Patents by Inventor Barry Cushing Stipe

Barry Cushing Stipe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9053731
    Abstract: A system according to one embodiment includes a slider adapted for use in a hard disk drive; and a laser coupled to a slider, wherein electrical contacts of the laser are positioned towards or face the slider, wherein light from the laser is emitted towards the slider, wherein the slider acts as a heat sink for the laser.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: June 9, 2015
    Assignee: HGST Netherlands B.V.
    Inventors: Toshiki Hirano, Fu-Ying Huang, Jia-Yang Juang, Barry Cushing Stipe
  • Patent number: 9042209
    Abstract: In a heat-assisted magnetic recording head for use in a hard disk drive, a thermal shunt is positioned between an E-antenna near field transducer (NFT) and a return pole, to draw excess heat away from the NFT region. The thermal shunt comprises two portions separated by a gap that has a trapezoidal cross-section, where the NFT-side of the gap is wider than the return pole-side of the gap.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: May 26, 2015
    Assignee: HGST Netherlands B.V.
    Inventors: Hamid Balamane, Erhard Schreck, Matteo Staffaroni, Barry Cushing Stipe
  • Publication number: 20150036470
    Abstract: In a heat-assisted magnetic recording head for use in a hard disk drive, a thermal shunt is positioned between an E-antenna near field transducer (NFT) and a return pole, to draw excess heat away from the NFT region. The thermal shunt comprises two portions separated by a gap that has a trapezoidal cross-section, where the NFT-side of the gap is wider than the return pole-side of the gap.
    Type: Application
    Filed: July 30, 2013
    Publication date: February 5, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Hamid Balamane, Erhard Schreck, Matteo Staffaroni, Barry Cushing Stipe
  • Patent number: 8902720
    Abstract: A heat-assisted magnetic recording (HAMR) head has a protective film confined to a window of the disk-facing surface of the slider than surrounds the near-field transducer (NFT) and write pole end. Materials for the protective film include TiO2, ZrO2, HfO2, Nb2O5, Ta2O5, Sc2O3, Y2O3, MgO SiN, BN, SiBN and SiBNC. The slider overcoat is located in the non-window region on the slider's disk-facing surface and optionally also on the window region, with the outer surface of the overcoat forming the slider's ABS. An optional recess may be formed on the disk-facing surface of the slider in the window region, with the protective film located in the recess.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: December 2, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Erhard Schreck, Matteo Staffaroni, Barry Cushing Stipe
  • Patent number: 8854930
    Abstract: Techniques for improving the recording quality during heat assisted magnetic recording (HAMR) by monitoring the power of a source used to heat a storage medium are described. In one example, a source emits electromagnetic radiation. A waveguide transmits the electromagnetic radiation onto a surface of a magnetic media. A photoresistive material is proximately located to the waveguide. The resistance of the photoresistive material varies based on the intensity of electromagnetic radiation propagating through the waveguide. The power of the source is determined by measuring the resistance of the photoresitive material. The power of the source is adjusted based on the determined power.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: October 7, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Thomas William Clinton, Takuya Matsumoto, Shen Ren, Erhard Schreck, Barry Cushing Stipe
  • Patent number: 8842506
    Abstract: A heat-assisted magnetic recording (HAMR) disk drive with a primary waveguide that directs laser light from a laser diode to a near-field transducer includes a second waveguide for sensing the head-disk spacing or fly-height. The second waveguide has a sensor portion that senses the spacing and directs light representative of the spacing to the second waveguide's output end. The second waveguide may include a second or reference portion that is connected to the sensor portion and directs light representative of light input from the laser diode. The combined light from the two portions is directed to the second waveguide's output end. A detector, which may be a photo-diode, is located at the second waveguide's output end and provides a signal that may be coupled to a thermal fly-height controller to increase or decrease the fly-height.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: September 23, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Takuya Matsumoto, Shen Ren, Erhard Schreck, Matteo Staffaroni, Barry Cushing Stipe
  • Patent number: 8842507
    Abstract: A thermally-assisted magnetic recording (HAMR) disk drive uses a thermal sensor to accurately monitor laser power during writing. The disk drive controller, or a separate processor, computes a prediction of the laser power from a history of laser power settings. This predicted value is compared with the measured value from the thermal sensor. If the difference is too large or too small, indicating that the laser power is too high or too low, an error signal is sent to the disk drive controller. The disk drive controller may adjust the laser power setting and initiate a re-write of the data. The predicted laser power is calculated from a convolution of a sequence of current and prior laser power settings with a sequence of coefficients. A calibration process generates the sequence of coefficients when the disk drive is idle or just after it is powered on.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: September 23, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Toshiki Hirano, Lidu Huang, Tetsuo Semba, Barry Cushing Stipe
  • Patent number: 8743667
    Abstract: A thermally-assisted recording (TAR) disk drive operates by turning on write current prior to the application of heat to the recording layer by the near-field transducer (NFT). In a TAR disk drive that uses thermal fly-height control (TFC), TFC power is at a first power level that keeps the write pole at a predetermined fly-height. The write current is then turned on, either simultaneously with or after a reduction in TFC power. The write pole then reaches its optimal fly-height as a result of the combination of write pole protrusion caused by the write current and retraction of the write pole caused by the reduction in TFC power. After the write pole has reached its optimal fly-height, heat is applied to the recording layer by the NFT. The combination of write current and heat causes writing to occur at the optimal write pole fly-height.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: June 3, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Richard Michael Brockie, Gregory John Parker, Hans Juergen Richter, Erhard Schreck, Barry Cushing Stipe
  • Patent number: 8631561
    Abstract: The present invention generally relates to fabricating a bond pad for electrically connecting a laser diode to a slider and a TAR head in a HDD. The bond pad is deposited on a surface of the head that is perpendicular to the air bearing surface (ABS). The head is diced and lapped to expose the bond pad on a top surface of the head and mounted on a slider. The laser diode and a sub-mount may be coupled to the top surface of the slider—i.e., the surface opposite the ABS—by connecting to the bond pads. Specifically, both the laser diode and the sub-mount have electrodes thereon that are perpendicular to the bond pads. Conductive bonding material is used to bond the laser diode and the sub-mount to the bond pads.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: January 21, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Christian René Bonhôte, Linden James Crawforth, Toshiki Hirano, Fu-Ying Huang, Neil Leslie Robertson, Barry Cushing Stipe
  • Patent number: 8619535
    Abstract: An apparatus according to one embodiment includes a near field transducer comprising a conductive metal film; and an optical waveguide for illumination of the near field transducer, a light guiding core layer of the optical waveguide being spaced from the near field transducer by less than about 100 nanometers and greater than 0 nanometers, wherein a longitudinal axis of the optical waveguide is substantially perpendicular to an air bearing surface.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: December 31, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Hamid Balamane, Thomas Dudley Boone, Jr., Neil Leslie Robertson, Barry Cushing Stipe, Timothy Carl Strand
  • Patent number: 8619515
    Abstract: A thermally-assisted recording (TAR) head for recording data in data tracks of a TAR disk is supported on an air-bearing slider and includes a near-field transducer (NFT) and an optical waveguide that directs laser light to the NFT. The NFT has an output end at the slider's air-bearing surface (ABS) located between the write pole and the optical waveguide in the along-the-track direction. A reflection layer is located on the side of the waveguide opposite the NFT. The scattered light propagated by the waveguide is reflected back by the reflection layer to the NFT. When the distance between the reflection layer and the center of the NFT in the along-the-track direction is adjusted so the phase of the reflected light matches the phase of the plasma oscillation in the NFT, the intensity of the optical near-field is increased. This allows for a reduction in laser power.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: December 31, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Takuya Matsumoto, Barry Cushing Stipe
  • Patent number: 8514672
    Abstract: A near-field transducer (NFT) has a primary tip that concentrates the oscillating charge of the NFT onto a substrate, such as magnetic recording medium, to heat regions of the medium, and a secondary tip. The secondary tip is located close to a temperature sensor, such as an electrical conductor whose resistance varies with temperature. The temperature sensor senses heat from the secondary tip and thus properties of the substrate like surface topography and the presence or absence of metallic material. The NFT can be part of a bit-patterned media (BPM) thermally-assisted recording (TAR) disk drive. The temperature sensor output is used to control the write pulses from the disk drive's write head so the magnetic write field is synchronized with the location of the magnetic data islands.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: August 20, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Michael Konrad Grobis, Barry Cushing Stipe
  • Patent number: 8486289
    Abstract: A method of fabricating a c-aperture or E-antenna plasmonic near field source for thermal assisted recording applications in hard disk drives is disclosed. A c-aperture or E-antenna is built for recording head applications. The technique employs e-beam lithography, partial reactive ion etching and metal refill to build the c-apertures. This process strategy has the advantage over other techniques in the self-alignment of the c-aperture notch to the c-aperture internal diameter, the small number of process steps required, and the precise and consistent shape of the c-aperture notch itself.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: July 16, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Hamid Balamane, Thomas Dudley Boone, Jordan Asher Katine, Barry Cushing Stipe
  • Patent number: 8472286
    Abstract: According to one embodiment, an apparatus includes a near field transducer comprising a conductive metal film having a main body, a ridge extending from the main body, and wings extending from the main body in a same direction as the ridge, wherein the wings are only electrically coupled by the main body. In another embodiment, an apparatus includes a near field transducer comprising a conductive metal film having a main body, a ridge extending from the main body, and wings extending from the main body in a same direction as the ridge. Also the apparatus includes a layer of magnetic material positioned beyond the wings relative to the main body, wherein a length of the layer of magnetic material adjacent the near field transducer is at least about coextensive with a length of the main body in a same direction.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: June 25, 2013
    Assignee: HGST Netherlands B.V.
    Inventor: Barry Cushing Stipe
  • Publication number: 20130133182
    Abstract: The present invention generally relates to fabricating a bond pad for electrically connecting a laser diode to a slider and a TAR head in a HDD. The bond pad is deposited on a surface of the head that is perpendicular to the air bearing surface (ABS). The head is diced and lapped to expose the bond pad on a top surface of the head and mounted on a slider. The laser diode and a sub-mount may be coupled to the top surface of the slider—i.e., the surface opposite the ABS—by connecting to the bond pads. Specifically, both the laser diode and the sub-mount have electrodes thereon that are perpendicular to the bond pads. Conductive bonding material is used to bond the laser diode and the sub-mount to the bond pads.
    Type: Application
    Filed: November 30, 2011
    Publication date: May 30, 2013
    Inventors: Christian René Bonhôte, Linden James Crawforth, Toshiki Hirano, Fu-Ying Huang, Neil Leslie Robertson, Barry Cushing Stipe
  • Patent number: 8451707
    Abstract: A semiconductor wafer has a plurality of patterned thermally-assisted recording (TAR) head structures. Each TAR head structure includes a vertical-cavity surface-emitting laser (VCSEL). The semiconductor substrate serves as an extended cavity for the VCSEL. Each TAR head structure also includes a conventional read head and write head, and an optical waveguide with a grating coupler and a near-field transducer (NFT).
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: May 28, 2013
    Assignee: HGST Netherlands B.V.
    Inventor: Barry Cushing Stipe
  • Patent number: 8451696
    Abstract: A method and apparatus for providing a signal for driving a heating element in a TAR or HAMR enabled disk storage system that includes an optical transducer (or near-field optical source) for further focusing the beamspot of a laser onto a magnetic media, thereby heating the media. The storage system includes a temperature sensor proximate to the near-field transducer which provides a feedback loop to the laser driver to adjust the power of the laser.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: May 28, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Fu-Ying Huang, Lidu Huang, Chie Ching Poon, Xinjiang Shen, Barry Cushing Stipe
  • Publication number: 20130107390
    Abstract: A method and apparatus for providing a signal for driving a heating element in a TAR or HAMR enabled disk storage system that includes an optical transducer (or near-field optical source) for further focusing the beamspot of a laser onto a magnetic media, thereby heating the media. The storage system includes a temperature sensor proximate to the near-field transducer which provides a feedback loop to the laser driver to adjust the power of the laser.
    Type: Application
    Filed: October 31, 2011
    Publication date: May 2, 2013
    Inventors: Fu-Ying Huang, Lidu Huang, Chie Ching Poon, Xinjiang Shen, Barry Cushing Stipe
  • Patent number: 8416646
    Abstract: A thermally-assisted recording (TAR) disk drive uses “shingled” recording and a rectangular waveguide as a “wide-area” heat source. The waveguide generates a generally elliptically-shaped optical spot that heats an area of the recording layer extending across multiple data tracks. The waveguide core has an aspect ratio (cross-track width to along-the track thickness) that achieves the desired size of the heated area while locating the peak optical intensity close to the trailing edge of the write pole tip where writing occurs. The large cross-track width of the waveguide core increases the volume of recording layer heated by the optical spot, which reduces the rate of cooling. This moves the peak temperature point of the heated area closer to the write pole tip and reduces the temperature drop between the peak temperature and the temperature at the trailing edge of the write pole tip where writing occurs.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: April 9, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Fu-Ying Huang, Jia-Yang Juang, Hal J. Rosen, Barry Cushing Stipe, Timothy Carl Strand, Petrus Antonius VanDerHeijden
  • Patent number: 8411535
    Abstract: The present invention generally relates to electrically connecting a laser diode to a slider and head assembly of a TAR head in a HDD. The laser diode is coupled to a sub-mount. The laser diode and the sub-mount are coupled to the top surface of the slider and/or the head assembly. Either the slider, the head assembly or both have bond pads exposed through their respective top surfaces to provide an electrical connection to both the laser diode and the sub-mount. Both the laser diode and the sub-mount have electrodes thereon that are perpendicular to the bond pads and are in contact with the bond pads. Conductive bonding material is used to not only bond the laser diode and the sub-mount to the bond pads, but also to electrically connect the bond pads to the electrodes.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: April 2, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Toshiki Hirano, Fu-Ying Huang, Barry Cushing Stipe