|Dynamic magnetic information storage or retrieval patents - Monitor Patents|
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Dynamic magnetic information storage or retrieval July category listing 07/09Below 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. 07/30/2009 > patent applications in patent subcategories.
20090190244 - Apparatus, system, and method for dynamic tape stick and tape break detection: An apparatus, system, and method are disclosed for dynamic tape stick and tape break detection. A first counter increments a first count and resets a second count in response to a sensor pulse from a first sensor of a first tape servo. A second counter increments the second count and... Agent: Kunzler & Mckenzie
20090190245 - Head evaluation method, magnetic storage apparatus and computer-readable storage medium: A head evaluation method obtains a first measured result indicating a change in read data, by writing data on and reading data from the disk rotated at a first speed, and reading the data from the disk rotated at a second speed higher than the first speed while maintaining a... Agent: Greer, Burns & Crain
20090190246 - Method of reading data stored in a data storage device and data storage device that performs a data read retry operation: A disk drive includes a disk having a track that includes a data sector divided by a servo sector so that a first data sector portion is on a first side of the servo sector, and a second data sector portion is on a second side of the servo sector.... Agent: Volentine & Whitt PLLC
20090190247 - Overshoot duration range selection in a hard disk drive: A hard disk drive that stores data on a disk. An overshoot duration is used to write data onto the disk. The value of the overshoot duration is a function of the data rate, which can vary for different areas of the disk. For example, the data rate can be... Agent: Irell & Manella LLP
20090190248 - 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.
20090190249 - Method and apparatus for efficient storage and retrieval of multiple content streams: Embodiments of the present invention provide disk controller operable to facilitate the efficient storage and retrieval of multiple content (data) streams to magnetic disk media. This disk controller includes an interface module, a memory module, and a processing module. The interface module is operable to couple the disk controller to... Agent: Garlick Harrison & Markison
20090190250 - Robust lpos detection with predictor and bit verifier: A tape drive system which includes the ability to reliably reproduce LPOS information even if both of the servo channels of the tape drive system could not detect the LPOS information due to defects. The system recognizes that an LPOS sequence is sequentially incremented by one if a tape is... Agent: Hamilton & Terrile, LLP IBM Tucson
20090190251 - Data recording method: A recording method for a disk device includes the following steps. Sequential data is written into the medium along the track in a predetermined radial direction. Information indicating an end position along the track where the end of the sequential data is written into is stored. The information is read... Agent: Greer, Burns & Crain
20090190252 - Magazine-based data cartridge library: The present invention provides a magazine-based data cartridge library that, in one embodiment, comprises a plurality of shelves that are capable of holding a plurality of data cartridge magazines, one or more drives, a magazine transport for moving magazines within the cabinet, and a cartridge transport for moving data cartridges... Agent: Hiscock & Barclay, LLP
20090190253 - Motor mount for interference suppression in a hard disk drive: A method for manufacturing a hard disk drive is described. The method includes providing a motor assembly, the motor assembly comprising a stationary portion and a rotatable portion for rotating a magnetic disk with respect to said stationary portion and providing a base for receiving the motor assembly. The method... Agent: Hitachi C/o Wagner Blecher LLP
20090190254 - Micromachined mover: A micromachined mover includes a rotor substrate and a stator substrate. A suspension is configured to couple the rotor substrate to the stator substrate and allow relative movement therebetween in a plane of the substrates. The suspension is positioned on an interior portion of the substrates.... Agent: Seagate Technology LLC C/o Westman, Champlin & Kelly, P.A.
20090190255 - Method and for wide track erasure in a hard disk drive: A hard disk drive is disclosed with a slider including a wide track eraser for erasing neighboring tracks and the servo patterning around a track on the accessed disk surface. Using the wide track eraser reduces the time to erase a disk surface by at least a factor of N,... Agent: Gregory Smith & Associates
20090190257 - Magnetic head and method of manufacturing therefor: A magnetic head includes a magnetic pole for writing. The magnetic pole is formed by laminating a first magnetic layer and a second magnetic layer so as to sandwich a write gap on the magnetic pole end side. The second magnetic layer is formed to be laminated on the write... Agent: Greer, Burns & Crain
20090190256 - Single pole tip write head design for perpendicular recording media having reduced dependence on soft underlayers: A thin film, perpendicular write head for use with recording media with or without a soft under layer is disclosed. The present invention comprises an tapered auxiliary pole, situated below the main write pole and separated from the write pole by a lower non-magnetic gap. The auxiliary pole alleviates problems... Agent: D'arcy H. Lorimer
20090190258 - Reader including an interposer that prevents coupling with write-protected data cartridges: A removable hard disk drive storage system includes a data storage cartridge having a write protect switch, and a reader configured to couple to and read data from the data storage cartridge. The reader includes a physical block that aligns with the write protect switch of the data storage cartridge.... Agent: Eric D. Levinson Imation Corp. Legal Affairs
20090190259 - Magnetic tape security: A tape cartridge includes a housing and a length of magnetic tape disposed within the housing. Additionally, the tape cartridge includes at least one cartridge memory chip disposed within the housing and at least one RFID reader operably connected to at least one of the cartridge memory chips and configured... Agent: Konrad Raynes & Victor, LLP. Attn: Ibm37
20090190260 - Head suspension and head suspension assembly and storage apparatus: A head slider is mounted at the mounting area on a plate-shaped gimbal in a head suspension. A swelling is formed on the load beam. A viscoelastic body is interposed between the load beam and the gimbal. The back surface of the gimbal is received on the swelling. The head... Agent: Greer, Burns & Crain
20090190261 - Magnetic head suspension: A load bending part includes a pair of first elastic plate parts and a second elastic plate part. The pair of first elastic plate parts are elastically deformed in a bended manner so as to generate a first pressing load. The second elastic plate part is positioned between the pair... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.
20090190262 - Magnetoresistive element and method of manufacturing the same: A magnetoresistive element includes a magnetoresistive film including a magnetization pinned layer, a magnetization free layer, an intermediate layer arranged between the magnetization pinned layer and the magnetization free layer, a cap layer arranged on the magnetization pinned layer or on the magnetization free layer, and a functional layer formed... Agent: Nixon & Vanderhye, PC
20090190263 - Substrate for suspension, and production process thereof: A substrate for suspension which is produced at low costs and can sufficiently attain the prevention of damage by electrostatic discharge and restraint of noises. The substrate for suspension includes: a metallic substrate, an insulating layer formed on the metallic substrate and having an opening from which the metallic substrate... Agent: Ladas & Parry LLP
20090190264 - Magnetoresistive element and method of manufacturing the same: A magnetoresistive element includes a magnetoresistive film including a magnetization pinned layer, a magnetization free layer, an intermediate layer arranged between the magnetization pinned layer and the magnetization free layer, a cap layer arranged on the magnetization pinned layer or on the magnetization free layer, and a functional layer arranged... Agent: Nixon & Vanderhye, PC
20090190265 - Hard disk drive: A hard disk drive (HDD) includes a base including a voice coil motor (VCM) which drives an actuator, a cover combined with an upper surface of the base, and a magnetic leakage flux reducer adjacent to the VCM to reduce a magnetic leakage flux leaked from the VCM. Therefore, the... Agent: Stanzione & Kim, LLP
20090190266 - Magnetic disk drive and voice coil motor: Embodiments of the present invention help to reduce out-of-plane excitation force exerted on a coil in a voice coil motor of a magnetic disk drive, so that vibration of a magnetic head is suppressed. According to one embodiment, a voice coil motor has a flat magnet that faces a coil,... Agent: Townsend And Townsend And Crew LLP
20090190267 - Ruti as a seed layer in perpendicular recording media: A method for reducing thin film media layer thickness while maintaining adequate magnetic recording performance includes providing a substrate comprising a rigid support structure, depositing a soft underlayer on top of the substrate, depositing an interlayer on top of the soft underlayer and depositing a exchange break layer on top... Agent: Kunzler & Mckenzie
20090190270 - Magneto-resistive effect device of the cpp type, and magnetic disk system: The invention provides a magnetoresistive device with the CPP (current perpendicular to plane) structure, comprising a nonmagnetic intermediate layer, and a first ferromagnetic layer and a second ferromagnetic layer stacked and formed with said nonmagnetic intermediate layer interposed between them, with a sense current applied in the stacking direction, wherein... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.
20090190268 - Magnetoresistive device of the cpp type, and magnetic disk system: A magnetoresistive device of a CPP (current perpendicular to plane) structure includes a magnetoresistive unit sandwiched between a first substantially soft magnetic shield layer from below, and a second substantially soft magnetic shield layer from above, with a sense current applied in a stacking direction. The magnetoresistive unit includes a... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.
20090190269 - Self-aligned coplanar structure for narrow-track emr devices and a method for producing the same: An extraordinary magnetoresistive sensor (EMR sensor) having a lead structure that is self aligned with a magnetic shunt structure. To form an EMR sensor according to an embodiment of the invention, a plurality of layers are deposited to form quantum well structure such as a two dimensional electron gas structure... Agent: Zilka-kotab, PC- Hit
20090190272 - Magnetoresistive device of the cpp type, and magnetic disk system: The invention provides a magnetoresistive device with the CPP (current perpendicular to plane) structure, comprising a magnetoresistive unit, and a first shield layer and a second shield layer located and formed such that the magnetoresistive unit is sandwiched between them, with a sense current applied in a stacking direction, wherein... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.
20090190271 - Magnetoresistive element and magnetic head: An MR element includes a first ferromagnetic layer, a second ferromagnetic layer, a spacer layer disposed between the first and second ferromagnetic layers; and an antiferromagnetic layer disposed on a side of the first ferromagnetic layer farther from the spacer layer. The antiferromagnetic layer is disposed away from a detection... Agent: Oliff & Berridge, PLC07/23/2009 > patent applications in patent subcategories.
20090185305 - Method and system for servo track write: A servo track writing method and a servo track write system of a hard disk drive (HDD) using the servo track write method. The servo track writing method includes performing a reference check (R/C) on a first servo pattern which is pre-written on a first surface of a disk, and... Agent: Stanzione & Kim, LLP
20090185306 - Gap servo control method and apparatus in near-field optical disc drive: A gap servo control method and apparatus for increasing a disturbance cancellation capability and decreasing the occurrence of an overshoot in a near-field optical disc drive include: generating an actuator driving signal of a transient response process by using a signal obtained by removing a disturbance contained in the gap... Agent: Stein Mcewen, LLP
20090185307 - Fly height detection during write operation: A hard disk drive that includes a head that is coupled to a disk. The head has a flying height and an inductance. The disk drive also includes a circuit that detects a change in the flying height by sensing a change of head inductance. The circuit can inhibit a... Agent: Irell & Manella LLP
20090185308 - Magnetic recording medium, recording reproducing apparatus, and stamper: On a magnetic recording medium, M sets of burst patterns are formed along a direction of rotation of a substrate in each burst pattern region, where M is a natural number of two or higher. Each burst pattern is formed so as to include two types of burst signal units... Agent: Greenblum & Bernstein, P.L.C
20090185309 - Method for minimizing contaminant levels within a tape drive system: A method for minimizing dust level within a tape drive system is disclosed. A dust concentration level within the tape drive system is initially determined. A head brush interval is subsequently adjusted according to the determined dust concentration level within the tape drive system.... Agent: Dillon & Yudell, LLP
20090185310 - Method for providing contaminant prevention and removal from a tape drive system: A method for preventing dust from entering a tape drive system is disclosed. Initially, a cooling fan is allowed to rotate in one direction to provide airflow to the tape drive system. In response to a detection of a loading or unloading of a tape cartridge or a head brush... Agent: Dillon & Yudell, LLP
20090185311 - Multiple access hard disk: Multiple access hard disk. Multiple read-write heads are implemented within a single information storage device. The information storage device can be any of a variety of information storage devices including a hard disk drive (HDD), a CD-ROM (Compact Disc Read Only Memory) drive, a DVD (Digital Video Disc or Digital... Agent: Garlick Harrison & Markison
20090185312 - Information storage devices using magnetic domain wall movement: Information storage devices are provided. An information storage device includes a track including at least one Co alloy layer and a soft magnetic layer. The track further includes a plurality of magnetic domains. A current applying element is connected to the track. The track includes a plurality of layers stacked... Agent: Harness, Dickey & Pierce, P.L.C
20090185313 - Hard disk drive: A hard disk drive includes a magnetic retractor situated at and integrated with the pivot holder of a head stack assembly. An actuator arm of the head stack assembly supports a read/write head, a bobbin supports a voice coil of a voice coil motor, and the actuator arm and bobbin... Agent: Volentine & Whitt PLLC
20090185315 - Magnetic sensor including a free layer having perpendicular to the plane anisotropy: A magnetic sensor includes a reference layer having a first magnetization direction and a free layer assembly having an effective magnetization direction substantially perpendicular to the first magnetization direction and substantially perpendicular to a plane of each layer of the free layer assembly. A spacer layer is between the reference... Agent: Kinney & Lange, P.A.
20090185314 - Thin-film magnetic head with grooves on medium-opposed surface and manufacturing method of the head: Provided is a thin-film magnetic head that can be adequately contacted with the magnetic recording medium, and thus, can perform read and write operations sufficiently and stably. This head comprises: at least one magnetic head element for reading and/or writing data, formed on/above an element formation surface of a substrate;... Agent: Oliff & Berridge, PLC07/16/2009 > patent applications in patent subcategories.
20090180206 - Magnetic transfer apparatus, magnetic transfer method and magnetic recording medium with magntic information transferred thereto: A magnetic transfer apparatus and method includes air supply for supplying air into a space above a peripheral portion of a double-sided slave disc beyond a second master disc in an air-tight chamber formed when a first disc holder holding a first master disc and the slave disc in contact... Agent: Young & Thompson
20090180207 - Hard disk drive and method of controlling auto reassign of the same: A method of controlling auto reassign of a hard disk drive, including measuring a position error signal (PES) value from at least one sample track of a disk when a fault is generated in a recording and reproduction process of the hard disk drive, comparing the measured PES value and... Agent: Stanzione & Kim, LLP
20090180208 - Application specific processor based disk formatter: A disk formatter in a disk drive having a main control processor for performing functions relating to transfer of data between a host and at least one disk medium, includes a processor for obtaining sector information of a target sector on the disk medium and issuing commands for reading or... Agent: Greer, Burns & Crain
20090180209 - Information recording medium access device, and data recording method: When moving image data or the like is recorded into an information recording medium, such as a flash memory, in real time, an influence of locations of free recording areas upon the recording speed is suppressed to ensure the real time performance of the data recording. In an access apparatus,... Agent: Greenblum & Bernstein, P.L.C
20090180210 - Information storage devices using magnetic domain wall movement, methods of operating the same, and methods of manufacturing the same: Information storage devices using magnetic domain wall movement, methods of operating the same, and methods of manufacturing the same are provided. An information storage device includes a first magnetic layer, a heating unit and a magnetic field applying unit. The heating unit heats a first region of the first magnetic... Agent: Harness, Dickey & Pierce, P.L.C
20090180211 - Hard disk drive: A hard disk drive including an actuator arm to pivot across a disk and having a read/write head disposed at an end of the actuator arm to read data from the disk and to write data to the disk, and a crash stop to prevent the read/write head from being... Agent: Stanzione & Kim, LLP
20090180212 - Apparatus and method for writing and reading data to and from tape medium: The present invention enhances the capability to specify a recorded position of designated data, even when a tape medium is run at high speed. A controller of a tape drive includes: a data set generator for generating a data set; a metadata generator for generating metadata including the number of... Agent: Zilka-kotab, PC- Ibm
20090180213 - Magnetic recording medium, method for production thereof, and magnetic recording and reproducing drive: A discrete track-type magnetic recording medium (30) includes a nonmagnetic substrate (1), a magnetic recording track and a servo signal pattern that are provided on at least one side of the nonmagnetic substrate and a part (4) nonmagnetized through implantation (7) of ions from above a mask (6) having a... Agent: Sughrue Mion, PLLC
20090180214 - Tape cartridge with built-in reel motors: A tape cassette has a cassette housing with first and second tape reels retaining tape mounted inside the housing. First and second electric motors are also mounted within the cassette housing respectively driving the first and second reels.... Agent: Schiff Hardin, LLP Patent Department
20090180215 - Tunneling magnetoresistive effect element and spin mos field-effect transistor: A magnetoresistive effect element includes a first ferromagnetic layer, Cr layer, Heusler alloy layer, barrier layer, and second ferromagnetic layer. The first ferromagnetic layer has the body-centered cubic lattice structure. The Cr layer is formed on the first ferromagnetic layer and has the body-centered cubic lattice structure. The Heusler alloy... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.
20090180216 - Shunt for magnetoresistive transducer heads for electrostatic discharge protection: A magnetoresistive transducer head assembly includes a reader element, a writer element and a high impedance shunt electrically connecting the reader element and the writer element. The high impedance shunt provides a high impedance conductive path for maintaining electrostatic charge equipotential between the reader element and the writer element.... Agent: Kenneth L. Sherman, Esq. C/o Myers Dawes Andras & Sherman, LLP
20090180217 - Magneto-resistive effect device of the cpp type, and magnetic disk system: A magnetoresistive device comprising a magnetoresistive unit, an upper shield layer and a lower shield shield layer stacked such that the magnetoresistive unit is held between them. The magnetoresistive unit comprises a nonmagnetic metal intermediate layer, a first ferromagnetic layer and a second ferromagnetic layer stacked with the nonmagnetic metal... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.
20090180218 - Information storage devices using magnetic domain wall movement and methods of operating the same: An information storage device includes a magnetic layer configured to store information, a first and second conductive layer. The first conductive layer contacts a first end of the magnetic layer. The second conductive layer contacts a second end of the magnetic layer. The magnetic layer includes first and second pinning... Agent: Harness, Dickey & Pierce, P.L.C07/09/2009 > patent applications in patent subcategories.
20090174960 - Method and system for secure data storage: A method and system for secure data storage and retrieval is provided. A sequence of data units is divided into multiple subsets of data units corresponding to multiple data channels. The multiple data channels are assigned to multiple data writers based on a key code. Then, each subset of data... Agent: Kenneth L. Sherman, Esq. C/o Myers Dawes Andras & Sherman, LLP
20090174962 - Apparatus and method for slider-disk contact indication by monitoring the spindle control signal in a hard disk drive: A hard disk drive including an electrical property meter sensing a spindle control signal to create an electrical property reading. Spindle control signal stimulates spindle motor to rotate at least one disk, creating rotating disk surface accessed by slider. Control circuit receives electrical property reading to create contact indication of... Agent: Gregory Smith & Associates
20090174961 - Target of opportunity in an automated data storage library: A method is provided for utilizing target of opportunity to perform at least one special operation while a removable storage medium is mounted within a data storage drive for another purpose. A target of opportunity is recognized by determining if at least one special operation may be performed by the... Agent: International Business Machines Corporation
20090174964 - Servo channel for tape drive systems: Provided are techniques for synchronous servo channel for a data tape drive. A servo reader is configured to read servo bursts from a data tape. An anti-aliasing filter is operable to output a bandlimited signal and is coupled to receive a servo channel signal comprising servo bursts from the servo... Agent: Konrad Raynes & Victor, LLP. Attn: Ibm37
20090174963 - Tape-based data storage system and head enabling compounded reading rate: A tape-based data storage system according to one embodiment comprises a head having at least two modules, each of the modules having an array of readers and writers, wherein at least some of the writers in a first of the modules are aligned with at least some of the readers... Agent: Zilka-kotab, PC- Ibm
20090174965 - Data storage drive with target of opportunity recognition: A system and computer program product are provided for utilizing target of opportunity to perform at least one special operation while a removable storage medium is mounted within a data storage drive for another purpose. The system for recognizing a target of opportunity comprises a tape drive. The tape drive... Agent: International Business Machines Corporation
20090174966 - Swivel arm actuator for multiple directions of movement: The invention relates to a suspension arm actuator for a plurality of directions of motion, which comprises a suspension arm designed as a two-arm lever and supported against a support and mounted to said support such that it can be pivoted, said suspension arm supporting on one of its lever... Agent: Thomson Licensing LLC
20090174967 - Filled patterned magnetic head: In one embodiment, a magnetic head includes a substrate having a media support surface; a gap coupled to the substrate, the gap having at least one of a magnetoresistive (MR) sensor and a writer; a closure coupled to the gap on a side thereof opposite the substrate, said closure forming... Agent: Zilka-kotab, PC- Ibm
20090174968 - Magnetic sensing device with reduced shield-to-shield spacing: A magnetic sensor assembly includes first and second shields each comprised of a magnetic material. The first and second shields define a physical shield-to-shield spacing. A sensor stack is disposed between the first and second shields and includes a seed layer adjacent the first shield, a cap layer adjacent the... Agent: Kinney & Lange, P.A.
20090174969 - Magnetic recording medium, magnetic signal reproduction system and magnetic signal reproduction method: The present invention relates to a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support, wherein the magnetic layer has a thickness δ ranging from 10 to 80 nm, a product, Mrδ, of a residual magnetization Mr of the magnetic layer... Agent: Sughrue Mion, PLLC
20090174970 - Magnetic recording medium, magnetic signal reproduction system and magnetic signal reproduction method: The present invention relates to a magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support. The magnetic layer has a thickness ranging from 30 to 130 nm,... Agent: Sughrue Mion, PLLC
20090174971 - Cpp-type magneto resistive effect element having a pair of magnetic layers: A magnetoresistance effect element comprises: a pair of magnetic layers whose magnetization directions form a relative angle therebetween that is variable depending on an external magnetic field; and a crystalline spacer layer sandwiched between the pair of magnetic layers; wherein sense current may flow in a direction that is perpendicular... Agent: Knobbe Martens Olson & Bear LLP07/02/2009 > patent applications in patent subcategories.
20090168212 - Dynamic test glide head calibration using laser adjustment: Methods and apparatus for the calibration and use of test glide head gimbal assemblies are disclosed. Calibration is performed by pulse laser adjustment of the flexure mounted to the glide head, while the head is flying above a media test disk having asperities of known dimensions. The calibration process normalizes... Agent: D'arcy H. Lorimer
20090168215 - Test components fabricated with large area sensors used for determining the resistance of an mr sensor: Test methods and components are disclosed for testing resistances of magnetoresistance (MR) sensors in read elements. Test components are fabricated on a wafer with a first test lead, a test MR sensor, and a second test lead. The test leads and test MR sensor are fabricated with similar processes as... Agent: Duft Bornsen & Fishman, LLP
20090168216 - Test components fabricated with pseudo sensors used for determining the resistance of an mr sensor: Test methods and components are disclosed for testing resistances of magnetoresistance (MR) sensors in read elements. Test components are fabricated on a wafer with a first test lead, a pseudo sensor, and a second test lead. The test leads and MR sensor are fabricated with similar processes as first shields,... Agent: Duft Bornsen & Fishman, LLP
20090168217 - Test-device system for independent characterization of sensor-width and sensor-stripe-height definition processses: A test-device system and method for deconvoluting measurements of effects of a sensor-width definition process from measurements of effects of a sensor-stripe-height-definition process in a manufacture of a magnetic sensor. The test-device system comprises a first test device for generating data to characterize a sensor-width-definition process. The test-device system also... Agent: Hitachi C/o Wagner Blecher LLP
20090168214 - Verification of a fabrication process used to form read elements in magnetic heads: Test methods and components are disclosed for testing the quality of a fabrication process used to form read elements in magnetic heads. A wafer is populated with one or more test components along with magnetic heads. The test components are formed by the same or similar fabrication processes as the... Agent: Duft Bornsen & Fishman, LLP
20090168213 - Verification of a ground connection fabrication process for esd resistors in magnetic heads: Test methods and components are disclosed for testing the quality of the ground connection fabrication process for ESD shunt resistors in magnetic heads. A wafer is populated with one or more test components along with magnetic heads. The test components are fabricated with ESD shunt resistor ground connections created by... Agent: Duft Bornsen & Fishman, LLP
20090168218 - Disk drive device and servo write method: According to one embodiment, a servo write module is configured to write radial servo patterns on the disk media using a first spiral servo pattern of the spiral servo patterns as a base pattern for tracing, to detect a shift amount of a sync mark position in each of other... Agent: Knobbe Martens Olson & Bear LLP
20090168219 - Methods and apparatus for writing servo frames to and/or verifying data areas of a storage medium: Methods and apparatus are disclosed for writing and verifying servo frames written on a storage medium, for verifying data areas of a storage medium, and for writing and verifying servo frames and data areas of a storage medium. In one example, the writing of at least a portion of a... Agent: Pillsbury Winthrop Shaw Pittman, LLP
20090168220 - Thermally assisted magnetic head and manufacturing method of same: When first and second near-field light-generating portions are irradiated with laser light or other energy rays, near-field light is generated at the tips of both the near-field light-generating portions. By means of the near-field light thus generated, a magnetic recording medium opposing the medium-opposing surface is heated, and the coercivity... Agent: Oliff & Berridge, PLC
20090168221 - Method and system for detecting a change in a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk: A method according to one embodiment comprises detecting a change in a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk, the change being caused by head-disk contact. A method for detecting head-disk contact according to another embodiment comprises measuring a rotational velocity of a... Agent: Zilka-kotab, PC- Hit
20090168222 - Correcting a track pitch error with a subsequent servo-write pass: A method for correcting a track pitch error in servo tracks written on a magnetic recording media coupled with a disk surface, by using a subsequent servo-write pass, comprises propagating servo tracks across the magnetic recording media in a previous servo-write pass. The servo tracks have radial positioning servo code.... Agent: Hitachi C/o Wagner Blecher LLP
20090168225 - Disk drive device and head positioning control method: According to one embodiment, a disk drive includes a detection signal producing module configured to produce a detection signal by reading each of the spiral servo patterns, the spiral servo patterns being read by a head while the head scans a circumferential direction region on the disk media. A position... Agent: Knobbe Martens Olson & Bear LLP
20090168224 - Method and apparatus for offset control in a disk drive: According to one embodiment, there is provided a disk drive that can perform dynamic offset control (DOC). The disk drive has a magnetic head, a disk, and offset calculating modules. The magnetic head has read head. Offset-measuring position data is written in a non-servo area provided in the disk. The... Agent: Knobbe Martens Olson & Bear LLP
20090168223 - Servo track writer clockhead radius jig: A servo track writer (STW) clockhead radius jig is disclosed. One embodiment provides a hard disk drive assembly including a base having a cutaway portion to provide visual access therein. In addition, a disk is mounted in the hard disk drive assembly, this disk having an indicator thereon to indicate... Agent: Hitachi C/o Wagner Blecher LLP
20090168226 - Repair of defective servo tracks: A method for repairing at least one defective servo segment of a servo sector having at least one defective servo track written on a magnetic recording media. The method comprises mapping the magnetic recording media for locations of the defective servo segment of the servo sector. A non-defective segment of... Agent: Hitachi C/o Wagner Blecher LLP
20090168228 - Disk drive having a disk of discrete-track media type: According to one embodiment, a disk drive has a DTM type disk. The DTM type disk has a servo area on one recording surface. In the servo area, a servo pattern is recorded. The servo pattern is composed of a projection-depression pattern and an N- and P-pole magnetic pattern. The... Agent: Knobbe Martens Olson & Bear LLP
20090168227 - Distributed track identifier on a hard disk drive: A magnetic disk for a hard disk drive comprising a distributed track identifier is described. The disk includes a first portion of a track identifier physically located at a first location on a disk sector and a second portion of the track identifier physically located at a second location on... Agent: Hitachi C/o Wagner Blecher LLP
20090168231 - Method and apparatus for reproducing servo data from a discrete track media in a disk drive: According to one embodiment, disclosed herein is a disk drive that has a disk of discrete-track media (DTM) type. The DTM disk has servo regions. Each servo region has dividing grooves and non-servo data parts. Each dividing grooves extends along the centerline of any projecting region having a width larger... Agent: Pillsbury Winthrop Shaw Pittman, LLP
20090168230 - Mixed format disk drive: A magnetic disk for a hard disk drive comprising a plurality of physical sector sizes is disclosed. The magnetic disk includes a first sector size area physically formatted according to a first physical sector size and a second sector size area physically formatted according to a second physical sector size... Agent: Hitachi C/o Wagner Blecher LLP
20090168229 - Servo patterns for self-assembled island arrays: Servo patterns and associated methods of fabricating servo patterns are described. For patterned storage media, data sectors and servo sectors may be patterned using self-assembly. In one embodiment, self-assembly is used to form a first array of islands and a second array of islands in servo sectors that are track-wise... Agent: Duft Bornsen & Fishman, LLP
20090168232 - Microactuator reference input limit to prevent internal states over-accumulation: A microactuator reference limit used to prevent over-accumulation of internal states may be set based on the microactuator's mechanical properties and is applied at the reference point to the microactuator servo subsystem. A microactuator variable input limit to prevent over-accumulation of internal states may be dynamically determined based on the... Agent: Hitachi C/o Wagner Blecher LLP
20090168233 - Manufacturing method of hermetic connection terminal used in a disk drive device having hermetically sealed enclosure and disk drive device: To efficiently manufacture a feedthrough used in a disk drive device having a hermetically sealed enclosure, embodiments of the present invention manufacture a feedthrough used in an HDD having a hermetically sealed enclosure. An embodiment of a manufacturing method of the present embodiment manufactures a columnar body, cuts the columnar... Agent: Townsend And Townsend And Crew LLP
20090168234 - Disk drive apparatus: According to one embodiment, a disk apparatus has a disk, a head, a carriage assembly, and a circulation filter provided at the corner of the base, located downstream of the head with respect to a rotating direction of the disk. A sidewall of the base has a confronting surface which... Agent: Knobbe Martens Olson & Bear LLP
20090168235 - Enhanced cpp read sensors with lateral spin transport: CPP read sensors and associated methods of fabrication are described that provide lateral spreading of a sense current along the length of an AFM layer of the read sensor. Winged regions (i.e., extended portions) are added to the layers of a CPP sensor stack to induce lateral spreading of the... Agent: Duft Bornsen & Fishman, LLP
20090168238 - Information storage medium using ferroelectric, method of manufacturing the same, and information storage apparatus including the same: Provided is an information storage medium using a ferroelectric, including a substrate having an amorphous crystal structure, an electrode layer formed on the substrate, and a ferroelectric layer in a (001) direction formed on the electrode layer.... Agent: Sughrue Mion, PLLC
20090168236 - Magnetic head for perpendicular recording having stepped wrap around shield with independent control of write pole track width and flare point dimensions: Methods and structures for the fabrication of a thin film, perpendicular recording write head are disclosed. The fabrication involves the deposition of two different oxide layers which have mutually high etch selectivities. This characteristic allows a write pole structure to be built wherein the track width is independent of the... Agent: D' Arcy H. Lorimer
20090168237 - Perpendicular magnetic recording writer main pole having imbedded non-magnetic core and de-coupled pole tip: Methods and structures for the fabrication of a thin film, perpendicular recording write head are disclosed. The structure provides a pole tip separated from a rear pole by a non-magnetic separation layer located adjacent the flare point. The rear pole contains an imbedded non-magnetic layer. The separated pole tip and... Agent: D'arcy H. Lorimer
20090168239 - Adjustable voice coil motor driver: A method of configuring a signal for controlling a voice coil motor (VCM) is disclosed. A voltage at an error amplifier of a VCM driver is accessed. A target value at the error amplifier is accessed. A difference value between the target value and the voltage is determined. An impedance... Agent: Hitachi C/o Wagner Blecher LLP
20090168240 - Perpendicular write head having a modified wrap-around shield to improve overwrite, adjacent track interference and magnetic core width dependence on skew angle: A magnetic write head for perpendicular magnetic data recording. The write head includes an wrap around trailing shield structure for improved write field strength, reduced skew related adjacent track interference and magnetic core width. The trailing wrap around shield includes a side shield that is separated from sides of the... Agent: Zilka-kotab, PC- Hit
20090168241 - Magnetic disk drive: m
20090168242 - Method for manufacturing a perpendicular magnetic write pole having a large bevel angle: A method for manufacturing a magnetic write head for perpendicular magnetic recording, the write head having a write pole with an increased bevel (taper) angle. The write pole is constructed by forming a mask structure over a magnetic write pole material, and then performing a combination of sweeping or rotation... Agent: Zilka-kotab, PC- Hit
20090168243 - Hard disk case: A hard disk case for installation in a computer case includes a support frame for installation of a hard disk drive, a base mounted to the support frame, and a handle. The handle has a pivoting end pivotally connected with the base, a first protrusion insertable in an insertion portion... Agent: Browdy And Neimark, P.l.l.c. 624 Ninth Street, Nw
20090168245 - Information recording medium, recording/reproducing apparatus, and stamper: Data track patterns and servo patterns are formed on an information recording medium by concave/convex patterns divided into ring-shaped regions that are concentric with the data track patterns. In the servo patterns, a unit convex length and a unit concave length along the direction of rotation increase in each ring-shaped... Agent: Greenblum & Bernstein, P.L.C
20090168244 - Magnetic recording medium, magnetic recording and reproducing apparatus, and method for manufacturing magnetic recording medium: The magnetic recording medium includes: a substrate; a recording layer formed in a predetermined concavo-convex pattern over the substrate, the concavo-convex pattern including a convex portion that serves as a recording element; and a filling portion that fills a concave portion between the recording elements. The filling portion comprises a... Agent: Oliff & Berridge, PLC
20090168246 - Hydrodynamic bearing device, spindle motor, and recording and reproducing apparatus: An annular groove is provided to the rotary portion and/or the fixed portion in a bearing seal portion, and its cross section has a shape approximated by an arc. The annular groove is such that the relationship between the groove width W in a direction following the surface constituting a... Agent: Wenderoth, Lind & Ponack L.L.P.
20090168247 - Magnetic head with embedded solder connection and method for manufacture thereof: A slider for magnetic data recording, the slider including a plurality of solder pads that are embedded into the head. The solder pads can be formed during the formation of read and/or write heads, and can each be contained within a cavity. These cavities can be photolithographically patterned so that... Agent: Zilka-kotab, PC- Hit
20090168248 - Head slider and disk drive device: Embodiments of the present invention help to adjust the recess depth of a head element portion of a head slider. In an embodiment of the present invention, in a test step in manufacturing an HDD, the HDD examines the recess depth of a head element portion and decreases and adjusts... Agent: Townsend And Townsend And Crew LLP
20090168249 - Flexure based shock and vibration sensor for head suspensions in hard disk drives: Systems and methods for flexure based shock and vibration sensor for head suspensions in hard disk drives. Specifically, this invention deals with operational shock and vibration management within a hard disk drive. In one implementation, the assembly includes a circuit embedded optical waveguide sensor that includes a flexible electrical circuit... Agent: Sughrue Mion, PLLC
20090168250 - Disk drive apparatus: According to one embodiment, a disk drive apparatus includes a base, a recording medium, a drive motor, a head, a carriage, and a latch mechanism. The latch mechanism includes a latch member, which is supported on the base to be movable between a latch position and a release position, and... Agent: Blakely Sokoloff Taylor & Zafman LLP
20090168251 - Disk drive apparatus: According to one embodiment of the invention, a disk drive apparatus includes a case, a disk-shaped recording medium, a drive motor, a head, a head actuator, and a latch mechanism configured to latch the head actuator and hold the head actuator at a retracted position when the head actuator receives... Agent: Knobbe Martens Olson & Bear LLP
20090168252 - Head stack assembly and disk drive apparatus provided with the same: According to one embodiment, a head stack assembly includes a bearing portion configured to be mounted with a maximum number of arms and a plurality of spacers, a smaller number of arms than the maximum number attached to the bearing portion and extending in the same direction from the bearing... Agent: Knobbe Martens Olson & Bear LLP
20090168253 - Method of making a magnetoresistive reader structure: A method of making a magnetoresistive sensor includes defining a track width of a magnetoresistive element stack of the sensor. Further, processes of the method enable depositing of hard magnetic bias material on each side of the stack. These processes may permit both milling of excess depositions of the material... Agent: Patterson & Sheridan, L.L.P.
20090168254 - Test device and method for measurement of tunneling magnetoresistance properties of a manufacturable wafer by the current-in-plane-tunneling technique: A combined manufacturable wafer and test device for measuring a tunneling-magnetoresistance property of a tunneling-magnetoresistance, sensor-layer structure. The combined manufacturable wafer and test device comprises a tunneling-magnetoresistance, sensor-layer structure disposed on a substrate. The combined manufacturable wafer and test device also comprises a plurality of partially fabricated tunneling-magnetoresistance sensors; at... Agent: Hitachi C/o Wagner Blecher LLP
20090168255 - Method of repairing the deterioration of magneto-resistive effect device: The invention provides a method for fixing up the deterioration of a magneto-resistive effect device. A hard disk system is provided in it with a head heating means for heating a thin-film magnetic head, and by that head heating means, a defective site of the magneto-resistive effect device, which occurs... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.
20090168261 - Head slider and magnetic storage device: A magnetoresistive element is located between a lower shielding layer and an upper shielding layer. The magnetoresistive element receives an electric current through the lower shielding layer and the upper shielding layer. A non-magnetic conductive layer is embedded in the insulating film between the slider body and the lower shielding... Agent: Greer, Burns & Crain
20090168258 - Hybrid, self aligned magnetic write head with a partially plated pole and method of producing same: A magnetic write head for perpendicular magnetic recording. The write head has a secondary flare point defined by magnetic structures that extend from the sides of the write pole, but not over the trailing edge of the write pole. The magnetic structures each have a front edge that defines the... Agent: Zilka-kotab, PC- Hit
20090168257 - Independent side shield and top shield throat height control for high linear density wrap around shield write head: A magnetic write head for perpendicular magnetic recording. The magnetic write head includes a write pole having a pole tip region and a flared region. The write pole also has a trailing, wrap-around magnetic shield that is separated from the sides of the write pole by a non-magnetic side gap... Agent: Zilka-kotab, PC- Hit
20090168260 - Layered return poles for magnetic write heads: Methods and structures for the fabrication of both thin film longitudinal and perpendicular write heads are disclosed. A unique feature of these write heads is the inclusion of layered return poles, which comprise alternating layers of 22/78 and 80/20 NiFe alloys. The alternating layers also vary in thickness, the 22/78... Agent: D'arcy H. Lorimer
20090168256 - Magnetoresistance (mr) read elements having an active shield: Read elements and associated methods of fabrication are disclosed. A read element as described herein includes a magnetoresistance (MR) sensor sandwiched between first and second shields. The read element uses the first shield as an active portion of the MR sensor. Instead of implementing an AFM pinning layer in the... Agent: Duft Bornsen & Fishman, LLP
20090168259 - Wafer level balanced capacitance design for magnetic heads: Embodiments of the invention provide methods, systems and apparatus for testing electronic components, and more specifically for testing magnetoresistive heads. A pair of top shield pads and a pair of bottom shield pads may be formed in a kerf region of a wafer on which magnetoresistive heads are formed. The... Agent: Patterson & Sheridan, L.L.P.
20090168262 - Magnetic head design having reduced susceptibility to electrostatic discharge from media surfaces: Methods and structures for the fabrication of a thin film, longitudinal and perpendicular recording heads are disclosed. The heads comprise a plurality of embedded static dissipative layers that extend a few nanometers from the air bearing surface. These extended layers are first to contact the magnetic media surface and drain... Agent: D'arcy H. Lorimer
20090168265 - Magnetic recording medium, magnetic signal reproduction system and magnetic signal reproduction method: The present invention relates to a magnetic recording medium comprising a magnetic layer comprising a hexagonal ferrite powder and a binder on one surface of a nonmagnetic support and a backcoat layer on the other surface of the nonmagnetic support. A power spectrum density at a pitch of 10 micrometers... Agent: Sughrue Mion, PLLC
20090168264 - Magnetoresistive element and magnetic head: In an MR element, first and second ferromagnetic layers are antiferromagnetically coupled to each other through a spacer layer, and have magnetizations that are in opposite directions when no external magnetic field is applied thereto and that change directions in response to an external magnetic field. The spacer layer and... Agent: Oliff & Berridge, PLC
20090168263 - Read transducer and magnetic storage system implementing same: A transducer according to one embodiment comprises a first ferromagnetic layer; a second ferromagnetic layer; and an electrically conductive layer positioned between the ferromagnetic layers; wherein a length of the first ferromagnetic layer in a first direction parallel to a plane of deposition thereof is greater than a length of... Agent: Zilka-kotab, PC- Hit
20090168266 - Magneto-resistive effect element, magnetic head, and magnetic recording/reading apparatus: Embodiments of the present invention provide a practical magneto-resistive effect element for CPP-GMR, which exhibits appropriate resistance-area-product and high magnetoresistance change ratio, and meets the demand for a narrow read gap. Certain embodiments of a magneto-resistive effect element in accordance with the present invention include a pinned ferromagnetic layer containing... Agent: Townsend And Townsend And Crew LLP
20090168269 - Current perpendicular to plane spin valve with high-polarization material in ap1 layer for reduced spin torque: A current perpendicular to plane magnetoresistive sensor having improved resistance amplitude change and reduced spin torque noise. The sensor has an antiparallel coupled pinned layer structure with at least one of the layers of the pinned layer structure includes a high spin polarization material such as Co2FeGe. The sensor can... Agent: Zilka-kotab, PC- Hit
20090168270 - Exchange-coupled element and magnetoresistance effect element: In comparison with conventional exchange-coupled elements, the exchange-coupled element of the present invention has greater unidirectional magnetization anisotropy. The exchange-coupled element comprises: an ordered antiferromagnetic layer; and a pinned magnetic layer being exchange-coupled with the ordered antiferromagnetic layer, the pinned magnetic layer having unidirectional magnetization anisotropy. The pinned magnetic layer... Agent: Greer, Burns & Crain
20090168271 - Dual-layer free layer in a tunneling magnetoresistance (tmr) element having different magnetic thicknesses: Tunneling magnetoresistive (TMR) elements and associated methods of fabrication are disclosed. In one embodiment, the TMR element includes a ferromagnetic pinned layer structure, a tunnel barrier layer, and a free layer structure comprised of dual-layers. The free layer structure includes a first free layer and a second amorphous free layer.... Agent: Duft Bornsen & Fishman, LLP
20090168267 - Current-perpendicular-to-plane (cpp) read sensor with multiple reference layers: A current-to-perpendicular-to-plane (CPP) read sensor with multiple reference layers and associated fabrication methods are disclosed. According to one embodiment of the invention, the multiple reference layers of a CPP tunneling magnetoresistance (TMR) read sensor includes a first reference layer formed by a ferromagnetic polycrystalline Co—Fe film, a second reference layer... Agent: Duft Bornsen & Fishman, LLP
20090168268 - Dedicated noncorrosive smear detector: A disk drive head slider for a magnetic disk drive is provided. The head slider includes a tunnel magnetic resistance device for reading data on a magnetic disk and a dedicated noncorrosive smear detector for measuring resistance wherein the resistance corresponds to a level of smear associated with the head... Agent: Hitachi C/o Wagner Blecher LLPPrevious industry: Optical: systems and elements
Next industry: Electricity: electrical systems and devices
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