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| Number | Title | Issue Date |
| 8179628 | Magnetic core plasmon antenna with improved coupling efficiency A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser generated plasmons in a magnetic core plasmon antenna to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. To enable the TAMR head to o... | 05/15/2012 |
| 8169731 | Near-field light transducer comprising propagation edge with predetermined curvature radius Provided is a near-field light transducer with a propagation edge in which the generation of defects is suppressed. The transducer is formed of a Ag alloy and comprises an edge, the edge comprising a portion to be coupled with a light in a surface plasmon mode, the ... | 05/01/2012 |
| 8159769 | Heat-assisted magnetic recording with shaped magnetic and thermal fields to minimize transition curvature Devices and methods are provided for heat-assisted magnetic recording (HAMR). In an illustrative example, a device includes a magnetic write pole having a convex pole tip; a magnetic opposing pole longitudinally displaced from the magnetic write pole; and a thermal-... | 04/17/2012 |
| 8134794 | Method and system for providing an energy assisted magnetic recording head in a wafer packaging configuration A method and system for providing energy assisted magnetic recording (EAMR) heads are described. The heads include sliders having leading and trailing edges. An EAMR transducer for each head is fabricated on a front face of a substrate that corresponds to the traili... | 03/13/2012 |
| 8116034 | Thermally assisted magnetic head having main pole arranged between near-field light-generating portions and manufacturing method of same When first and second near-field light-generating portions are irradiated with laser light or other energy rays, near-field light is generated at the tips of both the near-field light-generating portions. By means of the near-field light thus generated, a magnetic r... | 02/14/2012 |
| 8077418 | Reducing thermal protrusion of a near field transducer in an energy assisted magnetic recording head Methods of fabricating an energy-assisted magnetic recording (EAMR) head to compensate for a heat-induced protrusion of a near field transducer formed therein are disclosed. The methods can include applying optical power to the near field transducer to generate heat... | 12/13/2011 |
| 8059354 | Transducer for data storage device An apparatus includes a metallic transducer and a condenser for directing electromagnetic radiation onto the transducer. The transducer includes a first section and a second section, wherein the first section is wider than the second section and has a width to lengt... | 11/15/2011 |
| 8054570 | Recording head and data recording and reproducing apparatus A recording head includes a slider, and a recording element fixed to a side surface of the slider on the side of an outflow end and having a main magnetic pole and an auxiliary magnetic pole which generate a recording magnetic field. A spot light generating element ... | 11/08/2011 |
| 8054571 | Thermally assisted magnetic recording head and magnetic recording apparatus A thermally assisted magnetic recording head includes a flying slider, a magnetic field generation device mounted on the flying slider, a first waveguide disposed near the magnetic field generation device for guiding incident light from a top surface of the flying s... | 11/08/2011 |
| 8031426 | Thin-film magnetic head having microwave magnetic exciting function and magnetic recording and reproducing apparatus A thin-film magnetic head having microwave magnetic exciting function, includes a write magnetic field production unit for producing, in response to a write signal, a write magnetic field to be applied into a magnetic recording medium, a line conductor of a microwav... | 10/04/2011 |
| 8031425 | Writing and reading multi-layer continuous magnetic recording media, with more than two recording layers A method and apparatus for writing magnetization states in magnetic layers of a multi-layer continuous magnetic recording medium with more than two recording levels and a method and apparatus for reading readback pulse shapes representing a magnetization state trans... | 10/04/2011 |
| 8027116 | Method of manufacturing a hard-disk drive using a bulk eraser A method of manufacturing of a hard-disk drive using a bulk eraser for erasing recorded information on a magnetic-recording disk. The method includes providing a bulk eraser that produces magnetic-flux density in a gap sufficient to erase recorded information from a... | 09/27/2011 |
| 8023218 | Electric field assisted magnetic recording We describe a system for electric field assisted magnetic recording where a recordable magnetic medium includes a magnetic recording layer of high coercivity and vertical magnetic anisotropy that is adjacent to an electrostrictive layer which can be placed in a stat... | 09/20/2011 |
| 8018672 | Magnetic recording device and magnetic recording method thereof A magnetic recording device according to one embodiment includes a magnetic recording medium having a magnetic recording layer; a recording element positioned on a head slider; an assistance element for supplying assistance energy to an area on the recording layer t... | 09/13/2011 |
| 8014096 | Combined bulk thermal-assister and bulk eraser A combined bulk thermal-assister and bulk eraser. The bulk thermal-assister is configured to produce a temperature in a magnetic-recording disk in a hard-disk drive when the hard-disk drive is disposed in the bulk eraser. The temperature is about equal to a second t... | 09/06/2011 |
| 7990647 | Thermally assisted recording head control means for protrusion management Methods and structures for improving fly height control for thin film write heads utilized in thermally assisted recording are disclosed. Methods include the use of the TAR near field light source to provide a preheating pulse to improve the transient response when ... | 08/02/2011 |
| 7986481 | Magnetic reproducing method for suppressing low temperature noise Provided is a magnetic reproducing method that enables a thin-film magnetic head including a head element for reading data signals which has a noise in its output due to a low temperature to bring out an excellent read characteristic in which the noise is suppressed... | 07/26/2011 |
| 7982995 | Method of writing data using coercivity distribution of data storage medium A method of writing data using a coercivity distribution of a data storage medium, including mapping the coercivity distribution of the data storage medium including a plurality of write spots in which data can be written, measuring a current ambient temperature, an... | 07/19/2011 |
| 7982996 | Perpendicular magnetic recording write head and system with improved spin torque oscillator for microwave-assisted magnetic recording A microwave-assisted magnetic recording (MAMR) write head and system has a spin-torque oscillator (STO) located between the write pole of the write head and a trailing shield that alters the write field from the write pole. The STO is a stack of layers whose planes ... | 07/19/2011 |
| 7974043 | Thermally assisted magnetic head A thermally assisted magnetic head has a slider having a medium-facing surface, and a light source unit having a light source support substrate, and a light source disposed on the light source support substrate; the slider has a slider substrate and a magnetic head ... | 07/05/2011 |
| 7965464 | Heat-assisted magnetic recording with shaped magnetic and thermal fields Devices and methods are provided for heat-assisted magnetic recording (HAMR). In an illustrative example, a device includes a magnetic write pole having a convex pole tip; a magnetic opposing pole longitudinally displaced from the magnetic write pole; and a thermal-... | 06/21/2011 |
| 7961417 | Heat assisted magnetic recording apparatus having a plurality of near-field transducers in a recording media An apparatus includes a recording media including a substrate, a plurality of islands of magnetic material on the substrate, and a non-magnetic material between the islands, a recording head having an air bearing surface positioned adjacent to the recording media, a... | 06/14/2011 |
| 7957086 | Hard disk drive apparatus, method to control flying height of magnetic head thereof, and recording media for computer program therefor A method of controlling a flying height of a magnetic head of a hard disk drive apparatus includes producing a reference FOD (flying on demand) voltage profile defining a relationship between the flying height of the magnetic head and an FOD voltage at a measured te... | 06/07/2011 |
| 7957085 | Thermally assisted magnetic head, head gimbal assembly, and hard disk drive A thermally assisted magnetic head has a slider substrate having a first surface located on the opposite side to a medium-facing surface, and side surfaces located between the medium-facing surface and the first surface; a magnetic head portion having a waveguide ha... | 06/07/2011 |
| 7952827 | Heat-assisted magnetic recording method using eddy current and head for heat-assisted magnetic recording A heat-assisted magnetic head that can efficiently and locally heat a magnetic recording medium. The head includes a heating coil element, and a write head element for writing data signals by generating a signal magnetic field, and a read head element for reading da... | 05/31/2011 |
| 7940487 | Heating a head disk assembly for a time interval prior to writing spiral servo tracks to the disk A method of writing spiral servo tracks to a disk of a disk drive is disclosed. The disk is heated by applying a heating power to a heater for a time interval. After the time interval, the heating power is reduced, and the spiral servo tracks are written to the disk... | 05/10/2011 |
| 7940486 | Thermally assisted magnetic head, head gimbal assembly, and hard disk drive A laser diode is fixed to a light source support substrate and a first surface of a slider substrate is fixed to a second surface of the light source support substrate; therefore, the slider substrate and the laser diode are kept in a fixed positional relation. Sinc... | 05/10/2011 |
| 7936531 | Thermally assisted magnetic head having an asymmetric plasmon antenna and manufacturing method thereof The thermally assisted magnetic head according to the present invention comprises a medium-facing surface, a main magnetic pole provided on the medium-facing surface, and a plasmon antenna provided on the medium-facing surface, in the vicinity of the main magnetic p... | 05/03/2011 |
| 7929239 | Data storage apparatus including optically active nano-patterned media and electric field assisted recording method An apparatus comprises a data storage medium including a magnetic recording element and an optically active material positioned adjacent to the magnetic recording element, an electric field source for applying an electric field to a portion of the data storage mediu... | 04/19/2011 |
| 7898759 | Thermally assisted magnetic recording head and magnetic recording apparatus A second waveguide is formed near a first waveguide for guiding light to the vicinity of a main pole of a thermally assisted magnetic recording head, and a portion of light propagated through the waveguide 1 is branched to the second waveguide. The light tran... | 03/01/2011 |
| 7885029 | Thermally-assisted magnetic recording head and thermally-assisted magnetic recording method A head capable of favorite thermally-assisted magnetic recording without depending on the use of a near-field light generator is provided. The head comprises a write head element formed on the trailing side from a waveguide and comprising a first main pole. The firs... | 02/08/2011 |
| 7880995 | Method, system, and computer program product for thermally assisted recording systems A method according to one embodiment comprises using a heating device, inducing localized heating on a magnetic medium during a recording operation; detecting a temperature in a vicinity of the heating device; detecting a current of the heating device; and performin... | 02/01/2011 |
| 7880997 | Magnetic recording apparatus and magnetic recording medium In the magnetic recording apparatus, a recording layer is formed in a concavo-convex pattern, and recording elements are formed of convex portions of the concavo-convex pattern. Furthermore, the following equation (I) BL≦ERL... | 02/01/2011 |
| 7880996 | Ridge wave-guide for thermal assisted magnetic recording According to one embodiment, an apparatus includes a near field transducer comprising a conductive metal film having a main body with front and back edges and a ridge extending from the front edge of the main body. Also, the apparatus includes an optical waveguide f... | 02/01/2011 |
| 7864475 | Thermally assisted magnetic recording system and thermally assisted magnetic recording Heating power control is performed in thermally assisted magnetic recording using a patterned recording medium. Trial writing is performed by continuously changing a heating power intensity with respect to a pattern row of a trial writing area provided in plurality ... | 01/04/2011 |
| 7864474 | Disk drive and control method thereof Embodiments in accordance with the present invention reduce the number of errors caused by the aged deterioration of a heater for adjusting the clearance between a head and a disk. According to one embodiment, a thermal fly height control (TFC) controller executes t... | 01/04/2011 |
| 7852587 | Thermal assisted recording (TAR) disk drive capable of controlling the write pulses A patterned-media magnetic recording disk drive uses an optical system for accurately clocking the write data. The disk has concentric data tracks patterned into discrete magnetizable data islands with nonmagnetic spaces between the islands. As the disk rotates, a r... | 12/14/2010 |
| 7835101 | Planar plasmon antenna for use in near-field recording A planar plasmon antenna is formed on a YZ plane including a Z-axis, the Z-axis being a propagation direction of excitation light for near-field light generation. The longitudinal direction of the planar plasmon antenna is oblique relative to the Y-axis, and the ang... | 11/16/2010 |
| 7835102 | Heat assisted magnetic recording head comprising plasmon antenna with flat surfaces opposed to medium Provided is a plasmon antenna in which a near-field light having a sufficient intensity is generated only in a desired location. The plasmon antenna comprises an end surface on a side where a near-field light is generated; the end surface is flat and has a shape wit... | 11/16/2010 |
| 7821732 | Thermally assisted magnetic head having an asymmetric plasmon antenna and manufacturing method thereof A thermally assisted magnetic head according to the present invention includes: a medium-facing surface, a main magnetic pole provided on the medium-facing surface, and a plasmon antenna provided on the medium-facing surface in the vicinity of the main magnetic pole... | 10/26/2010 |
