Dynamic magnetic information storage or retrieval inventions 02/08

20080049347 - Disk processing device and method: A disk processing device holds and rotates a disk with a spindle. Processing tapes are supplied out and wound up by a tape reel unit so as to sandwich and be pressed on both surfaces of the disk through contact rollers. As a crankshaft is rotated, a sliding plate rotates... Agent: Beyer Weaver LLP

20080049349 - Data processing apparatus and control method thereof: A data recording apparatus holds device state information which is updated according to use of the apparatus and represents a use state of the apparatus, and device identification information unique to the apparatus. Upon recording data, the data recording apparatus acquires information associated with generation of recording data, which is... Agent: Cowan Liebowitz & Latman P.C. John J Torrente

20080049348 - Modulated timing based servo pattern strings for magnetic-based storage media: A magnetic storage media has a servo track segment and a timing based servo band recorded on the servo track segment. The timing based servo band includes a modulated timing based servo pattern string representative of magnetic encoded servo position information for facilitating a determination of a servo position error... Agent: Frank C. Nicholas Cardinal Law Group

20080049350 - Disk drive with multi-protocol channel to controller interface and method: An apparatus and associated method are described for use in a disk drive including a disk that that is supported for controlled rotation and for cooperating with a transducer arrangement for accessing the disk in performing a data operation. The disk includes an arrangement of servo track wedge segments for... Agent: Workman Nydegger

20080049352 - Magnetic reproducing method for suppressing low temperature noise: Provided is a magnetic reproducing method that enables a thin-film magnetic head including a head element for reading data signals which has a noise in its output due to a low temperature to bring out an excellent read characteristic in which the noise is suppressed even under the use environment... Agent: Oliff & Berridge, PLC

20080049351 - Testing method of head element and magnetic recording and reproducing apparatus capable of head evaluating: Provided is a method for testing a head element that enables proper evaluation of the head element based on a characteristic of the head element under high-temperature and high-stress conditions. The testing method can be performed on a thin-film magnetic head including a head element and a heating element capable... Agent: Oliff & Berridge, PLC

20080049354 - Magnetic disk drive apparatus and method of controlling the same: According to one embodiment, a magnetic disk drive apparatus includes a nonvolatile memory which serves as a cache memory when data is recorded in a magnetic disk which records data, a threshold value setting unit which sets a threshold value of a storable size of the nonvolatile memory in accordance... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20080049355 - Data sector phase correction method and disk drive apparatus using the same: A method to correct a phase of a data sector due to rotational slip of a disk includes measuring a difference in the phase of a servo sector between a plurality of disks and adjusting an amount of cylinder skew of a logical data sector between the plurality of disks... Agent: Stanzione & Kim, LLP

20080049356 - Servo pattern with encoded data: Data storage tape comprises one or more data tracks and a servo band. The servo band stores a plurality of servo patterns within a servo frame to facilitate head positioning relative to the data tracks. Spacings between the servo patterns within the servo frame vary to encode information in the... Agent: Attention: Eric D. Levinson Imation Corp.

20080049353 - Transport amount correcting method, recording apparatus, and storage medium having program stored thereon: A transport amount correcting method, including; (A) storing in a memory, in regard to a medium of a predetermined size, correction values associated with relative positions of the medium and a head; and (B) when carrying out recording on the medium of the predetermined size, transporting the medium while correcting... Agent: Sughrue Mion, PLLC

20080049357 - Thermally assisted magnetic recording system: where X denotes the nondimensional value of the recording track width divided by 10−9 m, and Y denotes a magnetic field (expressed in units of A/m) which a magnetic pole for head-field application applies to the center of the information recording medium in the direction of the thickness thereof. Note... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080049358 - Tape head with outrigger: A magnetic head assembly according to one embodiment of the present invention includes a substrate having a tape bearing surface. A plurality of elements are coupled to the substrate and positioned towards the tape bearing surface. The elements selected from a group consisting of readers, writers, and combinations thereof. A... Agent: Zilka-kotab, PC

20080049359 - Magnetic recording medium and magnetic recording and reproducing apparatus: In a discrete track medium and a patterned medium, a meniscus adsorptive force is reduced and writing into adjacent tracks is prevented. A magnetic layer in lands or patterns in the discrete track medium or the patterned medium is formed into a cylindrical shelly or spherical shelly shape with a... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080049360 - Suspension for disc drive apparatus: A suspension has a load beam and a flexure having a tongue portion to which a slider is attached. The load beam has a pin insertion hole formed between a proximal portion of the load beam and the slider and an opening formed between a distal portion of the load... Agent: Frishauf, Holtz, Goodman & Chick, PC

20080049361 - Head suspension and head gimbal assembly: Connecting pieces extend outward from the support plate in the opposite directions along a crossline. A flexure body is connected to the connecting pieces. A pad is fixed to the support plate at a position ahead of the crossline. A wiring pattern extends from a pad. The wiring pattern defines... Agent: Patrick G. Burns Greer, Burns & Crain, Ltd.

20080049362 - Tolerance ring for data storage with cut-out feature for mass control: A tolerance ring configured to improve mass eccentricity of an actuator arm assembly. The tolerance ring has a cylinder with a predetermined length between two ends, with a gap along the predetermined length of the cylinder, the gap having a first and a second edge, the cylinder having an aperture... Agent: Snell & Wilmer LLP (oc)

20080043355 - Measuring method of flying height and magnetic disk drive apparatus capable of adjusting flying height: Provided is a measuring method of flying height of a thin-film magnetic head, capable of measuring the flying height without using a new component, such as an atmospheric pressure sensor, adverse to a requirement of reduction in cost and size. The measuring method of flying height comprises the steps of:... Agent: Oliff & Berridge, PLC

20080043356 - Read error recovery using soft information: In general, this disclosure describes read recovery techniques for data storage devices that use soft information associated with multiple read operations to detect data. Specifically, the read recovery techniques comprise computing soft information for each bit detected during a first read operation of a data storage medium, computing soft information... Agent: Shumaker & Sieffert, P. A.

20080043357 - Gain control device, storage device and, gain control method: Before a system area of the storage device is read immediately after the activation of the storage device, a read signal is output from a magnetic head to read servo information in the system area. An HDIC amplifies gain of the read signal as first gain amplification. Then, a VGA... Agent: Patrick G. Burns, Esq. Greer, Burns & Crain, Ltd.

20080043359 - Method of writing data using coercivity distribution of data storage medium: A method of writing data using a coercivity distribution of a data storage medium, including mapping the coercivity distribution of the data storage medium including a plurality of write spots in which data can be written, measuring a current ambient temperature, and if the ambient temperature is higher than a... Agent: Stanzione & Kim, LLP

20080043362 - Certifying concentric data in eccentric servo data tracks of pre-formatted media: Apparatus and method for rotating a data storage media having pre-formatted servo data tracks adjacent a data transfer member, and retrieving readback data with the data transfer member along a path that is non-concentric in relation to the servo data tracks. The data transfer member is controlled by a control... Agent: Fellers, Snider, Blankenship, Bailey & Tippens, P.C.

20080043363 - Storage apparatus, control method, control device, and program: An amplitude measurement unit measures an amplitude of a read signal from a preamble unit in a servo area of a predetermined frame number m per one rotation of the recording medium for a predetermined cycle number n while increasing an electric power amount distributed to the heater in the... Agent: Greer, Burns & Crain

20080043364 - Servo information recording device and servo information recording method: A servo information recording device comprises: a head swingably supported relative to a predetermined swing axis; a head drive section that swings the head within a predetermined zone in the radial direction of the disk medium; and a controller that controls the head drive section and writes the servo information... Agent: Patrick G. Burns Greer, Burns & Crain, Ltd.

20080043365 - Suspension capable of reducing loss of high frequency signal: A suspension including a supporting layer, a conductive layer, and a dielectric layer. The conductive layer is formed as a plurality of traces. The supporting layer is formed of a rigid material to support the conductive layer. The dielectric layer is formed between the supporting layer and the conductive layer... Agent: Stanzione & Kim, LLP

20080043358 - Magnetic disk drive: Embodiments of the present invention reduce lowering of a recording current and a recording magnetic field that might occur upon execution of write pre-compensation for compensating the NLTS according to a perpendicular magnetic recording method. According to one embodiment, the recording current overshoot is increased for recording a high NLTS... Agent: Townsend And Townsend And Crew LLP

20080043360 - Thermally assisted magnetic head: A thermally assisted magnetic head has a slider having a medium-facing surface, and a light source unit having a light source support substrate, and a light source disposed on the light source support substrate. The slider has a slider substrate and a magnetic head portion disposed on a side of... Agent: Oliff & Berridge, PLC

20080043361 - Controlling operation of a memory device: A method provides controlling operation of a memory device. The method includes receiving activity information relating to at least one electromagnetic field external to the memory device. The method further includes controlling storing data to and reading from the memory device based on the activity information. A memory device and... Agent: Squire, Sanders & Dempsey L.L.P.

20080043366 - Tape cartridge auxiliary memeory based library: A data storage library is described including a plurality of tape cartridges wherein each of the tape cartridges possesses an auxiliary radio frequency memory device in which auxiliary digital data is stored. The library also includes at least one drive disposed substantially within the library capable of transferring user data... Agent: Spectra Logic C/o Hiscock & Barclay, LLP

20080043367 - Optical disk device: An optical disk device of the present invention has a main PC board carrying a semiconductor element and attached at the rear of a drawer to efficiently dissipate a heat generated from the semiconductor element. The drawer is formed of a material having good thermal conductivity. A thermal conductive member... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080043368 - Disk apparatus: According to one embodiment, a recording medium, a drive motor which supports and rotates the recording medium, heads, and a head actuator are arranged in a case of a disk apparatus. The drive motor includes a rotor rotatably supported by a fluid bearing and a stator arranged at an outer... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20080043370 - Magnetoresistive device having bias magnetic field applying layer that includes two magnetic layers antiferromagnetically coupled to each other through intermediate layer: An MR element includes a free layer whose direction of magnetization changes in response to an external magnetic field. Two bias magnetic field applying layers are disposed adjacent to two side surfaces of the MR element. Each bias magnetic field applying layer includes a nonmagnetic intermediate layer, and a first... Agent: Oliff & Berridge, PLC

20080043369 - Magnetic disk drive: Embodiments of the present invention prevent a magnetic disk drive from increasing in size and in manufacturing cost and reduces a positioning error of a magnetic head. An embodiment of a magnetic disk drive in accordance with the present invention includes: a disk-shaped magnetic disk that is rotated and driven;... Agent: Townsend And Townsend And Crew LLP

20080043371 - Disk storage cartridge: A media cartridge including a first substantially rectangular surface, a second substantially rectangular surface, and one or more side surfaces, where the first substantially rectangular surface and the second substantially rectangular surface are connected by the one or more side surfaces. Further, a disk drive assembly is enclosed by the... Agent: Osha Liang L.L.P./sun

20080043372 - Magnetic disk drive and head slider: A head slider includes a positive pressure generating portion constituting an air bearing surface that is formed at land portions higher than a base surface of a head slider body formed opposite to a storage medium by a predetermined difference in level, and that generates a positive pressure; a head... Agent: Patrick G. Burns, Esq. Greer, Burns & Crain, Ltd.

20080043373 - Apparatus for protecting head suspension assembly: An apparatus for protecting a head suspension assembly includes an actuator unit including a plurality of suspensions to which a plurality of heads are fixed, respectively, an actuator block, and a coil-arm unit including a coil. A first protection member includes a first support unit that supports a part of... Agent: Patrick G. Burns, Esq. Greer, Burns & Crain, Ltd.

20080043375 - Tolerance ring having variable height and/or assymmetrically located bumps: A tolerance ring configured to reduce torque ripple for a pivot bearing in an actuator arm assembly. The tolerance ring comprises a cylinder having a predetermined length, and a first and a second row of contacting portions arranged around the surface of the cylinder, the contacting portions of the second... Agent: Snell & Wilmer LLP (oc)

20080043374 - Tolerance ring having various end tab designs to prevent interlocking: A tolerance ring configured to prevent interlocking during shipping and handling. The tolerance ring has a cylinder with a first radius about an axis of rotation and a gap in the cylinder surface having a first edge and second edge extending along the axis. The gap in the cylindrical base... Agent: Snell & Wilmer LLP (oc)

20080043376 - Magnetic resistive head and magnetic recording apparatus: A magnetoresistive head comprises a free magnetic layer that has first and second free magnetic films sandwiching a non-magnetic intermediate film therebetween, the respective magnetizing directions of the first and the second free magnetic films are antiparallel. The length of the free magnetic layer in the direction of the track... Agent: Townsend And Townsend And Crew, LLP

20080043377 - Magnetic head: The magnetic head is capable of stabilizing arrangement of magnetic domains in a shield layer of a read-head, preventing variation of characteristics of the read-element and improving reliability. The magnetic head comprises the read-head, in which the read-element is magnetic-shielded by a shield layer. A step-shaped section is formed in... Agent: Patrick G. Burns Greer, Burns & Crain, Ltd.

20080043378 - Pedestals for use as part of magnetic read heads: We describe a family of magnetic read heads that each includes a GMR or MTJ stack. A part, no more than about 0.1 microns thick, has been removed from this stack a to form a pedestal having sidewalls comprising a vertical section that includes all of the free layer.... Agent: Saile Ackerman LLC

20080043380 - Magnetoresistive element and manufacturing method thereof: Intensity of the longitudinal bias field applied to a free soft magnetic layer in a magnetoresistive element can be adjusted after formation, by providing of a composite ferromagnetic layer for longitudinally biasing the free soft magnetic layer. The composite ferromagnetic layer has sub-ferromagnetic layers 15a, 15b, and 15c having different... Agent: Patrick G. Burns Greer, Burns & Crain, Ltd.

20080043379 - Magnetic devices and techniques for formation thereof: Techniques for forming a magnetic device are provided. In one aspect, a magnetic device includes a magnetic tunnel junction and a dielectric layer formed over at least a portion of the magnetic tunnel junction. The dielectric layer is configured to have an underlayer proximate to the magnetic tunnel junction, and... Agent: Ryan, Mason & Lewis, LLP

20080043381 - Amr sensor element for angle measurement: In order to provide a magnetoresistive angle sensor (100) comprising a sensor device for detecting an angle (α) of an external magnetic field relative to a reference axis of the sensor device, which allows measurement of the angle (α) without the measurement result being affected by manufacturing errors, it is... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080037151 - Audio reproducing apparatus, audio reproducing method, and program: This invention provides an audio reproducing apparatus which reproduces plural digital audio signals and synchronizes them with each other. The audio reproducing apparatus includes a synchronization setting unit 11 which synchronizes the plural audio signals by allocating, on a time axis, plural pieces of audio reproduction time information of the... Agent: Wenderoth, Lind & Ponack L.L.P.

20080037152 - System and method for measuring readback signal amplitude asymmetry in a perpendicular magnetic recording disk drive: A method for operating a tester for testing heads and disks of a magnetic recording disk drive during manufacturing calculates the readback signal amplitude asymmetry in the frequency domain without the need for measurement in the time domain with a peak detection channel. The tester first signals the write head... Agent: Thomas R. Berthold

20080037154 - High areal density tape format and head: A magnetic head having a tape bearing surface according to one embodiment includes a plurality of writers, each writer having first and second poles each having a pole tip positioned towards the tape bearing surface, a front gap defined between the pole tips, and a back gap defined along an... Agent: Zilka-kotab, PC

20080037156 - Combined servo controller for an actuator and a tray motor of an optical drive system: A control system controlling the tilt actuator and the tray motor of a optical disk drive includes a control device including a control unit generating control signals and a selection unit outputting a selection signal. A signal amplifier coupled to the control unit amplifies signals from the control unit. A... Agent: North America Intellectual Property Corporation

20080037155 - Reducing read/write head track misregistration: Methods and systems for reducing read/write head track misregistration are described. According to one embodiment, a first signal is received from a first capacitive sensor that faces a surface of a disk associated with a disk drive. A second signal is received from a second capacitive sensor that faces the... Agent: Wagner Murabito & Hao LLP

20080037158 - Adaptive disturbance repressing method and apparatus, and disk drive apparatus using the same: A method and apparatus to safely repress disturbances from being applied to a system from the surroundings in which the system is used. The method of adaptively repressing disturbances includes estimating frequency components of a disturbance applied to a system in a user environment; and optimizing parameter values determining characteristics... Agent: Stanzione & Kim, LLP

20080037159 - Tape guide system and tape drive system implementing same: A tape guide assembly and tape drive system including the same comprise a roller guide adapted for engaging a tape wrapped around at least a portion of an outer surface thereof, and at least one support for lifting the tape from the roller guide.... Agent: Zilka-kotab, PC

20080037163 - Clamp device: A clamp device that clamps a disc onto a spindle motor that rotates the disc includes a clamp ring stacked on the disc and clamps the disc onto the spindle motor, a screw that fixes the clamp ring onto the spindle motor, and an axial force adjuster that nonlinearly changes... Agent: Kratz, Quintos & Hanson, LLP

20080037164 - Adaptive spindle motor startup method and disk drive using the same: An adaptive spindle motor startup method includes applying an internal driving voltage to a disk drive, sensing an internal temperature of the disk drive, and controlling the startup of a spindle motor by adjusting a startup factor related to a startup current applied to the spindle motor corresponding to the... Agent: Stanzione & Kim, LLP

20080037165 - Method and apparatus for a disk clamp used in a hard disk drive: Disk clamp including a disk clamp base and a disk clamp platform. Disk pack including at least one disk coupled between disk clamp and spindle motor. Hard disk drive including disk pack mounted on disk base. Manufacturing methods for disk clamp base, disk clamp platform, disk pack and hard disk... Agent: Gregory Smith & Associates

20080037153 - Characteristic evaluation method for magnetic disk medium: To measure the nonlinear distortion of a magnetic disk even at a high recording density, a nonlinear transition shift and a partial erasure are separately measured. A periodic pattern containing dibits and isolated bits, and a periodic pattern consisting only of isolated bits, are written and read in synchronism with... Agent: Rabin & Berdo, PC

20080037157 - Device and method for adjusting distance between magnetic head and data storage medium: A device and method for adjusting a distance between a magnetic head and a data storage medium are provided. In the device, a microprocessor outputs a control signal for adjusting the distance to a pre-amplifier based on a correlation between a flying height (FH) and a coefficient of a fifth... Agent: Volentine & Whitt PLLC

20080037160 - Media cartridge storage device for an autoloading data storage and retrieval system: A cartridge storage device for a data storage and retrieval system according to one embodiment comprises a housing having a front and a back positioned on opposite ends of the housing; a plurality of cells in the housing, each cell adapted for receiving a media cartridge, and a drive mechanism... Agent: Zilka-kotab, PC

20080037162 - Disk drive with support structure for air dams and disk-vibration capacitive sensors: A data recording disk drive has one or more capacitive sensors for sensing out-of-plane vibration of the disk or disks. The sensors are attached to a support structure that is attached to the disk drive housing. Each sensor is associated with a disk and faces a surface of the disk... Agent: Thomas R. Berthold

20080037161 - Disk drive with support structure for damping plates and disk-vibration capacitive sensors: A data recording disk drive has one or more capacitive sensors for sensing out-of-plane vibration of the disk or disks. The sensors are attached to a support structure that is attached to the disk drive housing. Each sensor is associated with a disk and faces a surface of the disk... Agent: Thomas R. Berthold

20080037166 - Apparatuses and methods for pre-erasing during manufacture of magnetic tape: The present invention relates to direct current (“DC”) pre-erasing servo channels of a magnetic tape prior to writing servo data in a servo channel. The present invention particularly relates to those servo recordings which were written with a uni-polar current waveform. The DC pre-erase is performed using a uni-polar direct... Agent: Dorsey & Whitney LLP Intellectual Property Department

20080037167 - Forming a head with reduced pole tip recession: Embodiments of the present invention pertain to forming a head with reduced pole tip recession. According to one embodiment, a pole tip element is formed from a platinum containing material. During diamond like carbon (DLC) processing, hydrogen and hydrogen containing compounds are removed from a vacuum plasma processing environment that... Agent: Wagner Murabito & Hao LLP

20080037168 - Laminated magnetic structure for use in a perpendicular magnetic write head: A magnetic structure for use in a perpendicular magnetic write head that prevents magnetic domain formation and reduces magnetic remanence in the structure. The magnetic structure includes magnetic layers sandwiched between thin non-magnetic layers. Each of the magnetic layers includes a relatively thicker layer of CoFe sandwiched between relatively thinner... Agent: Zilka-kotab, PC

20080037169 - Ionizing device for tape drive systems: A tape drive system includes a magnetic head, a drive mechanism for passing a magnetic tape over the head, and an ion generating device for providing ions in a vicinity of the tape, the ions being adsorbed onto the tape surface, which may include being absorbed by water on the... Agent: Zilka-kotab, PC

20080037170 - Magnetic head with mini-outriggers and method of manufacture: An exemplary magnetic head assembly for use with magnetic recording media is provided. In one example, a head includes a data island associated with at least one data transducer, the data island having a width along a direction of media transport and a radius of curvature. The magnetic head further... Agent: Morrison & Foerster LLP

20080037171 - Avoiding superparamagnetic trap by changing grain geometries in heat-assisted magnetic recording systems: A data storage medium for perpendicular recording has a substrate and a ferromagnetic layer on the substrate for storing data bits. The ferromagnetic layer has a plurality of elongate grains of magnetizable material extending perpendicular to the substrate which form magnetic domains representative of data. Each magnetic domain is separated... Agent: Seagate Technology LLC C/o Westman Champlin & Kelly, P.A.

20080037172 - Thin-film read element: The present invention relates to a thin-film read element for use in reading magnetic signals from a device. The read element includes a first thin-film read sensor and a second thin-film read sensor that are each configured to convert the magnetic signals of the device to electrical signals.... Agent: Brooks Kushman P.C. / Sun / Stk

20080037173 - Patterned media, method of manufacturing magnetic recording medium, and method of manufacturing a base: To provide patterned media having novel structure. Plural convex members 2991 are provided in an array form on a substrate 2990. The convex member has a shape such that the cross section at each plane in parallel to the substrate tapers toward the substrate. Magnetic recording layers 2992 are provided... Agent: Fitzpatrick Cella Harper & Scinto

20080037174 - Head gimbal assembly and manufacturing method thereof and disk drive unit with the same: A HGA includes a slider and a suspension for supporting the slider. The suspension includes a load beam, a base plate, and a flexure, which are assembled together. The flexure has a suspension tongue with a suspension through hole defined therein at a position corresponding to a center of the... Agent: Nixon & Vanderhye, PC

20080037175 - Ramp for polyoxmethylene resin hard disk drive: A ramp for a polyoxymethylene hard resin disk drive, which has an outgas level of not more than 20 μg/g. The ramp for a polyoxymethylene resin hard disk drive comprises the steps of providing an extruder, melt kneading a polyoxymethylene resin with a colorant while degassing through one or more... Agent: Birch Stewart Kolasch & Birch

20080037176 - Disk apparatus: A disk apparatus includes a ramp which holds a tip end of an arm at a position away from a disk, and a slit shroud having an airflow control plate. A side surface of the airflow control plate is opposed to a side surface of the disk, the airflow control... Agent: Greer, Burns & Crain

20080037177 - Recording apparatus: A recording apparatus including a recording head having an actuator and operable to perform recording on a recording medium by an operation of the actuator, a head holder holding the recording head, a circuit board having a heat-conductive substrate and provided on the head holder, a drive circuit operable to... Agent: Eugene Ledonne, Esq. Reed Smith LLP

20080037178 - Method and apparatus for an auxiliary mass damper in each actuator arm notch of a hard disk drive: Actuator arm includes an island coupling through a mote to at least two of actuator base, first and second actuator arm bridge. Head stack including at least one actuator arm. Head stack assembly including head stack. Hard disk drive including head stack assembly. Manufacturing methods for actuator arm, head stack,... Agent: Gregory Smith & Associates

20080037179 - Magnetic memory device: A magnetic memory device comprises a magnetic tunnel junction (MTJ) connecting to a bit line to a sense line through an isolation transistor. The MTJ includes a ferromagnetic layer having a magnetic hard axis. An assist current line overlies the bit line and is insulated from the bit line. The... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080037180 - Narrow track extraordinary magneto resistive [emr] device with wide voltage tabs and diad lead structure: An Extraordinary Magnetoresistive Sensor (EMR Sensor) having wide voltage lead tabs for reduced noise and increased signal to noise ratio. The leads can be formed in a triad structure, wherein a pair of voltage leads is located at either side of a current lead, or can be formed in a... Agent: Zilka-kotab, PC

20080037181 - Method of forming plating film, method of manufacturing magnetic device and method of manufacturing perpendicular magnetic recording head: A method of forming a plating film capable of improving magnetic properties is provided. A photoresist pattern, having a first opening with an aspect ratio greater than 1 and a second opening with an aspect ratio smaller than that of the first opening, is formed on a surface of a... Agent: Oliff & Berridge, PLC

20080037182 - Magnetoresistive sensor having a structure for activating and deactivating electrostatic discharge prevention circuitry: A structure for preventing Electrostatic Discharge (ESD) damage to a magnetoresistive sensor during manufacture. The structure includes a switching element that can be switched off during testing of the sensor and then switched back on to provide ESD shunting to the sensor. The switch can be a thermally activated mechanical... Agent: Zilka-kotab, PC

20080037184 - Exchange-coupling film incorporating stacked antiferromagnetic layer and pinned layer, and magnetoresistive element including the exchange-coupling film: An exchange-coupling film incorporates an antiferromagnetic layer and a pinned layer. The pinned layer includes a first ferromagnetic layer, a second ferromagnetic layer, a third ferromagnetic layer, a nonmagnetic middle layer, and a fourth ferromagnetic layer that are disposed in this order, the first ferromagnetic layer being closest to the... Agent: Oliff & Berridge, PLC

20080037183 - Lead overlay based cpp magnetoresistive sensor with exchange biased free layer: A current perpendicular to plane (CPP) magnetoresistive sensor having a current path defined by first and second overlying insulation layers between which an electrically conductive lead makes content with a surface of the sensor stack. The current path being narrower than the width of the sensor stack allows the outer... Agent: Zilka-kotab, PC

20080037185 - Magnetic memory and method for reading-writing information from-to magnetic storage element: A magnetic memory is provided in which the margin between a write current and a read current can be reduced. A magnetic storage element includes: a first magnetic layer in which the direction of magnetization can be reversed; a second magnetic layer in which the direction of magnetization is fixed;... Agent: Mathews, Shepherd, Mckay & Bruneau, P.A.

20080030887 - Control apparatus, control method, and computer product for magnetic tape device: A header data storage unit stores therein header data that identifies each file. A header data reader reads the stored header data, from the header data of the first file written to a magnetic tape to the header data of a target file, in order in which the files have... Agent: Staas & Halsey LLP

20080030886 - Methods for enabling functionality in multi-modal data storage systems: A method for enabling different modes on a multi-modal data storage system such as a tape-based data storage system includes enabling a data storage system to operate in at least one of two modes, a first of the modes being different than a second of the modes. In one embodiment,... Agent: Zilka-kotab, PC

20080030891 - Back electromotive force (bemf) calibration method, method of controlling unloading of disk drive apparatus using bemf calibration method, and disk drive apparatus using the same: A method of calibrating a parameter to measure the back electromotive force (BEMF) of a voice coil motor (VCM), and a method and apparatus to use the calibrating method to perform unloading control. The calibration method includes: reading servo data and measuring a BEMF value while seeking two predetermined points... Agent: Stanzione & Kim, LLP

20080030893 - Storage apparatus, in-vehicle navigation system, and method for controlling temperature of storage apparatus: A storage apparatus includes the following. A storage medium stores information. A drive unit rotatively drives the storage medium. A head section records and/or reproduces information from the storage medium rotatively driven by the drive unit. A detection unit detects temperatures of slide sections during rotative driving. PTC heaters heat... Agent: Posz Law Group, PLC

20080030888 - Transducer fly height distribution range reduction: Preferred embodiments of the present invention are generally directed to reducing variation in a distribution of transducer fly heights by selectively applying first and second fly height adjustment values to a plurality of transducers, the second fly height adjustment value being a multiple of the first fly height adjustment value.... Agent: Randall K. Mccarthy Fellers, Snider, Blankenship, Bailey & Tippens, PC

20080030889 - Self-servo writing using radially overlapped servo segments: In accordance with various embodiments, initial servo data are written to a storage medium as a series of radially overlapped spiral segments. Final servo data are thereafter written to the medium while concurrently servoing on said overlapped segments.... Agent: Fellers, Snider, Blankenship, Bailey & Tippens

20080030890 - Method of writing pattern on magnetic disk and device therfor: Embodiments of the present invention provide accurate pitch control of a servo write track. A Self-Servo-Write (SSW) according to an embodiment of the present invention determines a reference APC by reading a mark formed on the recording surface corresponding to the propagation head prior to starting the product servo pattern... Agent: Townsend And Townsend And Crew LLP

20080030892 - Feedforward controller and methods for use therewith: A controller includes a combining module that generates a total control signal for the drive device of a disk drive by combining a feedback control signal and a feedforward control signal. A feedback control module generates the feedback control signal in response to at least one state of the drive... Agent: Garlick Harrison & Markison

20080030894 - Servo writing with offset compensation for prewritten reference: In accordance with various embodiments, a rotatable member is mounted to a spindle hub so that initial servo data previously provided to the rotatable member are eccentrically offset with respect to a rotational center of the spindle hub. Compensation vales are determined to characterize said offset, after which final servo... Agent: Fellers, Snider, Blankenship, Bailey & Tippens

20080030895 - Fluid dynamic pressure bearing, spindle motor and storage disk drive bearing and a method of manufacturing thereof: A fluid dynamic bearing having a shaft (12) and a bearing sleeve (11) rotatably supported relative to each other. At least one of the shaft and the bearing sleeve is made of steel or stainless steel made of by weight C: 0.6˜1.20%; Si: 1.0 or less; Mn: 1.0% or less;... Agent: John C Garces Schulte Roth & Zabel

20080030896 - Magnetic head and storage medium drive: A thin film magnetic head has first and second magnetic poles spaced from each other at a medium-opposed surface. A magnetic pole end layer is opposed to the second magnetic pole in a space between the first and second magnetic poles. A magnetic piece or pieces are interposed between the... Agent: Patrick G. Burns Greer, Burns & Crain, Ltd.

20080030897 - Perpendicular magnetic write head with shunt structure to prevent read sensor interference: A magnetic head structure for use in perpendicular magnetic recording. The magnetic head includes a magnetic write head having a return pole with a magnetic shunt structure extending from the back end opposite the ABS. The magnetic shunt structure prevents magnetic field from the write coil from reaching and affecting... Agent: Zilka-kotab, PC

20080030898 - Disk apparatus: A disk apparatus comprising a chassis outer sheath having a base body 10 and a lid, in which a front surface of the chassis outer sheath is formed with a disk inserting opening 11 into which a disk is directly inserted, the lid is formed at its central portion with... Agent: Kratz, Quintos & Hanson, LLP

20080030899 - Dual sided uni-directional media for bi-directional linear tape drives: According to one aspect of the present invention a data storage tape is provided. In one example, the data storage tape comprises a substrate having a first recording layer and a second recording layer disposed on opposite sides of the substrate. Further, the first and second recording layers are uni-directional,... Agent: Morrison & Foerster LLP

20080030900 - Suspension gimbal designs with better dynamic performances: Gimbal designs are provided that minimize adverse dynamic performance of a HDD suspension, particularly subsequent to head-disk-interface (HDI) interactions. The improvement of operational performance can be seen in graphical representations of the vibrational modes of a gimbal mounted slider subsequent to such HDI interactions. Each gimbal design includes a ramp... Agent: Stephen B. Ackerman

20080030901 - System and method for a subambient pressure air bearing slider utilizing negative pressure grooves: A system and method are disclosed for a subambient pressure air bearing slider utilizing negative pressure grooves. In one embodiment, a groove extends from a slider's leading edge, splits, and terminates in two locations at the slider's trailing edge. In one embodiment, a groove is provided in a slider's compression... Agent: Kenyon & Kenyon LLP

20080030902 - Disk media and disk media manufacturing method: A disk media has an IC chip which is mounted thereon at a boundary peripheral portion of a metal film layer formation region with respect to a metal film layer non-formation region. The IC chip is mounted on a top surface of the metal film layer. An “L”-shaped slit is... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20080030903 - Suspension having stress absorbing structure, head gimbal assembly and disk drive unit with the same: A suspension for a head gimbal assembly comprises a flexure having a suspension tongue formed at its one end along length direction thereof for mounting a slider thereon. The suspension tongue has at least one partially hollowed stress absorbing structure for absorbing stress generated on the suspension tongue. The stress... Agent: Nixon & Vanderhye, PC

20080030904 - Rotational micro-actuator, hga with such micro-actuator and the method for manufacturing the hga: A rotational micro-actuator (20) used in hard disk driver is disclosed. It comprises a frame (21) approximately in the shape of letter “S” and PZT pieces (28, 29) attached to said frame (21), wherein said frame (21) is formed with a central coupling portion (213) by which the micro-actuator (20)... Agent: Workman Nydegger

20080030905 - Perpendicular magnetic recording head including heating element: A perpendicular magnetic recording head includes a read part disposed on a substrate to read magnetic recording information from a recording medium by a magnetoresistance effect; a write part disposed above the read part to record magnetic information on the recording medium by applying a perpendicular magnetic field, and including... Agent: Brinks Hofer Gilson & Lione

20080030907 - Tunneling magnetic sensing element including enhancing layer having high fe concentration in the vicinity of barrier layer and method for manufacturing tunneling magnetic sensing element: A tunneling magnetic sensing element is provided, in which an increase in the magnetostriction of a free magnetic layer is reduced and the rate of change in resistance is high. A laminate T1 constituting the tunneling magnetic sensing element includes a portion in which a pinned magnetic layer, a barrier... Agent: Brinks Hofer Gilson & Lione

20080030906 - Magnetoresistive effect element and magnetic memory device: A magnetoresistive effect element comprises a first magnetic layer having a pinned magnetization direction, and a second magnetic layer having a magnetization direction changed corresponding to an outside magnetic field. A resistance state is changed corresponding to the magnetization direction of the second magnetic layer corresponding to the magnetization direction... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20080030908 - Magnetoresistive effect element, thin-film magnetic head, method for manufacturing magnetoresistive effect element, and method for manufacturing thin-film magnetic head: A magnetoresistive effect (MR) element, a thin-film magnetic head having the MR element, a method for manufacturing the MR element, and a method for manufacturing the thin-film magnetic head are disclosed. The MR element, which uses electric current in a direction perpendicular to layer planes, includes a lower electrode layer,... Agent: Frommer Lawrence & Haug

20080030909 - Electric field read/write head and method of manufacturing same and data read/write device: An electric field read/write head, a method of manufacturing the same, and a data read/write device including the electric field read/write head are provided. The data read/write device includes an electric field read/write head which reads and writes data to and from a recording medium. The electric field read/write head... Agent: Sughrue Mion, PLLC