Dynamic magnetic information storage or retrieval inventions 08/06

20060193070 - System, method, and apparatus for forming a patterned media disk and related disk drive architecture for head positioning: A solution to the problem of long, e-beam mastering times needed for patterning masters for patterned magnetic disk media is disclosed. A process for fabrication of masters takes advantage of the circular symmetry of magnetic disks and reduces the total required mastering time by an order of magnitude over prior...

20060193071 - Hidid preamp-to-host interface with much reduced i/o lines: The present invention achieves technical advantages as a Preamp enabled to use different functional blocks inside the Preamp only during their own “active” modes. When a block is “inactive”, its corresponding I/O's are put into the High-impedance (Hi-Z) state so that all of the other “inactive” blocks do not affect...

20060193072 - Information recording apparatus and method, magnetic disk producing apparatus and method, and magnetic disk: Address information/ID information is recorded to a magnetic disk whose recording tracks are formed of lands. There is provided an information recording apparatus for recording address information/ID information to an address information/ID information area of a magnetic disk having formed, in a direction from the central hole toward the outer...

20060193073 - Disk array unit: A disk array unit connected to a host unit to give information thereto and receive information therefrom. The disk unit includes a plurality of disk units for storing information transmitted from the host unit and a management information recording device, formed by utilizing information storage areas in the disk units,...

20060193074 - Data storage organization for distributed computing in an intelligent disk drive: An intelligent disk drive is described which includes means for executing distributed computing tasks including a CPU and associated memory. The communication interface with the host computer is modified to allow the host computer to send executable code for a task to the drive and to allow the drive to...

20060193077 - Disk drive control circuit and method: A servo control circuit provides seamless transition between seek and track modes while enabling both rapid seek mode operation and accurate tracking. The control circuit includes an analog-to-digital converter having a non-linear characteristic. The non-linear characteristic provides disproportionately large control voltages to derive speed and settling in the seek mode...

20060193076 - Magnetic disk drive to alleviate damage from thermal asperity: Embodiments of the invention prevent or alleviate head damage ascribable to the TA-causing sections (projections) of disks (TA is thermal asperity). With respect to a TA-causing section that has been detected during initial defect registration, X±A tracks in a radial direction and Y±B sectors (or Y±B bytes of space) in...

20060193075 - Method and apparatus for rejecting contact-induced disturbances: A method and apparatus for compensating for head-to-disk contact-induced disturbances in a hard disk drive is disclosed. The method includes determining topographical variations across a surface of a disk during the manufacturing or operation of the hard disk drive. Error signal variations that occur as a result of head-to-disk contact-induced...

20060193078 - Data storage libraries: A data storage library for the storage of a plurality of data storage media, the library including a Z-direction mechanism for raising and lowering the media within the library, the Z-direction mechanism comprising support means for a picker mechanism for inserting storage media into and withdrawing them from storage locations...

20060193079 - Spindle motor of a small-scale design: The spindle motor described herein comprises a rotor having a rotor hub and a shaft connected to the rotor hub, a cylindrical bearing sleeve having a central bore to accommodate the shaft and a collar disposed at the receiving aperture, a cup-shaped bearing housing closed at one end to accommodate...

20060193080 - Magnetic head having a hall effect sensor: A magnetic head has a sensor which employs the “Hall effect”. In one illustrative example, the sensor includes a generally planar body made of a semiconductor heterostructure; first and second contacts comprising first and second drains, respectively, which are formed over a first end of the body and spaced equally...

20060193081 - Two layer writer heater using writer as one current lead: A transducing device includes a writer having a pole tip region and a heater circuit. The heater circuit has a heating portion and a heater current return path. The heating portion has at least two branches positioned with respect to the writer so that current flowing through the at least...

20060193082 - Tape cartridge: A tape cartridge according to the invention includes: a main case; a display window opened on a part of an outer circumferential wall of the main case; and a selection piece placed inside the display window for preventing erroneous erase, wherein the selection piece integrally has a cylindrical section and...

20060193083 - Magnetic recording medium, recording/reproducing apparatus, and stamper: In a magnetic recording medium including a servo pattern region having a servo pattern formed of a concave/convex pattern having convex portions and concave portions and a data recording region, the region having a data track pattern, the concave portions are formed in an address pattern region of the servo...

20060193084 - Manufacturing method of head gimbal assembly with solder fillet and head gimbal assembly: Embodiments of the invention relate to making reconnection when a soldered connection fails in a head/slider used in a magnetic disk drive. In one embodiment, a solder mass deposited on a slider pad of a head/slider is separated from a lead pad and a solder ball connection is yet to...

20060193085 - Resonance control features for a head gimbal assembly: The present invention provides an interface for improving resonance control. The interface includes a first member having a first coupling portion, a mounting surface having a second coupling portion for coupling to the first coupling portion of the first member, and a raised engagement member located on at least one...

20060193086 - Micro-actuator, head gimbal assembly and disk drive unit with the same: A HGA of the invention includes a slider; a micro-actuator to adjust the position of the slider; and a suspension to load the slider and the micro-actuator. The micro-actuator includes two side arms; a load plate for supporting the slider, which is connected with at least one of the side...

20060193087 - Rotational pzt micro-actuator, head gimbal assembly, and disk drive unit with the same: A head gimbal assembly (HGA) for a disk drive unit that includes a micro-actuator, a slider and a suspension to load the slider and the micro-actuator. The micro-actuator includes a pair of actuator side arms, a PZT element extending between and connecting the actuator side arms; a rotatable plate positioned...

20060193088 - Integrated servo and read emr sensor: An integrated servo and read device implementing Extraordinary Magnetoresistive (EMR) sensors. In one embodiment, dedicated EMR sensors are employed: one for data reading and one for servo operations. The sensors are preferably configured in an abutted configuration. In addition to magnetic recording systems, the device is also useful in a...

20060193089 - Gmr sensors with strongly pinning and pinned layers: A giant magnetoresistance (GMR) sensor with strongly pinning and pinned layers is described for magnetic recording at ultrahigh densities. The pinning layer is an antiferromagnetic (AFM) iridium-manganese-chromium (Ir—Mn—Cr) film having a Mn content of approximately from 70 to 80 atomic percent and having a Cr content of approximately from 1...

20060187564 - Heat assisted magnetic recording head and heat assisted magnetic recording apparatus: A heat assisted magnetic recording head is provided, which can prevent an effect of a heat in a laser diode when a magnetic recording region is heated by a heating laser beam and which can reduce its size and weight. In the heat assisted magnetic recording head, a recording magnetic...

20060187565 - Magnetic disk drive with function assignment and manufacturing method therefor: Embodiments of the invention provide a disk drive that may perform part of a function assignment process without being connected to a special test apparatus. In one embodiment, servo data is written only into dedicated regions of a disk. A function assignment program is stored within the dedicated regions. When...

20060187566 - Spindle speed control using feed-forward estimation in a hard disk drive: A method is applied to reduce a range in variation of a target spin speed for a rotatable medium in a data storage device. The method includes rotating the rotatable medium at the target spin speed, determining an initial position of a head relative to a surface of the rotatable...

20060187567 - Motor driver and magnetic disc apparatus: When the drive current fed to a VCM 3 is large, a driver D2 is turned on, and a driver D3 is turned off so that the current detected by a current detection amplifier A1 is fed back based on the voltage across a detection resistor RS1. When the drive...

20060187569 - Servo track verification apparatus and servo writer: A servo track formed on a tape-like recording medium is verified. An input unit allows a user to input information. A tape drive unit causes the tape-like recording medium to run on a predetermined route. A measurement unit is provided adjacent to the predetermined route of the tape-like recording medium...

20060187568 - System and method to optimize track spacing on a rotatable media: Methods in accordance with embodiments of the present invention can be applied to self-servo write a disk in a hard disk drive device having a ramp positioned near an outer diameter of the disk. In one such embodiment, a first user track can be assigned based on an acquire track...

20060187570 - Method of detecting position of head for recording medium: A head is moved in a lateral direction on the boundary between a separation track and a recording track on a recording medium. The separation track isolates the adjacent recording tracks from each other. A variation is detected in the output supplied from the head based on the recording track....

20060187571 - Servo controller method and apparatus for high tracks per inch hard disk drives using a delay accomodating state estimator: The invention applies to servo controllers for at least the voice coil motor of a hard disk drive. Today, many control algorithms require 80 to 90 percent of the sampling period to complete their calculation of the next control, making computation time delay no longer negligible. The invention accommodates the...

20060187572 - Velocity control system for an actuator assembly: A method for generating a velocity command for an actuator assembly is provided. The actuator assembly includes an actuator arm, which is to move over a plurality of surfaces. The method begins by providing a compensation torque for each of the plurality of surfaces. A position of the actuator arm...

20060187573 - Sensor equipment guard: A sensor equipment guard is designed to fit over both the sensing mechanism and the sensor disk/switch while being coupled only to the sensing mechanism. The guard has a back section from which walls extend outward substantially perpendicular from the back and remains open behind the disk/switch. A connection mechanism...

20060187574 - Integral transformer junction module: A compact integral transformer-junction module combination suitable for use in junction modules and vaults in distribution circuits and in industrial and commercial circuits, comprising: a transformer, and a sectionalizing element comprising a plurality of primary bushings, wherein the sectionalizing element is combined with the transformer into a single unit, and...

20060187575 - Single reel tape cartridge having guide surface: In one example of one aspect of the invention, a single reel data storage cartridge is provided. The single reel data storage cartridge includes a housing having an access window and a reel rotatably disposed within the housing and having storage tape wound on the reel. A guide surface is...

20060187577 - Disk drive cover: The present invention is directed to a top cover for a hard disk drive. According to one embodiment of the present invention, a top cover for a hard disk drive is fabricated by stamping a steel sheet. The top cover is formed with a surface hardness of at least about...

20060187578 - Magnetic disk drive: For the purpose of letting through a magnetic flux which reverses the magnetization of the magnetic layer of the magnetic disk, a write element requires a predetermined sectional area. However, if a cross section of a magnetic pole is structured as the one having a large aspect ratio, the pole...

20060187576 - Overmold material and metal base interface design for leakage reduction in a disc drive: A base plate of a disc storage system including an interior and an exterior surface, an entrance hole passes between the two surfaces and a groove surrounds the entrance hole and reduces the passage of air along an interface between the exterior and the interior surfaces. The groove may be...

20060187579 - Stress relief features for an overmolded base: A base assembly for use in an airtight enclosure. The base assembly includes a metal stamped section and an overmold section formed adjacent to the metal stamped section. The overmold section includes at least one stress relief feature for eliminating distortion stresses exerted on the metal stamped section by the...

20060187580 - Magnetic recording head and method for high coercivity media, employing concentrated stray magnetic fields: In methods and arrangements for concentrating stray magnetic fields, a pair of permanent magnets is employed in combination with a magnetic flux circuit, the permanent magnets in the pair having respective magnetizations that are oriented oppositely to each other. The permanent magnets produce a stray magnetic field that adds to...

20060187582 - Electrical read head having high sensitivity and resolution power and method of operating the same: An electrical read head having high sensitivity and resolution power and a method of operating the same are provided. The electrical read head includes a core portion for recording/reading data on/from a recording medium and an electrode pad connecting the core portion to a power supply. A surface of the...

20060187581 - Magnetic head and method of manufacturing the same: A highly reliable magnetic head is provided where fluctuation in the form of the upper magnetic pole is prevented and recording density is improved. The magnetic head is equipped with a recording head where a lower tip magnetic pole and an upper tip magnetic pole are formed facing one another...

20060187583 - Apparatus for controlling slider fly height: The present invention provides a transducing device. The transducing device includes a transducing element. The transducing device further includes at least one heating element formed within the transducing device and spaced a sufficient distance from the transducing element to substantially reduce a temperature effect on the transducing element....

20060187584 - Magnetic head with a slider and a gimbal suspension structuring flexure: A magnetic head is provided that is formed by fixedly bonding a slider having a thin-film magnetic element on a flexure formed of metallic material which constitutes a gimbal suspension. The slider includes electrodes conducted to the thin-film magnetic head on an end surface thereof on a trailing side which...

20060187585 - Silicon slider for magnetic recording fabricated by an alkaline etch: A slider for use in a magnetic data recording system that is constructed from a Si wafer by a method that saves valuable wafer real estate by minimizing kerf related to the cutting of the wafer into slider rows. The sliders are produced from a (110) oriented Si wafer, and...

20060187586 - Method and apparatus for an improved magnetic head arm assembly: A system and method for an improved magnetic head arm assembly (HAA), reducing complexity of design and difficulty of manufacture, is disclosed....

20060187587 - Head suspension: A head suspension prevents a read element from electrostatic discharge damage without employing a static electricity remover, and at the same time, secures the frequency characteristics of a write signal. The head suspension has a load beam to apply load to a slider that writes and reads data to and...

20060187588 - Substrate for thin-film magnetic head and method of manufacturing the substrate: A thin-film magnetic head substrate according to the present invention includes: a ceramic base with a principal surface; and an undercoat film, which covers the principal surface of the ceramic base. An electrical/magnetic transducer is provided on the undercoat film. The substrate further includes an intermediate layer between the principal...

20060187589 - Magnetic recording medium: Provided is a magnetic recording medium capable of achieving high reproduction output in a short wavelength region. The magnetic recording medium comprises 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....

20060187590 - Read sensor with a uniform longitudinal bias stack: A read sensor with a uniform longitudinal bias (LB) stack is proposed. The read sensor is a giant magnetoresistance (GMR) sensor used in a current-in-plane (CIP) or a current-perpendicular-to-plane (CPP) mode, or a tunneling magnetoresistance (TMR) sensor used in the CPP mode. The transverse pinning layer of the read sensor...

20060187592 - Magnetoresistive film having reduced electric resistance: A soft magnetic layer is made of nickel iron alloy containing crystals of the face-centered cubic lattice and crystals of the body-centered cubic lattice. The face-centered cubic lattice serves to establish a soft magnetic property in the nickel iron alloy. The body-centered cubic lattice contributes to reduction in the electric...

20060187591 - Magnetoresistive sensor with a free layer stabilized by direct coupling to in stack antiferromagnetic layer: A magnetoresistive sensor having a free layer biased by an in stack bias layer that comprises a layer of antiferromagnetic material. The bias layer can be IrMnCr, IrMn or some other antiferromagnetic material. The free layer is a synthetic free layer having first and second magnetic layers antiparallel coupled across...

20060181796 - Disk-shaped magnetic recording medium: The present invention provides a disk-shaped magnetic recording medium in which a servo signal for tracking is recorded as a preformat by a magnetic transfer method. This disk-shaped magnetic recording medium facilitates the manufacture of a master disk which carries information to be transferred. The disk-shaped magnetic recording medium permits...

20060181797 - Information recording and reproducing apparatus and method, and signal decoding circuit for performing timing recovery: A timing recovery unit detects a phase offset and a frequency offset from a head area of reproduction data and initially corrects them. The timing recovery unit stores data in which a head reproduction signal has been made to be discrete by a fixed clock into a buffer. A phase...

20060181798 - Magnetic head for use in magnetic recording apparatus: A magnetic head for use in a magnetic recording apparatus for magnetically recording information in a state of heating and elevating the temperature of a recording portion of a recording medium by emitting electrons to the recording medium, the magnetic head including a recording magnetic pole having a magnetic surface...

20060181799 - Magnetic recording medium and magnetic storage apparatus: A magnetic recording method for recording information on a medium with a first magnetic layer, a second magnetic layer, and a non-magnetic coupling layer provided between the first and second magnetic layers so that these two layers are exchange-coupled and the first magnetic layer has an exchange coupling field Hex1...

20060181800 - Write once type recording medium, recording device and recording method for write once type recording medium, and reproduction device and reproduction method for write once type recording medium: A plurality of defect management areas (14A, 14B, 14C) are arranged on a write once type recording medium (10). Spare areas (12, 13) are divided into a plurality of partial spare areas (12A to 13B) and the defect list (21) is divided into partial defect lists (21A to 21D) so...

20060181801 - Tape-end sensor and a magnetic recording and reproducing apparatus having the same: A magnetic recording and reproducing apparatus includes a deck to which a head drum is mounted to record and reproduce information with respect to a running tape, and a tape-end sensor to sense starting and finishing ends of the running tape. The tape-end sensor includes a light emitter mounted on...

20060181802 - Locking device for tape cassette housing of tape recorder: A locking device for a tape cassette housing of a tape recorder comprises a locking recess and a locking protrusion respectively provided in sides of a tape cassette housing and a deck chassis and corresponding to each other, thereby fastening a tape cassette housing to the deck chassis, the tape...

20060181804 - Tape recording and reproducing apparatus: A damping member of a tape recording and/or reproducing apparatus, the apparatus having a main chassis and a capstan motor with a metallic substrate, wherein the damping member is removably provided to the main chassis to maintain a substantially constant spacing between the main chassis and the metallic substrate....

20060181803 - Tape recording system with coupled paired roller guides: A tape recording system is provided for coupling the angular velocities of a pair of roller guides disposed one on either side of a head assembly. In one embodiment, the roller guides each comprise cylindrical first and second surfaces wherein the first surfaces guide a tape over the head assembly....

20060181805 - Compact picker systems and methods for automated storage libraries: In one aspect of the invention, an apparatus for handling storage cartridges within an automated storage library is provided. In one example, the apparatus includes a frame, a translating member, e.g., a leadnut/leadscrew, and a finger mechanism slidably mounted to the frame. The translating member is operable to translate along...

20060181807 - Magnetic recording medium:

20060181806 - Reference head for use in a flexible data storage card: Reference heads for use in flexible data storage cards are disclosed. In one embodiment, a reference head includes a planar card surface for attachment to an interior housing surface of a flexible data storage card, and a non-planar reference surface opposite the planar card surface. In one embodiment, a non-symmetric...

20060181808 - Compact thin-film magnetic head and magnetic disk drive using the same: Embodiments of the invention provide a compact thin-film magnetic head capable of being increased in the number of terminals, and a magnetic disk drive that uses the thin-film magnetic head. In one embodiment, a thin-film magnetic head is constructed that has a magnetic response element, multiple connection object terminals, multiple...

20060181809 - Device and method for reading data from and writing data in storage medium: A disk device writes data in or reads data from a disk. The disk device includes a head. The head includes a reading element that reads data from the disk and a writing element that writes data in the disk. The reading element and the writing element are placed apart...

20060181810 - Flexure leg optimization shapes for lateral stiffness: Embodiments of the present invention include A head suspension assembly for a data storage device comprising a load beam and a Femto flexure coupled to the load beam, wherein the Femto flexure is a laminate structure comprising a support layer, the flexure comprising a plurality of symmetrical flexure legs, each...

20060181811 - Tolerance ring with debris-reducing profile: A tolerance ring for applications requiring cleanliness has contacting portions having a novel profile that reduces debris generation during installation of the tolerance ring while still providing adequate stiffness after installation. The tolerance ring is suitable for cylindrical interface applications where both a reduction in debris generation and high interface...

20060181812 - Method and apparatus coupling to a slider in a hard disk drive for microactuation: A region of flexure layer, including slider mounting face coupled to offset mounting face for at least one piezoelectric device. The offset mounting face for piezoelectric device provides asymmetry between first contact region and second contact region based upon notch and slot. This is cost effective, reliable support for piezoelectric...

20060181813 - Magnetic random access memory: A magnetic random access memory includes a magnetic recording element which includes a fixed layer whose magnetization direction is fixed, a recording layer whose magnetization direction changes, and a nonmagnetic layer provided between the fixed layer and the recording layer, the recording layer having a first running portion, a first...

20060181814 - Magnetoresistance effect element, magnetic head, magnetic reproducing apparatus, and magnetic memory: A magnetoresistance effect element comprises a magnetoresistance effect film including a magnetically pinned layer whose direction of magnetization is pinned substantially in one direction, a magnetically free layer whose direction of magnetization changes in response to an external magnetic field, and a nonmagnetic intermediate layer located between the pinned layer...

20060181815 - Novel structure/method to form bottom spin valves for ultra-high density: Two embodiments of a GMR sensor of the bottom spin valve (BSV) spin filter spin valve (SFSV) type are provided together with methods for their fabrication. In each embodiment the sensor includes an in-situ naturally oxidized specularly reflecting layer (NOL) which is a more uniform and dense layer than such...

20060176595 - Image recording apparatus: A recording medium of an image recording apparatus such as a digital camera is divided into multiple partitions, for each of which an access key such as a password is set to provide access security on a per-partition basis. Therefore, when multiple people share one recording medium, each person can...

20060176596 - Measuring and neutralizing the electrical charge at the interface of a magnetic head and media: A system and method for measuring and neutralizing the electrical charge at the interface of a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A surface treatment material is applied to the magnetic head. The surface treatment material matches the medium surface material on the...

20060176597 - Programmable write head drive de-gaussing circuit: A write head drive circuit for a magnetic data storage device is configured to drive a write head with a write head degaussing current that is applied at the end of a write cycle. The write head degaussing current is an alternating current waveform with a programmable number of current...

20060176598 - Data structure, data storage apparatus and method: Data stored on a tape in a plurality of data recording sessions employs tape drive apparatus programmed to record the data in accordance with a format specifying a log of tape-usage information. The log is in the form of a data structure including a plurality of log sections in which...

20060176599 - Magnetic recording disk drive with patterned media and compensation for write-clock timing error caused by rotational disturbances: A magnetic recording disk drive has a patterned magnetic recording disk with data blocks of magnetizable material separated by nonmagnetic regions, a write-clock-generation circuit for timing write pulses to the write head, and a rotational vibration sensor that adjusts the timing of the write pulses to correct for errors caused...

20060176600 - Water marking in a data interval gap: A storage device in which file data is divided into multiple blocks for storage on a recording medium. The storage device includes an additional data storing section for storing additional data to be recorded on the recording medium in association with the data to be written, a position determining section...

20060176601 - Apparatus and method for controlling remnant magnetization in a magnetic recording head: The present invention provides a magnetic writer. The magnetic writer comprises a write circuit, a write pole, a first write coil for inducing a first magnetic field in the write pole by a first current provided by the write circuit, and a second write coil for inducing a second magnetic...

20060176602 - Information-processing apparatus, information-processing method, programs and recording mediums: Attributes of data recorded on a magnetic tape are stored in an attribute information table saved in an MIC (Memory in Cassette) of a tape cassette accommodated in a tape streamer drive connected to a host computer. The attributes are recorded for every identifier used for identifying a recording unit...

20060176603 - Device, method, and program product for controlling a tape data storage drive: A device, method, and machine-readable medium program product for controlling a tape data storage drive are disclosed. According to one embodiment, a device is provided for controlling a tape drive operable with a tape storage medium, the device comprising a buffer memory and a first functional unit. In the described...

20060176604 - Magnetic disk drive with positioning accuracy: In one embodiment, the magnetic disk drive has a magnetic head, an actuator driving the magnetic head, and a control portion controlling a controlled object, including the magnetic head and the actuator, by creating a control signal based on a given target position signal and on a position signal played...

20060176605 - Low frequency disturbance compensation control device and disk drive using the same: A servo control device for a disk drive capable of effectively compensating for a low frequency disturbance incoming to the disk drive is provided. The servo control device includes: a state variable estimator calculating a position estimation error based on a control input for controlling motion of a head and...

20060176606 - Magnetic recording medium, recording/reproducing apparatus, and stamper: A servo pattern is formed in a servo pattern region on at least one surface of a substrate of a magnetic recording medium by a concave/convex pattern including a plurality of convex parts, at least protruding end parts of which are formed of magnetic material, and at least one concave...

20060176607 - Servo control method and apparatus suitable for the same: A servo control method of controlling a plant to track a reference trajectory with enhanced accuracy using a reference signal and its derivative signals, an apparatus and a recording medium suitable for same. The servo control method includes: determining a polynomial indicating a reference trajectory desired by a plant and...

20060176608 - Disc storage system component with integrally formed snubbers: A disc storage system component includes a deck and at least one snubber. The deck is configured for a disc to be rotatably mounted adjacent thereto. The at least one snubber is formed integrally with the deck and configured to block the disc from contacting the deck. This protects the...

20060176609 - Hard disk drive with structure for mounting voice coil motor: Embodiments of the invention provide a hard disk drive base adapted to prevent release of a strain due to the difference in thermal expansion between the voice coil motor and the base and thereby prevent a degradation in the positioning accuracy of the magnetic head. In one embodiment, a hard...

20060176610 - Magnetic disk drive with cover seal and method for fabricating same: Embodiments of the invention shorten a work time required for peeling off a cover seal during rework. In one embodiment, a magnetic disk drive includes: a base provided with a bonded surface around an opening edge and containing therein a head driving mechanism and a magnetic disk; a top cover...

20060176611 - Formed parts for adhesive height setting: Part gap spacers that are disposed between parts in a fluid dynamic bearing motor or hard disk assembly are provided herein. Part gap spacers are designed to off-set adjacent parts such that part-to-part spacing has less variation in tolerance accumulation. Part gap spacers also allow for greater control of bond...

20060176612 - Motor and recording disk driving device: A base plate is provided with plural through holes extending vertically through the base plate, at the portions aligned with plural teeth. In the respective through holes of the base plate, the lower portions of wire-wound portions of the corresponding teeth and the lower portions of the coils formed around...

20060176613 - Magnetic head: Provided is a magnetic head having a magnetic thin film structure that reduces the effect of a stray field and generates a magnetization reversal at a high speed. The magnetic head includes a first pole, a second pole spaced apart from the first pole, and an induction coil that induces...

20060176614 - Thin film magnetic head, method of manufacturing the same, and magnetic recording apparatus: A main magnetic pole layer is constructed so as to have a stacking structure in which a lower main magnetic pole layer having relative low saturated magnetic flux density and an exposed surface area is positioned on a leading side, and an upper main magnetic pole layer having relative high...

20060176615 - Magnetic head device having hook for mounting slider: A locking segment presses a slider towards a supporting member so that the slider is fixed to the supporting member. In the present invention, the slider is mechanically pressure-mounted to the supporting member without the use of an adhesive. This reduces the fluctuation of the distance between the slider and...

20060176616 - Magnetic head slider: On a disk-facing surface of a magnetic head slider, rail surfaces that are at the same height as a magnetic device surface and raised leading surfaces connect the magnetic device surface to the raised leading surfaces. Moreover, a central step surface at a level lower than the magnetic device surface...

20060176617 - Magnetic head assembly: Vibrations in a magnetic head assembly equipped with a magnetic head, caused by the effects of the flow of air arising from the high-speed rotation of a magnetic disk, can be suppressed by affixing a damping material to the magnetic head assembly. As a result, accurate positioning is possible with...

20060176618 - Composite thin-film magnetic head, magnetic head assembly and magnetic disk drive apparatus: A composite thin-film magnetic head includes a substrate; a first insulation layer laminated on the substrate; an MR read head element formed on the first insulation layer and provided with a lower shield layer, an upper shield layer and an MR layer in which a sense current flows in a...

20060176622 - Magnetoresistive sensor having a laminated hard magnet structure for free layer biasing: A magnetoresistive sensor having a novel laminated hard bias structure that possesses exceptional magnetic performance characteristics when deposited over a crystalline structure such as in a partial mill sensor design in which a portion of a sensor stack extends beyond the active area of the sensor. The hard bias structure...

20060176621 - Magnetoresistive sensor with free layer bias adjustment capability: A magnetoresistive sensor having a free layer biased by an in stack bias layer that has a magnetic moment canted with respect to the ABS, such that the magnetic moment of the biasing layer has a longitudinal component in a direction parallel with the ABS and a component in a...

20060176619 - Magnet tunneling junction with rf sputtered gallium oxide as insulation barrier for recording head: A magnetic tunneling junction device has a fixed ferromagnetic layer, a free ferromagnetic layer, and an insulating tunnel barrier layer made of gallium oxide. The insulating tunneling barrier layer is deposited by RF sputtering of gallium oxide. The magnetic tunneling junction device has a resistance area product less than 7...

20060176620 - Memory cell and programmable logic having ferromagnetic structures exhibiting the extraordinary hall effect: Memory cell structures make use of the extraordinary Hall effect (EHE) for increased data storage capacity. A memory cell has a ferromagnetic structure which includes at least a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer in between the first and the second ferromagnetic layers. The first...

20060171048 - Method and apparatus for managing information for editing recorded data: The present invention relates to editing data streams recorded in a recording medium. At the time of deleting an arbitrary navigation unit from a data stream partitioned by the navigation units and recorded in a recording medium, information is recorded in the recording medium, which, in a recording block including...

20060171049 - Method and apparatus for optimizing a prml data-receiving channel for data-storage systems: A method is provided for optimizing a PRML (Partial Response Maximum Likelihood) receiving channel for mass memory data receiving systems comprising an input receiving channel, a receiver placed downstream of the channel, a detector connected in cascade to the receiver, and a summing node being input both the receiver output...

20060171052 - Method of servo writing for magnetic recording system, magnetic recording system: In a method of servo writing of a magnetic recording system and the magnetic recording system, the signal is recorded in a dummy area with a higher recording density than the burst signal. Also, the maximum bit length of the burst area is shortened as compared with the maximum bit...

20060171051 - Modulation of sidewalls of servo sectors of a magnetic disk and the resultant disk: A discrete-track-recording (DTR) disk (also called “patterned” disk) has a sectored servo formed by modulation of its sidewalls in a predetermined manner, whereas sidewalls of data sectors are not modulated in this manner. Each servo sector has two side walls that are each respectively modulated in two different ways. Hence,...

20060171050 - Utilizing a combination of physical tracks and virtual tracks to store data on a data storage medium: A data storage system and a method for storing data in a data storage system are provided. The data storage system includes a data storage medium that has at least one physical track that stores at least a portion of manufacturing process data, and virtual tracks that store user data....

20060171053 - Data storage device, data storage control circuit, and control method for magnetic disk drive: Embodiments of the invention prevent erroneous writing/readout onto/from magnetic disks or other recording disks, even when data transfer between a controller such as an HDC, and a channel such as an R/W channel, and the read/write operation performed by the channel do not match each other in timing. In one...

20060171054 - Hi-speed preamplifier write driver for hard drive with improved symmetry: A write driver (38) produces balanced voltages across head (32) by using the input write data (WDX and WDY) drive transistors of a slower transistor type (typically PNP) on one half of an H-bridge configuration, while transistors of a faster transistor type (typically NPN) in the other half of the...

20060171056 - Method and apparatus for optimizing flying height control using heated sliders: A method and apparatus for optimizing flying height control using heated sliders is disclosed. A first heater is provided in a slider for implementing a first operating characteristic and a second heater is provided in the slider for implementing a second operating characteristic. A power source is provided for activating...

20060171057 - Method, medium, and apparatus for processing defects of an hdd: A reassigning method, medium, and apparatus for processing latent defects of a hard disc drive (HDD). The method of processing defects in an HDD may includes detecting latent defects that may develop into irrecoverable defects in the future, registering the detected latent defects in a temporary list, and replacing the...

20060171055 - Recording errors in tape drives: Exemplary tape library architectures and methods for recording errors in a tape drive are described. One exemplar method may be implemented in a processor a tape drive controller. The method comprises receiving, in a tape drive controller, an external identifier associated with a tape cartridge, recording the external identifier in...

20060171058 - Method to control spiral start point during ammonite servo track writer process using reference servo track band: a method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes writing a reference servo pattern onto a track of a disk. A head is then positioned relative to the reference servo pattern and a spiral servo track is written...

20060171059 - Window timing adjustment for spiral bursts: A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes writing a plurality of spiral servo signals with a head. The spiral servo signals are used to write servo patterns using at least one timing window. The timing window...

20060171060 - Piezoelectric crystal actuator and techniques for hysteresis reduction: The invention proposes the use of a piezoelectric crystal element as an actuator for data storage systems. In particular, the piezoelectric crystal element mechanically positions a head with respect to a data storage medium. More specifically, the invention may use a piezoelectric laminate crystal structure as a fine positioning actuator...

20060171061 - Seek error retry method of a disk device and disk device: In a disk device having a ramp-load mechanism, stable retry operation is performed even upon occurrence of seek errors. A disk device is provided with a ramp to which the head is retracted from the disk, at the time of seek error retry, prior to beginning seek retry, checks whether...

20060171062 - Method for secondary-actuator failure detection and recovery in a dual-stage actuator disk drive: A method for secondary-actuator failure-detection and recovery in a dual-stage actuator disk drive includes running a calibration test by the servo control processor and measuring the position of the secondary actuator relative to its neutral position in response to the calibration test. The secondary-actuator failure detection and calibration test can...

20060171063 - Seek servo control method for adapting to supply voltage variation and disk drive using the same: A seek servo control method and device for a disk drive device for performing seek servo control according to a variation in a power supply voltage for the disk drive. The seek servo control method includes: detecting a supply voltage for the disk drive; and adjusting a seek time according...

20060171064 - Method and apparatus for improved disk damper in a hard disk drive: The invention includes a disk damper containing an extended area located on the upstream side of the head stack assembly. The extended area is joined to a tail section. In the extended area, the disk damper provides a wall near the neighboring rotating disk surface that extends from the outside...

20060171065 - Hard disk drive with humidity control using membrane electrode assembly: In one embodiment, a magnetic disk drive is equipped with a mechanism that dehumidifies moisture through a passage or a moisture penetrating body that restrains the flow of water molecules within the magnetic disk drive by means of a membrane electrode assembly for electrolysis dehumidification....

20060171066 - Disk holder for off-line servo-track writer: A disk holder for an off-line servo-track writer is installed at a driving motor of the off-line servo-track writer in a state in which a plurality of disks for information storage are assembled to the disk holder. The disk holder has a flange for supporting the plurality of disks, a...

20060171067 - Method for controlling the formation of the trailing shield gap during perpendicular head fabrication and head formed thereby: A method for controlling the formation of the trailing shield gap during perpendicular head fabrication and head formed thereby are disclosed. The in-situ trailing shield gap deposition process removes the pre-sputter process that can damage the write pole material. Further, a seed pre-layer is formed on top of the trailing...

20060171068 - Perpendicular magnetic head and perpendicular magnetic disk apparatus: According to one embodiment, a perpendicular magnetic head has a write head including a main pole, a return yoke and a recording coil, a read head including a magnetoresistive film and a pair of shields arranged so as to sandwich the magnetoresistive film, and a soft magnetic film arranged so...

20060171070 - Magnetic recording head having solenoidal coil: A magnetic head includes a first magnetic layer in which a face, opposed to a recording medium, having a size equal to a track width in a track width direction; a second magnetic layer in which a face, opposed to the recording medium, having a size greater than the track...

20060171069 - P1 write pole with shoulder formation and method of fabrication: A magnetic disk drive head is disclosed including a write head, which includes a P1 layer having a pedestal portion, a gap layer formed on the P1 layer, and a P2 layer formed on the gap layer. The P1 layer includes a shoulder formation having a neck portion and a...

20060171072 - Perpendicular magnetic recording head, method of manufacturing the same, and magnetic recording apparatus: A perpendicular magnetic recording head capable of minimizing the possibility of erasing recorded information without intention at the time of recording information is provided. A pole layer has a structure in which a main pole layer disposed on a leading side and an auxiliary pole layer disposed on a trailing...

20060171071 - Soft magnetic film and thin-film magnetic head using the same: A soft magnetic film is formed of a CoFeNi alloy containing trace amounts of chlorine and sulfur as impurities. The stress of the soft magnetic film can be reduced effectively, specifically to 1,200 MPa or less, by adjusting the concentration ratio of chlorine to sulfur within the range from 1...

20060171073 - Thin-film magnetic head for perpendicular magnetic recording: A thin-film magnetic head for perpendicular magnetic recording includes a nonmagnetic conductive elevation layer disposed under a main magnetic pole layer. The nonmagnetic conductive elevation layer and the main magnetic pole layer forms a trapezoidal shape converging toward an auxiliary magnetic pole layer, viewed from a face opposing a recording...

20060171074 - Shutter lock for use in a flexible data storage card: A flexible data storage card and shutter lock is disclosed. The flexible data storage card includes a housing, a media disc, a shutter, and a shutter lock. The housing includes a card top coupled to a base to define an enclosed region, and an access window defined by the base...

20060171075 - Cable management support bar with strain relief clamps: A clamp that guides and secures cables in a cable management system. The clamp includes a body member and latch members integrally formed with the body member. The body member includes at least one cable guide and the latch members include outwardly extending arms. The latch members pivot from an...

20060171076 - Lead configuration for reduced capacitive interference in a magnetic read/write head: A slider having a lead circuitry configured to minimize capacitive coupling between leads in a slider having a read head, a write head and an extra device such as a heater element. The leads are configures so that wherever a pair of leads cross one another, they do so at...

20060171077 - Apparatus and method for utilizing a small pad to increase a head to a disk interface reliability for a load/unload drive: An apparatus and method for utilizing a small pad to increase a head to a disk interface reliability for a load/unload drive. The method provides a suspension for reaching over a disk. A slider having a read/write head element on a trailing edge (TE) portion is also provided, the slider...

20060171078 - Information storage apparatus: An information storage apparatus comprises: a slider having a head that performs information access to an information recording medium for storing information; an arm that holds the slider so that the head is closed to or in contact to a surface of the information storage medium; a tub fixed on...

20060171079 - Load/unload-type head suspension and method of processing the same: A load/unload-type head suspension is capable of suppressing frictional coefficient variations. The head suspension has a head and a tab that is slid and guided along a ramp block in a read/write apparatus, to move the head away from a hard disk to a retract position. The tab is provided...

20060171080 - Head gimbal assembly, method of manufacturing the same and magnetic disc drive device: A micro-actuator to which no head slider is adhesively bonded is mounted on a suspension. The head slider is adhesively bonded to the micro-actuator mounted on the suspension. Before the head slider adheres to the micro-actuator, an electrical connecting work of the slider is completed, and a characteristic test is...

20060171081 - Magnetic sensor with tilted magnetoresistive structures: A magnetic field sensor device comprising a substrate having at least a first tilted planar section having a surface normal at a first angle with respect to a surface normal of the substrate, and at least a first magnetoresistive layered structure positioned at the at least first tilted section. Methods...

20060171082 - Combination patterning for magnetic head deposited shield and magnetic head made thereby: A method for fabricating a non-electroplated shield using combination patterning and devices formed thereby are disclosed. The method includes depositing a metal layer, such as CZT, removing substantially 75% of the metal layer during a first phase using at least a first removal process and removing a remaining portion of...

20060171084 - Mr sensor and thin film media having alloyed ru antiparallel spacer layer for enhanced antiparallel exchange coupling: A magnetic head having a free layer and an antiparallel (AP) pinned layer structure spaced apart from the free layer. The AP pinned layer structure includes at least two pinned layers having magnetic moments that are self-pinned antiparallel to each other, the pinned layers being separated by an AP coupling...

20060171083 - Enhanced anti-parallel-pinned sensor using thin ruthenium spacer and high magnetic field annealing: An anti-parallel pinned sensor is provided with a spacer that increases the anti-parallel coupling strength of the sensor. The anti-parallel pinned sensor is a GMR or TMR sensor having a pure ruthenium or ruthenium alloy spacer. The thickness of the spacer is less than 0.8 nm, preferably between 0.1 and...