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Dynamic magnetic information storage or retrieval June invention type 06/09

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.
  
06/25/2009 > patent applications in patent subcategories. invention type

20090161242 - Magnetic disk substrate and magnetic recording medium thereof: The present invention relates to a magnetic disk substrate, in which an amplitude Wa of a waviness on a surface measured by using an interferometer for a versatile disk at a measuring wave-length of 5.0 mm is within the range of 0.1 nm to 0.5 nm, an average amplitude Wb... Agent: Sughrue Mion, PLLC

20090161244 - Method and apparatus for inspecting defects of patterns formed on a hard disk medium: According to the present invention, 100-percent inspection of products becomes possible by a method including the steps of: irradiating a surface of a hard disk medium, on which a magnetic material pattern is formed, with a light beam including a plurality of wavelengths; detecting the intensity of a reflected light... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090161243 - Monitoring disk drives to predict failure: Embodiments include methods, apparatus, and systems for monitoring disk drives to predict failure. One embodiment includes a disk drive having a plurality of different types of sensors that sense events over a lifetime of the disk drive. Data from the events is aggregated to predict when the disk drive will... Agent: Hewlett Packard Company

20090161245 - Frequency domain approach for efficient computation of fixed-point equalization targets: Various embodiments of the present invention provide systems and methods for equalizing an input signal. For example, various embodiments of the present invention provide a method for performing equalization in a storage device. Such methods include providing an equalizer circuit that is governed by a target value, and a filter... Agent: Hamilton,desanctis & Cha (lsi)

20090161246 - Random number generation using hard disk drive information: A hard disk drive enhances random number generation. In particular embodiments, the hard disk drive includes a controller, a hard disk, and a head. The head includes a read sensor for reading patterns on the hard disk. The controller generates a random number based on information associated with the position... Agent: Steven J. Cahill/ Hitachi Gst

20090161247 - Channel skew identification and notification: Embodiments of the present invention analyze a plurality of parallel channels and identify specific channel(s) that have skew outside of an acceptable skew error margin. In certain embodiments, this skew is identified by determining the timing misalignment between a channel under test and a deskew channel. Other channels within the... Agent: Infinera Corporation

20090161248 - Method and apparatus for determining disk-runout information in a disk drive: According to one embodiment, a disk drive has a disk, a CPU and a memory. The CPU measures servo intervals between the servo areas provided on the disk, and calculates changes of the servo intervals, which have resulted from a temperature change. The CPU detects a disk shift from the... Agent: Knobbe Martens Olson & Bear LLP

20090161249 - Magnetic tape, magnetic tape apparatus, servo pattern recording apparatus, magnetic tape producing method, and magnetic tape recording method: Provided is a magnetic tape that includes a data band, including servo patterns, data, and a guard space. The servo patterns is formed along a longitudinal direction of the magnetic tape with an interval provided between each of the servo patterns, each of the servo patterns formed across a full... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090161250 - Library apparatus, and insertion and ejection mechanism: A library apparatus includes a housing, an insertion and ejection mechanism that is provided in an opening formed in the housing and that is configured to insert and eject a magazine, the magazine being arranged to accommodate a cartridge that includes a storage medium, a drive mechanism configured to access... Agent: Fujitsu Patent Center C/o Cpa Global

20090161251 - Integrated windage blocker for reduction of flex cable vibration in a disk drive: A windage blocker integrated with a base for a hard disk drive is disclosed. One embodiment provides a cavity portion comprising a planar surface defining an inner bottom surface of the cavity, the cavity portion for receiving an actuator assembly, the actuator assembly comprising a flex cable. The cavity includes... Agent: Hitachi C/o Wagner Blecher LLP

20090161253 - Bearing mechanism, motor and storage disk drive apparatus: A bearing mechanism includes a cylindrical bottom-closed sleeve unit; a shaft unit radially supported by the sleeve unit via a lubricant; and an elastic thrust plate on an inner bottom surface of the sleeve unit to contact an end portion of the shaft unit at a position on a central... Agent: Volentine & Whitt PLLC

20090161252 - Disk drive device: The present invention provides a disk drive device that can appropriately clamp a disk by means of magnetic force even when the disk drive device is very small. A clamping magnet 16 on which a disk 20 is mounted is attached to a turntable portion 15b of a rotor frame... Agent: Steptoe & Johnson LLP

20090161254 - Magnetic recording medium, production method thereof and magnetic disc apparatus: A magnetic recording medium for use in digital magnetic recording, which comprises a nonmagnetic substrate having deposited thereon a magnetic layer, wherein with respect to the in-plane direction, the magnetic recording layer comprises a plurality of ferromagnetic regions separated from each other by an antiferromagnetic region. A production method of... Agent: Greer, Burns & Crain

20090161255 - Perpendicular magnetic recording medium and magnetic recording/reproduction apparatus using the same: According to one embodiment, a perpendicular magnetic recording medium includes a substrate, soft magnetic underlying layer, nonmagnetic underlying layer, and perpendicular magnetic recording layer. The perpendicular magnetic recording layer has an array of magnetic structures each corresponding to 1 bit of recording information, and includes a crystalline hard magnetic recording... Agent: Knobbe Martens Olson & Bear LLP

20090161256 - Multiple writing process for magnetic bit-patterned media: Two pass writing system and method for patterned media. In a first step, a write head of a hard disk drive writes with a strong write field. In a second step, a write head of the hard disk drive writes with a weak field. In this manner, magnetic islands of... Agent: Hitachi Global Storage Technologies, Inc.

20090161257 - Magnetic recording medium, method of manufacturing the same, and magnetic recording apparatus: According to one embodiment, a magnetic recording medium includes protruded magnetic patterns formed on a substrate, and a non-magnetic material filled in recesses between the magnetic patterns and made of a multi-element amorphous alloy containing Ni or Cu, and two or more metals selected from the group consisting of Ta,... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20090161258 - Storage device and assembly method for the same: A storage device includes a storage medium; a rotating shaft; a head actuator pivotally supported about the rotating shaft; a head fixed at an end of the head actuator for reading/writing information from/to the storage medium; and a magnetic circuit having a magnetic member and a magnet connected thereto. The... Agent: Greer, Burns & Crain

20090161259 - Asymmetric load beam for improving resonance performance of hard disk drive suspension: A structure for a load beam used in hard disk drive devices includes an asymmetric structure. The load beam exhibits longitudinal asymmetry (i.e., is asymmetric along its long axis) in regard to the weight distribution, but has a center of mass that lies along its longitudinal axis due to the... Agent: Intellectual Property Law Office Of Joel Voelzke

20090161260 - Storage apparatus and retraction mechanism for head actuator thereof: A retraction mechanism for a head actuator having a head at the end thereof includes a metal piece that is attached to a coil arm, a stopper, and a magnet. The metal piece is configured to be attracted to the stopper with a magnetic force exerted by the magnet to... Agent: Fujitsu Patent Center C/o Cpa Global

20090161261 - Magnetic sensor: A magnetic sensor having at least a first and at least a second structure of soft-magnetic material that are spatially separated and define a first gap therebetween. The first and second structure of soft-magnetic material are adapted to form a gap magnetic field pointing in a direction substantially perpendicular to... Agent: Zilka-kotab, PC- Ibm

20090161262 - Three terminal magnetic sensing device having a track width defined in a localized region by a patterned insulator and methods of making the same: A three terminal magnetic sensing device (TTM) having a trackwidth defined in a localized region by a patterned insulator, and methods of making the same, are disclosed. In one illustrative example, one or more first sensor layers (e.g. which includes a “base” layer) are formed over a collector substrate. A... Agent: John J. Oskorep, Esq. LLC One Magnificent Mile Center

20090161263 - Magnetic head and magnetic disk apparatus: Embodiments of the present invention provide a magnetic head for perpendicular magnetic recording, and a magnetic disk apparatus capable of preventing data erasure caused by alignment marks. In an embodiment, the magnetic head includes a head element including at least a main pole having a pole face on a flying... Agent: Townsend And Townsend And Crew LLP

20090161264 - Magnetic field sensitive sensor: The present invention relates to a sensor, preferably for magnetic rotary or linear sensor systems which include a scale arranged at a given distance from the sensor, with at least one magnetic field-sensitive GMR sensor element which is arranged in a housing, wherein the housing additionally includes one magnetic field... Agent: Alleman Hall Mccoy Russell & Tuttle LLP

20090161265 - Magnetic sensor, magnetic head, and magnetic memory by using spin hall devices: A magnetic sensor reduces thermal fluctuation and realizes high-sensitive signal detection using a spin Hall device of a simple structure configured with only one magnetic layer. The magnetic sensor includes a stacked film in which a nonmagnetic spin Hall layer, a nonmagnetic insulator layer, and a magnetic layer are stacked,... Agent: Stanley P. Fisher Reed Smith LLP

20090161266 - Tmr device with surfactant layer on top of cofexby/cofez inner pinned layer: A high performance TMR element is fabricated by inserting an oxygen surfactant layer (OSL) between a pinned layer and AlOx tunnel barrier layer in a bottom spin valve configuration. The pinned layer preferably has a SyAP configuration with an outer pinned layer, a Ru coupling layer, and an inner pinned... Agent: Saile Ackerman LLC

20090161268 - Current-perpendicular-to-plane read sensor with amorphous ferromagnetic and polycrystalline nonmagnetic seed layers: A method, apparatus, and article of manufacture for a current-perpendicular-to-plane (CPP) giant magnetoresistance (GMR) or a tunneling magnetoresistance (TMR) read sensor is proposed. The CPP read sensor comprises an amorphous ferromagnetic first seed layer, a polycrystalline nonmagnetic second seed layer, a nonmagnetic first cap layer, a nonmagnetic second cap layer,... Agent: Patterson & Sheridan, L.L.P.

20090161269 - Magnetoresistive sensor having an enhanced free layer stabilization mechanism: A magnetoresistive sensor having an improved hard bias stabilization structure. The sensor includes a hard bias layer that is formed on a surface that has been treated to form it with an anisotropic texture that induces a magnetic anisotropy oriented parallel with the air bearing surface. This magnetic anisotropy is... Agent: Zilka-kotab, PC- Hit

20090161267 - Ferromagnetic tunnel junction device, magnetic head, and magnetic storage device: According to an aspect of an embodiment, a ferromagnetic tunnel junction device includes: a first pinned magnetic member including a ferromagnetic material having a boron atom; a second pinned magnetic member including a ferromagnetic material on the first pinned magnetic member, the content of the boron atom in the second... Agent: Fujitsu Patent Center C/o Cpa Global

  
06/18/2009 > patent applications in patent subcategories. invention type

20090153990 - Device for embedding information into data: An object of the present invention is to embed information while making effective use of a recording area at the time of recording data. To this end, a controller in a tape drive includes: a storage unit which stores information desired to be embedded; an acquisition unit which acquires the... Agent: Konrad Raynes & Victor, LLP. Attn: Ibm37

20090153991 - Methods and apparatus to provide dynamically-biased write drivers for hard disk drive (hdd) application: Methods and apparatus to provide dynamically biased write drivers for hard disk drive applications are described. According to one example, a hard disk drive write system includes a drive signal generator to receive data to be written to a hard disk drive platter and to generate drive signals including a... Agent: Texas Instruments Incorporated

20090153992 - Disk drive testing: A disk drive testing system includes at least one robotic arm defining a first axis substantially normal to a floor surface. The robotic arm is operable to rotate through a predetermined arc about and extend radially from the first axis. Multiple racks are arranged around the robotic arm for servicing... Agent: Fish & Richardson PC

20090153993 - Disk drive testing: A disk drive testing system includes at least one robotic arm defining a first axis substantially normal to a floor surface. The robotic arm is operable to rotate through a predetermined arc about and extend radially from the first axis. Multiple racks are arranged around the robotic arm for servicing... Agent: Fish & Richardson PC

20090153994 - Disk drive transport, clamping and testing: A disk drive transporter, for transporting a disk drive and for mounting a disk drive within a test slot, includes a frame configured to receive and support a disk drive. The frame includes sidewalls configured to receive a disk drive therebetween and sized to be inserted into a test slot... Agent: Fish & Richardson P.C.

20090153997 - Method operating hard disk drive on the basis of predicted defect using hierarchical clustering and curve fit: A method of operating a hard disk drive (HDD) on the basis of a predicted new defect in a disk associated with the HDD is disclosed. The method includes detecting defects in a magnetic surface of the disk, defining a plurality of clusters by grouping the detected defects using a... Agent: Volentine & Whitt PLLC

20090153995 - Temperature coefficient of resistance measurement of tmr head using flying height control heater and determine maximum bias voltage of tmr heads: A method for determining whether a magneto-resistive head of a hard disk drive is defective for having an undesirable break down voltage. The method includes applying a voltage to a heater element of a magneto-resistive head and measuring a write element resistance and a read element resistance. A temperature coefficient... Agent: Irell & Manella LLP

20090153996 - Using servo data harmonics to monitor head-medium spacing: A method is disclosed that includes measuring a first amplitude and a second amplitude in a servo pattern signal derived from a transducer head interacting with a medium; and providing an indication of a change in a spacing distance between the head and the medium, wherein the change in the... Agent: Westman Champlin & Kelly, P.A.

20090153998 - Storage medium reproducing apparatus and storage medium reproducing method: A storage medium reproducing apparatus includes a storage medium that records data; a reproducing head that reads the data recorded in the storage medium; a positioning controlling unit that performs positioning control of the reproducing head with respect to tracks based on servo signals from the servo area included in... Agent: Amin, Turocy & Calvin, LLP

20090154001 - Dynamic system control method: Techniques are provided herein for reducing vibrations in various modes of a dynamic system. One such technique comprises incorporating vibration limiting and sensitivity constraints into a partial fraction expansion equation model of the system so as to reduce vibrations to specific levels. Another technique comprises shaping a command determined using... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090153999 - Hard disk, control unit for a disk device, and method for controlling a disk device: A hard disk includes: a plurality of servo areas which are elongated radially from a center of the hard disk to an outward thereof over tracks thereof; and a plurality of data areas which are respectively provided between the plurality of servo areas; wherein alternative operation is conducted per servo... Agent: Knobbe Martens Olson & Bear LLP

20090154000 - Method and apparatus for writing data with sequential access in a disk drive: According to one embodiment, a disk drive has a disk, a controller, and a flash memory, the request data to be recorded in the disk may be continuous data. In this case, the first one-track data item including the head address of the requested data is stored in the flash... Agent: Knobbe Martens Olson & Bear LLP

20090154002 - Methods and apparatus to control head expansion in multi-head hard-disk drives: Methods and apparatus to control head expansion in multi-head hard-disk drives are disclosed. An example control system for use in a multi-head hard-disk drive includes a first sensor to provide a first feedback signal indicating a status of a first head; a second sensor to provide a second feedback signal... Agent: Texas Instruments Incorporated

20090154003 - Systems and methods for using an on-the-fly cbd estimate to adjust fly-height: Various embodiments of the present invention provide systems and methods for using channel bit density estimates to adjust fly-height. For example, various embodiments of the present invention provide methods for adaptively adjusting fly-height. Such methods include providing a storage medium that includes information corresponding to a process data set, and... Agent: Hamilton,desanctis & Cha (lsi)

20090154004 - Servo architecture for high areal density data storage: A track accessing mechanism includes a track accessing arm actuable by a primary actuation device for accessing concentric data tracks on a storage medium and at least one slider attached to the track accessing arm. The at least one slider includes a servo head configured to read positional information from... Agent: Seagate Technology LLC C/o Westman Champlin & Kelly, P.A.

20090154005 - System and method for identifying the signal integrity of a signal from a tape drive: A system and method for identifying signal degradation in a tape drive is disclosed in which a data signal read from the tape drive and the signal characteristics of the undecoded portion of the data stream are compared with a set of known values. The undecoded portion of the data... Agent: Baker Botts, LLP

20090154006 - Removable hard disk device: A removable hard disk device includes a handle, a first holder, a hard disk drive located between the handle and the first holder, and two second holders pivotally connected to the handle and detachably connected to the first holder and the hard disk drive respectively for firmly holding the hard... Agent: Browdy And Neimark, P.l.l.c. 624 Ninth Street, Nw

20090154007 - Altitude sensing systems for flying height adjustment: An altitude sensor includes a support frame and a sensor unit mounted in the support frame. The support frame has an upper shield and a lower shield. The sensor unit includes a beam and a damper. The damper is configured to move up and down in response to the air... Agent: Nixon & Vanderhye, PC

20090154008 - Spindle motor and recording disk drive having spindle motor: Using a simple and inexpensive method, a reliable spindle motor having a simple and inexpensive structure is afforded, in which contact failure of the FPC does not occur even when the motor undergoes external impact. An extending portion is provided radially outer side of an annular recess of a base.... Agent: Volentine & Whitt PLLC

20090154010 - Magnetic disk and magnetic disk unit: i

20090154009 - Methods for fabricating perpendicular recording heads with controlled separation regions: Methods of recording head fabrication are provided to fabricate a region of separation material between a write pole and a shield of a write head that forms a controlled spacing between the write pole and the shield of the write head. The method comprises forming a mask structure having an... Agent: Duft Bornsen & Fishman, LLP

20090154011 - Magnetic write head having helical coil with a fin structure for reduced heat induced protrusion: A magnetic write head having a write coil configured to dissipate heat away from the write head to minimize thermal protrusion. The write coil is formed as a helical coil having upper and lower leads that are connected by electrically conductive studs formed therebetween. The first and leads extend beyond... Agent: Zilka-kotab, PC- Hit

20090154012 - Perpendicular magnetic recording head, magnetic head, and magnetic disk device mounted with these heads: Embodiments of the invention reduce generation of a magnetic field with a polarity reverse to that of the recording magnetic field, without deteriorating a gradient in the magnetic field. An embodiment of a magnetic disk device according to the present invention suppresses deviation and erase of already recorded data. In... Agent: Townsend And Townsend And Crew LLP

20090154014 - Thin film magnetic head and manufacturing method thereof: Embodiments of the present invention improve the recording density of a magnetic disk drives by providing a write head capable of writing adequately on a narrow trackwidth and high coercivity recording media. According to one embodiment, a thin film magnetic head has a write head which comprises at least a... Agent: Townsend And Townsend And Crew LLP

20090154015 - Magnetic write pole fabrication: Write elements and methods of fabricating magnetic write poles are described. For one method, a vertical mask structure is formed on a magnetic layer in locations of a pole tip and a yoke of a write pole. The vertical mask structure may be formed by coating vertical surfaces of resists... Agent: Duft Bornsen & Fishman, LLP

20090154013 - Perpendicular magnetic recording head and method of manufacturing the same: Embodiments of the present invention provide a perpendicular magnetic recording head which can suppress reduction in recording field and efficiently reduce a fringe field. According to one embodiment, a side shield disposed at a side of each side face in a cross track direction of a main pole is arranged... Agent: Townsend And Townsend And Crew LLP

20090154016 - Computer storage drive with user selectable mode of identification: A computer drive bay that accepts hard drive cartridges and has the ability for the user to select between identifying itself to the host computer as either a-removable media device or as a fixed disc to improve data backup operations.... Agent: Marc Lalouette

20090154017 - System, method and apparatus for patterned media with reduced magnetic trench material: A bit patterned magnetic media design for reducing the amount of magnetic material located in the trenches between topographic features is disclosed. An intermediate non-magnetic layer is deposited on the topography prior to depositing the functional magnetic layer on the topographic substrate features. The non-magnetic layer increases the width of... Agent: Bracewell & Giuliani LLP

20090154018 - Shrouding a data storage disc with disc facing surfaces that define protuberant features: Shrouding a disc to attenuate excitation energy of windage created by rotating the disc, with a shroud defining an edge-wise gap between the shroud and the disc, and the shroud further defining surface-wise gaps between the shroud and opposing disc surfaces, wherein the surface-wise gaps are characterized by opposing parallel... Agent: Mccarthy Law Group

20090154020 - Method of manufacturing magnetic head slider: A method of manufacturing a highly reliable magnetic head slider, with a simplified manufacturing process which provides reduction in manufacturing time and costs, is provided. The manufacturing method includes a multi-layer forming step for forming a magnetic head section in a multi-layered manner, the magnetic head section including a read... Agent: Nixon & Vanderhye, PC

20090154021 - Perpendicular magnetic recording head: Embodiments of the present invention provide a magnetic head that can stably supply a perpendicular magnetic field component while generating high recording field strength from a main pole. According to one embodiment, a magnetic body is deposited in a trailing side of a pole tip of a main pole via... Agent: Townsend And Townsend And Crew LLP

20090154019 - Perpendicular magnetic recording write head with slanted magnetic write pole: A perpendicular magnetic recording write head is formed on the trailing surface of a head carrier or slider that has an air-bearing surface (ABS) oriented generally parallel to the surface of the disk during operation of the disk drive. The write head has a slanted ferromagnetic write pole (WP) that... Agent: Thomas R. Berthold

20090154022 - Disk drive suspension: A disk drive suspension is provided with a load beam and a flexure including a tongue portion on which a slider is mounted. A pair of bent edge portions are formed by bending regions which extend along opposite side edges of the load beam in a thickness direction. A pair... Agent: Frishauf, Holtz, Goodman & Chick, P.C.

20090154023 - Electromagnetic damping locking apparatus for the disk drive unit: An electromagnetic damping apparatus for locking an actuator for a head stack assembly including at least one read/write head thereon is provided. In certain example embodiments, the electromagnetic damping apparatus may comprise a magnetic element and a metal element that cooperate in response to an electromagnetic field created by a... Agent: Nixon & Vanderhye, PC

20090154024 - Thin-film magnetic head with through holes reaching medium-opposed surface: Provided is a thin-film magnetic head for reading data from a magnetic recording medium and/or writing data to a magnetic recording medium, in which the magnetic spacing can be controlled appropriately by stably adjusting the pressure working between the thin-film magnetic head and the magnetic recording medium according to the... Agent: Oliff & Berridge, PLC

20090154025 - Scissoring-type current-perpendicular-to-the-plane (cpp) magnetoresistive sensor with free layers having etch-induced uniaxial magnetic anisotropy: A “scissoring-type” current-perpendicular-to-the-plane (CPP) magnetoresistive sensor with dual ferromagnetic sensing or free layers separated by a nonmagnetic spacer layer has improved stability as a result of etch-induced uniaxial magnetic anisotropy in each of the free layers. Each of the two ferromagnetic free layers has an etch-induced uniaxial magnetic anisotropy and... Agent: Thomas R. Berthold

20090154027 - Ap free layer cpp sensor with top aperture: Read sensors and associated methods of fabrication are disclosed. A read sensor as disclosed herein includes a first shield, a sensor stack including an antiparallel (AP) free layer, and insulating material disposed on the sensor stack. A aperture is formed through the insulating material above the sensor stack so that... Agent: Duft Bornsen & Fishman, LLP

20090154028 - Grounding structure of tmr and gmr heads with a flying on-demand heater: A head for a hard disk drive. The head includes a substrate, a write element, a read element and a heater element. The head also includes a buffer layer between the read element and the substrate, and a first resistor connected to the heater element and the buffer layer. The... Agent: Irell & Manella LLP

20090154030 - Magnetic head and magnetic recording apparatus: Embodiments of the present invention provide an accumulation element with high resolving power and high output suitable for magnetic recording and reproducing at high recording density. According to one embodiment, a plurality of spin injection parts and are provided to increase the total amount of spin electrons. The spin accumulation... Agent: Townsend And Townsend And Crew LLP

20090154029 - Magnetic head and magnetic recording system: A magnetic reproduction head includes a lower magnetic shield layer, an upper magnetic shield layer, a magnetoresistive film formed between the lower and the upper magnetic shield layers, a refill film in an element height direction disposed in contact with a surface opposite a floating surface of the magnetoresistive film,... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090154026 - Method for manufacturing a perpendicular magnetic write head with a thin wrap around magnetic shield: A magnetic write head for perpendicular magnetic recording having a thin wrap-around magnetic shield. The small thickness and forming method of the thin wrap-around magnetic shield allow it to be electroplated using a thin photoresist frame mask. The thin photoresist frame mask has better critical dimension and straight wall control... Agent: Zilka-kotab, PC- Hit

20090154031 - Diode shunting for electrostatic discharge protection in a hard disk drive magnetic head: The present invention provides a electrostatic discharge protection device for protecting giant magnetoresistive devices in hard disk drive from being damaged by transient current generated as a result of electrostatic discharge. Embodiments of the invention include pair of surface mount diodes that are connected back-to-back and connected to the shunting... Agent: Hitachi C/o Wagner Blecher LLP

20090154032 - Magnetoresistive sensor with nitrogenated hard bias layer for improved coercivity: A magnetoresistive sensor having a hard bias structure that provides improved bias field robustness. The sensor includes a nitrogenated hard bias layer and a seed layer that include a nitrogenated NiTa layer and a layer of Ru. The seed layer can also include a layer of CrMn disposed between the... Agent: Zilka-kotab, PC- Hit

  
06/11/2009 > patent applications in patent subcategories. invention type

20090147390 - Detecting head/disk contact using timing jitter: A disk drive that includes a head and a disk. The disk drive also includes a circuit that can detect head/disk contact from a jitter determined from a read signal provided by the head. The jitter may correspond to the time interval between two detected sync marks. Alternatively, the jitter... Agent: Irell & Manella LLP

20090147389 - Read sensor testing using thermal magnetic fluctuation noise spectra: A read head is tested by measuring the thermal magnetic fluctuation noise spectrum. A non-uniformity in the magnetic field of the free layer is produced and the thermal magnetic fluctuation noise spectrum is measured, with and/or without an external magnetic field applied. A peak in the thermal magnetic fluctuation noise... Agent: Silicon Valley Patent Group LLP

20090147391 - Information storage apparatus, information storage arrangement and information storage arrangement kit: An arrangement of an information storage apparatus is provided. The arrangement includes a first circuit board, a base, a control circuit board, and first and second connectors. The first circuit board includes circuitry for storing information written to or read from an information storage apparatus. The base has a first... Agent: Fujitsu Patent Center C/o Cpa Global

20090147392 - Magnetic element with thermally-assisted writing: This magnetic element with thermally-assisted writing using a field or spin transfer comprises a magnetic reference layer referred to as the “trapped layer”, the magnetisation of which is in a fixed direction; a magnetic storage layer called the “free layer” having a variable magnetisation direction and consisting of a layer... Agent: Burr & Brown

20090147394 - Management of data cartridges in multiple-cartridge cells in an automated data storage library: In an automated library, data cartridges, such as magnetic tape cartridges, are stored in storage cells and accessed by data storage drives. An accessor with a gripper transports cartridges between storage cells and storage drives. Cartridges are prioritized according to their relative importance. A processor manages the placement of the... Agent: Law Firm Of Dan Shifrin

20090147393 - Storage apparatus with power usage control function and power usage control method in storage apparatus: A storage apparatus includes plural trays each incorporating plural HDDs and a controller that controls access to the HDDs in response to an access request from a host apparatus. The controller also includes a table, in which standard power and a start-up power supply status are associated with each other... Agent: Brundidge & Stanger, P.C.

20090147396 - Servo writer with retract capacitor for generating a vcm driving current during a power failure: A servo writer is disclosed for writing servo data onto a disk of a disk drive. The servo writer comprises a push-pin operable to contact an actuator arm of the disk drive, an actuator for actuating the push pin, and a retract capacitor. The retract capacitor is charged, and the... Agent: Western Digital Technologies, Inc. Attn: Lesley Ning

20090147395 - Tape head layout: A tape head assembly for writing data to and reading data from a tape includes a tape head member having an engagement surface that is configured to engage the tape as the tape moves past the tape head member. A plurality of arrays of interactive elements are supported on the... Agent: Brooks Kushman P.C. / Sun / Stk

20090147397 - Patterned magnetic recording medium and method of recording track information onto the same: Provided are a patterned magnetic recording medium and a method of recording track information onto the patterned magnetic recording medium. The patterned magnetic recording medium includes: a data sector comprising a plurality of magnetic recording regions which are spaced apart from one another, wherein the magnetic recording regions constitute a... Agent: Sughrue Mion, PLLC

20090147398 - Accessor and rails for a data storage library: Data storage libraries as disclosed that provide for accessors that turn upon angled rails. In the library, a first rail and a second rail form an angle. The first and second rail each have a drive surface, but the drive surfaces are on different vertical planes. A switching mechanism of... Agent: International Business Machines Corporation

20090147399 - Magnetic media formatted with an integrated thin film subgap subpole structure for arbitrary gap pattern magnetic recording head: t

20090147400 - Magnetic head for perpendicular magnetic recording: A magnetic head comprises a pole layer, a shield layer, a gap layer disposed between the pole layer and the shield layer, and a coil. The shield layer incorporates: a first layer disposed on the gap layer; a second layer disposed on the first layer; and a third layer disposed... Agent: Oliff & Berridge, PLC

20090147401 - Magnetic recording medium, method of manufacturing the same, and magnetic recording/reproducing apparatus: The present invention provides a magnetic recording medium capable of recording or reproducing high-density information by reducing the grain size of a perpendicular magnetic recording layer and improving vertical orientation, a method of manufacturing the same, and a magnetic recording/reproducing apparatus. The perpendicular magnetic recording medium includes: a non-magnetic substrate;... Agent: Sughrue Mion, PLLC

20090147402 - Patterned magnetic recording medium and method of self servo writing onto the same: Provided are a patterned magnetic recording medium and a method of self servo writing in which servo information is written on the patterned magnetic recording medium. The patterned magnetic recording medium includes: a data sector including a plurality of magnetic recording regions spaced apart from one another, wherein the magnetic... Agent: Sughrue Mion, PLLC

20090147403 - Perpendicular magnetic recording medium and magnetic recording system: Embodiments in accordance with the present invention provide a perpendicular magnetic recording medium where the signal to noise (S/N) of the media is improved. In a particular embodiment, a magnetic layer is applied to the recording magnetic layer of the recording medium in which the normalization crystal grain cluster size... Agent: Townsend And Townsend And Crew LLP

20090147404 - Magnetic performance of a magnetic transducer operating within a hard disk drive: A method for improving the magnetic performance of at least one magnetic transducer operating within a hard disk drive. The method comprises flying the magnetic transducer at a distance of separation from a magnetic recording media. The magnetic transducer is coupled with a highly damped air bearing surface and a... Agent: Hitachi C/o Wagner Blecher LLP

20090147405 - Method for manufacturing magnetic recording medium, magnetic recording medium manufactured by the same, and magnetic recording apparatus incorporating the magnetic recording medium: A method for manufacturing a magnetic recording medium which has a substrate and a magnetic layer formed on the substrate, the method including: forming the magnetic layer over a convexo-concave pattern provided on a surface of a mold, and releasing the mold from the magnetic layer formed on the substrate.... Agent: Greer, Burns & Crain

20090147406 - Magnetic disk device and head stack assembly: Embodiments of the present invention relate disk drives, and in particular to realizing a positioning accuracy equal to that of an actuator having the mountable maximum number of suspensions, in an actuator having the smaller number of suspensions than the mountable maximum number. An embodiment of a magnetic disk device... Agent: Townsend And Townsend And Crew LLP

20090147407 - Integrated flexure tongue micro-actuator: An integrated flexure tongue micro-actuator is disclosed. One embodiment provides a first arm on a first side of the flexure tongue, the first arm approximately perpendicular with the flexure tongue. In addition, a second arm is provided on a second side of the flexure tongue, the second arm approximately parallel... Agent: Hitachi C/o Wagner Blecher LLP

20090147408 - Head ic, read circuit, media storage device and amplifier gain adjustment method for head ic: A head IC adjusts an amplitude level of a read signal of a head and outputs the adjusted signal to a read channel having an AGC amplifier. A head IC includes: a differential amplifier; an AGC circuit; external gain setting sections; and a switch. The AGC amplifier is disposed in... Agent: Greer, Burns & Crain

20090147409 - Magnetoresistive element, magnetic sensor, and method of producing the magnetoresistive element: The thickness of an antiferromagnetic layer (IrMn) and the thickness of a nonmagnetic interlayer (Cu) are adjusted so as to be within the area surrounded by boundaries a to f on the graph of FIG. 6 in which the horizontal axis represents the IrMn film thickness and the vertical axis... Agent: Brinks Hofer Gilson & Lione

20090147410 - Perpendicular magnetic recording write head with magnetic shields separated by nonmagnetic layers: A perpendicular magnetic recording write head that may be used in magnetic recording disk drives has a magnetic write pole (WP) with an end that is generally the same width as the width of the data tracks on the disk. A trailing shield (TS) is spaced from the WP in... Agent: Thomas R. Berthold

  
06/04/2009 > patent applications in patent subcategories. invention type

20090141382 - Magnetic transfer master disk and method for manufacturing the same: A magnetic transfer master disk including a magnetic layer and exhibiting excellent shape stability of a protrusion/recess pattern is provided. An initial layer formed of a conductive film is formed on a surface of a master on which a pattern of minute protrusions/recesses is formed, and then a magnetic layer... Agent: Young & Thompson

20090141383 - Setting method of magnetic disk apparatus and magnetic disk setting apparatus: A gain setting apparatus that externally performs setting of a magnetic disk apparatus before shipment causes a servo data gain setting unit to set a servo data gain for a preamplifier. The gain setting apparatus then causes a core deviation correction processor to set the servo data gain as a... Agent: Fujitsu Patent Center C/o Cpa Global

20090141384 - Inspection method for perpendicular magnetic recording medium and inspection device thereof: A device inspects the performance of a perpendicular magnetic recording medium by separating the medium noise component of a perpendicular magnetic recording medium to decrease the error rate by accurately separating and detecting the medium noise component. Using correlation matrices, jitter noise and T50 noise which depend on the transition... Agent: Greer, Burns & Crain

20090141385 - Memory device for storing data and reading data: According to an aspect of an embodiment, a memory device has a medium including a plurality of tracks, each of which has a plurality of sectors separated by a plurality of servo areas, for storing data in the sectors of the tracks, a head for writing data into and reading... Agent: Greer, Burns & Crain

20090141386 - Head ic, read circuit and media storage device: A head IC adjusts an amplitude level of a read signal of a head and outputs to a read channel having an AGC amplifier, includes an AGC amplifier. The AGC amplifier has a feedback loop control type first amplifier and a feed-forward control type second amplifier. The precision of control... Agent: Greer, Burns & Crain

20090141387 - Nanoprobe-based heating apparatus and heat-assisted magnetic recording head using the same: A nanoprobe-based heating apparatus includes a nanoprobe, a heating unit, a gap control unit, and a support unit. The nanoprobe has a tip forming at an end of the nanoprobe, and the tip applies heat to a magnetic recording bit of a recording medium. The heating unit heats the nanoprobe.... Agent: Rabin & Berdo, PC

20090141388 - Magnetic disk apparatus: A preamplifier receives a servo gate signal indicating whether magnetic information read out from a disk by a head is servo data for positioning-use or user data stored in a user area available for reading and writing of given data. In the preamplifier, a servo data gain and a user... Agent: Fujitsu Patent Center C/o Cpa Global

20090141389 - Ultra high track density adaptive head core track pitch control: Apparatuses and methods for adjusting the track pitches of the tracks on a data storage tape. In one variation, the method comprises adjusting the observed pitch between the tracks by applying variable amounts of pressure on the surface of the tape. In another variation, the pressure is applied to a... Agent: Morrison & Foerster LLP

20090141391 - Disk drive device and clearance control method thereof: Embodiments of the present invention help to precisely control the clearance between a head and disk for the pressure without using a barometric sensor. In an embodiment of the present invention, an HDD determines a clearance from variations in operational parameters, and further determines a variation in pressure by deducting... Agent: Townsend And Townsend And Crew LLP

20090141390 - Magnetic disk apparatus and magnetic disk apparatus control method: A magnetic disk apparatus has a heater for heating a head incorporated in the magnetic disk apparatus, an atmospheric pressure detector for detecting a change in atmospheric pressure in the magnetic disk apparatus, and an adjuster for adjusting a thermal dose supplied to the head by the heater according to... Agent: Staas & Halsey LLP

20090141392 - Measurement method of magnetic disk apparatus, and magnetic disk apparatus: A gain controller changes a gain of a read amplifier depending on whether a head reads out servo data or user data. Further, a heater setting unit changes the temperature of a heater and a reading gain when detecting touchdown performed by the head. Accordingly, a dynamic range of AGC... Agent: Fujitsu Patent Center C/o Cpa Global

20090141393 - Dual sided tape storage device and dual sided tape drive: A data storage device is provided with a housing having an access opening, a pair of tape reels and dual sided data tape. The access opening is adjacent to a tape path for access of each tape side. A tape drive is provided with a pair of read/write heads, each... Agent: Brooks Kushman P.C. / Sun / Stk

20090141394 - Actuator heat sink: An actuator for selectively positioning a portion of a communication channel formed by a cable circuit having a protuberant component connected at a proximal end to a flexible base, whereby the actuator defines a heat transfer surface operably disposed in thermal conductivity with a distal surface of the protuberant component... Agent: Mccarthy Law Group

20090141395 - Mounting method for storage medium: In one example embodiment, there is provided a storage-medium mounting method that includes detecting a rotation center axis of a rotor by rotating the rotor relative to a stator, the rotor being rotatably supported by the stator. The storage-medium mounting method includes mounting a storage medium on the rotor while... Agent: Fujitsu Patent Center C/o Cpa Global

20090141396 - Electric field effect read/write head, method of manufacturing the same, and electric field effect storage apparatus having the same: An electric field effect read/write head for recording/reproducing information on/from a ferroelectric recording medium using an electric field effect includes a semiconductor substrate, a recess portion formed in an upper surface of the semiconductor substrate facing the ferroelectric recording medium, and a recording/reproduction portion provided in the recess portion.... Agent: Sughrue Mion, PLLC

20090141397 - Perpendicular magnetic write head with stepped write pole for reduced mcw dependency on skew angle: A magnetic write head for perpendicular magnetic data recording having a notched write pole for reduced magnetic core width (MCW) dependence on skew. The write pole is configured with a notch that can extend to or slightly beyond the flare point of the write pole, and is formed on the... Agent: Zilka-kotab, PC- Hit

20090141398 - Magnetic head and storage apparatus: A magnetic head has a magnetic main pole and a coil for generating a magnetic flux at the magnetic main pole by energizing the coil. The magnetic main pole is formed as a multi layer structure including at least one magnetic layer and at least one FeRh alloy layer.... Agent: Fujitsu Patent Center C/o Cpa Global

20090141399 - Magnetic recording medium, method for producing thereof, and magnetic recording and reproducing apparatus: A magnetic-recording medium which is provided on a nonmagnetic substrate with at least an orientation-controlling layer for controlling the orientation of a layer formed directly thereon, a perpendicularly magnetic layer having an easily magnetizing axis oriented mainly perpendicularly relative to the nonmagnetic substrate, and a protective layer. The perpendicularly magnetic... Agent: Sughrue Mion, PLLC

20090141400 - Magnetic disk drive and control method thereof: Embodiments of the present invention provide a magnetic disk drive capable of suppressing variations in flying height of a magnetic head caused by decrease in the amount of a low density gas inside a housing and a control method therefore. According to one embodiment, the magnetic disk drive includes a... Agent: Townsend And Townsend And Crew LLP

20090141401 - Electrical connection between a suspension flexure cable and a head stack assembly flexible circuit: A method and apparatus for electrically coupling a slider to a controller circuit are disclosed. In one embodiment, a pre-amplifier with an integrated electrical connector (I-connector) may be connected via an electrical trace to a slider and via a head stack assembly flexible circuit to a control circuit. The pre-amplifier... Agent: Kenyon & Kenyon LLP

20090141402 - Head, head suspension assembly, and disk device provided with the same: According to one embodiment, a slider of a magnetic head is provided with a negative-pressure cavity formed in a facing surface, a leading step portion situated on the upstream side of the negative-pressure cavity, a pair of side portions opposed to each other, a trailing step portion situated on the... Agent: Knobbe Martens Olson & Bear LLP

20090141403 - Head with an air bearing surface having left and right leading pressurizing steps, each with short and long regions: A head has an air bearing surface with left and right leading pressurizing steps. The left and right leading pressurizing steps are each partially surrounded by left and right leading pads, respectively. The left leading pressurizing step includes a left short region that extends for a first distance (measured parallel... Agent: Western Digital Technologies, Inc. Attn: Lesley Ning

20090141404 - Flex cable assembly damper: A flex cable assembly for a head stack assembly of a hard disk drive comprises a flex cable for conducting data signals from the head stack assembly to a connector. The flex cable comprises a dynamic loop section between a termination for the head stack assembly and the connector. A... Agent: Hitachi C/o Wagner Blecher LLP

20090141405 - Transducer positioning assembly: An actuator assembly is provided for positioning a transducer with a primary frame and a secondary frame mounted thereto for transverse translation. A coarse actuator is connected to the frames for translating the secondary frame incrementally. A carriage with a transducer is mounted to the secondary frame for transverse translation.... Agent: Brooks Kushman P.C. / Sun / Stk

20090141407 - Magnetic head and recording apparatus employing the same: A magnetic head and a recording apparatus employing the same are provided. The magnetic head includes a recording member, a field inducing member inducing a magnetic field to the recording member, a shield member having the same direction of magnetization as the recording member in a recording operation, and a... Agent: Mcneely Bodendorf LLP

20090141406 - Magnetic head for perpendicular magnetic recording and method of manufacturing same: A magnetic head includes a pole layer and a shield. The shield includes a shield layer having a front end face located in the medium facing surface at a position forward of an end face of the pole layer along a direction of travel of the recording medium. The magnetic... Agent: Oliff & Berridge, PLC

20090141408 - Magnetoresistance effect element, magnetic head, magnetic reproducing apparatus, and magnetic memory: A magnetoresistance effect element comprises a magnetoresistance effect film and a pair of electrode. The magnetoresistance effect film having a first magnetic layer whose direction of magnetization is substantially pinned in one direction; a second magnetic layer whose direction of magnetization changes in response to an external magnetic field; a... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090141410 - Current-perpendicular-to-the-plane structure magnetoresistive element and method of making the same and storage apparatus: An electrically-conductive or insulating non-magnetic intermediate layer is inserted between a free magnetic layer and a pinned magnetic layer in a current-perpendicular-to-the-plane (CPP) structure magnetoresistive element. At least one of the free magnetic layer and the pinned magnetic layer is made of a nitrided magnetic metal alloy. This nitrided magnetic... Agent: Greer, Burns & Crain

20090141409 - Spin filter spintronic devices: A spin filter transistor having a semiconductor structure. A spin injector including a first spin filter tunnel barrier is positioned on the semiconductor structure. A spin detector including a second spin filter tunnel barrier is positioned on the semiconductor. Highly polarized spins injected from the spin injector are transported through... Agent: Gauthier & Connors, LLP

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