Fatih Erden, Mourad Benakli
  • Method and apparatus for coupling a laser diode to a magnetic writer
    Patent number: 8873348
    Abstract: A write head includes a cavity configured to couple a laser diode to the write head. A bottom of the cavity includes a heat conductive element configured to contact the laser diode, a plurality of thermal studs disposed below the heat conductive element, and a substrate disposed below the thermal studs. The heat conductive element, thermal studs, and substrate are thermally coupled to draw heat from the laser diode.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventors: Roger L. Hipwell, Yongjun Zhao, Mark Ostrowski, Andrew D. Habermas
  • Estimating narrow, laser-induced protrusion at a near-field transducer
    Patent number: 8873353
    Abstract: Fixed patterns are written on a track of a heat-assisted, recording medium at multiple, heater-induced write clearances via a recording head. The writing involves heating the recording medium via a near-field transducer of the recording head. Amplitudes of the fixed patterns are read back at a predetermined read clearance. A clearance difference between a start and an end of a first data sector of the track is determined based on the amplitudes. A narrow, laser-induced protrusion is estimated at the near-field transducer based on the clearance difference.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventor: Jason Riddering
  • Method and apparatus used for determining friction between slider and rotating data storage medium
    Patent number: 8869590
    Abstract: A flexible member is coupled between an actuator arm and a slider. The flexible member facilitates relative motion in a tangential direction of a rotating medium. The relative motion is detected via a displacement sensor, and a friction between the slider and the rotating medium is determined based on the sensed relative motion.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventors: Huiwen Liu, David Wobbe, Xuan Zheng, Timothy William Stoebe
  • Corrosion resistant coating for copper substrate
    Patent number: 8871366
    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: Grant
    Filed: May 28, 2013
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventors: Yongping Gong, Kristoffer Steven Scheponik
  • Light mitigation layer between write pole and waveguide
    Patent number: 8873352
    Abstract: An apparatus has a near-field transducer located proximate a media-facing surface of a slider magnetic recording heat. A waveguide is configured to couple light to the near-field transducer and includes a top cladding layer facing the near-field transducer, a bottom cladding layer, and a core layer between the top and bottom cladding layers. The apparatus includes a write pole with a flat portion substantially parallel to the core layer and a sloped portion extending from the flat portion of the write pole towards the media-facing surface at an angle to the core layer and to the media-facing surface. A light mitigation layer is located between the top cladding layer and the write pole.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventors: Zoran Jandric, Chris Rea, Pierre Asselin, Michael Thomas Johnson, Manuel Charles Anaya-Dufresne, John C. Duda
  • Garbage collection management in memories
    Patent number: 8874872
    Abstract: The disclosure is related to systems and methods of managing a memory. In a particular embodiment, a memory channel is disclosed that includes multiple memory units, with each memory unit comprising multiple garbage collection units. The memory channel also includes a controller that is communicatively coupled to the multiple memory units. The controller selects a memory unit of the multiple memory units for garbage collection based on a calculated number of memory units, of the multiple memory units, to garbage collect.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventors: Timothy R. Feldman, Jonathan W. Haines, Wayne H. Vinson
  • Optical devices including assistant layers
    Patent number: 8873349
    Abstract: A waveguide including a top cladding layer, the top cladding layer including a material having an index of refraction, n1; an assistant layer, the assistant layer positioned adjacent the top cladding layer, the assistant layer including a material having an index of refraction, n2; a core layer, the core layer positioned adjacent the assistant layer, the core layer including a material having an index of refraction, n3; and a bottom cladding layer, the bottom cladding layer positioned adjacent the core layer, the bottom cladding layer including a material having an index of refraction, n4, wherein n1 is less than both n2 and n3, n3 is greater than n1 and n4, and n4 is less than n3 and n2.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventor: Chubing Peng
  • Heat assisted media recording apparatus with compensating heater
    Patent number: 8873350
    Abstract: An apparatus includes an optical pathway configured to deliver energy to heat a magnetic recording medium via a slider body. The optical pathway generates heat in the slider body when delivering energy to the magnetic recording medium. The apparatus includes a compensating heater with a thermal characteristic that matches a thermal characteristic of the optical pathway. The compensating heater is activated at least part of the time when the optical pathway is not delivering the energy to the magnetic recording medium.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventors: Tim Rausch, Kenneth Ray Burns
  • Controlling head-media spacing using a write coil
    Patent number: 8867323
    Abstract: While a heat-assisted, magnetic recording media is not being written to, heat applied from a write head to the recording media to facilitate writing to the recording media is removed. Power is applied to a write coil of the write head to control spacing between the write head and the recording media when the recording media is not being written to.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: October 21, 2014
    Assignee: Seagate Technology LLC
    Inventors: Raul Horacio Andruet, James Gary Wessel
  • Shingled magnetic recording with variable track spacing
    Patent number: 8867161
    Abstract: Apparatus and method for writing data to a data storage medium using shingled magnetic recording (SMR). In accordance with some embodiments, a transducer is positioned adjacent a recording medium. The transducer is used to write data to the medium in the form of partially overlapping tracks grouped together into bands so that a first track and a last track in a selected band are wider than remaining tracks in the selected band.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: October 21, 2014
    Assignee: Seagate Technology LLC
    Inventors: Bruce Emo, Ken R. Burns
  • Magnetic shield base lamination
    Patent number: 8867175
    Abstract: A magnetic element may generally be configured as a read head with at least a magnetic stack that contacts at least one magnetic shield. The magnetic shield can be positioned on top of a base lamination and have at least a predetermined anisotropy and magnetic coercivity corresponding to the base lamination.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: October 21, 2014
    Assignee: Seagate Technology LLC
    Inventors: Zhengqi Lu, Daniel Hassett, Jiansheng Xu