Dynamic magnetic information storage or retrieval inventions 07/06

20060164743 - Method for copying source data from a source hard disk to multiple target hard disks: A method for one-to-multiple copying of data storage medium is provided, applicable to a hard disk copying system to copy the source data in a source hard disk to a plurality of target hard disks. The method includes steps of preparing a source hard disk and a plurality of target...

20060164744 - Method, system, and program for storing data in a storage medium: Provided are a method, system, and program for writing data in a tape medium having wraps. A layout of the tape is provided including at least one segment within a full available length of a first set of wraps for writing user data and at least one segment within a...

20060164745 - Reel driving apparatus and magnetic recording and reproducing device having the same: A reel driving apparatus and a magnetic recording and reproducing device including the reel driving apparatus, where the reel driving apparatus includes: a driver including at least a portion protruding under a deck chassis; a power transmitting unit transmitting a power to the driver; a power changing unit gearing with...

20060164746 - Method and apparatus for improving performance of hard disk drive at low temperature: A method and an apparatus for improving performance of a hard disk drive at low temperature are provided. The method includes: measuring an internal temperature of the hard disk drive; checking whether a measured internal temperature is not more than a predetermined critical temperature; if the measured internal temperature is...

20060164747 - Method of determining format parameters of hdd: Provided is a format parameter determination method that enables the determination of optimal format parameters according to the characteristics of individual hard disc drives (HDDs) and the characteristics of heads. The method of determining format parameters of an HDD includes: measuring the characteristics of the HDD and heads; and determining...

20060164748 - Tape drive apparatus: A tape drive apparatus has at least one rotary head for reading/writing a track. The track has a number of fragments and each fragment has an identifier. The tape drive apparatus has a position indicator apparatus for providing a signal that indicates a rotational position of the head. The combination...

20060164749 - Method for retracting head upon interruption of power, and disk drive employing the method: A charge and discharge controller causes an capacitor to be charged by a power supply to a disk drive, and causes the capacitor to discharge when a power supply monitor detects the interruption of power to the disk drive. Upon detection of the interruption of power, an SPM controller supplies...

20060164750 - Magnetic recording and reproducing apparatus: In a magnetic recording and reproducing apparatus according to the related art, since positions of central points of radiuses of curvature of opposing arc portions of a guide groove are coincident with each other in the direction in which a movable chassis is moved, it is difficult to make the...

20060164751 - Disk drive with vibration suppression: Embodiments of the invention provide a disk drive suppressing a surface deformation of a top cover. In one embodiment, the disk drive includes a base and a top cover. The base accommodates a head assembly, a circuit unit, and a recording medium. The top cover is supported by the base...

20060164752 - Servo track write at low pressure using pressure insensitive air bearing surface: Embodiments of the invention provide a manufacturing method for a disk drive which allows highly accurate recording of servo data without substituting the internal gas of the disk drive, and such a magnetic disk drive and servo track writer. In one embodiment, a disk, a magnetic head slider with a...

20060164753 - External computer hard drive and heat-dissipating base thereof: An external computer hard drive and heat-dissipating base thereof is provided. The heat-dissipating base corresponds to the external hard drive. The external hard drive provides an easy structure for installing and replacing the external hard drive, and emits light from a housing on standby. The heat-dissipating base is a circular...

20060164754 - Magnetic disc unit: A magnetic disc unit includes a rotating disc type magnetic disc having an outer periphery, and a carriage arm linked to a head support mechanism for a recording/reproducing head. A base has an outer periphery and mounts the rotating disc type magnetic disc and the carriage arm, and has a...

20060164755 - Magnetic head and magnetic recording/reproducing device: In a magnetic head, a multilayer film is disposed, the multilayer film including metal magnetic films and non-magnetic films that are alternately laminated, and a boundary between the multilayer film and a magnetic oxide substrate or a non-magnetic substrate on which the multilayer film is to be formed is parallel...

20060164756 - Perpendicular magnetic recording head: An auxiliary magnetic section has a multilayer structure consisting of auxiliary magnetic layers and a non-magnetic layer and a first auxiliary magnetic layer is bonded to a main magnetic pole layer. This allows the auxiliary magnetic layers to have large induced magnetic anisotropy due to antiferromagnetic coupling in a track...

20060164757 - Magnetic field sensing device and a fabricating method of the same: A magnetic field sensing device and a fabrication method of the same featuring an easy planarization profess for a substrate and a simplified procedure by the benefit of a slim planarizing substance. The magnetic field sensing device includes a substrate with a well of a predetermined depth and a plurality...

20060164759 - Magnetic head: The disclosed invention provides a magnetic head of high stability in which “erase after write” is prevented. Here is provided a magnetic head comprising a thin-film magnetic head for perpendicular magnetic recording, the thin-film magnetic head including a main pole with its tip facing a magnetic recording medium and coils...

20060164758 - Thin-film magnetic head and magnetic storage apparatus using the same: A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer...

20060164760 - Recording heads having electrical pads on multiple surfaces: A recording head is disclosed that includes electrical pads on multiple surfaces. The recording head includes a substrate portion abutting a deposited portion. The deposited portion includes an air bearing surface (ABS) (or bottom surface), an end surface, and at least one other surface. The end surface is the surface...

20060164761 - Wiring component and magnetic recording drive for high data-rate recording: Embodiments of the invention enable high-speed data recording on a magnetic recording medium. In one embodiment, a first section is provided at the recording and reproducing circuit IC side of the inter-connect substrate while a second section is provided at the head side and a third section is provided between...

20060164762 - Hard disk drive connecting a flexible printed circuit and actuator arm and method thereof: A hard disk drive (HDD) with an efficient connection between a flexible printed circuit and an actuator arm. The structure includes a flexible printed circuit having the flexible printed circuit and a stiffener for supporting the flexible printed circuit, and an actuator arm to which the flexible printed circuit is...

20060164763 - Micro-actuator unit, head gimbal assembly, and disk drive unit with vibration canceller: A HGA of the invention includes a slider, a micro-actuator for adjusting the position of the slider; a suspension to load the slider and the micro-actuator; and a vibration canceller interposed between the micro-actuator and the suspension. The micro-actuator includes a first base-part plate, a pair of actuator side arms...

20060164764 - Magnetoresistance effect element, magnetic head and magnetic recording and/or reproducing system: There is provided a practical magnetoresistance effect element which has an appropriate value of resistance, which can be sensitized and which has a small number of magnetic layers to be controlled, and a magnetic head and magnetic recording and/or reproducing system using the same. In a magnetoresistance effect element wherein...

20060164766 - Exchange bias structure for abutted junction gmr sensor: Although it is known that exchange bias can be utilized in abutted junctions for longitudinal stabilization, a relatively large moment is needed to pin down the sensor edges effectively. Due to the inverse dependence of the exchange bias on the magnetic layer thickness, a large exchange bias has been difficult...

20060164765 - Ta based bilayer seed for irmn cpp spin valve: The effectiveness of an IrMn pinning layer in a CPP GMR device at high switching fields has been improved by replacing the conventional single layer seed by a layer of tantalum and either ruthenium or copper. The tantalum serves to cancel out the crystallographic influence of underlying layers while the...

20060158762 - Information recording device having dubbing function: An information recording device according to the present invention includes an HDD 5, a DVD 6 and a VCR 7. During transferring and recording information from DVD 6 onto VCR 7, a transfer control circuit 20 short-circuits between an input node and an output node. Accordingly, an image signal line...

20060158761 - Method and apparatus for copying data from one disc drive to another disc drive: A method and an apparatus for copying data of a disc drive are provided. The method includes: determining whether the first disc drive has a predetermined jumper pin connection by identifying which of a plurality of jumper pins in a jumper block of the first disc drive are connected, the...

20060158763 - Master disk for magnetic transfer, magnetic recording medium and magnetic recording apparatus: The present invention provides a master disk for magnetic transfer which has a disk-like outer shape and in the surface of which a large number of fine magnetic layer patterns are formed, wherein the relationship between the outside diameter size d (mm) of the extreme outer circumference of the magnetic...

20060158764 - Degauss waveform generator for perpendicular recording write head: Embodiments of the invention provide a hard disk drive that is capable of performing degaussing promptly and properly and a recording method for use with such a hard disk drive. A hard disk drive according to one embodiment of the present invention comprises a current source for supplying a first...

20060158766 - Information reproducing apparatus and information recording/reproducing apparatus: An information reproduction system that provides an apparatus for reproducing audio/video information from an information recording medium having a tape form for example and circumventing problems associated with illegal copies of information recording media. If a match is found between the contents of identification data information read from a memory...

20060158765 - Power management in operating recording media: A method of managing power used by a recording medium is disclosed. The recording medium receives a maximum current value and limits its operation to consume up to the maximum current value during a given storage operation. The recording medium may comprise a storage module coupled to a controller. The...

20060158767 - Disc recording device: There is provided a disk recording apparatus capable of minimizing a servo error and recording in the last zone at the maximum one of the recording speeds specified in the apparatus or disk recording medium even if the disk recording medium is in poor condition. At any position during disk...

20060158768 - Method of setting the amount of power application to heater incorporated in magnetoresistive head and magnetic disk drive: An integrated circuit in a hard disk drive contains a resistance measurement circuit for a magnetoresistive head. The relationship between the amount of a resistance change in the magnetoresistive head and the amount of a temperature rise, the relationship between the amount of a temperature rise and the average amount...

20060158769 - On the fly write head flyheight detector: Embodiments of the invention measure a flying height of a recording head. According to one embodiment, in a magnetic circuit comprising a recording head and a magnetic disk, a magnetic resistance changes when a flying height of a recording head fluctuates. A change in an impedance of a recording circuit...

20060158770 - Hdd data read control apparatus, medium, and method: A hard disc drive (HDD) data read control apparatus, medium, and method reading data from a disc having non-uniform track-to-track spacing. The data read control method of the HDD, in which data is read from a disc including non-uniform track-to-track spacing, includes seeking a target track by adopting an off...

20060158771 - Magnetic tape and manufacturing method thereof, and servo writer: A magnetic tape is characterized in that a servo signal for performing tracking control of a magnetic head is written on a data band, data is recorded on the data band, and the servo signal is magnetized and written on the servo band magnetized in any one of direction of...

20060158772 - Torque constant correction method in multiple sinusoidal seek servo and disk drive using the same: A disk drive control method and apparatus. In particular, a torque constant correction method and apparatus in a disk drive using a multiple sinusoidal seek servo scheme. The torque constant correction method includes: performing a test seek routine for torque constant correction by using a multiple sinusoidal seek scheme; storing...

20060158773 - Head seek control method suppressing vibrations and rotatary recorder/reproducer: In seek control for a head of a rotary recorder/reproducer, the seek time is reduced with noise reduced while utilizing a driving force of an actuator effectively. In one embodiment, when a microprocessor generates a control signal for a drive current given to an actuator for head seek, a signal...

20060158774 - Cassette library device: A cassette library apparatus includes a swing arm (16a) provided at a swing frame (34) provided at a picker (15) to be swingable up and down, and swingable integrally with the swing frame (34), an engaging part (18) provided at a tip end of the swing arm (16a) and linked...

20060158776 - Hard disk drive device and method of assembling the hard disk drive device: A hard disk drive device and method for assembling such a device are provided. The hard disk drive device includes storage medium components comprising a drive motor and disk for digital data storage, which are attached to a section of a casing that encloses the drive's mechanical components. Opposite the...

20060158775 - Magnetic disk drive with elastic support member: The positioning accuracy of a magnetic head decreases due to vibrations in the in-plane rotation mode of an HDD, which are caused by couple or disturbance occurring in seek operation, due to vibrations in the thrust mode, and the conical mode, of the spindle, which are caused by disturbance, and...

20060158777 - Hard disk drive with disk spacer and spindle motor assembly: A hard disk drive (HDD) having a spindle motor, at least one data storage disk, a disk clamp fastened to the spindle motor and fixing the disk to the spindle motor, and at least one disk spacer mounted on the spindle motor to support the disk. The disk spacer includes...

20060158778 - Spindle motor having a fluid dynamic bearing system: The invention relates to a spindle motor having a fluid dynamic bearing system and comprises a rotor having a cylindrical shaft, a first bearing disk disposed at one end of the shaft and a second bearing disk that is disposed on the shaft at a spacing to the first bearing...

20060158779 - Magnetic head for perpendicular magnetic recording, head gimbal assembly, head arm assembly and magnetic disk drive: A magnetic head for perpendicular magnetic recording comprises: a pole layer, a write shield layer, and a gap layer provided between the pole layer and the write shield layer. The pole layer incorporates a track width defining portion and a wide portion. The track width defining portion has an end...

20060158780 - Magnetic recording head and method of manufacturing the same: A magnetic recording head and a method of manufacturing the same. The magnetic recording head includes a stack containing a main pole and a return pole. The stack includes a first magnetic layer having a groove formed therein; an insulating layer covering a surface of the groove; and a second...

20060158781 - Thin film magnetic head and manufacturing method thereof: The invention is directed to improvement of a write element of a thin film magnetic head. In said write element, a first coil and a second coil are provided on a first insulating film formed on one surface of a first magnetic film and surround in a spiral form a...

20060158782 - Magnetic head support, magnetic head assembly including the magnetic head support, and magnetic disk drive including the magnetic head assembly: Embodiments of the invention provide a magnetic head support capable of achieving reduction in weight, while maintaining good stiffness and vibration characteristics, a magnetic head assembly including the magnetic head support, and a magnetic disk drive including the magnetic head assembly. In one embodiment, the magnetic head support includes (a)...

20060158783 - Apparatus and method for reducing heat absorption around solder pads on an electrical lead suspension (els): An apparatus and method for reducing heat absorption around solder pads on an electrical lead suspension (ELS). The method provides a base-metal layer having at least one opening. A dielectric layer is also provided above the base-metal layer, the dielectric layer covering a portion of the base-metal layer and at...

20060158784 - Method and apparatus for extending a cover layer formation with respect to a solder pad portion on an electrical lead suspension: An apparatus and method for extending a cover layer formation with respect to a solder pad portion on an electrical lead suspension (ELS). The method provides a base-metal layer for the ELS. A dielectric layer is also provided above the base-metal layer, the dielectric layer covering a portion of the...

20060158785 - Electrical lead suspension having partitioned air slots: An electrical lead suspension (ELS) having partitioned air slots. The ELS includes a laminate. A first plurality of signal traces and a second plurality of traces are in a first formed layer of the laminate. The second plurality of traces may be signal traces or power traces. The laminate has...

20060158786 - Carriage arm assembly for locating magnetic head, and magnetic disk apparatus using the same: A carriage for a magnetic disk apparatus includes a slider on which a magnetic head for reading/writing information from/to a disk is mounted, a suspension for carrying the slider and for applying a predetermined load to the slider, and a carriage arm to which the suspension is attached. The carriage...

20060158787 - Magnetic head supporting mechanism, magnetic head apparatus, head actuator using the magnetic head apparatus and magnetic recording apparatus: An object of the present invention is to provide a hard disk drive or related apparatus in which a possibility of head crash can be reduced to minimum even if the apparatus receives an external impact during the operating state. To achieve the object, according to the present invention, in...

20060158788 - Actuator of hard disk drive and method of fabricating the actuator: An actuator with fewer components and a method of easily fabricating the actuator. The actuator includes first and second arm members stacked over each other, head gimbal assemblies respectively fixed to front ends of the pair of arm members, and a fastening mechanism fastening the pair of arm members. Each...

20060158789 - Magnetic head and method of manufacturing the same: Even if the track and gap widths are made narrow in a read head, a narrow track head has so far been unable to afford satisfactory off-track characteristics because of a wide shield spacing over electrodes. The invention provides a magnetic head wherein, in the height direction of a magnetoresistive...

20060158790 - Magnetoresistive sensor having a novel junction structure for improved track width definition and pinned layer stability: A magnetoresistive sensor having improved pinned layer stability at small track widths. The sensor has substantially vertical side walls that define the track width of the sensor. The free layer terminates at the substantially vertical side walls, but the pinned layer structure or a portion thereof extends beyond the track...

20060158791 - Gmr sensor having layers treated with nitrogen for increased magnetoresistance: A magnetoresistive sensor having a substrate that has been treated with nitrogen (nitrogenated) and having a Ta cap layer with nitrogen added in situ during deposition. The nitrogenated substrate includes an alumina base layer and a thin top layer of crystalline alumina that has had a very small amount of...

20060158792 - In-stack biasing of the free layer of a magnetoresistive read element: A magnetoresistive read element with improved biasing of the free layer is disclosed. The read element includes a free layer, a spacer layer, a first pinned bias layer, an APC layer, and a second pinned bias layer antiparallel exchange coupled with the first pinned bias layer. The second pinned bias...

20060158793 - Magnetoresistive head, manufacturing method thereof, and read write separation type head: Making thinner the magnetic domain control layer deteriorates the magnetic properties. Also, disturbances tend to increase the magnetization dispersion of the magnetic domain control layer, thereby lowering the magnetic domain control bias magnetic field. In one embodiment of the invention, a first magnetic domain control layer is provided in the...

20060152835 - Method of forming a servo pattern on a rigid magnetic recording disk: A contact magnetic transfer (CMT) method for forming a magnetic pattern, such as the servo pattern on a magnetic recording disk, uses a master template with antiferromagnetically-coupled (AF-coupled) magnetic islands. The template is a rigid or flexible substrate with each magnetic island being two ferromagnetic films antiferromagnetically-coupled by an antiferromagnetically-coupling...

20060152836 - Method and apparatus for encoding and decoding a runout correction bit pattern of servo field: One or more bits are added to the embedded repeatable runout correction (ERRC) bit pattern of a servo field so that errors in ERRC bit patterns can be detected and in certain cases corrected. If four bits are added, a single bit error in an ERRC bit pattern can be...

20060152837 - Method of forming servo data of hdd and self servo write method using the same: A method of forming servo data, and a self-servo write method using the same, the method including partial response maximum likelihood (PRML)-coding servo data into m bits in n-bit units; multiplying each bit of the PRML-coded result by an o multiple; and converting a bitsream obtained in the multiplying to...

20060152838 - Magneto-resistive head resistance sensor: A recording system employing a magneto-resistive (MR) element senses a resistance value of the MR element and generates one or more MR resistance (MRR) signal values based on the sensed MR element resistance value. The MRR signal values might be, for example, current or voltage values proportional or inversely proportional...

20060152839 - Storage medium with overcoat layer for enhanced heating: A data storage system includes a magnetic storage medium and a write head configured to be positioned adjacent the storage medium and. The write head includes a magnetic field source configured to apply a magnetic field to the storage medium and an optical near field coupling structure configured to locally...

20060152840 - Cassette library device and method of controlling the attitude thereof: A cassette library apparatus and a posture control method thereof are provided. A swing arm (16a) is capable of chucking or releasing a cassette (1) by getting into a recessed part (10a) of the cassette (1) and getting out of the recessed part (10a) when a swing frame (34) swings...

20060152841 - Data storage medium library, data storage medium magazine, host device, data storage medium library system, method of operating a data storage medium library, method of operating a host device, method of operating a data storage medium library system, sig: A data storage medium library includes a plurality of magazines. The magazines include a plurality of cells. An addressor addresses a logical cell address of the cell that stores a data storage medium. The logical cell address indicates what number the cell is as counted in ascending order in the...

20060152842 - Free-fall detection device and free-fall protection system for a portable electronic apparatus: In an integrated free-fall detection device for a portable apparatus an acceleration sensor generates acceleration signals correlated to the components of the acceleration of the portable apparatus along three detection axes. A dedicated purely hardware circuit connected to the acceleration sensor generates a free-fall detection signal in a continuous way...

20060152844 - Load/unload system and method for maximizing disk writeable area: A system and method for loading a head onto a specified load zone of a disk includes reading positional index information for determining a position of a pre-specified load zone of a disk. When to load a head is determined based on the positional index information so that the head...

20060152843 - Servo information recording method, magnetic recording media, and magnetic disk apparatus: Embodiments of the invention provide optimum servo patterns for perpendicular magnetic recording method. In one embodiment, a burst field of servo patterns is composed of burst-signal parts in each of which a constant frequency occurs successively and zero-signal parts each of which has been demagnetized to a state of zero-magnetization,...

20060152845 - Magnetic recording medium and magnetic recording/reproducing apparatus: A magnetic recording medium includes a servo area where servo data used for detecting a position of a magnetic head on a magnetic recording medium is recorded; and a writable data area, arranged side by side with-the servo area in a track direction, on which user data is written by...

20060152846 - Servo writer and tape drive system: A head unit includes a head, and a head guide assembly disposed adjacent to the head to restrict a displacement of a tape (tape-like storage medium) in a tape width direction with respect to the head. A tape drive system includes a tape guide arrangement disposed to guide the tape...

20060152847 - Optical disc drive with integral hard disk cache drive: An optical disc drive including, in a separate sealed chamber, a magnetic disk drive which serves as a cache for the optical disc drive. The optical disc and the magnetic disk are carried on separate spindles which are non-coaxial. Optionally, the optical disc and the magnetic disk overlap....

20060152848 - Recording disk driving motor and recording disk driving apparatus having the same: A recording disk driving motor and a recording disk driving apparatus having the motor are disclosed. The recording disk driving motor comprises a position restricting portion between a fastening member and the upper part of the motor to restrict the amount by which the fastening member is fastened axially downward....

20060152849 - Magnetic head having a write coil structure with a reduced electrical resistance for reducing thermal protrusion: Magnetic heads having write coil structures with reduced electrical resistances for reducing thermal protrusion are disclosed. In one illustrative example, a magnetic head includes a magnetic yoke; a write gap layer formed between upper and lower poles of the magnetic yoke; and a write coil having a plurality of coil...

20060152850 - Method for independent trackwidth and wall angle control and hexagonal write head: A method is disclosed for independently controlling track width and bevel angle of a write pole tip having a P3 pole tip for perpendicular recording. The method includes establishing the track width in a portion of the P3 layer material. A portion of this portion having the established track width...

20060152851 - Planar servo format verifier head: A planar servo verifier head is provided comprising a plurality of magnetic head elements optimized for the readback process. The plurality of magnetic head elements are fabricated in a planar two-dimensional array in which individual elements can be used to read servo format tracks spaced across the width of a...

20060152852 - Thin film magnetic head having solenoidal coil and method of manufacturing the same: A magnetic head includes first and second magnetic layers and first and second coil pieces in a space between and outside the first and second magnetic layers, respectively. A film thickness of second coil layers (second coil pieces) disposed below a main magnetic pole layer (first magnetic layer) is larger...

20060152853 - Magnetic media having a servo track written with a patterned magnetic recording head: A thin film magnetic recording head utilizing a timing based servo pattern is fabricated using a focused ion beam (FIB). The recording head is fabricated by sputtering a magnetically permeable thin film onto a substrate. A gap pattern, preferably a timing based pattern, is defined on the thin film and...

20060152854 - Method and apparatus for reducing crosstalk and signal loss in flexing interconnects of an electrical lead suspension: A method and apparatus for reducing crosstalk and signal loss in an electrical interconnect is disclosed. The electrical interconnect includes a laminate. A plurality of signal traces and a subsequent plurality of traces are in a first formed layer of the laminate. The subsequent plurality of traces may be signal...

20060152855 - Apparatus and method for reducing solder pad size in an electrical lead suspension (els) to decrease signal path capacitive discontinuities: An apparatus and method for reducing solder pad size in an electrical lead suspension (ELS) to decrease signal path capacitive discontinuities. The method provides a base-metal layer for the ELS. A dielectric layer above the base-metal layer is also provided. A signal conductive layer is provided above dielectric layer. The...

20060152856 - Short-tail head gimbal assembly testing fixture: A method and system for testing the read/write head's dynamic electrical performance on an HGA level is disclosed. A head gimbal assembly (HGA) testing system has a spin stand holding a hard disk and a tester to send test signals through an HGA. The tester sends its signals through a...

20060152864 - Magnetic resistive head and magnetic recording apparatus: A magnetoresistive head comprises a free magnetic layer that has first and second free magnetic films sandwiching a non-magnetic intermediate film therebetween, the respective magnetizing directions of the first and the second free magnetic films are antiparallel. The length of the free magnetic layer in the direction of the track...

20060152863 - Magnetic sensor having a ru/si based seedlayer providing improved free layer biasing: A magnetoresistive sensor having a novel seed layer that allows a bias layer formed there over to have exceptional hard magnetic properties when deposited over a crystalline structure such as an AFM layer in a partial mill sensor design. The seed layer structure includes alternating layers of Ru and Si...

20060152862 - Magnetoresistance effect elements, magnetic heads and magnetic storage apparatus: The magnetoresistance effect element is of a multilayered structure having at least magnetic layers and an intermediate layer of an insulating material, a semiconductor or an antiferromagnetic material against the magnetic layers, and the magnetoresistance effect element has terminals formed at least on the opposite magnetic layers, respectively, so that...

20060152859 - Three terminal magnetic sensor having an in-stack longitudinal biasing layer structure: A three terminal magnetic sensor (TTM) suitable for use in a magnetic head has a base region, a collector region, and an emitter region. A first barrier layer is located between the emitter region and the base region, and a second barrier layer is located between the collector region and...

20060152858 - Three terminal magnetic sensor having an in-stack longitudinal biasing layer structure and a self-pinned layer structure: In one illustrative example, a three terminal magnetic sensor (TTM) has a base region, a collector region, and an emitter region. A sensing plane is defined along sides of the base region, the collector region, and the emitter region. A first barrier layer is located between the emitter region and...

20060152860 - Three terminal magnetic sensor having an in-stack longitudinal biasing layer structure in the collector or emitter region: In one illustrative example, a three terminal magnetic sensor (TTM) suitable for use in a magnetic head has a base region, a collector region, and an emitter region. A first barrier layer is located between the emitter region and the base region, and a second barrier layer is located between...

20060152857 - Three terminal magnetic sensor having an in-stack longitudinal biasing layer structure in the collector region and a pinned layer structure in the emitter region: In one illustrative example, a three terminal magnetic sensor (TTM) suitable for use in a magnetic head has a base region, a collector region, and an emitter region. A first barrier layer separates the emitter region from the base region, and a second barrier layer separates the collector region from...

20060152861 - Tunneling magneto-resistive spin valve sensor with novel composite free layer: The conventional free layer in a TMR read head has been replaced by a composite of two or more magnetic layers, one of which is iron rich The result is an improved device that has a higher MR ratio than prior art devices, while still maintaining free layer softness and...

20060146430 - Master carrier for magnetic transfer, inspecting method thereof, and magnetic recording medium producing method: In a master carrier for magnetic transfer which comprises a support that has a transfer-recording pattern arrayed in the track direction thereof in accordance with the information to be transferred to a magnetic recording medium, and a magnetic layer formed on the transfer-recording pattern of the support, the in-plane distance...

20060146431 - Information recording device, information recording method, and recording medium region management method: An information recording apparatus of the present invention writes input data on a recording medium by the predetermined data amount, and each time the writing of data of the predetermined data amount is completed, reads the data from the area on the recording medium on which the data is written...

20060146433 - Method for determining unique write inhibit thresholds for individual heads for maximizing file servo performance: A method for determining a write inhibit threshold value for at least one head of a file during the file manufacturing process is disclosed. The method includes qualifying a test track for use in the determining of the write inhibit threshold value. The method further includes performing a write inhibit...

20060146432 - Methods for detecting contact between a read-write head and the accessed disk surface in a hard disk drive: Determining a contact condition between read-write head and accessed disk surface inside hard disk drive, where micro-actuator assembly mechanically couples to slider and electrically interacts through signal path. Signal path sensed, creating sensed feedback signal, used to determine contact condition, which indicates when read-write head is, or is not, in...

20060146434 - Verification system for magnetically-written data: A method of verifying the accuracy or authenticity of alphanumeric magnetic data on a document, wherein the configuration of a pictorial or graphic magnetic reference image in the document is made visible by bringing movable particulate magnetic material into proximity therewith such that the particulate magnetic material takes up a...

20060146435 - Data erasing device using permanent magnet: A data erasing device erasing data from a magnetic disk using horizontal-direction and vertical-direction magnetic fields of magnets consists of a main body case having a path connected to an opening formed on one side surface, a first magnetic field generating source having three permanent magnets adjacently disposed on one...

20060146436 - Method and system for displaying a series of recordable events: A method and system for displaying identifiers for one or more series of recordable events is described. A system, such as the system of a digital video recorder, may receive a set of recordable events data, such as a listing of all television shows to be broadcast over a two-week...

20060146437 - Apparatus for detecting contact between a read-write head and the accessed disk surface in a hard disk drive: Determining a contact condition between read-write head and accessed disk surface inside hard disk drive, where micro-actuator assembly mechanically couples to slider and electrically interacts through signal path. Signal path sensed, creating sensed feedback signal, used to determine contact condition, which indicates when read-write head is, or is not, in...

20060146438 - Video cassette recorder: A video cassette recorder has a recorder body with an outer case, a bottom plate, and operating parts mounted in the recorder body. The recorder includes a depression partially formed on the bottom plate which corresponds to the operating parts to lower the positions of the operating parts for minimizing...

20060146439 - Media cartridge storage device for an autoloading data storage and retrieval system: A cartridge storage device includes a housing having a front and a back. A plurality of cells are mounted in the housing, each cell adapted for receiving a media cartridge. A drive mechanism drives the cells towards a front opening in the front of the housing for allowing insertion and...

20060146441 - External/removable hard disk drive tray: An external/removable hard disk drive tray includes a main housing, and a first and a second end cap inserted into two opposite open ends of the main housing. The main housing defines an internal space, in which a carrier is disposed. The carrier has two opposite ends projected from the...

20060146440 - Magnetic disk device: A magnetic disk device having a cover of a simple structure having high rigidity and not easily deformable by pressure from the outside. An envelop surface configuration (46) of at least a portion of a cover (40) positioned opposite a magnetic disk (2, 43) is made generally conical, such that...

20060146442 - Method of fabricating a workpiece from a sheet of material: A method of fabricating a workpiece from a sheet of material to form an exterior right angle edge on the work piece. A sheet of material having a top surface and a bottom surface is provided. The top surface of the sheet of material is pressed with a die in...

20060146444 - Hard disc drive cover-integrated gasket: A hard disc drive cover-integrated gasket, which comprises a metallic cover and a packing material integrated with the metallic cover, the packing material being a molding material from a mixture comprising 100 parts by weight of EPDM or a blend of EPDM and polystyrene type thermoplastic elastomer, 10-100 parts by...

20060146443 - Method and apparatus for airflow transition edges on noise dampers in a hard disk drive: The present invention includes apparatus and methods for disk dampers with an inlet edge and/or an outlet edge, oriented and shaped to control airflow within the hard disk drive. The inlet edge and the outlet edge reduce the airflow turbulence at the actuator assembly. This improves the Position Error Signal...

20060146445 - Erasure-resistant perpendicular magnetic recording media, systems & method of manufacturing same: e

20060146446 - Method and apparatus for flexible printed circuit bracket including crash stop and/or air block in a hard disk drive: The present invention includes a flexible printed circuit bracket including a crash stop rubber and/or an air block. The air block directs the air flow from the rotating disk surface(s) away from the head gimbal assemblies to minimize positional variance of the read-write heads. The crash stop rubber contacts the...

20060146447 - Head stack assembly, hard disk drive, and manufacturing method thereof: A disk drive unit of the invention comprises a motor base; a disk stack comprising at least one disks; a spindle motor being attached to the motor base for rotating the disk stack; and a HSA comprising at least one HGA, which having first terminal pads; and a controlling circuit...

20060146448 - Method and apparatus for an actuator arm block including a crash stop stub in a hard disk drive: The invention includes an actuator arm block for use in an actuator assembly within a hard disk drive, which includes a crash stop stub on a middle actuator arm to contact a crash stop rubber in the hard disk drive. The crash stop stub is preferably aligned with a crash...

20060146449 - Micro-actuator, vibration canceller, 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 is provided with a vibration canceller that counteracts forces generated by activation of the micro-actuator when making fine head position adjustments. The...

20060146450 - System, method, and apparatus for providing a temporary, deep shunt on wafer structures for electrostatic discharge protection during processing: A wafer-level shunt is incorporated into a sensor design. The sensor is formed with two shields. When the ABS is etched into the slider, this region of the ABS is recessed to form a deep etch region. A top of the shunt is centered in this region and a bottom...

20060146452 - Cip gmr enhanced by using inverse gmr material in ap2: Improved performance of CIP GMR devices has been achieved by modifying the composition of AP2. Said modification comprises the addition of chromium or vanadium to AP2, while still retaining its ferromagnetic properties. Examples of alloys suitable for use in AP2 include FeCr, NiFeCr, NiCr, CoCr, CoFeCr, and CoFeV. The ruthenium...

20060146453 - Electrical leads having ordered-phase crystalline structures for magnetoresistive sensors used in magnetic heads and fabrication method therefor: A magnetic head including an electrical lead layer that is comprised of a material having an ordered-phase crystalline structure. In a preferred embodiment, the ordered-phase crystalline structure of the electrical lead is epitaxially matched to the crystalline structure of the hard bias layer upon which it is formed, and there...

20060146451 - Magnetoresistive element and magnetic memory device: A magnetoresistive element has a ferromagnetic double tunnel junction having a stacked structure of a first antiferromagnetic layer/a first ferromagnetic layer/a first dielectric layer/a second ferromagnetic layer/a second dielectric layer/a third ferromagnetic layer/a second antiferromagnetic layer. The second ferromagnetic layer that is a free layer consists of a Co-based alloy...