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Dynamic magnetic information storage or retrieval June invention type 06/10

Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application.
  
06/24/2010 > patent applications in patent subcategories. invention type

20100157454 - Head-disk contact detection and work function difference determination: In a method of head-disk contact detection in a hard disk drive, a Radio Frequency (RF) carrier signal is injected into a slider which is flying above a surface of a disk in a hard disk drive. A modulated version of the RF carrier signal is received from the slider.... Agent: Hitachi C/o Wagner Blecher LLP

20100157456 - Disk drive and method of measuring frictional characteristics: According to one embodiment, in a disk drive, a voice coil motor is controlled to cause a head to minutely vibrate in a radial direction on a track of a disk. When the voice coil motor vibrates the head in the radial direction of the disk, frictional force occurring between... Agent: Knobbe Martens Olson & Bear LLP

20100157455 - 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 through a magnetic head of the storage device, at a first timing at which an initial power... Agent: Knobbe Martens Olson & Bear LLP

20100157457 - Electrical interconnect system with integrated transmission- line compensation components: Impedance compensation features are used along the transmission-line path between a transmitter/driver/source and the receiver/transducer to compensate for the impedance discontinuities or mismatches (for example, those caused by physical interconnection features) and/or to improve the frequency response of the signal transfer along the transmission line. The impedance compensation features are... Agent: Marlin Knight

20100157458 - Systems and methods for dibit correction: Various embodiments of the present invention provide systems and methods for providing a corrected dibit signal. As an example, various embodiments of the present invention provide dibit correction circuits. Such dibit correction circuits include a dibit sample buffer, a maximum sample detector circuit, a side sample detector circuit, and a... Agent: Hamilton,desanctis & Cha (lsi)

20100157459 - Systems and methods for controlling data equalization: Various embodiments of the present invention provide systems and methods for performing data equalization. For example, various embodiments of the present invention provide data equalization circuits that include an equalization circuit and a transition adjustment circuit. The equalization circuit receives a series of at least two original data bits and... Agent: Hamilton,desanctis & Cha (lsi)

20100157461 - Signal reproducing circuit, magnetic storage device, and signal reproducing method: According to one embodiment, a signal reproducing circuit reproduces a signal read from a recording medium on which the signal has been recorded by perpendicular magnetic recording. The signal reproducing circuit includes a waveform equalizer that equalizes the waveform of the signal based on a waveform equalization target, where D... Agent: Knobbe Martens Olson & Bear LLP

20100157460 - Systems and methods for generating equalization data: Various embodiments of the present invention provide systems and methods for using data equalization. For example, various embodiments of the present invention provide storage devices that include a semiconductor device having an equalization unit and a digital-to-analog converter, a read/write head assembly located in close proximity to the semiconductor device,... Agent: Hamilton,desanctis & Cha (lsi)

20100157462 - Magnetic disk drive: According to one embodiment, a magnetic disk drive includes a magnetic disk to be subjected to perpendicular recording, a first pole core including a main pole configured to record signals on the magnetic disk, a first coil wound around the first pole core, a second pole core magnetically independent of... Agent: Knobbe Martens Olson & Bear LLP

20100157463 - Disk drive spin control: A disk drive configured to control spindle spin is provided. The disk drive includes a spindle motor for spinning a disk configured for storing data, a nonvolatile memory comprising instructions associated with a first process for spin-up of the spindle motor from a power-on mode and the nonvolatile memory comprising... Agent: Hitachi C/o Wagner Blecher LLP

20100157465 - Current perpendicular to plane (cpp) magnetic read head: One general embodiment of the present invention is a magnetic read head including a magnetoresistive sensor where sense current flows in a stacking direction of the magnetoresistive sensor, i.e., perpendicular to the plane of the layers of the head. The magnetoresistive sensor comprises a free layer having a magnetization direction... Agent: Zilka-kotab, PC- Hit

20100157466 - Magnetic disk device, control device and control method: According to one embodiment, a magnetic disk device, includes: a magnetic disk; a magnetic head; a writing module configured to write data to a predetermined first track in at least one of the areas by the magnetic head; a reading module configured to read, by using the magnetic head, data... Agent: Knobbe Martens Olson & Bear LLP

20100157467 - Quiet retraction system: A quiet retraction method for regulating constant velocity while parking an arm within a disk drive is described. The method comprises the steps of: driving a motor for the arm using a first drive current for a first period; floating the motor; sampling a back electromotive force (bemf) for a... Agent: Texas Instruments Incorporated

20100157464 - Systems and methods for adaptive mra compensation: Various embodiments of the present invention provide systems and methods for reducing head distortion. For example, various embodiments of the present invention provide storage devices that include a storage medium, a read/write head assembly, and an adaptive distortion modification circuit. The storage medium includes information that may be sensed by... Agent: Hamilton,desanctis & Cha (lsi)

20100157469 - Disk drive using an airflow reduction plate and methods of manufacturing thereof: In order to effectively reduce disk flutter in a disk drive by using simple structures and efficient manufacturing techniques, a disk drive, in one embodiment, includes a base, a spindle motor coupled to the bottom of the base, a disk coupled to and rotated by a rotational shaft of the... Agent: Zilka-kotab, PC- Hit

20100157468 - Reducing a spreading of contaminants within a hard disk drive: Reducing a spreading of contaminants within a hard disk drive is described. An adhesive is applied to a first side of a desiccant. Then, the desiccant is utilized to cover a component of a hard disk drive, the component comprising a countersink area surrounding a fastener, wherein said fastener is... Agent: Hitachi C/o Wagner Blecher LLP

20100157470 - Methods for creating slanted perpendicular magnetic pole via metal liftoff: A method in one embodiment includes forming a resist structure above an upper surface of a substrate, wherein a portion of the upper surface of the substrate is a shaping layer, wherein the resist structure has an undercut; depositing a layer of magnetic material above exposed regions of the substrate,... Agent: Zilka-kotab, PC- Hit

20100157471 - Write head with different upper and lower yoke lengths and methods for making the same: According to one embodiment, a system comprises an upper yoke having a first length defined between a pole tip thereof and a back gap thereof. In addition, the system includes a lower yoke having a second length defined between a pole tip thereof and a back gap thereof, the second... Agent: Zilka-kotab, PC- Hit

20100157472 - Magnetic write head having a self-aligned side wrap-around shield with multi-angle slanted bump: A method for forming a magnetic write head having a trailing shield with a tapered and stepped, self aligned trailing magnetic shield. The shield has a tapered portion that tapers away from the write pole as it extends away from the ABS. This tapered portion helps to channel flux to... Agent: Zilka-kotab, PC- Hit

20100157473 - Magnetic disk drive: According to one embodiment, a magnetic disk drive includes a magnetic disk including a magnetic recording layer exhibiting perpendicular magnetic anisotropy, a write head including a core including a main pole and a plurality of return poles in a track direction and a direction other than the track direction with... Agent: Knobbe Martens Olson & Bear LLP

20100157476 - Perpendicular magnetic recording head: A perpendicular magnetic recording head according to one embodiment includes a main pole; first magnetic films arranged on both sides of the main pole in a track width direction via nonmagnetic films; and a second magnetic film arranged on a trailing side of the main pole via a nonmagnetic film;... Agent: Zilka-kotab, PC- Hit

20100157475 - Stepped main pole for perpendicular write heads in hard disk drives and method of making same: A stepped main pole for a perpendicular write head and methods of making the stepped main pole. The stepped main pole has a main pole tip and a base portion. The main pole tip has a surface that forms part of the ABS and a first thickness. The base portion... Agent: Patterson & Sheridan, L.L.P.

20100157477 - Thin-film magnetic-recording head including built-in acoustic-emission sensor: A thin-film magnetic-recording head. The thin-film magnetic-recording head includes a read/write element portion, at least one built-in thin-film acoustic-emission sensor, and a heater. The read/write element portion, the thin-film acoustic-emission sensor and the heater are integrally formed in proximity to a face of an electrically conductive slider substrate over which... Agent: Hitachi C/o Wagner Blecher LLP

20100157474 - Method of multi-angled bump processing for magnetic pole fabrication and systems thereof: A system according to one embodiment includes a magnetic pole; a bump structure above the pole, the bump structure having a first surface oriented at a first angle between 1° and 89° from a plane of deposition of the pole, and a second surface oriented at a second angle between... Agent: Zilka-kotab, PC- Hit

20100157478 - System and method for storage of digital assets: A storage apparatus is provided. A storage apparatus can include a storage device having one or more unique device identifiers disposed in, on, or about the storage apparatus. One or more computer readable and writeable data storage areas can be disposed in, on, or about the storage apparatus. One or... Agent: Hewlett-packard Company Intellectual Property Administration

20100157479 - Slider, storage device having the slider, and method of manufacturing suspension assembly having the slider, and storage device: According to one embodiment, a slider of a head includes is configured to fly from a surface of a disk. The slider includes a floating surface configured to oppose the surface of the disk, a positive pressure section in the floating, configured to produce floating force in conjunction with airflow... Agent: Knobbe Martens Olson & Bear LLP

20100157480 - Head slider and storage device: According to one embodiment, a head slider includes a center pad, a pair of center rails, and a center rail connection wall. The center pad is located in the center on the air outflow end side. The center rails extend toward the air inflow end side continuously from the center... Agent: Knobbe Martens Olson & Bear LLP

20100157481 - Magnetic disk drive: According to one embodiment, a magnetic disk drive includes a magnetic disk including a recording surface, a head gimbal assembly including a slider in which a head is incorporated and a tab, and a ramp in a vicinity of the magnetic disk, the ramp including a first counter surface opposed... Agent: Knobbe Martens Olson & Bear LLP

20100157482 - Suspension substrate, suspension, suspension with head and hard disk drive: A main object of the present invention is to provide a suspension substrate which can decrease the whole thickness thereof and limit the generation of warpage. To attain the object, the present invention provides a suspension substrate comprising: an insulation layer, a pair of wirings consisting of an upper wiring... Agent: Ladas & Parry LLP

20100157483 - Magnetic head slider inhibiting a side erase and method of manufacturing thereof: In one embodiment, a magnetic head slider includes a write head having a single magnetic pole, the single magnetic pole having a main magnetic pole piece that extends to a medium opposing surface facing a magnetic disk. The main magnetic pole piece generates a recording magnetic field from a medium... Agent: Zilka-kotab, PC- Hit

20100157484 - Perpendicular recording magnetic head with a varying interval between the main pole and the shield, and methods of manufacturing thereof: A perpendicular recording magnetic head is provided, according to one embodiment, in which even if a thickness of a main pole is reduced corresponding to a reduction in a recording track width, recording performance is not degraded. A magnetic-field auxiliary pole and a nonmagnetic layer are stacked on a main... Agent: Zilka-kotab, PC- Hit

20100157485 - Wavelets-based detection of proximity between a sensor and an object: A circuit includes a proximity detection component that applies wavelet analysis to a sensed signal from a sensor and responsively provides an output indicative of whether proximity exists between the sensor and an object that causes the sensor to produce the sensed signal.... Agent: Seagate Technology LLC C/o Westman, Champlin & Kelly, P.A.

  
06/17/2010 > patent applications in patent subcategories. invention type

20100149673 - Method for testng mold structure, mold structure, and magnetic recording medium: A method for testing a mold structure including magnetically transferring a magnetic signal according to a concavo-convex pattern for a servo area in a mold structure to a perpendicular magnetic recording medium; electrically reproducing ≧50 tracks of the magnetic signal of servo data transferred onto the perpendicular magnetic recording medium... Agent: Young & Thompson

20100149674 - Method of manufacturing disk device, method of writing servo information to storage disk, and disk device: According to one embodiment, a method of writing servo information comprises: moving a head at a predetermined pitch in the radial direction of a storage disk to write servo information to each radial direction position in the circumferential direction of the storage disk; detecting a positional deviation value of the... Agent: Knobbe Martens Olson & Bear LLP

20100149675 - Skip block writing for bit patterned media write synchronization: A method for synchronizing writing to a bit patterned media includes: reading bits from skipped blocks on the bit patterned media, using timing of bits read from the skipped blocks to update a write clock, and writing request data to physical blocks on the bit patterned media, interleaved with the... Agent: Pietragallo Gordon Alfano Bosick & Raspanti, LLP

20100149676 - Three-dimensional magnetic recording: A multilayered three-dimensional media having a plurality of magnetic sublayers, each of the magnetic sublayers being separated from one another by a non-magnetic layer. The plurality of magnetic sublayers can be a stack of one or more coupled Co/Pd or Co/Pt layers; a layer of Co—Cr alloys optionally containing TiO2,... Agent: Buchanan, Ingersoll & Rooney PC

20100149679 - Bulk eraser including at least three magnets configured for erasing recorded information: A bulk eraser for erasing recorded information on a magnetic-recording disk. The bulk eraser includes at least three magnets and a structure magnetically coupled with the at least three magnets to produce magnetic-flux density in a gap. The gap has a first portion, a second portion and a third portion,... Agent: Hitachi C/o Wagner Blecher LLP

20100149678 - 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 magnetic-recording disk, a hard-disk drive, a disk-stack having at... Agent: Hitachi C/o Wagner Blecher LLP

20100149677 - Self-spinning disk bulk erasure for hard disk assembly: A method for erasing a disk of a hard disk drive. The method includes moving the hard disk drive adjacent to an erasure head that emanates a magnetic field. The magnetic field and moving hard disk drive cause a disk of the hard disk drive to spin under a Lorentz... Agent: Irell & Manella LLP

20100149680 - Method of manufacturing magnetic recording medium, magnetic recording medium, and magnetic recording reproducing apparatus: The present invention provides a method of manufacturing a magnetic recording medium where at least a magnetic layer is formed on a non-magnetic substrate and a magnetically separated magnetic recording pattern is formed on the magnetic layer, including: a magnetic recording pattern forming process of forming magnetic recording areas that... Agent: Sughrue Mion, PLLC

20100149681 - Recording method and storage device: According to one embodiment, a recording method includes: skipping a track by a skip amount in a skip region smaller than an overall recording region on a magnetic recording medium by using an extra region that is unnecessary for securing a storage capacity to be provided by a storage device,... Agent: Knobbe Martens Olson & Bear LLP

20100149682 - Dynamic pitch and roll sensing in hard disk drives: A head for a hard disk drive that includes a primary read element and a first sensor read element coupled to a head body. The first sensor read element is offset from the primary read element. The first sensor read element provides a read signal that can be analyzed to... Agent: Irell & Manella LLP

20100149683 - Magnetic disk drive and write offset correction method therein: According to one embodiment, a magnetic disk drive uses a patterned medium on which data tracks having a recording layer and grooves having no recording layer as a disk. The magnetic disk drive includes a correction unit which corrects the head center position of a write head so that a... Agent: Knobbe Martens Olson & Bear LLP

20100149684 - Data-storage device and analysis method for data-storage device: A data-storage device with a security function for user data stored in a data-storage medium. The data-storage device includes: the data-storage medium for storing data; an authentication processing section for performing an authentication process with a key obtained from a host; an error correction circuit for performing error correction in... Agent: Hitachi C/o Wagner Blecher LLP

20100149685 - Multi-channel thin-film magnetic head, magnetic tape drive apparatus with the multi-channel thin-film magnetic head and manufacturing method of multi-channel thin-film magnetic head: A multi-channel thin-film magnetic head includes a substrate, a plurality of thin-film magnetic head elements formed on the substrate, a closure fixed onto the plurality of thin-film magnetic head elements, a protection film laminated on a whole area of a TBS of the plurality of thin-film magnetic head elements and... Agent: Oliff & Berridge, PLC

20100149686 - Disk drive: According to one embodiment, a disk drive includes a carriage supporting a head configured to perform information processing for the recording medium, and a latch mechanism configured to latch and hold the carriage in a retracted position when an external force acts on the disk drive with the carriage being... Agent: Knobbe Martens Olson & Bear LLP

20100149687 - Magnetic head that suppresses protrusion of medium facing surface caused by heat of coil: A magnetic head includes a coil, a pole layer, and a coil adjacent layer. The coil includes a winding portion having two side surfaces. The coil adjacent layer is adjacent to at least part of the whole of the two side surfaces of the winding portion. The coil adjacent layer... Agent: Oliff & Berridge, PLC

20100149688 - Perpendicular-magnetic-recording head with leading-edge taper of a planarized stepped-pole layer having greater recess distance than a flare-point of a main-pole layer: Perpendicular-magnetic-recording head with leading-edge taper of a planarized stepped-pole layer having greater recess distance than a flare point of a main-pole layer. The perpendicular-magnetic-recording head includes a write element including the main-pole layer having the flare point recessed a first distance from a pole tip of the main-pole layer at... Agent: Hitachi C/o Wagner Blecher LLP

20100149690 - Magnetic head, method of manufacturing magnetic head, actuator, and magnetic disk device: According to one embodiment, a magnetic head includes a write element, a first insulating member, and a second insulating member. The first insulating member is made of an insulating material with high rigidity. The first insulating member is formed around the write element as a surface layer of the floating... Agent: Knobbe Martens Olson & Bear LLP

20100149689 - Thin film magnetic head having a pair of magnetic layers whose magnetization is controlled by shield layer including amorphous layer: A thin film magnetic head includes a magnetoresistance (MR) layered body that has first and second magnetic layers whose magnetization direction are changed according to an external magnetic field, a nonmagnetic middle layer and where the first magnetic layer, the nonmagnetic middle layer and the second magnetic layer are disposed... Agent: Posz Law Group, PLC

20100149691 - Head, head suspension assembly, and disk drive provided with the same: According to an embodiment, a slider of a head is provided with a negative-pressure cavity 54 formed in a disk-facing surface, a leading step portion located on the upstream side of the negative-pressure cavity, a pair of side portions opposed to each other, a head mounting pad provided on the... Agent: Knobbe Martens Olson & Bear LLP

20100149692 - Head slider and storage device: According to one embodiment, a head slider includes a slider main body, a front rail, and at least a pair of grooves. The slider main body defines a base surface. The front rail rises from the base surface on the air inflow side of the slider main body and defines... Agent: Knobbe Martens Olson & Bear LLP

20100149693 - Head-slider including a low-surface-energy film that prevents lubricant accumulation, head-arm assembly including the head-slider, and hard-disk drive including the head-arm assembly: The head-slider is configured to receive an air-stream produced by rotation of a magnetic-recording disk and is configured to fly in proximity with a recording surface of the magnetic-recording disk. The head-slider includes a trailing edge on an outflow side of the air-stream, and a disk-facing surface that is configured... Agent: Hitachi C/o Wagner Blecher LLP

20100149694 - Disk device: According to an embodiment, a disk device includes a latch mechanism configured to retract a head on a distal end portion of an actuator to a ramp mechanism and latch a ferromagnetic member disposed on the actuator on the side of a motor coil by a latch magnet, a shaft... Agent: Knobbe Martens Olson & Bear LLP

20100149695 - Head actuator velocity control for electrical power off in a disk drive: A hard disk drive with a voice coil motor coupled to a head. The head is coupled to a disk that is rotated by a spindle motor. The spindle motor generates a back-emf current. The disk drive also includes a drive circuit that causes the voice coil motor to move... Agent: Irell & Manella LLP

20100149696 - Magnetic sensor including an element for generating signals related to resistance changes: A magnetic device includes first and second electrodes and a sensor stack connected to the first and second electrodes proximate a sensing surface of the magnetic sensor. A resistive element is connected to the first and second electrodes in parallel or in series with the sensor stack and adjacent the... Agent: Kinney & Lange, P.A.

20100149697 - Perpendicular magnetic recording head having a magnetic layer overhanging a trailing side of a main pole and method of manufacture thereof: A recording head having a narrowed track has a high recording magnetic field strength and a high recording magnetic field gradient has certain problems which may be difficult to overcome. In one embodiment, a magnetic film, which overhangs from a track width, is provided on a trailing side of a... Agent: Zilka-kotab, PC- Hit

  
06/10/2010 > patent applications in patent subcategories. invention type

20100142071 - Method and apparatus for tape drive data logging: Method and apparatus for logging of data within a data storage system, such as a tape drive library. The tape drive library includes a central storage (memory) providing storage space assigned to each tape drive in the tape drive library and allowing each tape drive to directly store data there,... Agent: Baker Botts L.L.P.

20100142070 - Storage system and operation method thereof: Aiming to suitably balance, when backing up data to a magnetic tape, search time and writing/reading performance depending on the purpose of the backup, provided is a disk array apparatus including a disk device having hard disks, a magnetic tape device including a magnetic tape to which data to be... Agent: Juan Carlos A. Marquez C/o Stites & Harbison PLLC

20100142074 - Head evaluating method and device, and information storage apparatus: According to one embodiment, a method evaluates a head comprising a read element, a recording element, a coil, and a heater to change a projection amount of the elements by thermal expansion. The method includes: floating the head over the medium rotated; projecting including conducting electricity through the heater with... Agent: Knobbe Martens Olson & Bear LLP

20100142073 - Method and apparatus for controlling fly-height of a perpendicular-magnetic-recording head in a hard disk drive: A method for controlling proximity of a read element of a perpendicular-magnetic-recording (PMR) head to a PMR disk. The method includes: a) writing recorded data with a write element of the PMR head to the PMR disk; b) providing a proximity-control setting to a proximity-control element; c) positioning the read... Agent: Hitachi C/o Wagner Blecher LLP

20100142072 - Methods for depositing lubricant onto disks and systems thereof: A system in one embodiment includes a disk; a reservoir having a selectively openable cover; a lubricant in the reservoir; and a sensor for detecting an event or condition that triggers opening of the cover. A method in another embodiment includes determining that a trigger event or a trigger condition... Agent: Zilka-kotab, PC- Hit

20100142075 - Data storage drive with reduced power consumption: A data storage drive comprises a storage disk, a read/write head, and signal processing circuitry in signal communication with the read/write head. The read/write head is operative to read data from and write data to the storage disk at a plurality of data transfer rates. Moreover, the signal processing circuitry... Agent: Ryan, Mason & Lewis, LLP

20100142077 - Magnetic recording/reproducing using a patterned medium: To synchronize a write/read frequency with media with high precision even when a write head is positioned in a different zone in a magnetic recording/reproducing device equipped with patterned media formed with writing hit patterns and having a zoned format function, a write head is positioned on a recording track... Agent: Zilka-kotab, PC- Hit

20100142076 - Patterned-media magnetic recording disk with cryptographically scrambled patterns and disk drive operable with the disk: Patterned-media magnetic recording disks are made from a master template that has nondata regions that contain a pattern of one or more discrete nondata islands and discrete gaps, with the pattern representing a scrambled number. All disks made from the master template, or from replica molds made from the master,... Agent: Thomas R. Berthold

20100142078 - Systems and methods for memory efficient repeatable run out processing: Various embodiments of the present invention provide systems and methods for low overhead disk wobble compensation. As an example, a method for performing synchronous wobble compensation processing is disclosed. The method includes providing a medium that includes a servo data region and a user data region. The servo data region... Agent: Hamilton,desanctis & Cha (lsi)

20100142079 - Near-field light generating element and method for forming the element: Provided is a method for forming a near-field light generating element, which is capable of sufficiently suppressing the unevenness of a waveguide surface and the distortion within the waveguide. The forming method comprises the steps of: forming a first etching stopper layer on a lower waveguide layer; forming a second... Agent: Frommer Lawrence & Haug LLP

20100142082 - Disk drive and method for head servo control of the disk drive: A disk drive. The disk drive includes a head, a moving mechanism, a first peak filter, an adaptive peak filter, and a filter controller. The head is configured to read servo data on a disk at sampling frequency. The moving mechanism is configured to move the head in proximity with... Agent: Hitachi C/o Wagner Blecher LLP

20100142081 - Magnetic disk device, actuator arm, and suspension: According to one embodiment, a magnetic disk device includes a magnetic disk, a magnetic head, and an actuator. The magnetic disk stores data. The magnetic head floats due to an air flow produced by the rotation of the magnetic disk to write and read data to and from the magnetic... Agent: Knobbe Martens Olson & Bear LLP

20100142083 - Magnetic recording medium and magnetic storage device: According to one embodiment, a magnetic recording medium includes a substrate and a single domain magnetic dot. The single domain magnetic dot is provided on the substrate and is written with a compensation signal for controlling the position of at least one of a recording device and a reproducing device.... Agent: Knobbe Martens Olson & Bear LLP

20100142080 - Methods and apparatus to detect surface characteristics on magnetic read/write heads: A method and apparatus for detecting predetermined surface characteristics in head gimbal assemblies to improve hard disk drive reliability. The predetermined surface characteristics include head slider protrusions such as scratches or contamination that can cause damage to the head or disk in hard drives. By detecting these protrusions, those drives... Agent: Patterson & Sheridan, L.L.P.

20100142084 - Magnetic medium having an artificial pattern structure using a gradient of a magnetization reversal field and a method of use thereof: To avoid the occurrence of a recording error by suppressing the influence that a magneto-static interaction acting between the pattern dots exerts on a recording process and expand a margin for recording synchronization timing lag or tracking misregistration on the pattern dot. Each pattern dot has a structure in which... Agent: Zilka-kotab, PC- Hit

20100142085 - Magnetic recording disk and disk drive with alternating single-polarity position error signal (pes) blocks for read/write head positioning: A magnetic recording disk drive has a position-error-signal (PES) servo pattern divided into at least two circumferentially adjacent fields that extend radially across the data tracks and include PES blocks that are DC magnetized in one direction, with each PES block having a magnetization opposite to the magnetization of its... Agent: Thomas R. Berthold

20100142086 - Method and apparatus for controlling the effects of seek-induced vibration of a component part in a hard-disk drive: A method for controlling the effects of seek-induced vibration of a component part in a hard-disk drive. The method includes determining a resonant frequency of seek-induced vibration of the component part and a reference amplitude of a frequency-component in a first voice-coil-motor signal (VCMS) at the resonant frequency. The method... Agent: Hitachi C/o Wagner Blecher LLP

20100142087 - Variable track width recording compensation: Method and apparatus for providing a storage medium with variable track widths. In accordance with various embodiments, a data storage medium is rotated by a motor. A write transducer is used to write concentric data tracks to the storage medium during said rotation. The tracks are provided with variable track... Agent: Fellers, Snider, Blankenship, Bailey & Tippens, PC

20100142089 - Perpendicular magnetic storage medium and storage apparatus: An underlayer includes concentric soft magnetic bodies extending along the surface of a substrate. The soft magnetic bodies are separated from one another by concentric nonmagnetic bodies and configured to have the axis of easy magnetization set parallel to the surface of the substrate. A magnetic recording film extends along... Agent: Sughrue Mion, PLLC

20100142088 - Spin torque oscillator, magnetic recording head, magnetic head assembly and magnetic recording apparatus: A spin torque oscillator includes an amorphous soft magnetic layer, a nonmagnetic layer and a hard magnetic layer. The nonmagnetic layer with a close-packed crystal structure is provided on the amorphous soft magnetic layer. The hard magnetic layer with a close-packed crystal structure and perpendicular magnetic anisotropy is provided on... Agent: Nixon & Vanderhye, PC

20100142090 - Library apparatus: A library apparatus includes: a housing, a record medium storage shelf that stores information record media having a barcode for identification; an input-output device in which the information record medium is loaded and which inputs and outputs information to and from the loaded information record medium; a robot that transfers... Agent: Staas & Halsey LLP

20100142091 - Information recording/reproducing device: An information recording/reproducing device includes a recording layer, and a recording circuit which records data to the recording layer by generating a phase change in the recording layer. The recording layer includes a first chemical compound having a spinel structure. The recording layer is AxMyX4 (0.1≦x≦2.2, 1.0≦y≦2.0), where A includes... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20100142092 - Active compensation of flying height in magnetic disk drives: Magnetic disk drives and associated methods are described for performing an active flying height compensation process for a slider of a magnetic disk drive. For the flying height compensation process, a control system in the disk drive detects a reduction in flying height of a slider in the disk drive.... Agent: Duft Bornsen & Fishman, LLP

20100142094 - Magnetic head slider and magnetic disk device: According to one embodiment, a magnetic head slider includes: a magnetic head; a slider main body configured to be provided with the magnetic head; a first protrusion portion configured to be provided on the slider main body so as to abut the magnetic head; a second protrusion portion configured to... Agent: Knobbe Martens Olson & Bear LLP

20100142093 - Storage device and method of calculating transfer amount of lubricant: c

20100142095 - Head suspension assembly interconnect for a data storage device: Interconnections for attaching a suspension assembly to an arm of an actuator or positioning device are disclosed. In illustrated embodiments, the interconnection includes one or more weld connections formed along opposed side seams of overlapping portions of the arm and head suspension assembly. In illustrated embodiments, the weld connections are... Agent: Seagate Technology LLC C/o Westman, Champlin & Kelly, P.A.

20100142096 - Integrated slider bias control: In a method of biasing a slider, a bias voltage is generated for biasing a slider. The bias voltage is integratedly coupled to a conductive body of the slider via an existing signal path of the slider such that the slider is biased with the bias voltage. The existing signal... Agent: Hitachi C/o Wagner Blecher LLP

20100142097 - Suspension substrate, suspension, head suspension and hard disk drive: It is a primary object of the present invention to provide a suspension substrate having reduced strain. The present invention solves the problem by providing a suspension substrate comprising: a fundamental structure in which a metal substrate, a first insulation layer, and a wiring are laminated in this order; a... Agent: Ladas & Parry LLP

20100142099 - Low resistance tunnel magnetoresistance (tmr) structure: A magnetic structure in one embodiment includes a tunnel barrier layer; a free layer; and a buffer layer between the tunnel barrier layer and the free layer, wherein a cross sectional area of the tunnel barrier layer in a direction parallel to a plane of deposition thereof is greater than... Agent: Zilka-kotab, PC- Hit

20100142100 - Magnetoresistive head with a cpp structure having suppressed side reading: According to one embodiment, a CPP structure magnetoresistive head includes a magnetoresistive sensor film between a lower shield layer and an upper shield layer and a longitudinal biasing layer disposed at each side of the magnetoresistive sensor film via a read track width defining insulator film. In the stripe height... Agent: Zilka-kotab, PC- Hit

20100142098 - Method for manufacturing magnetoresistance effect element using simultaneous sputtering of zn and zno: A method of manufacturing a magnetoresistive (MR) effective element having a pair of magnetic layers and a nonmagnetic intermediate layer including a ZnO film, wherein a relative angle of magnetization directions of the pair of magnetic layers varies according to an external magnetic field. The method includes a step for... Agent: Posz Law Group, PLC

20100142101 - Differential magnetoresistive effect head and magnetic recording/reading device: According to one embodiment, a differential magnetoresistive effect element comprises a first magnetoresistive effect element having a first pinning layer, a first intermediate layer, and a first free layer. The differential magnetoresistive effect element also comprises a second magnetoresistive effect element stacked via a spacer layer above the first magnetoresistive... Agent: Zilka-kotab, PC- Hit

  
06/03/2010 > patent applications in patent subcategories. invention type

20100134912 - Lubricant distribution in hard disk drives used for digital video recorders: A method for utilizing idle times during read/write operations for a personal video recorder (PVR) is described. Idle times during read/write operations are predicted and then such idle times are used to perform hard disk maintenance functions.... Agent: Robert D. Shedd, Patent Operations Thomson Licensing LLC

20100134911 - Multi-parameter optimization of write head performance using adaptive response surface: A method for optimizing design parameters of a magnetic write head. The method involves compiling a table of data points for a plurality of design parameters. An experimentally derived optimal design point is determined a first set of tests are performed at this experimentally determined design point. A three dimensional... Agent: Zilka-kotab, PC- Hit

20100134913 - Frequency control apparatus and storage device: According to one embodiment, a frequency control apparatus includes an eccentric component storage module, a frequency correction amount calculating module, and an oscillator control module. The eccentric component storage module stores in advance an eccentric component calculated by a discrete Fourier transform of the number of clock signals measured for... Agent: Greer, Burns & Crain

20100134914 - Hard disk sector/track remapping for transparent wear leveling: The present principles provide methods for storing the write counts for each track on the track or alternatively in NVRAM in the hard disk. Most hard disks already have a mechanism to remap a sector that becomes un-writable. This mechanism is used to remap entire tracks when a track write... Agent: Robert D. Shedd, Patent Operations Thomson Licensing LLC

20100134915 - Magnetic head with a heating element between the read and write element and method of manufacturing thereof: According to one embodiment, a magnetic head includes a write element, a read element, and a heating element disposed between the write element and the read element. When power is applied to the heating element, either the read element or the write element projects beyond a plane of an air-bearing... Agent: Zilka-kotab, PC- Hit

20100134916 - Magnetic recording medium and magnetic storage device: According to one embodiment, a magnetic recording medium includes a disc substrate, a first recording layer, and a second recording layer. The first recording layer is disposed in at least one of a plurality of data storage areas partitioned in a radial direction on the disc substrate. A magnetic material... Agent: Knobbe Martens Olson & Bear LLP

20100134917 - Method and apparatus for offset control in a disk drive: According to one embodiment, a disk drive capable of performing a dynamic offset control (DOC) is provided. The disk drive has an offset module and an updating module. The offset module calculates an offset value that changes during a one-rotation period of a disk, from the offset-measuring position data recorded... Agent: Knobbe Martens Olson & Bear LLP

20100134918 - Servo write method and servo write system for hard-disk drive: A servo write method for a hard-disk drive. The method includes generating, with an input of characteristics of a magnetic-recording head and a magnetic-recording disk which are incorporated into the hard-disk drive, a yield prediction model from a correlation between yields of the hard-disk drive, and characteristics of the magnetic-recording... Agent: Hitachi C/o Wagner Blecher LLP

20100134919 - Microactuator control that avoids thermal asperities on disk surfaces: While a microactuator is controlled to cause a head to follow a track on a disk surface, one or more other microactuators are separately controlled to offset other heads away from locations of thermal asperities on other associated disk surfaces.... Agent: Seagate Technology LLC C/o Murabito Hao & Barnes LLP

20100134920 - Disk drive with air-flow control component: A disk drive. The disk drive includes a motor, a base to which the motor is affixed, an actuator supporting a head-slider, and an air-flow control component affixed inside the base. The motor is configured to spin a disk. The actuator is configured to access the disk and to rotate... Agent: Hitachi C/o Wagner Blecher LLP

20100134922 - Magnetic recording head, magnetic head assembly, magnetic recording apparatus, and magnetic recording method: A magnetic recording head includes a first magnetic pole, a second magnetic pole, a spin torque oscillator, a first coil, a second coil, and a third coil. The first magnetic pole applies a recording magnetic field to a magnetic recording medium. The second magnetic pole is provided parallel to the... Agent: Nixon & Vanderhye, PC

20100134921 - Storage device: According to one embodiment, a storage device includes a coil supporting arm, an actuator, and a magnetic circuit. The coil supporting arm includes a flat coil and a coil supporting module that is coupled with the inner circumference of the flat coil to support the flat coil. The actuator holds... Agent: Greer, Burns & Crain

20100134923 - Magnetic random access memory with dual spin torque reference layers: A magnetic data storage cell, applicable to spin-torque random access memory (ST-RAM), is disclosed. A magnetic cell includes first and second fixed magnetic layers and a free magnetic layer positioned between the fixed magnetic layers. The magnetic cell also includes terminals configured for providing a spin-polarized current through the magnetic... Agent: Campbell Nelson Whipps, LLC

20100134924 - Storage device: According to one embodiment, a storage device includes at least one storage disk fixed to a hub mounted on a motor by a disk fixing mechanism, and a head configured to read and write information from and to the storage disk. The disk fixing mechanism includes a clamp ring, including... Agent: Knobbe Martens Olson & Bear LLP

20100134925 - Apparatus minimizing impedance in flex-to-printed circuit board connection through the disk base of a hard disk drive: This application discloses a hard disk drive, a head stack assembly, and a printed circuit board configured to include impedance patches on the flex ground plane, the flex power plane, the printed circuit ground plane and/or the printed circuit power plane over or under a connector site in the disk... Agent: Gregory Smith & Associates

20100134926 - Sintered body and production method thereof: i

20100134927 - Actuator stopper and storage apparatus: According to one embodiment, an actuator stopper contacts a butting portion of an actuator which moves a head in a movement direction in a movement plane, and restricts a movement range of the actuator along the movement direction. The actuator stopper includes a first portion and a second portion. The... Agent: Greer, Burns & Crain

20100134928 - Head suspension assembly and storage medium driving apparatus: According to one embodiment, a head suspension assembly includes: a head slider; a fixed piece supported on a surface of a platy gimbal; a first arm configured to extend from the fixed piece, be connected to the head slider, and include a platy first flexible portion that extends, between the... Agent: Knobbe Martens Olson & Bear LLP

20100134929 - Multi-channel thin-film magnetic head and magnetic tape drive apparatus with the multi-channel thin-film magnetic head: A multi-channel thin-film magnetic head includes a head section provided with a plurality of thin-film magnetic head elements and a sliding surface for a magnetic tape, a slot section running in a direction perpendicular to a magnetic tape transport direction, the slot section being arranged adjacent to the head section... Agent: Frommer Lawrence & Haug LLP

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