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Dynamic magnetic information storage or retrieval February patent applications/inventions, industry category 02/09

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.
  
02/26/2009 > patent applications in patent subcategories. patent applications/inventions, industry category

20090052074 - Perpendicular magnetic recording media and magnetic storage apparatus using the same: Embodiments of the present invention provide a perpendicular magnetic recording media having excellent resolution, signal to noise ratio (S/N), and a small adjacent track erasure. According to one embodiment, underlayers for controlling the orientation and segregation of a magnetic layer, a magnetic layer including an oxide and an alloy of... Agent: Townsend And Townsend And Crew LLP

20090052075 - Systems and methods for improved synchronization between an asynchronously detected signal and a synchronous operation: Various embodiments of the present invention provide systems and methods for synchronizing data processing. As one example, a method for synchronizing data processing is disclosed that includes receiving a data input, and sampling the data input at a sample period to generate a sample set. A first pattern is received... Agent: Hamilton,desanctis & Cha (lsi)

20090052076 - Thermally assisted magnetic head with optical waveguide: A thermally assisted magnetic head comprises a main magnetic pole layer having a magnetic pole end part exposed at a medium-opposing surface opposing a magnetic disk, and an optical waveguide for deflecting laser light incident thereon into a laminating direction. The main magnetic pole layer is positioned on a side... Agent: Oliff & Berridge, PLC

20090052077 - Thermally assisted magnetic head with optical waveguide and light shield: The thermally assisted magnetic head includes a magnetic head part having a medium-opposing surface and a back face opposing the medium-opposing surface. The magnetic head part has a recording head part, an optical waveguide, and light shields. The optical waveguide extends along the opposing direction of the medium-opposing surface and... Agent: Oliff & Berridge, PLC

20090052078 - Thermally assisted magnetic head, head gimbal assembly, and hard disk drive: A slider has a slider substrate, an electromagnetic transducer, a waveguide for receiving light from a surface on the side opposite from a medium-opposing surface and guiding the light to the medium-opposing surface side, and a device electrode electrically connected to the electromagnetic transducer. A light source unit includes a... Agent: Oliff & Berridge, PLC

20090052079 - Magnetic head slider fabrication method, preamplifier and magnetic disk drive: Embodiments of the present invention set the resistance value and resistance change of a magnetoresistive element as the comparison criteria of a tester without use of an actual magnetic head slider in an inspection process during fabrication of magnetic head sliders. According to one embodiment, at the time of default... Agent: Townsend And Townsend And Crew LLP

20090052080 - Monitoring a fly height of a magnetic transducer: A method for monitoring a fly height of a magnetic transducer comprises flying the magnetic transducer at a distance of separation from a recording media. The fly height is modulated with a predetermined modulation frequency with a fly height control device. A read-back signal is read from the recording media... Agent: Hitachi C/o Wagner Blecher LLP

20090052081 - Compensation for variable servo track width: A track map of a disk drive is generated to compensate for various conditions. A track map is a stored measurement of every “half” servo track width on a disk. Every servo half track width is measured in the factory on a disk and then the data is stored on... Agent: Procopio, Cory, Hargreaves & Savitch, LLP Iomega/emc

20090052082 - Air bearing at opposite side of linear tape to support tape into contact with head slider: A tape head and bearing assembly comprises an air bearing structure having a tape bearing surface with a plurality of openings therein configured to provide a continuous air bearing of pressurized air to support a linear tape moving along a path, the air bearing being provided on only one side... Agent: John H. Holcombe

20090052083 - Magnetic recording medium and production method thereof: A method for producing a magnetic recording medium, including depositing an imprint resist layer on a magnetic layer containing a ferromagnetic material and a first non-magnetic material, on a substrate, transferring a concavo-convex pattern onto the imprint resist layer by pressing against the imprint resist layer an imprint mold structure... Agent: Sughrue Mion, PLLC

20090052086 - Method of making head slider and resultant head slider: A laser beam is radiated to the corner of the back surface of the head slider having the front surface defining a medium-opposed surface. This method employs a laser beam radiated to the corner of the back surface of the head slider. The material thus gets molten at least partly... Agent: Greer, Burns & Crain

20090052084 - Slider with contact features initiated at wafer level: A method is disclosed for producing sliders with protective contacts features the fabrication of which is initiated at the wafer level. Recesses are formed in the wafer, a protective material is provided in the recesses, and the wafer is sliced along the recesses and diced into sliders, such that the... Agent: Seagate Technology LLC C/o Westman Champlin & Kelly, P.A.

20090052085 - Storage apparatus and head suspension assembly: A head slider has a medium-opposed surface opposed to a storage medium at a distance in a storage apparatus. The medium-opposed surface receives airflow through relative movement between the storage medium and the head slider. The flexure holds the head slider at a predetermined mounting area. The head slider flies... Agent: Greer, Burns & Crain

20090052087 - Air bearing at opposite side of linear tape to support tape into contact with head slider: A tape head and bearing assembly comprises an air bearing structure having a tape bearing surface with a plurality of openings therein configured to provide a continuous air bearing of pressurized air to support a linear tape moving along a path, the air bearing being provided on only one side... Agent: John H. Holcombe

20090052088 - Swaging process for actuator arm of hard disk drive: A hard disk drive that includes an actuator arm assembly with an adhesive attached to an actuator arm and a head gimbal assembly swage openings of the arms. The adhesive can be attached to either head gimbal assembly or arm before they are joined together. The head gimbal assembly is... Agent: Irell & Manella LLP

20090052089 - Thin-film magnetic head having cpp structure magneto-resistive effect device and hard disk system: The thin-film magnetic head of the invention comprises a magneto-resistive effect device of the CPP (current perpendicular to plane) structure including a multilayer film comprising a stack of a fixed magnetization layer, a nonmagnetic layer and a free layer stacked one upon another in order, with a sense current applied... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090052090 - Disk device and electronic equipment using the same: A disk device includes an actuator which can be turned around a shaft bearing portion as a turning center in a radius direction of a recording medium, a ramp block which holds a part of the actuator on the occasion of retracting a head portion of the actuator, a circuit... Agent: Ratnerprestia

20090052091 - Monitoring a fly height of a magnetic transducer: A method for monitoring a fly height of a magnetic transducer comprises flying the magnetic transducer at a distance of separation from a recording media. A read-back signal is read with the magnetic transducer from the recording media. The read-back signal is rectified to produce a rectified signal. The rectified... Agent: Hitachi C/o Wagner Blecher LLP

20090052092 - Perpendicular magnetic recording head laminated with afm-fm phase change material: A PMR writer is disclosed that minimizes pole erasure during non-writing and maximize write field during writing through an AFM-FM phase change material that is in an AFM state during non-writing and switches to a FM state by heating during writing. The main pole layer including the write pole may... Agent: Saile Ackerman LLC

20090052093 - Magnetic head assembly and magnetic tape driving apparatus: A magnetic head assembly of the present invention includes a head rail having a plurality of head element portions each including a MR element and sliding portions that come into contact with a magnetic tape, and a protective film on a magnetic tape sliding surface of the head element portions... Agent: Birch Stewart Kolasch & Birch

20090052094 - Magnetic head for perpendicular magnetic recording and method of manufacturing the same, the magnetic head including pole layer and two shields sandwiching the pole layer: A magnetic head includes a pole layer, a first and a second shield disposed to sandwich the pole layer, and a nonmagnetic layer disposed around the first shield. The pole layer includes a first portion having an end face located in a medium facing surface, and a second portion that... Agent: Oliff & Berridge, PLC

20090052095 - Magnetic recording head and magnetic recording apparatus: a main magnetic pole; a laminated body; and a pair of electrodes. The laminated body includes a first magnetic layer having a coercivity lower than magnetic field applied by the main magnetic pole, a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic... Agent: Nixon & Vanderhye, PC

  
02/19/2009 > patent applications in patent subcategories. patent applications/inventions, industry category

20090046385 - Magnetic recording disk and disk drive with amplitude-type servo fields having patterned alternating-polarity servo islands for read/write head positioning: A magnetic recording disk drive has a disk with pre-patterned nondata servo sectors extending generally radially across the data tracks for use in positioning the read/write heads on the data tracks. The servo sectors include a synchronization pattern of generally radially directed magnetized marks, a first field of generally radially... Agent: Thomas R. Berthold

20090046386 - Data formatting in data storage: A method of processing data comprising arranging data into a data group comprising a plurality of sub groups each said subgroup comprising a plurality of columns; for each column, determining at least one checksum data of said column; and for each column, storing the checksum data of that column within... Agent: Hewlett Packard Company

20090046387 - Patterned media with low switching filled and adjacent track encroachment (ate) using ecc (exchange coupled composite) media: A patterned disk for a hard disk drive. The patterned disk includes a hard magnetic layer over a substrate. The disk further includes an exchange control layer adjacent to the hard magnetic layer and a soft magnetic layer adjacent to the exchange control layer. The hard and soft magnetic layers... Agent: Irell & Manella LLP

20090046388 - Head slider having lubricant layer on its floating surface: A head slider that includes a slider body having a air bearing surface, a magnetic head provided on the slider body, and a lubricant layer disposed on the air bearing surface, the lubricant layer being composed of a fluorocarbon resin.... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20090046389 - Spacer keys with pivoting supports: An apparatus for attaching one or more HGAs to an actuator assembly including one or more actuator arms comprises a set of pivoting supports corresponding to the one or more HGAs and mechanisms that pivot each of the pivoting supports between open positions and closed positions. For each of the... Agent: Shumaker & Sieffert, P.A.

20090046391 - 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

20090046390 - System, method, and apparatus for an independent flexible cable damper for reducing flexible cable fatigue in a hard disk drive: A hard disk drive has a flexible cable and a flexible cable damper positioned adjacent to but separate from the flexible cable. The damper is a thin film loop with a damper patch that is completely independent of the flexible cable. The damper strip is a non-signal carrying substrate and... Agent: Bracewell & Giuliani LLP

20090046392 - Voice coil motor and hard disk drive with the same: A voice coil motor for a hard disk drive includes an inner core having an inner surface, an outer plate having an inner surface, a permanent magnet, and a coil of wire. The outer plate is positioned in spaced relation to the inner core such that a gap is defined... Agent: Nixon & Vanderhye, PC

20090046393 - Method for reading magnetic data: A method of reading magnetic data from a magnetically-activatable sheet product carrying magnetic data. The product comprises a pair of laminated outer sheets between which is a magnetic layer comprising magnetically-activatable particles in a binder matrix. For reading the data, a thin-film magnetoresistive sensor is used in which the shape... Agent: Buchanan, Ingersoll & Rooney PC

20090046395 - Magnetoresistive effect thin-film magnetic head and method for fabricating same: A magnetoresistive effect thin-film magnetic head including a magnetoresistive effect element having a CPP structure in which the gap length can be precisely optimized and a method for fabricating the magnetoresistive effect thin-film magnetic head are provided. The stacked magnetoresistive effect thin-films having the cap layer as the top layer... Agent: Buchanan, Ingersoll & Rooney PC

20090046394 - Sensor shape and etching process of cpp magnetic head for reduce property degradation: Embodiments of the present invention help to prevent a head characteristic from being deteriorated by re-deposition or damage which occurs when a sensor film is etched, a track width is narrowed, and the head characteristic is stabilized. According to one embodiment, when it is assumed that the thickness of the... Agent: Townsend And Townsend And Crew LLP

20090046396 - Magnetic recording medium, linear magnetic recording and reproduction system and magnetic recording and reproduction method: The present invention relates to a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on a nomnagnetic support. A product, Mrδ, of a residual magnetization Mr of the magnetic layer and a thickness δ of the magnetic layer is equal to or greater than... Agent: Sughrue Mion, PLLC

20090046397 - Methods and apparatus for a synthetic anti-ferromagnet structure with improved thermal stability: A synthetic antiferromagnet (SAF) structure includes a bottom ferromagnetic layer, a coupling layer formed over the bottom ferromagnetic layer, and a top ferromagnetic layer formed over the coupling layer. One of the top and bottom ferromagnetic layers comprises an amorphous alloy characterized by (Co100-aFea)100-zBz, where a is less than approximately... Agent: Ingrassia Fisher & Lorenz, P.C. (fs)

20090046398 - Method of biasing a magneto resistive sensor element: A method of biasing a magneto resistive sensor element includes providing at least one magneto resistive sensor element having a magnetic sensitivity along a first axis that is parallel to a plane of the at least one sensor element. A magnet is positioned adjacent to the at least one sensor... Agent: Dicke, Billig & Czaja

  
02/12/2009 > patent applications in patent subcategories. patent applications/inventions, industry category

20090040641 - Method and apparatus for phase-shift null-burst-pattern: A media includes a plurality of tracks, a preamble portion including a set of signals, a first servo burst having a first plurality of signals written substantially in phase with the preamble portion, and a second servo burst written out of phase with the preamble and the first servo portion.... Agent: Schwegman, Lundberg & Woessner, P.A.

20090040643 - Method and apparatus for writing timing based servo tracks on magnetic tape using complementary servo writer pairs: Method and apparatus for writing timing based (servo) tracks on magnetic recording tape using complementary servo writer pairs. A magnetic tape intended to store, for instance, computer data conventionally contains servo tracks in addition to the data tracks. Typically many servo tracks and data tracks are arranged laterally across the... Agent: Morrison & Foerster LLP

20090040642 - Recording data simultaneously at two depths of a tilted magnetic medium: Methods and recording systems are configured for recording different data simultaneously at two different depths of a tilted magnetic medium, the tilted magnetic medium having a hard axis of magnetization, the axis being out of a plane of the medium and at an angle of −10 to −80 degrees with... Agent: John H. Holcombe

20090040644 - Laminated exchange coupling adhesion (leca) media for heat assisted magnetic recording: An apparatus includes a plurality of bilayer structures positioned adjacent to each other, each of the bilayer structures including a first layer of magnetic material having a first Curie temperature and a second layer of magnetic material positioned adjacent to the first layer, wherein the second layer has a second... Agent: Pietragallo Gordon Alfano Bosick & Raspanti, LLP

20090040645 - Thermally assisted magnetic head, head gimbal assembly, and hard disk drive: A thermally assisted magnetic head comprises a slider having a medium-opposing surface and a light source unit secured to a surface of the slider on the side of the slider opposite from the medium-opposing surface. The slider has a slider substrate and a magnetic head part provided on a side... Agent: Oliff & Berridge, PLC

20090040646 - Thermally assisted recording system: A thermally assisted magnetic recording system is provided to achieve excellent thermal resistance and low noise. In one embodiment, a magnetic recording medium is used, in which the magnetic intergrain exchange coupling is large to let the magnetization be thermally stable by coupling the magnetic grains constituting the recording layer... Agent: Townsend And Townsend And Crew LLP

20090040647 - Magnetic disk apparatus and magnetic head control method: A magnetic disk apparatus includes: a driving unit; and control part configured to control the driving unit. The control part includes: a position error feedback control system and a two-degree-of-freedom control system. The position error feedback control system has an integrator and a phase-lead compensator and is operative to determine... Agent: Amin, Turocy & Calvin, LLP

20090040648 - Selecting a destination tape recording device for saving data: Selecting a destination tape recording device, out of a plurality of tape recording devices, for saving data. Particularly a technique for selecting a tape recording apparatus whose performance is optimal for data to be saved, thereby improving data backup performance in a plurality of tape recording apparatuses.... Agent: Ibm Microelectronics Intellectual Property Law

20090040649 - Method and arrangement for determining the position of a tape-like medium: A method and an arrangement for determining the position of a tape-like medium are proposed. The method provides for counting pulses which are supplied to the arrangement for determining the position to be counted, blocked or cancelled depending on the respective transport state. To this end, it is established whether... Agent: Joseph J. Laks Thomson Licensing LLC

20090040650 - Providing removable storage management services using removable storage error information: Provided are a method, system, and article of manufacture for providing removable storage management services using removable storage error information. Read/write error information is obtained for at least one removable storage by interfacing with the removable storage manager. The obtained read/write error information for the at least one removable storage... Agent: Konrad Raynes & Victor, LLP. Attn: Ibm37

20090040651 - Disc apparatus and method of storing servo information on disc medium: According to an aspect of an embodiment, a disc apparatus includes a medium being capable of storing data and including a plurality of sets of servo information, each set of the servo information having identification information, a head for writing data into and reading data from the medium, an actuator... Agent: Greer, Burns & Crain

20090040652 - Magnetic recording disk and disk drive with patterned phase-type servo fields for read/write head positioning: A magnetic recording disk drive uses a disk having pre-patterned servo sectors extending generally radially across the data tracks. The servo sectors include at least two position error signal (PES) bursts or fields. The phases of the PES fields in the servo readback signal are demodulated to generate a PES... Agent: Thomas R. Berthold

20090040653 - Variable spring-force mechanism for advancing tape media cartridges in a deep slot cell: An apparatus to generate a spring force increasing in accordance with a quantity of tape media cartridges stored in a deep slot cell. The apparatus may include a deep slot cell, a biasing element including a torsion spring, and an advancement element. The deep slot cell may store one or... Agent: Kunzler & Mckenzie

20090040654 - Electronic apparatus: An electronic apparatus 1 in which is mounted an electronic unit having a plurality of heat-generating sections including at least a first heat-generating section and a second heat-generating section includes: a hold frame 9 for holding the electronic unit, a first heat-conducting member 11 for transmitting heat generated by the... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090040655 - Thin-film magnetic head structure, method of manufacturing the same, and thin-film magnetic head: A method of manufacturing a thin-film magnetic head structure comprises the steps of preparing an insulating layer 10; forming a first resist layer 51 provided with a first slit pattern 51a corresponding to a very narrow groove part and a second slit pattern 51b corresponding to a temporary groove part... Agent: Oliff & Berridge, PLC

20090040656 - Magnetic tape apparatus: A magnetic tape apparatus includes a feeding unit for feeding a magnetic tape; a take-up unit for taking up the magnetic tape, a magnetic head disposed the downstream of the feeding unit and the upstream of the winding unit, in a traveling path of the magnetic tape from the feeding... Agent: Birch Stewart Kolasch & Birch

20090040657 - Recording data simultaneously at two depths of a tilted magnetic medium: Methods and recording systems are configured for recording different data simultaneously at two different depths of a tilted magnetic medium, the tilted magnetic medium having a hard axis of magnetization, the axis being out of a plane of the medium and at an angle of −10 to −80 degrees with... Agent: John H. Holcombe

20090040658 - Magnetic tape reel, tape cartridge using the same, recording and reproducing apparatus for recording and reproducing information in the tape cartridge, and information recording and reproducing method thereof: A magnetic tape reel that has a plurality of gear teeth capable of engaging with a plurality of engagement gear teeth provided with a reel engaging portion of a recording and reproducing apparatus and upon which magnetic tape can be wound, the magnetic tape reel comprising: a hub portion including... Agent: Birch Stewart Kolasch & Birch

20090040659 - Disk drive device and method for removing adhesion on a head: Embodiments of the present invention help to effectively remove adhesion on a head slider. In an embodiment of the present invention, a hard disk controller/multiprocessing unit (HDC/MPU) raises the temperature on the surface of a head slider with a heating element on the head slider to remove adhesion on the... Agent: Townsend And Townsend And Crew LLP

20090040660 - Thin-film magnetic head and manufacturing method thereof: A thin-film magnetic head includes a lower magnetic shield layer, an MR multi-layered structure formed on the lower magnetic shield layer so that current flows in a direction perpendicular to surfaces of laminated layers, an upper magnetic shield layer formed on the MR multi-layered structure, and an additional lower magnetic... Agent: Oliff & Berridge, PLC

20090040661 - Tunneling magnetic sensing element and method for making the same: An insulating barrier layer including a lower insulating layer composed of Al—O and an upper insulating layer composed of CoFe—O and disposed on the lower insulating layer is formed on a second pinned magnetic layer. A free magnetic layer is formed on the insulating barrier layer. According to this structure,... Agent: Brinks Hofer Gilson & Lione

20090040663 - Magnetic memory: A magnetic memory includes a stack, a first writing wire, and a second writing wire. The stack includes a magnetic pinned layer, a tunnel barrier insulating layer, and a magnetic free layer, so as to form a magnetic tunnel junction (MTJ). The MTJ has an easy axis. The first writing... Agent: J C Patents, Inc.

20090040662 - Magnetoresistive element having spacer layer that includes two layered regions composed of oxide semiconductor and nonmagnetic conductor phase sandwiched therebetween: An MR element includes a free layer having a direction of magnetization that changes in response to an external magnetic field, a pinned layer having a fixed direction of magnetization, and a spacer layer disposed between these layers. The spacer layer includes a first region, a second region and a... Agent: Oliff & Berridge, PLC

  
02/05/2009 > patent applications in patent subcategories. patent applications/inventions, industry category

20090034107 - Redundant data on hard drive: Duplicate copies of data may be stored in different sectors on the same track of a disk drive. When reading the data, the data may read from the sector that passes under the read head soonest, thus decreasing data access latency. In some embodiments, the duplicate sectors may be equally... Agent: Intel Corporation C/o Intellevate, LLC

20090034108 - Transfer method, transfer apparatus, and recording medium: A transfer method for transferring asperities formed on a master carrier or transfer information represented by the asperities onto a slave medium, comprises the step of bringing the master carrier on which microscopic asperities are formed into close contact with the slave medium by pressing the master carrier by pressure... Agent: Sughrue Mion, PLLC

20090034109 - Disk drive apparatus and media defect detection method: According to one embodiment, a disk drive apparatus includes a defect table formed using more than one defect detection standard. Methods and devices are described using different defect detection standards to detect and map defects of different sizes and in specific regions that can affect drive operation. Also, methods and... Agent: Schwegman, Lundberg & Woessner/toshiba

20090034110 - Disk drive apparatus and multi-tasking method: A disk drive apparatus is shown that provides multi-tasking of firmware and hardware separately. A shared data structure is shown that permits queuing of multiple task requests and storing of multiple task results for later use, decreasing a need for wait time between components such as disk drive firmware and... Agent: Schwegman, Lundberg & Woessner/toshiba

20090034111 - Magnetic head having track width expansion mechanism, magnetic storage device and control circuit: The present invention generally relates to a magnetic head and a magnetic storage device using a recording medium. More particularly, the present invention relates to a magnetic head for expanding the track width of the recording medium, a control circuit for controlling the magnetic head, and a storage device that... Agent: Greer, Burns & Crain

20090034112 - Methods and apparatus to vary input impedance of a hard disk drive read preamplifier: Methods and apparatus to vary the input impedance of a hard disk read preamplifier are disclosed. A disclosed method amplifies a read signal from a hard disk read head based on the impedance presented by the read head and changes the impedance presented to the read head based on the... Agent: Texas Instruments Incorporated

20090034113 - Disk device and electronic equipment using the same: It is equipped with a magnetic recording medium, a spindle motor which rotates the magnetic recording medium, ahead portion which carries out at least any one of recording and reproducing of information, an actuator which supports the head portion, a voice coil which turns the actuator, a relay wiring body... Agent: Ratnerprestia

20090034114 - Magnetic disk drive with head retraction control: Embodiments of the invention improve utility of a magnetic disk drive in which a head is retracted if the magnetic disk drive is in a dropping state. In one embodiment, an HDC/MPU provided in a magnetic disk drive judges whether the magnetic disk drive is in a dropping state based... Agent: Townsend And Townsend And Crew LLP

20090034115 - Magnetic recording medium, recording /reproducing apparatus, and stamper: A servo pattern is formed in a servo pattern region on at least one surface of a substrate of a magnetic recording medium by a concave/convex pattern including a plurality of convex parts, at least protruding end parts of which are formed of magnetic material, and at least one concave... Agent: Greenblum & Bernstein, P.L.C

20090034116 - Storage apparatus, control method, and control device: A rotation disturbance compensation control unit applies a compensation signal to a positioning control unit so as to cancel out rotation disturbance vibration components detected by using acceleration velocity sensors. At predetermined timing, a position error detection unit detects respective position errors of the case in which the rotation disturbance... Agent: Greer, Burns & Crain

20090034117 - Storage apparatus, control method, and control device of storage apparatus: A seek control unit moves a head to the vicinity of a target track of a storage medium by coarse control, then switches it to fine control, and positions the head to the target track. A rotation disturbance compensation control unit applies a rotation disturbance vibration detection signal based on... Agent: Greer, Burns & Crain

20090034118 - Fluid dynamic bearing device, spindle motor and disk drive apparatus: A fluid dynamic bearing device includes a sleeve having a bearing hole into which a shaft is inserted, the sleeve rotatably supporting the shaft to make relative rotation about a center axis and a bearing housing made of a cold-rolled steel plate or a galvanized steel plate, the sleeve being... Agent: Volentine & Whitt PLLC

20090034119 - Perpendicular magnetic recording medium, and perpendicular magnetic recording and reproducing apparatus: The invention provides a perpendicular recording medium with high recording density, and a magnetic recording and reproducing apparatus, by improving the function of magnetic anisotropy of a soft magnetic underlayer. The perpendicular recording medium has at least a soft magnetic underlayer and a perpendicular magnetic recording layer on a non-magnetic... Agent: Sughrue Mion, PLLC

20090034120 - Electric field read/write head, method of manufacturing the same, and information storage device comprising electric field read/write head: An electric field read/write head, a method of manufacturing the electric field read/write head, and an information storage device including the electric field read/write head are provided. The electric field read/write head includes: a substrate having a first surface facing a recording medium and a second surface that is perpendicular... Agent: Sughrue Mion, PLLC

20090034121 - Magnetic head for perpendicular magnetic recording with coil wound around pole layer: A magnetic head includes a medium facing surface, a coil, and a pole layer that generates a write magnetic field. The pole layer includes: a track width defining portion having a first end located in the medium facing surface and a second end opposite to the first end; and a... Agent: Oliff & Berridge, PLC

20090034122 - Structure and process for production thereof: A structure has projecting structural members perpendicular to a substrate, the projecting structural members having respectively a curved top-end face covered continuously with a magnetic material. A process for producing a structure comprises the steps of placing an underlying metal layer and an anode-oxidization layer successively on a substrate, anodizing... Agent: Fitzpatrick Cella Harper & Scinto

20090034124 - Imprint mold structure, method for producing magnetic recording medium, and magnetic recording medium: An imprint mold structure of the present invention is for producing a magnetic recording medium having servo areas each of which has a preamble area where servo data for synchronization with a clock cycle is recorded, and data areas where user data is written, and contains a first convexo-concave pattern... Agent: Sughrue Mion, PLLC

20090034123 - Information recording and reproducing apparatus: There is proposed a nonvolatile information recording and reproducing device with low power consumption and high thermal stability. The information recording and reproducing apparatus according to an aspect of the present invention includes a recording layer and a unit for recording information by applying a voltage to the recording layer... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090034125 - Load/unload ramp spoiler for a hard disk drive: A load/unload ramp spoiler for a hard disk drive is disclosed. One embodiment provides a load/unload ramp body having at least one load/unload ramp associated therewith, the at least one load/unload ramp for receiving at least one slider coupled with an actuator assembly. In addition, at least one spoiler is... Agent: Hitachi C/o Wagner Blecher LLP

20090034126 - Magnetic head having cpp sensor with improved biasing for free magnetic layer: A magnetic head for a hard disk drive having a CPP read head sensor that includes a layered sensor stack including a free magnetic layer and hard bias elements that are disposed on the sides of the free magnetic layer to provide a biasing magnetization for the free magnetic layer.... Agent: Zilka-kotab, PC- Hit

20090034127 - Suspension with locally strengthened integrated trace connections: A head gimbal assembly may comprise a slider, a micro-actuator attached to the slider, a flexure to mount the slider and the micro-actuator, and a suspension comprising a support region, a main portion, and a moving portion, wherein the flexure comprises a plurality of trace sets to electrically couple the... Agent: Kenyon & Kenyon LLP

20090034128 - Method and apparatus for independent piezoelectric excitation in the micro-actuator assemblies of a hard disk drive for improved drive reliability: A hard disk drive using a micro-actuator assembly to position a slider over a track on a rotating disk surface. The micro-actuator assembly includes a first piezoelectric device and a second piezoelectric device, both mechanically coupled to the slider. The first piezoelectric device includes a first terminal electrically coupled to... Agent: Gregory Smith & Associates

20090034129 - Thin-film magnetic head comprising magneto-resistive effect device, and hard disk system: The thin-film magnetic head of the invention comprises a magneto-resistive effect device including a multilayer film and a bias mechanism portion including a bias magnetic field-applying layer formed on each widthwise end of the multilayer film. When the magneto-resistive effective device including a multilayer film and the bias mechanism portion... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090034131 - Magnetic reading head and magnetic recording apparatus: To provide a magnetic reading head that features high resolution and low noise, and that can support a hard disk with terabit-level surface recording density. A current is caused to flow from a pinned layer with its magnetization direction fixed by an antiferro magnetic material, to a non-magnetic thin wire... Agent: Stanley P. Fisher Read Smith LLP

20090034130 - Shield design for magnetic recording head: A magnetic shield in which all domain patterns and orientations are stable and which are consistently repeated each time said shield is exposed to an initialization field, is disclosed. This has been achieved by giving it a suitable shape which ensures that all closure domains can align themselves at a... Agent: Saile Ackerman LLC

20090034132 - Magnetic field detecting element having stack with a plurality of free layers and side shield layers: A magnetic field detecting element comprising: a stack including an upper magnetic layer, a lower magnetic layer and a non-magnetic intermediate layer sandwiched between said upper magnetic layer and said lower magnetic layer, wherein magnetization directions of said upper magnetic layer and said lower magnetic layer change in accordance with... Agent: Knobbe Martens Olson & Bear LLP

20090034133 - Magnetic field detecting element having thin stack with a plurality of free layers and thick bias magnetic layer: A magnetic field detecting element comprising: a stack including an upper magnetic layer, a lower magnetic layer and a non-magnetic intermediate layer sandwiched between said upper magnetic layer and said lower magnetic layer, wherein magnetization directions of said upper magnetic layer and said lower magnetic layer change in accordance with... Agent: Knobbe Martens Olson & Bear LLP

20090034134 - Magnetoresistance effect element, magnetic head and magnetic reproducing apparatus: A magnetoresistance effect element includes a magnetoresistance effect film including a magnetically pinned layer having a magnetic material film whose direction of magnetization is pinned substantially in one direction, a magnetically free layer having a magnetic material film whose direction of magnetization changes in response to an external magnetic field,... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090034135 - Differential magnetoresistive magnetic head: Embodiments of the present invention help to provide a single element type differential magnetoresistive magnetic head capable of achieving high resolution and high manufacturing stability. According to one embodiment, a magnetoresistive layered film is formed by stacking an underlayer film, an antiferromagnetic film, a ferromagnetic pinned layer, a non-magnetic intermediate... Agent: Townsend And Townsend And Crew LLP

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