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8179747 |
Thermally assisted magnetic head
A thermally assisted magnetic head includes a slider and a light source unit. The light source unit includes a semiconductor laser diode. The semiconductor laser diode includes an n-type...
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8179624 |
Method and apparatus for evaluating a magnetic recording medium
A method of evaluating a magnetic recording medium using a magnetic head having a reproduction element is disclosed The method includes the steps of (a) recording a signal in a predetermined area...
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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...
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8170389 |
Optical waveguide, and thermally-assisted magnetic recording head including the same
An optical waveguide includes a core and a clad. The core includes first to third propagation parts, and a coupling part that couples the first to third propagation parts together. The first...
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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...
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8164988 |
All-optical magnetic recording system using circularly polarized light and bit-patterned media
A perpendicular magnetic recording system uses bit-patterned media (BPM) and circularly polarized light to switch the magnetization of the discrete magnetic bits by the inverse Faraday effect....
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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...
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8149654 |
Wave guide that attenuates evanescent light of higher order TM mode
A waveguide has a core through which laser light can propagate in a TM mode, that has a rectangular cross section perpendicular to a propagative direction of the laser light, and through which the...
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8149541 |
System for controlling contact location during TFC touchdown and methods thereof
A system according to one embodiment includes a thin film stack having a magnetic transducer and a contact pad; and a heater in the thin film stack for inducing thermal protrusion of a media-facing...
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8149652 |
Compensating the effects of static head-media spacing variations and nonlinear transition shift in heat assisted magnetic recording
An apparatus comprises a storage medium, a recording head, a source of electromagnetic radiation, and a control circuit for modulating the source of electromagnetic radiation in response to a...
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8144427 |
Magnetic head, head assembly and magnetic recording/reproducing apparatus
The present invention relates to a magnetic head, a head assembly, and a magnetic recording/reproducing apparatus which are capable of effectively detecting thermal asperity. The magnetic head...
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8144418 |
Test device for magnetic storage device, magnetic storage device, and method of manufacturing magnetic storage device
According to one embodiment, a test device for a storage device includes: a module configured to acquire from the storage device a value corresponding to a signal level read from a magnetic disk...
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8139447 |
Heat-assisted magnetic recording head with near-field light generating element
A heat-assisted magnetic recording head includes a magnetic pole, a waveguide, a near-field light generating element, and a substrate on which they are stacked. The near-field light generating...
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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...
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8130457 |
Magnetic recording/reproducing apparatus and method for determining magnetic recording condition
A magnetic recording/reproducing apparatus 100 includes: a magnetic head 1; a magnetic recording medium 2; a spindle 3 and a spindle motor 4; a suspension arm 5; a voice coil motor 6; and a control...
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8130599 |
Thermally-assisted magnetic recording head comprising near-field optical device with propagation edge
There is provided a near-field-light (NFL) generating optical system in which the point where near-field (NF) light is generated can be provided sufficiently close to the end surface of a magnetic...
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8125727 |
Disk drive and method for adjusting common-mode voltage of an element on a head-slider
A disk drive. The disk drive includes a disk configured to store data, a motor configured to rotate the disk, a head-slider and a controller. The head-slider includes a slider configured to fly in...
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8116172 |
Near-field light generating device including surface plasmon generating element
A near-field light generating device includes: a base having a top surface; a waveguide that allows laser light to propagate therethrough and is disposed above the top surface of the base; and a...
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8116173 |
Heat-assisted magnetic recording head with laser diode
A heat-assisted magnetic recording head includes a slider, and an edge-emitting laser diode fixed to the slider. The slider has a waveguide and an overcoat layer that covers the waveguide. The...
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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...
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8116174 |
Near field light generating device, optically assisted magnetic recording head, optically assisted magnetic recording device, near field optical microscope and near field light exposure apparatus
Disclosed is a near field light generating device comprising a first medium layer which transmits light from a light source. This near field light generating device generates near field light by...
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8111486 |
Head gimbals assembly of hard disk and method of assembling thereof
A head gimbals assembly for a hard disk for use in a thermally assisted magnetic disk recording medium, in which a laser diode is applied so as to record information with high density. The head...
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8111591 |
Heat-assisted magnetic recording head having laser diode overlaping two recording wiring layers
A heat-assisted magnetic recording head includes a slider, and an edge-emitting laser diode fixed to the slider. The slider includes: a substrate; and an MR element, two reproduction wiring layers,...
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8107325 |
Near-field light generating element comprising surface plasmon antenna with surface or edge opposed to waveguide
Provided is a near-field light generating element in which reduced is the propagation loss of excited surface plasmon that propagates to the near-field light generating end. The element comprises:...
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8098455 |
Wire-assisted magnetic write device with phase shifted current
A magnetic device includes a write element having a write element tip and a conductive coil for carrying a current to induce a first field from the write element. A conductor proximate the write...
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8098547 |
Optical waveguide and thermal assist magnetic recording head therewith
An optical waveguide, on account of its ability to apply phase resonance of a wavelength and of a first and second triangular plate-like spot size converter members formed of the same material as a...
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8094399 |
Magnetic recording apparatus provided with microwave-assisted head
A magnetic recording apparatus includes a magnetic recording medium having a magnetic recording layer, a thin-film magnetic head with a microwave-band magnetic drive function, the head having a...
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8094523 |
Heat-assisted magnetic recording medium and magnetic recording apparatus with the medium
Provided is a magnetic recording medium that generates near-field light within itself and enables favorable heat-assisted magnetic recording with this near-field light. The medium comprises: a...
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8089830 |
Near-field light generating device including near-field light generating element with edge part opposed to waveguide
A near-field light generating device includes: a waveguide having a groove that opens in the top surface; a clad layer disposed on the top surface of the waveguide and having an opening that is...
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RE43056 |
Super resolution information reproduction by tracking address information in normal resolution
An optical disk includes: a substrate shaped in a disk, and having a recording surface; a plurality of recording tracks formed substantially coaxially on the recording surface; a plurality of...
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8081542 |
Thermally-assisted recording (TAR) disk drive with patterned multilevel media and laser with power modulation
A thermally-assisted recording (TAR) patterned-media magnetic recording disk drive has a perpendicular patterned-media disk with multilevel data islands and a laser capable of supplying multiple...
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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...
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8072847 |
Optical device, optically heat assisted magnetic recording head and optically heat assisted magnetic recording apparatus, having intensity point deviated from axis of the core
Provided are an optical device, optically assisted magnetic recording head and optically assisted magnetic recording apparatus that effectively emit the introduced light, from the apex portion of a...
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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...
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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...
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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...
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8040634 |
Magnetic head suspension
A magnetic head suspension having a thin metallic plate as a substrate which is caused to have a new function besides a function as a spring. The magnetic head suspension plural lines for...
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8036069 |
Plasmon shield to shape and reduce optical spot
A TAMR head is disclosed with a triangular shaped plasmon antenna covered on two sides with a plasmon layer that generates an edge plasmon mode along a vertex of the two plasmon sides formed...
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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...
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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...
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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...
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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...
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8023379 |
Defect inspection method and disk drive using same
Provided are a disk defect inspection method and apparatus. The defect inspection method includes; determining an independent recording density value for disk defect detection in relation to disk...
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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...
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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...
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8000178 |
Near-field light generating element utilizing surface plasmon
Provided is a surface plasmon antenna that can be set so that the emitting position on the end surface of the plasmon antenna where near-field light is emitted is located sufficiently close to the...
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8000175 |
Thermally assisted magnetic head having a semiconductor surface-emitting laser
A thermally assisted magnetic head includes: a slider having a medium-facing surface; and a surface-emitting semiconductor laser. The slider has: a slider substrate, on which part of the...
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7995425 |
Power control of TAMR element during read/write transition
A slider mounted TAMR (Thermal Assisted Magnetic Recording), DFH (Dynamic Flying Height) type read/write head using optical-laser generated surface plasmons in a small antenna to locally heat a...
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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...
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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...
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