Dynamic magnetic information storage or retrieval inventions 04/06

20060087757 - Biphase magnetic pattern detector using multiple matched filters for hard disk drive: A hard disk drive (HDD) holds data using a biphase scheme. A plurality of matched filters are used to detect binary data represented by the biphase pattern without the need for synchronous sampling or equalization....

20060087758 - Structure, optical device, magnetic device, magnetic recording medium and manufacturing method thereof: A nano structure having pore array structures in which a plurality of periodic arrays are formed adjacent to one another and a method of manufacturing the nano structure are provided. A nano structure having periodic array structures of pores formed in an anodized oxide film with a plurality of types...

20060087759 - Tape drive apparatus: One embodiment of a tape drive apparatus has a non-volatile memory for storing an identifier. Data that is written by the tape drive apparatus to a loaded tape media is tagged using the identifier. This facilitates to identify the tape drive apparatus that has written the data onto the tape...

20060087760 - Simple method of protecting customer data on hard drives returned from the field: A unique identification number is stored in the electronic card that is attached to a disk drive, as well as in a reserved location on the disk itself. This ID number is initialized at head-disk assembly and a match between the two ID numbers is necessary for access to the...

20060087761 - Programmable output impedance for hard drive preamplifier write driver: A write driver output circuit having a programmable output impedance. A plurality of amplifiers are disposed in parallel between an input and an output of an impedance matching section of the write driver circuit and can be selectively enabled to correspondingly set the output impedance of the write driver circuit....

20060087763 - Case: A case (10) for dampening noise generated by a hard disk drive (50), the case (10) comprising: an air-permeable liquid-impervious cover (20) to cover at least an exterior portion (52) of the hard disk drive (50), the exterior portion (52) including a ventilation hole (51) of the hard disk drive...

20060087762 - Disk drive device and installation mechanism for disk drive device: Instead of installation using screws, an installation mechanism is configured by an installation structure formed on a disk drive side and a mating installation structure formed on a system unit side and, using this mechanism, the disk drive is installed and fixed in the system unit. The installation structure on...

20060087764 - Apparatus and method for correcting single plane and coupled plane imbalance with a single mass in a hard disk drive: An apparatus and method for correcting single plane and coupled plane imbalance with a single mass in a hard disk drive. The method provides for measuring a single-plane imbalance of a hard disk assembly and for measuring a coupled-plane imbalance of the hard disk assembly. A greater imbalance from the...

20060087765 - Magnetic head for perpendicular recording: Embodiments of the invention provide a perpendicular recording magnetic head capable of reducing leakage magnetic fields from the soft magnetic films on the air bearing surface side and reducing the protrusion of the soft magnetic films in the direction of the air bearing surface side due to thermal deformation of...

20060087766 - Thin film magnetic head with small track width: In one embodiment, above a read head, a separating layer comprising a nonmagnetic insulating layer is formed. On the separating layer, a lower magnetic yoke is formed. On the lower magnetic yoke, a pedestal magnetic pole is formed at the front end (air bearing surface side). On the pedestal magnetic...

20060087767 - Magnetic tape medium: A magnetic tape medium having superior dimensional stability in the width direction and off-track resistance is provided although having a very high track width in the width direction. As a non-magnetic substrate of a magnetic tape medium in which the track density in the width direction is 50 tracks/mm or...

20060087770 - Magnetic recording head for perpendicular recording, fabrication process, and magnetic disk storage apparatus mounting the magnetic recording head: Embodiments of the invention provide a head which can prevent an external magnetic field form erasing a signal on the medium and whose main magnetic pole piece does not corrode during processing of the air bearing surface. In one embodiment, an anti-corrosion electrode is formed to apply a voltage to...

20060087768 - Method and apparatus for electrically coupling a slider to a wireless suspension substrate: A method and apparatus for electrically coupling a slider to a wireless suspension is disclosed. The wireless suspension includes a substrate material and at least one standoff coupled to the substrate material. The at least one standoff is configured to be coupled to a slider and is further configured to...

20060087769 - Suspension board with circuit: An area 5 for mounting a magnetic head is formed on a metal board 1, a conductive layer 4 is formed as a circuit pattern via an insulation layer 2 interposed outside this area and up to a metal board 1. A pattern end 4 to be a connection terminal...

20060087771 - Current perpendicular to plane (cpp) gmr structure having vanadium doped, ap coupled, multi-layered pinned structure: A current perpendicular to plane (CPP) giant magnetoresistive (GMR) sensor having an antiparallel coupled (AP coupled) pinned layer structure wherein the pinning layer have a greatly reduced negative contribution to dR. The pinned layer structure includes a first a first set of magnetic layers such as CoFe and a second...

20060087772 - Magnetoresistive sensor having a high coercivity hard bias structure: A magnetoresistive sensor having a hard bias structure having increased coercivity and squareness. The structure also allows the use of a thinner seed layer, which results in improved biasing by decreasing the spacing between the hard magnetic bias layer and the free layer of the sensor. The hard bias structure...

20060082912 - Cleaning read/write heads of a magnetic tape recording system: A method is provided of cleaning one or more read/write heads of a magnetic tape recording system using a magnetically recordable cleaning tape in the system. The system performs a cleaning operation including pulling a portion of the cleaning tape through the system so as to clean the or each...

20060082913 - Patterned master carrier for magnetic transfer, magnetic recording medium, and magnetic recording/reproducing apparatus: Magnetic field absorbing regions, composed of protrusions or magnetic layers, are provided in an amplitude servo transfer pattern of a patterned master carrier for magnetic transfer. The magnetic field absorbing regions are provided in intermediate tracks between burst bit elements that constitute burst bit strings, which are provided adjacent to...

20060082914 - Apparatus and method for recording and playing-back information in recording medium: In a medium recording playback apparatus, a write linking position judging unit judges whether a servo frame for reading/writing data is in a servo write linking position. If the servo frame is not in the servo write linking position, a data reading/writing unit reads/writes data using a medium synchronous write...

20060082915 - Apparatus, system, and method for mitigating signal asymmetry: An apparatus, system, and method are disclosed for mitigating signal asymmetry. An analog to digital converter samples an analog signal from a read head and converts the sample to a digital input signal. The digital input signal addresses a look-up module, and the look-up module outputs a modified digital signal....

20060082916 - Tape drive apparatus: A tape drive apparatus has a data transfer apparatus for transferring data between a loaded tape medium and the tape drive apparatus. A data processing apparatus is coupled to the data transfer apparatus for formatting the loaded tape medium. The formatting of the tape medium is performed using an identifier...

20060082917 - Head gimbal assembly with flying height controller, disk drive unit using the same, and flying height adjusting method and system thereof: A HGA comprises a slider, a suspension to load the slider, a flying height controller for controlling flying height of the slider; and a flexible cable to be electrically connected with the slider and the flying height controller. In the present invention, the flying height controller comprises at least one...

20060082918 - Information storage apparatus, and control method and program for the same: An information storage apparatus that records servo information and user data on a recording face of a recording medium wherein a track density measuring unit measures the optimal track density for a recording face corresponding to each head targeting a storage medium on which the servo information has not yet...

20060082921 - Method and apparatus for writing servo data with perpendicular magnetic recording in a disk drive: There is disclosed a servo writing method in which servo data is recorded by a perpendicular magnetic recording system. In the servo writing method, at the time of perpendicular magnetic recording of the servo data on a disk, a servo writing operation is executed including an offset process set based...

20060082920 - Recording/reproducing apparatus including disk recording medium and method of protecting disk recording medium: A recording/reproducing apparatus includes a disk recording medium, a head for accessing the disk recording medium, an escape zone to which the head escapes, a controller operable to control the head, a sensor for detecting vibration or drop of the disk recording medium, and an actuator for moving the head...

20060082919 - Storage device and its control method and manufacturing method: A storage device, which comprises a storage media, a spindle motor which spins the storage media, a head unit which records and reads the data to the storage media, an actuator which carries out the positioning operation to the head unit on the storage media, a loading and unloading system...

20060082922 - Trajectories-based seek: A hard disk drive moves a transducer across a disk surface so that the transducer has an acceleration trajectory, which is symmetric about the midpoint of the curve. A digital signal processor known as a controller is used to control the movement of a transducer. The function of a controller...

20060082923 - Spindle motor and recording disk driving apparatus having the same: A spindle motor and a compact, thin recording disk driving apparatus consuming less power and capable of stable rotation are disclosed. A magnetic head, when accessing a recording disk, is pressed against the recording disk and generates a moment to tilt the rotational axis in a specified direction. A mechanism...

20060082924 - Magnetic recording head for perpendicular recording with wrap around shield, the fabrication process and magnetic disk storage apparatus mounting the magnetic head: Embodiments of the invention are directed to narrowing a read/write gap of a perpendicular magnetic head by applying a wrap around shield, data erasing from return pole edges by returning recording field, and reducing TPR of a magnetic material. In one embodiment, the wrap around shields are formed by partitioning...

20060082925 - Head shock resistance and head load/unload protection for reducing disk errors and defects, and enhancing data integrity of disk drives: A slider in a disk drive is shock-protected with an overcoat layer of either metal or polymer directly on the areas of the slider that are prone to contact the disk when the slider is loaded off the platform, or when the slider is shocked while in operation over the...

20060082926 - Head shock resistance and head load/unload protection for reducing disk errors and defects, and enhancing data integrity of disk drives: A slider in a disk drive is shock-protected with an overcoat layer of either metal or polymer directly on the areas of the slider that are prone to contact the disk when the slider is loaded off the platform, or when the slider is shocked while in operation over the...

20060082928 - Disk device: A slider of a head has a negative-pressure cavity formed in a facing surface, a leading step portion and a leading pad which protrude from the facing surface and are situated on the upstream side of the negative-pressure cavity with respect to an airflow, and a trailing step portion and...

20060082927 - Head, head suspension assembly, and disk device provided with the same: A slider of a head has a negative-pressure cavity formed in a facing surface, a leading step portion which protrudes from the facing surface and is situated on the upstream side of the negative-pressure cavity with respect to an air current, and a trailing portion which protrudes from the facing...

20060082930 - Magnetic head to prevent undesired data erasure and magnetic disk storage having the same: Embodiments of the invention provide a magnetic head (magnetic disk storage) which does not erase data on a recording medium even when a stray field is applied. In one embodiment, the head has a structure that d1<t1 and d2<t2 are satisfied where d1 denotes the positional difference between edges of...

20060082931 - Magnetic head with recessed portion, and magnetic recording and reproduction apparatus comprising the same: Embodiments of the invention provide a magnetic head which prevents data on a recording medium from being erased even when a stray field is applied. In one embodiment, a magnetic head includes a perpendicular write head having a main pole and an auxiliary pole; and a read head having a...

20060082929 - Thin-film magnetic head, head gimbal assembly and hard disk system: A parasitic capacity C4 generated between a slider substrate and the first shield layer with the first insulating layer as a capacity layer is made substantially equal to a parasitic capacity C2 occurring between a lower magnetic layer and the second shield layer with the third insulating layer as a...

20060082932 - Magnetic read head with dual layer lead: A read head has a bottom lead made of material that is relatively polish resistant and a top lead layer that polishes down more easily than the bottom layer. With this structure, when the layers are deposited and then polished down, the top layer recesses away from the sensor (and...

20060082933 - Magnetoresistive element: A magnetoresistive element according to an example of the present invention has a stacked structure comprised first and second ferromagnetic layers and a nonmagnetic layer disposed between these ferromagnetic layers, and a planar shape of at least one of the first and second ferromagnetic layers has a shape formed by...

20060077582 - Magnetic-transfer method, magnetic recording medium, and magnetic recording device: A magnetic-transfer method comprising the steps of: initially DC-magnetizing a transfer-recipient disc in a circumferential direction, by applying a magnetic field to the transfer-recipient disc in the circumferential direction thereof; bringing initially DC-magnetized transfer-recipient disc and a master disc into close contact with each other, on the top side of...

20060077583 - Storage device: The present invention has been made to realize a storage device capable of normally reading out data from the erase processing applied area. In a semiconductor storage device 1, when data read processing is performed for the erase-processing applied area in a memory section 2 to read out erase-state actual...

20060077584 - Low power low noise amplifier for a magnetoresistive sensor: An amplifier for amplifying a differential input signal. The amplifier comprises a parallel configuration of a first and a second transistor differential amplifier, each responsive to a different DC bias current, wherein a gain of the amplifier is based on a sum of the transconductance of each of the first...

20060077585 - Data storage cartridge and system with tamper and damage record sensors: A data storage cartridge is described. The data storage cartridge includes a housing, a data storage medium, a memory module, and at least one sensor. The housing defines first and second housing sections that are reciprocally mated to form an enclosed region. The data storage medium and the memory module...

20060077586 - Spindle motor driving method and apparatus: A spindle motor driving method and apparatus are provided. The method includes detecting the rotation speed of a spindle motor and heating a hard disc drive until the spindle motor reaches normal rotation speed. Accordingly, it is possible to enable the spindle motor to quickly reach the normal rotation speed...

20060077587 - Shock resistant, high reliability rotating magnetic storage device and method: An information recording method in a rotating storage apparatus comprising a rotating recording medium for recording information, a head for performing at least a write operation onto the rotating recording medium, and an acceleration sensor for detecting a shock. The method comprises outputting a shock out signal if an output...

20060077588 - Generalized sinusoidal trajectory for seek servomechanism of hard drives: A hard disk drive moves a transducer across a disk surface so that the transducer has an essentially generalized sinusoidal acceleration trajectory. A digital signal processor known as a controller is used to control the movement of a transducer. The function of a controller is to move the transducer from...

20060077589 - Magnetic head for perpendicular magnetic recording and method of manufacturing same: A pole layer is disposed in a groove of a pole-layer-encasing layer made of a nonmagnetic material with a nonmagnetic film disposed between the encasing layer and the pole layer. A polishing stopper layer made of a nonmagnetic conductive material is disposed on the top surface of the encasing layer....

20060077590 - Magnetic head for perpendicular magnetic recording and method of manufacturing same: A pole-layer-encasing layer made of a nonmagnetic material is disposed on an underlying layer made of a nonmagnetic conductive material. The encasing layer has a groove that penetrates. A pole layer is disposed in the groove. The pole layer is formed by plating through feeding a current to the underlying...

20060077591 - Thin-film magnetic head with heater for adjusting magnetic spacing: A thin-film magnetic head with a higher protrusion efficiency is provided, which comprises: a substrate with an air bearing surface (ABS); a read head element including a lower and upper shield layers, and a write head element including a magnetic pole layer; a heating element provided in a position opposite...

20060077592 - Silicon-made magnetic head slider: In a magnetic disk device, cost reduction is designed by improving productivity, and increase in recording density and increase in capacity of the device or size reduction are designed with reliability being ensured. In one embodiment, a magnetic disk device has a magnetic disk arranged rotatably, a magnetic head slider...

20060077593 - Slider, manufacturing method thereof, and head suspension assembly with the same: A slider of the invention includes a substrate, a head element formed on the substrate and a protecting film formed on at least one portion of one surface of the substrate facing a magnetic recording medium. The protecting film comprises a base film, first DLC (diamond like carbon) film adjacent...

20060077594 - Co-located microacturator lever assembly: A suspension comprises a load beam having a leading portion and a trailing portion, a gimbal sheet mounted to the leading portion and forming a first pad, a second pad, and a displacement lever assembly including at least a first lever arm having a first end adjacent and connected to...

20060077597 - Magnetic detector including antiferromagnetic layer, amorphous barrier layer, base layer, and hard layer arranged in that order and method for manufacturing magnetic detector: A multilayer film is placed on a substrate. The multilayer film includes an antiferromagnetic layer, a pinned magnetic layer, a non-magnetic material layer, and a free magnetic layer. The multilayer film has recessed sections arranged in both side regions thereof, the recessed sections being formed by partly removing the multilayer...

20060077595 - Magnetoresistive effect element, and magnetic head and magnetic reproducing apparatus including the same: A spin-valve magnetoresistive effect film includes a magnetization fixed layer, a magnetization free layer, and an intermediate layer interposed therebetween. The intermediate layer has a conduction part disposed in an insulation layer and made of a magnetic metal material. The ferromagnetic film stacked on an upper side of the intermediate...

20060077596 - Magnetoresistive effect element, and magnetic head and magnetic reproducing apparatus including the same: A spin-valve magnetoresistive effect film includes a magnetization fixed layer, a magnetization free layer, and a nonmagnetic intermediate layer interposed therebetween. The nonmagnetic intermediate layer has a conduction part disposed in an insulation layer and made of a nonmagnetic metal material. The ferromagnetic film stacked on an upper side of...

20060077598 - Resistor having a predetermined temperature coefficient: A material stack has an electrical resistance generally the same in the presence of a magnetic field and in the presence of no magnetic field. The electrical resistance of the material stack has a temperature coefficient generally the same as a magnetoresistance element....

20060072227 - Method and apparatus for magnetic transfer: A magnetic transfer method for performing magnetic transfer is provided wherein magnetic transfer is performed by conjoining and holding in surface-to-surface contact by a holder a transfer master medium, on which transfer data is borne, and a slave medium, to which the transfer data is transferred, and by applying a...

20060072229 - Disk drive, medium and method of compensating for a write parameter: A disk drive, medium, and method controlling a write parameter of a disk drive are provided. The method of compensating for a write parameter, in order to control a write operation of a disk drive, can includes measuring a bit error rate in an optimum write condition and a bit...

20060072228 - Method and circuit for operating a storage device: Memory systems like disk drives are usually sensitive to vibrations. In a consumer electronics environment, with reproduction of audio, this is a problem because audio reproduction means generating vibrations. To prevent performance degradation of the memory system, action is taken to reduce the influence of vibrations on the memory system....

20060072230 - Apparatus and method for testing magnetic disk drive components using drive-based parts: An apparatus and method for testing a component of a magnetic disk drive in which one or more drive-based components is used in the testing process. Each of the drive-based components is based on a corresponding one of the components of the magnetic disk drive. During testing, the component to...

20060072232 - Composite output stage for hard disk drive preamplifier: An apparatus for supplying a load current. The apparatus comprises a first differential amplifier producing a differential output signal and an output buffer comprising a first and a second parallel emitter follower transistors each producing a current responsive to the differential output signal. A second differential amplifier responsive to the...

20060072231 - Current mirrors having fast turn-on time: A current mirror circuit providing a fast turn on time. A node within the circuit is held at a first voltage when the current mirror is off to permit the node voltage to quickly reach a necessary value when the current mirror circuit is turned on....

20060072233 - Information storage system: A host device 1 includes an NG table 10 for storing addresses specifying areas of a bulk memory 3 into which data cannot be written, a performance-guaranteed environment determination means 11 for determining whether or not the current environment of the bulk memory 3 is outside a performance-guaranteed environment where...

20060072234 - System and method for cleaning a tape drive: A system, a method, and article of manufacture are employed to clean the input/output transducers on tape drives, verified by the tape drives reading alphanumeric information from data tracks and servo tracks of a cleaner tape. An aggressive cleaning frontcoat section of the cleaner tape can be used to provide...

20060072235 - Recording/ reproducing method and recording/reproducing apparatus for magnetic tape: A recording/reproducing method and a recording/reproducing apparatus for magnetic tapes are provided as a recording/reproducing technique suitable for recording density enhancement of magnetic tapes. The method and apparatus are capable of correctly recording and reproducing data without causing errors even with occurrence of size changes in the widthwise direction of...

20060072236 - Falling sensor and the information processing device making use of it: r

20060072237 - Magnetic disk storage system: The present invention provides a magnetic disk storage system including a spindle motor that rotates a magnetic disk, a spindle motor drive circuit that rotatably drives the spindle motor, a magnetic head that performs reading of information on the magnetic disk, a voice coil motor that moves the magnetic head,...

20060072238 - Methods and systems for moving a read/write head to a velocity and position where it is useful to switch from a deceleration phase to a settling phase of a seek operation: Improved deceleration control for a disk drive is provided. A deceleration profile is selected based on a present velocity (vi), a present position (xi) and a BEMF constant associated with a voice coil motor (VCM), wherein the deceleration profile is useful for moving the read/write head to a point in...

20060072239 - Portable memory system and device: A solid state memory disk drive device and system are provided. A first preferred embodiment of the present invention comprises (1) at least one digital memory disk located within an enclosure, (2) a motor for rotating the disk(s) about an axis of motion substantially normal to the disk(s), (3) one...

20060072240 - Sheilding function for magnetic head in magnetic disk device: Embodiments of the invention provide a magnetic disk device capable of improving the shielding function for the magnetic head yet maintaining a form factor. In one embodiment, a magnetic disk device comprises a magnetic disk; a magnetic head for recording/reproducing information; a magnetic disk drive mechanism for moving magnetic head...

20060072241 - System, method, and apparatus for a wireless hard disk drive: A sealed Hard Disk Drive filled with an inert gas mixture of air, helium, and/or nitrogen provides a wireless data encrypted interface to facilitate data and control transfer with a host system. The wireless interface additionally allows power transfer through Radio Frequency (RF) propagation or electromagnetic induction. Extended measures for...

20060072242 - Fluid dynamic pressure bearing, spindle motor, and recording disk drive: In a fluid dynamic pressure bearing, upper herringbone grooves and lower herringbone grooves continuous with the upper herringbone grooves are formed on the inner peripheral surface of a sleeve by plastic deformation. In addition, an annular groove recessed radially inward is formed on the outer peripheral surface of the shaft...

20060072243 - Hydrodynamic bearing device, and spindle motor and information device using the same: The present invention has the objective of providing a hydrodynamic bearing device that has high reliability and that is suitable for miniaturization through superior heat resistance and by utilizing a dynamic pressure-generating liquid with little loss due to evaporation. A hydrodynamic bearing device comprises at least one of a shaft...

20060072244 - Methods for modifying or building a disk drive such that a substance is introduced into a disk drive enclosure with the intent to protect, to damage, or to destroy the disk drive and disk drive's data: Data security has two facets, protecting/saving a person's/business's data or destroying data so that it cannot fall into the wrong hands. This invention relates to mechanisms & methodologies for injecting a gas, liquid, solid, chemical, biological agent, nano-technology, or other substance into an existing disk drive for the purpose of...

20060072245 - Supporting member and testing method for magnetic element using the same: A holding portion, on which a slider having a magnetic element for recording and/or replaying is held is provided on a second supporting portion of a supporting member, in which conductive patterns are formed. A plurality of fixing portions are formed in the holding portion and when the slider is...

20060072246 - Magnetic head with air bearing surface protection film and manufacturing method thereof: To promote reduction in thickness of an air bearing surface protective film of a magnetic head, a magnetic head having an air bearing surface protective film consisting only of a thin carbon film while excluding formation of a dead layer by ion incidence as less as possible to the read/write...

20060072247 - Micro-actuator, head gimbal assembly and disk drive unit with the same: A HGA includes a slider, a micro-actuator horizontally rotating the slider with a central portion of the slider as a rotation center, and a suspension to load the slider and the micro-actuator; wherein the micro-actuator comprises a support frame having a base, a moving plate, and a leading beam to...

20060072248 - Electro-dynamic exciter: An electro-dynamic exciter includes a magnetic circuit assembly composed of an outer yoke having a cylindrical peripheral wall, and a bottom wall connected to one end of the peripheral wall, a flat magnet located within the outer yoke and placed on the bottom wall of the outer yoke, and a...

20060072249 - Magnetic sensor using giant magnetoresistive elements and method for manufacturing the same: A magnetic sensor includes a single substrate, a conventional GMR element formed of a spin-valve film including a single-layer-pinned fixed magnetization layer, and a SAF element formed of a synthetic spin-valve film including a plural-layer-pinned fixed magnetization layer. When the spin-valve film intended to act as the conventional GMR element...

20060072250 - Magnetic disk apparatus and method for manufacturing same: A magnetic disk apparatus having a highly sensitive reproducing head and a method for manufacturing the magnetic disk apparatus are disclosed. A spin-valve-type multilayer film composed of an antiferromagnetic layer, a ferromagnetic layer, a nonmagnetic layer and a free magnetic layer is used as a magnetoresistive-effect device for the reproducing...