Dynamic magnetic information storage or retrieval inventions 05/06

20060109578 - Systems and methods for using microjog calibration to detect damaged heads: A microjog test in a storage device measures a read/write offset indicating a deviation between a positioning of a read/write head during a write operation to a location and a positioning of the read/write head when a peak signal amplitude is measured for data read from the location. By monitoring...

20060109579 - Magnetic recording medium, magnetic record reproducing apparatus, and method of reproducing data: A magnetic recording medium includes a data area in which data can be written and a servo area in which information is recorded for positioning a magnetic head to a target position. The servo area has a preamble area for clock synchronization and an address area where address information of...

20060109580 - Magnetic disk medium, magnetic disk drive, and method for detecting rotational position of magnetic disk medium: Embodiments of the invention reduce the information (storage) overhead for determining the rotational position of a magnetic disk medium, as well as reducing the rotational position detection time. In one embodiment, a sector servo magnetic disk medium is configured such that: each track is divided into blocks each including a...

20060109581 - Device for operating a hard disk drive of a mobile communication terminal during impact and a method thereof: A device and method are provided for preventing the damage of a disk by stopping the operation of a hard disk drive (HDD) if vibration is exerted on a hard-disk mobile communication terminal or free falling thereof occurs. The hard-disk mobile communication terminal stops the operation of a HDD by...

20060109582 - Mobile communication terminal and method of reducing power consumption of a hard disk drive of a mobile communication terminal: A mobile communication terminal and a method for reducing power consumption for driving a hard disk drive (HDD) of a mobile communication terminal are provided when controlling an interface between a transition integrated circuit (TIC) that takes charge of the interface with the HDD built in the mobile communication terminal...

20060109583 - Method and apparatus for servo writing with servo pattern examination in a disk drive: There is disclosed a servo information writing apparatus comprising a disk drive and an examination unit. The examination unit executes examination to select an adequate servo pattern as servo information from a plurality of types of servo patterns recorded beforehand in a disk medium incorporated in the disk drive. The...

20060109584 - Self servo writing method, hard disk drive using the same, and recording medium storing the method: Provided is a self servo writing method of writing a final servo signal based on a reference servo signal in a hard disk drive, and more particularly, a method of writing a uniform final self servo signal by compensating for a non-uniform width of tracks where a reference servo signal...

20060109585 - Method and apparatus using micro-actuator stroke sensitivity estimates in a hard disk drive: Operating micro-actuator using stroke sensitivity estimate including controlling micro-actuator directing read-write head toward track using stroke sensitivity to create micro-actuator stimulus signal. Servo controller may support operating micro-actuator. Method of estimating may be used to create stroke sensitivity during at least initialization/calibration of manufacturing hard disk drive. Embedded circuit may...

20060109586 - Disk drive with a dual-stage actuator and failure detection and recovery system for the secondary actuator: A dual-stage actuator disk drive has calibration tracks located in a nondata band, and uses a secondary-actuator failure detection and calibration test run by the servo control processor. The calibration tracks contain a pattern of pre-written magnetized test blocks. The test is run with the primary actuator biased against a...

20060109587 - Automatic balancing device, rotational driving device and disk drive: Disclosed herein is an automatic balancing device including a balancer made of a magnetic fluid, a rotatable enclosure having an outer circumferential wall and accommodating the balancer, a magnet provided near at least the center of rotation of the enclosure so as to be rotatable integrally with the enclosure, and...

20060109588 - Method of making a perpendicular recording magnetic head pole tip with an etchable adhesion cmp stop layer: The method of making a magnetic head assembly includes forming a second pole piece layer that is recessed from a head surface, forming a reactive ion etchable (RIEable) pole tip forming layer on the second pole piece layer, forming an adhesion/stop layer of tantalum (Ta) on the pole tip forming...

20060109589 - Recording and/or reproducing device having a positioning arrangement for positioning a cleaning brush: A brush driving mechanism, which drives a cleaning brush from a retracted position to an operation position opposed to a magnetic head, has a main arm having a tip coupled to the cleaning brush through a shaft. A chassis has a chassis slit, in which the shaft is inserted, for...

20060109590 - Media cartridge: A media cartridge includes a housing, a tape, and at least two tape position sensor openings in the housing adjacent the information storage tape. The tape position sensor openings are separated by a distance that is less than the height of the tape....

20060109591 - Method of making substrates for media used in hard drives: A method for making substrates is disclosed. The method comprises providing a rod, which is made out of a substrate material and has an outside diameter substantially the same size as the outside diameter of a finished substrate and an inside diameter substantially the same size as the inside diameter...

20060109592 - Magnetic head and magnetic recording/reproducing system: A high output, magnetoresistive head with a CPP structure is disclosed which reduces or prevents deformation near the air bearing surface of the read element portion layer at the time of air bearing surface processing. In the CPP structure magnetoresistive head, the deformation near the air bearing surface as a...

20060103958 - System and method for determining intergranular exchange in perpendicular recording media: A method for estimating the average intergranular exchange field using measurements of major and minor hysteresis loops. The method also facilitates deshearing hysteresis loops for analysis purposes in perpendicular media. This estimation technique is especially important for modern perpendicular media because exchange plays a critical role and process control can...

20060103961 - Digital recording and reproducing apparatus, recording medium used therefor, and error factor estimating method and error factor estimating system thereof: An error factor estimating method estimates a factor of an error occurring when information recorded on a digital recording medium is reproduced by a digital recording and reproducing apparatus. The error factor estimating method includes the steps of: recording error factor estimation data on a digital recording medium; reproducing the...

20060103959 - Magnetic spacing measurement: One embodiment in accordance with the invention includes a method. The method can include utilizing a harmonic test on a magnetic disk of a hard disk drive that produces a first result and a second result. A magnetic spacing distance between a transducer head of the hard disk drive and...

20060103960 - Method of estimating life of head, method of inspecting recording medium, method of evaluating head, and information recording/reproducing apparatus: A method of estimating life of a head that reads information recorded in a recording medium includes detecting magnitude of an impact due to a contact between the head and the recording medium; and estimating the life of the head based on the magnitude of the impact detected....

20060103962 - Method and apparatus for testing a servo circuit of a read/write head system: A test pattern generator for generating test patterns for testing a servo circuit of a read/write head system. The pattern generator uses a relatively simple encoding technique to produce test patterns that have peaks with phase characteristics similar or identical to the phase characteristics of peaks of real data patterns,...

20060103963 - Hard drive protection override: A method and system for overriding a hard drive Active Protection System (APS). APS automatically parks a read/write head and locks the platters in a Hard Disk Drive (HDD) in a notebook computer in response to a physical shock, such as when the computer is dropped from the user's lap...

20060103964 - Variable control of write parameters for hard disk drive: A hard disk drive that changes a variable write parameter of a head during a write operation. The controller can change the variable write parameter to compensate for a transient temperature profile of the head during the initial stage of a write operation. By way of example, the controller can...

20060103966 - Extendable virtual autoloader systems and methods: A virtual cartridge autoloader system is provided. A first autoloader device has multiple cartridge holders. Each cartridge holder is configured for electrical communication with removable data cartridges having electronic interfaces. The first autoloader device performs virtual loading functions on the removable data cartridges using an electronic switch. A second autoloader...

20060103965 - Systems and methods for reducing power dissipation in a disk drive including an adjustable output voltage regulator: A disk drive system includes an adjustable output (linear or switching) voltage regulator including an output terminal that provides an output voltage. A plurality of loads each include a voltage supply terminal that receives the output voltage. A controller dynamically adjusts the output voltage based, e.g., based on which of...

20060103967 - Method for writing spiral reference servo signal in hard disk drive and method for compensating for temperature: A method for writing a spiral reference servo signal suitable for a self-servo writing method in a hard disk drive includes writing a first reference pattern in an end direction of a spiral reference servo signal writing concentrically on the disk; writing a spiral reference servo signal on a current...

20060103968 - Dynamic skew compensation systems and associated methods: In one example, a system for positioning a transducer head to a storage medium is provided. The system includes a transducer head assembly including read/write elements, at least one actuator for adjusting the azimuth position of the transducer head, first and second position sensors, and a controller. The first and...

20060103969 - System and apparatus for position error signal linearization: A hard disk drive that utilizes a plurality of integrated gain compensation values to correct a non-linear position error signal (PES) function of the drive. The gain compensation values are generated, integrated and stored during an initial burn-in process of the drive. The PES is used in a servo loop...

20060103970 - Servo control for magnetic disk drive: Embodiments of the invention provide a magnetic disk drive that exhibits excellent overall stability of a feedback control system even when the preset frequency for a peak filter significantly changes. In one embodiment, the symbol P denotes a VCM model, which outputs a head current position signal. The symbol C...

20060103971 - Mono pole piece for a two stage tape drive actuator: An actuator device includes a pole piece and at least one magnet for generating a magnetic field. A coarse positioner having a coil surrounding the pole piece provides coarse actuation in a direction parallel to an axis of the pole piece. A fine positioner having a coil surrounding the pole...

20060103972 - Flexible data tpi in hard disk drives: A hard disk drive with a disk that has a plurality of servo sections and a plurality of data sections. At least some of the data sections have a track density different than the track density of the servo sections. The disk drive has a controller that may convert a...

20060103973 - Cartridge loading devices: A cartridge loading device for magnetic tape cartridges comprises a first member 12, a second member 14, a guide arrangement 30, 32, 36, 38 for guiding movement of the second member relative to the first member from a first position to a second position and a locking system 80, 82,...

20060103974 - Base plate and cover plate for hard disk drive: A base plate and a cover plate for a hard disk drive. At least one of the base plate and the cover plate is formed with a push pin hole extended in a slot shape in a predetermined length through which a push pin passes to implement a servo track...

20060103975 - Disk driving apparatus and magnetic disk apparatus having the same: A disk driving apparatus includes a bearing sleeve having a cylindrical shape, a shaft rotatably supported in the bearing sleeve, a hub coupled to the shaft and having a support portion which supports a disk medium outside of the bearing sleeve, the hub further having a male screw portion formed...

20060103976 - Magnetic winding and method of making same: The present invention provides an improved magnetic winding and method of calculating desired winding parameters (winding layer thickness, number of winding layers and number of turns per winding layer) for a winding in a magnetic component. The invention may be applied to general boundary conditions in a magnetic winding or...

20060103977 - Magnetic recording head: A magnetic recording head includes a return pole, a writing pole spaced a predetermined distance from the return pole, an induction writing coil forming a magnetic field on the writing pole, and a writing pole shield formed on the same plane as the writing pole....

20060103978 - Single pole type recording head with tapered edges: A magnetic head for perpendicular recording without writing from the lateral sides of a main pole and without erasing data on adjacent tracks. A magnetic disk storage apparatus using the magnetic head. The lateral side of the main pole of a magnetic head for perpendicular recording may have an inverted...

20060103982 - Perpendicular recording head with reduced thermal protrusion: Embodiments of the invention secure a sufficiently large magnetic field, and deter a protrusion phenomenon of a perpendicular magnetic recording head, causing a problem in implementing a low flying height, while solving problems such as erasure of information in peripheral tracks. In one embodiment, a main pole or a stacked...

20060103979 - Thin film magnetic head structure, method of making the same and thin film magnetic head: A thin-film magnetic head structure has a configuration adapted to manufacture a thin-film magnetic head configured such that a main magnetic pole layer including a magnetic pole end part on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the magnetic pole end part...

20060103980 - Thin-film magnetic head structure, method of manufacturing the same, and thin-film magnetic head: A thin-film magnetic head structure has a configuration adapted to manufacture a thin-film magnetic head configured such that a main magnetic pole layer including a magnetic pole tip on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the magnetic pole tip so as...

20060103981 - Thin-film magnetic head with heating element for adjusting magnetic spacing and control method of magnetic spacing: A thin-film magnetic head that the protrusion response of the write head element due to the heat generated from the heating element can be set to the same level as that due to the heat generated from the write coil layer in order to adequately resolve the deficiency in the...

20060103983 - Distributed shunt structure for lapping of current perpendicular plane (cpp) heads: An apparatus and method for lapping and fabricating a read/write head is described. The lapping method includes performing a first lapping process on a structure having the read/write head fabricated therein. The first lapping process is for reducing a first resistive region. The first resistive region is located proximal to...

20060103984 - Flexible printed circuit and hard disk drive with the same: Provided is a flexible printed circuit including a circuit layer with a desired circuit formed thereon, a base layer supporting the circuit layer, a conductive metal layer positioned on at least one side of the base layer, and an insulation film interposed between the base layer and the conductive metal...

20060103985 - Head drum assembly and magnetic recording/reproducing apparatus having the same: A head drum assembly is disclosed which can prevent a magnetic tape from departing from a tape traveling system. The head drum assembly comprises a head drum which records information to a magnetic tape traveling along a defined track or reproduces information recorded on the magnetic tape. A departure preventing...

20060103986 - Head drum assembly of magnetic recording and reproducing apparatus: A head drum assembly for a magnetic recording and reproducing apparatus that records information onto a recording medium or reproduces the recorded information from the recording medium includes a stationary drum mounted to a deck chassis, a shaft fixed to a center portion of the stationary drum, a rotary drum...

20060103987 - Narrow track read sensor: A narrow track width read sensor having a high magnetoresistive sensitivity is made using a self-aligned process which requires the use of only a single resist mask. A plurality of sensor layers which includes a top layer of noble metal is deposited over a substrate. Optionally, a central protective barrier...

20060103988 - Cpp with elongated pinned layer: CPP magnetic read head designs have been improved by increasing the length of the AFM layer relative to that of both the free and spacer layers. The length of the pinned layer is also increased, but by a lesser amount, an abutting conductive layer being inserted to fill the remaining...

20060103989 - Magnetic head, magnetic head gimbal assembly, magnetic recording and reproducing apparatus, and magnetic memory: A magnetic head is provided with a giant magnetoresistive element, barrier layer, and highly polarized spin injection layer. The barrier layer is inserted between the giant magnetoresistive element and the injection layer. By applying a sensing current to both the magnetoresistive element and the injection layer, an output of the...

20060103991 - Magnetoresistive head using longitudinal biasing method with 90-degree magnetic interlayer coupling and manufacturing method thereof: A magnetoresistive head and a fabricating method thereof accomplishing high read sensitivity and excellent linear response with low noise even if track width narrowing makes progress are provided. In one embodiment, using a magnetoresistive film having a laminated body of a pinned layer/an intermediate layer/a free layer/a separate layer/a first...

20060103990 - Magnetic head manufacturing method, magnetic head, angle setting device and lapping device: In a magnetic head manufacturing method, a floated surface of each block having plural magnetic head elements formed and arranged on a substrate is ground and lapped in a grinding/lapping step. The grinding/lapping step contains an anglea djusting step for adjusting the angle of the floated surface of the block...

20060098317 - Method of disk delivery of magnetic transfer apparatus, disk holding apparatus and magnetic transfer method and apparatus using same: The present invention provides a magnetic transfer apparatus comprising: a disk holding apparatus including a chuck which has one or more suction openings at its end and absorbs a disk with the suction openings, wherein a channel in communication with the suction openings is provided in the chuck, and a...

20060098318 - System and method for determining long-range erasure of adjacent tracks in hard disk drive: A method for identifying victim tracks distanced from an aggressor track in a hard disk drive that are deleteriously affected by long range fringe effects causing adjacent track interference (ATI) when the aggressor track is written includes writing first and second frequencies to candidate victim tracks, and writing a third...

20060098319 - Disc apparatus and servo pattern write method thereof: Disclosed are a disc apparatus and a servo pattern write method thereof. The disc apparatus includes a disc having: a first servo pattern formed of burst patterns and written to have predetermined repetition patterns in a radial direction; and second servo pattern having a first repetition pattern portion and a...

20060098320 - Storage control device and method for detecting write errors to storage media: There are provided a cache region that stores write data from a host device, storage media, a data storage region for the storage media, and a comparison unit. A first comparison object is generated for N items of write data on the cache region and the N items of write...

20060098321 - Apparatus for writing a magnetic layer: An apparatus for writing a magnetic layer writable with either low or high coercive field strength with a magnetic head (1) with a magnet coil (6) and a voltage source (9) has switches (22, 23) between the voltage source (9) and the magnet coil (6). Two further switches (30, 31)...

20060098322 - Reproducing head and magnetic disk drive: A reproducing head including a read element, first and second electrodes provided at the opposite ends of the read element, a ground electrode provided between the first and second electrodes, a first constant current circuit for passing a first constant current between the first electrode and the ground electrode, and...

20060098323 - System and method for controlling the speed of a tape drive: A control system and method for operating a system comprising a host computer, a buffer, a tape drive and a tape is provided. The method includes writing data to the tape while the tape is traveling at a first speed; stopping the tape; determining an optimum second speed to drive...

20060098324 - System and method for tape drive under run control: A control system and method for operating a system comprising a host computer, a buffer, a tape drive and a tape is provided. The method includes writing data to the tape while the tape is traveling at a first speed; stopping the tape; determining a minimum distance to reposition the...

20060098325 - Method for eliminating the need for a dedicated landing zone at the outer diameter of a storage system's platter: Embodiments of the present invention pertain to a method for loading a slider that eliminates the need for a dedicated landing zone at the outer diameter of a platter. In one embodiment, a slider is lowered from a ramp, which is positioned in close proximity to the outer diameter of...

20060098326 - Methods for increasing the usable position error signal (pes) region: Methods are provided for selecting write elements, that can be used in a media-writer, for writing servo burst patterns that have a desired width. Methods for writing preferred servo patterns are also provided. Methods for controlling a write current to produce servo bursts have a desired width are also provided....

20060098328 - System and method for tape drive control: A system and method for damping the motion of the head of a tape drive is disclosed. The method includes measuring the position of the head over time with a position sensor; damping the motion of the head based on the measured position of the head over time; and tuning...

20060098327 - Systems and rotatable media for increasing the usable position error signal (pes) region: Systems for writing preferred servo patterns, and rotatable storage media including preferred servo patterns, are provided. Systems for controlling write currents to produce servo bursts having a desired width are also provided. In accordance with specific embodiments, the desired burst width is three-fourths of a data track wide. This description...

20060098329 - Method and apparatus positioning a read head to follow a track in a hard disk drive: Read positioning method includes adjusting at least one read head position when accessing read track on at least one rotating disk surface based upon Burst Correction Value of nearest write track, when PES burst patterns of read track and nearest write track match. Apparatus supporting read positioning method may include...

20060098330 - Method of creating correction table for head position control, head position control method, and disk device: A head position control method controls the position of a head by correcting components synchronizing rotation of a disk based on the head control amount. A correction signal for components synchronizing rotation is generated by using a filter function. The filter function that integrates the sine and cosine terms of...

20060098331 - System and method for measuring the position of a tape drive head: A sensor for measuring the position of the head of a tape drive is disclosed. The sensor includes a light emitter movably connected to the head; a light sensor movably connected to the head and rigidly connected to the light emitter and located to receive a beam of light from...

20060098332 - Damper for information storage device: Dampers are interposed between plural surfaces of an information storage device and facing surfaces of an electronic device to reduce shocks and vibrations applied to the information storage device mounted inside the electronic device. Each of the dampers includes portions contacting the electronic device, and portions contacting the information storage...

20060098333 - Magnetic head for rotary head drum: A magnetic head for a rotary head drum is disclosed which can suppress abrasion thereof while a sufficient contact thereof with a magnetic tape is secured. An upper side tape sliding surface and a lower side tape sliding surface are formed on a tape sliding surface at an end of...

20060098334 - Laminated side shield for perpendicular write head for improved performance: A perpendicular write head is disclosed for writing information onto tracks. The write head includes a top pole and a return pole and side shields with laminated layers wherein said laminated layers have magnetization in a direction parallel to an air bearing surface (ABS) and perpendicular to the tracks....

20060098335 - Magnetic head for perpendicular magnetic recording, head gimbal assembly, head arm assembly and magnetic disk drive: A pole layer incorporate a track width defining and a wide portion. A material forming the pole layer is an alloy whose major elements are iron and nickel. In the alloy, where the proportions of iron and nickel with respect to the total of iron and nickel are indicated as...

20060098339 - Method for manufacturing a magnetic head using a multi-stage ion milling: A method for manufacturing a magnetic head for perpendicular magnetic recording is disclosed. The method comprising: a first step of depositing a non-magnetic film over and around the main magnetic pole, and subsequently polishing and planarizing the non-magnetic film, wherein the non-magnetic film is made of a non-magnetic material which...

20060098340 - Perpendicular magnetic recording head where main magnetic pole having inclined surface is formed and method of manufacturing the same: In the perpendicular magnetic recording head according to the invention, the inclined surface, which is inclined toward the trailing side at the tilt angle θ1 with respect to the virtual vertical line extending from the top surface of the recording medium, is formed in the trailing-side cross section of the...

20060098338 - 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...

20060098336 - Perpendicular recording head having controlled permeability and saturation moment: A method and apparatus having magnetic properties. The apparatus includes a main pole and a return pole spaced apart from the main pole. The return includes at least one multilayer block having a plurality of alternating layers of magnetic material and non-magnetic material. The return pole also includes a single...

20060098337 - Tungsten heat sink structures in a thin film magnetic head: A magnetic head having one or more tungsten heat sinks is disposed within the magnetic head to draw heat away from the components of the head to limit unwanted thermal expansion and protrusion of the components of the magnetic head into the air bearing gap. In a first embodiment, a...

20060098341 - Recording medium cartridge having a memory accessible from multiple directions: A recording medium cartridge that is housed in a library, extracted from the library by a gripping mechanism, and loaded into a drive device includes a case, within which is housed a recording medium, and a memory, in which is stored information relating to the recording medium and that is...

20060098342 - Magnetic disk cartridge: A magnetic disk cartridge, which holds therein a magnetic disk with recording density and has a liner composed of polyethylene terephthalate fibers, is provided which achieves a good dust-removal effect by the liner without flawing the magnetic disk and without increasing the rotary torque of the magnetic disk. A magnetic...

20060098343 - Magnetic recording medium and magnetic recording and reproduction apparatus: A magnetic recording medium is provided, which includes a recording layer formed in a concavo-convex pattern to achieve high areal density and can ensure good recording and reproduction characteristics so as to provide high reliability. The magnetic recording medium has a substrate and a recording layer formed in the predetermined...

20060098344 - Method and apparatus providing head suspension sag control reducing off-track motion due to disk flutter in a hard disk drive: The present invention includes the following. Load beams for head suspension assemblies optimally providing head gimbal assemblies with the ability to minimize the effects of disk vibration from rotating disk surfaces during the track following sequences. Operating at least a head gimbal assembly as follows, when the read-write head is...

20060098345 - Head drum assembly and a magnetic recording/reproducing apparatus having the same: A head drum assembly comprises a stationary drum, a rotary drum, and a self-compensating dynamic balancer. The stationary drum is fixed to a shaft, and the rotary drum is rotatably mounted to the shaft so that it faces the stationary drum. The rotary drum supports a magnetic head. The self-compensating...

20060098346 - Method and apparatus for a mems micro-actuator assembly in a hard disk drive: A micro-actuator assembly, which includes a first micro-actuator. The first micro-actuator includes: Two pivot spring pairs coupling to first stator and second stator. Two flexure spring pairs and pitch spring pair coupling to central movable section, which includes signal pair paths coupling to read-write head of a slider. The central...

20060098347 - Micro-actuator, head gimbal assembly and disk drive unit with the same: A HGA includes a slider; a micro-actuator comprising a bottom plate, a moving plate, and two arm plates symmetrically disposed with an axis of the bottom plate as symmetry axis to connect the moving plate and the bottom plate; and at least one piezoelectric pieces to be bonded to the...

20060098348 - Microactuator, head gimbal assembly and magnetic disk drive: A method and system for manufacture of a microactuator comprising a frame further including a base to connect with suspension and two moving arms to be connected parallel to said base, two piezoelectric elements to be respectively connected to said moving arm, and a slider height adjuster connecting with said...

20060098349 - Thin film magnetic head, head gimbal assembly, and hard disk drive: In a thin film magnetic head of the present invention, lead formation patterns of a first lead for connection between a lower shield layer and a first extraction electrode portion and a second lead for connection between an upper shield layer and a second extraction electrode portion are each formed...

20060098351 - Multi-port cable for removable esd/eod protection for electronic devices: A protective device for protecting an electronic device, e.g., MR head, from ESD/EOS damage includes a cable having leads coupled to the electronic device and a first port providing access to the leads. A second port with one-to-one electrical connection to each lead in the cable provides a second electrical...

20060098350 - Reusable esd shorting member and cable: A mechanism for protecting an electronic component from electrostatic discharge (ESD) damage. The system includes a cable adapted for coupling to an electronic device, the cable having multiple traces therein adapted for electrical communication with components of the electronic device. The cable has a window therein positioned between opposite ends...

20060098352 - Dual cpp gmr sensor with in-stack bias structure: A dual current perpendicular to plane (CPP) sensor having an in stack bias structure disposed between first and second free layers. The hard bias structure includes a plurality of magnetic layers antiparallel coupled with one another. At least one of the magnetic layers of the in stack bias structure includes...

20060098353 - Magnetoresistive element, magnetoresistive head, magnetic recording apparatus, and magnetic memory: A magnetoresistive element has a magnetization pinned layer a magnetization direction of which is substantially pinned in one direction, a magnetization free layer a magnetization direction of which varies depending on an external field, and a spacer layer including an insulating layer provided between the magnetization pinned layer and the...

20060098357 - Exchange coupling film and magnetoresistive element using the same: A PtMn alloy film known as an antiferromagnetic material having excellent corrosion resistance is used for an antiferromagnetic layer. However, an exchange coupling magnetic field is decreased depending upon the conditions of crystal grain boundaries. Therefore, in the present invention, the crystal grain boundaries formed in an antiferromagnetic layer (PtMn...

20060098355 - Exchange-coupled film including pinned magnetic layer composed of a plurality of cobalt-iron alloys having different compositions disposed on antiferromagnetic layer, and magnetic sensing element: An exchange-coupled film includes a ferromagnetic layer and an antiferromagnetic layer disposed on each other, the magnetization direction of the ferromagnetic layer being pinned in one direction by an exchange coupling magnetic field generated at the interface between the ferromagnetic layer and the antiferromagnetic layer, wherein the antiferromagnetic layer is...

20060098356 - Magnetic head having layered film with tilted crystalline grain structure: Embodiments of the invention implement a construction capable of reconciling high read output with high stability by improving the structures of magnetic films. In one embodiment, an inclined crystal grain structure is applied to a soft magnetic free layer, ferromagnetic pinned layer and so forth, thereby enhancing electron scatter performance...

20060098354 - Magnetic tunnel junctions using amorphous materials as reference and free layers: Magnetic tunnel junctions are constructed from a MgO or Mg—ZnO tunnel barrier and amorphous magnetic layers in proximity with, and on respective sides of, the tunnel barrier. The amorphous magnetic layer preferably includes Co and at least one additional element selected to make the layer amorphous, such as boron. Magnetic...

20060092537 - Magnetic transfer apparatus, method of operating the same and magnetic recording medium: According to a method and an apparatus of the present invention, it is possible to remove a slave disk remaining within the apparatus to outside the apparatus while efficiently suppressing the pollution of the master disk and a decrease in the working rate during the occurrence of an abnormality in...

20060092536 - Transfer method, apparatus and method of inspecting master disk: The present invention provides a transfer apparatus comprising: a disk holding device which holds a master disk having many protruding patterns formed on the surface thereof by a holder section; a transfer device which transfers a pattern of the master disk to a slave disk; and an inspection device which...

20060092538 - System and method for determining whether defect in perpendicular recording disk drive is from thermal asperity or defect in magnetically soft underlayer: A method for determining whether a spike in a read back signal from a read head positioned over a perpendicular recording disk having a magnetically soft underlayer (SUL) is caused by a defect in the SUL or by a thermal asperity (TA). A first read back signal with the spike...

20060092539 - Determination of magnetic tape write quality employing write equalization transitions: A signal sampler digitally samples magnetic signals detected by read head(s) of a magnetic tape drive, and a signal quality system extracts from the digital samples of a format required signal of the magnetic signals, such as a data set separator pattern, an estimated amplitude of write equalization transitions of...

20060092540 - Magnetic media write signal filter: In one embodiment, a magnetic media write signal filter includes a plurality of resistors connected in series across output signal lines of a write driver and a capacitor connected between a junction of resistors and a ground....

20060092541 - Magnetic recording disk drive with patterned media and circuit for generating timing pulses from the pattern: A magnetic recording disk drive has a patterned magnetic recording disk with data blocks of magnetizable material separated by nonmagnetic regions, a read head for reading the magnetized data blocks and generating a readback signal, and a timing circuitry that generates from the readback signal a series of timing pulses....

20060092542 - Large-capacity magnetic memory using carbon nano-tube: Disclosed is a high-capacity magnetic memory capable of writing and reading a magnetic record in/from a magnetic recording film according to a perpendicular magnetic recording system at a high speed in a purely-electrically random access manner. In the magnetic memory, a writing-magnetic-field generating means 62 and a writing word line...

20060092543 - System, method, and apparatus for in-situ stray magnetic field measurement: A hard disk drive (HDD) detects and measures external stray magnetic fields with existing HDD components. After detecting a strong external magnetic field, read and write operations of the HDD are suspended, and/or other proper corrective actions are taken to minimize loss of data. To measure the stray magnetic field,...

20060092544 - Shock indicator for a data storage tape device: A data storage tape device is provided, including: a housing; a tape medium contained in the housing; and a human-perceivable shock indicator having a default status and a disrupted status, the shock indicator switching from the default status to the disrupted status in response to a shock event such that...

20060092545 - Servo writer: Disclosed is a servo writer in which a servo write head is easy to exchange, and which writes, to magnetic tapes, a servo signal from which a reading signal of the improved SN ratio can be obtained. The servo writer includes a magnetic tape running system, at least one DC...

20060092546 - Apparatus, system, and method for determining contact with a magnetic head in a tape drive: An apparatus, system, and method are disclosed for determining brush contact with a magnetic head. A digitally generated signal is provided in a system and a first gain constant is adjusted without the brush in contact with the magnetic head until the signal achieves unity gain. A second gain constant...

20060092547 - Method and a device for recording and reproducing data onto and from a magnetic tape: A recording/reproducing method and a recording/reproducing device for magnetic tapes are less involved displacements between recording track and reproducing head even upon changes in the widthwise size of the magnetic tape, and capable of recording and reproducing data without causing errors, thus being ready for recording density enhancement of magnetic...

20060092550 - Data reliability improvement at low temperature: Embodiments of the invention perform a stable data write operation at a low operating ambient temperature and promptly perform a write command process within a magnetic recording apparatus that employs a load/unload design. In one embodiment, write heads unloaded on a ramp are completely preheated before magnetic disks reach their...

20060092549 - Magnetic disk drive and method for executing seek operation: Embodiments of the invention reduce the noise occurring when the lubricating layer on the magnetic disk is smoothed. In one embodiment, a magnetic disk drive has a read/write mode parameter table for generating an electric current to be supplied to a voice coil motor when the magnetic head performs data...

20060092548 - Spin stand and head/disk test device: A spin stand which comprises a disk rotator for rotating a magnetic disk and a head mover for supporting the magnetic head in such a way that it can be attached or removed and moving the magnetic head at least in the direction of the track width of the disk,...

20060092551 - Library system, data storage medium transportation mechanism, method of initializing a data storage medium transportation mechanism, method of transporting a data storage medium, signal-bearing medium embodying a program of initializing, and signal-bearin: A library system includes a first library device that includes a first-drive for reading information from or writing information to a data storage medium and a first storage cell for storing the data storage medium, a second library device that includes a second drive for reading information from or writing...

20060092555 - Cartridge loading apparatus: A cartridge loading apparatus 300 comprises a cartridge loading device 10 for magnetic tape cartridges and a mounting 302 for the device. The cartridge loading device comprises a first member 12, a second member 14 and a guide arrangement for guiding movement of the second member relative to the first...

20060092553 - Cartridge loading devices: A cartridge loading device 10 for magnetic tape cartridges comprises a first member 12, a second member 14 and a guide arrangement 30, 32, 36, 38 for guiding movement of said second member relative to said first member from a first position to a second position. The first and second...

20060092554 - Cartridge loading devices: A cartridge loading device 10 for magnetic tape cartridges includes a first member 12, a second member 14 movable relative to the first member from a first position to a second position and a guide arrangement for guiding movement of the second member between its first and second positions. The...

20060092552 - Cassette housing assembly and a magnetic recording and reproducing apparatus having the same: A cassette housing assembly for a magnetic recording and reproducing apparatus includes a cassette housing adapted to receive a cassette tape and having a locking lever. An X-lever supports vertical movement of the cassette housing with respect to a deck chassis. A locking member fixes the locking lever to retain...

20060092556 - Perpendicular hard disk drive resistive against external magnetic field: Embodiments of the invention prevent a decrease in magnetization or demagnetization from occurring to recording magnetization regardless of a direction in which a stray field is applied. In one embodiment, an apparatus for data storage system comprises a head having a magnetic field shield in the vicinity of a main...

20060092557 - Disk device: In a case having an almost sealed structure are provided a disk-shaped recording medium, a drive motor, a head which performs information processing, a head actuator which moves the head with respect to the recording medium, and a breathing filter. The breathing filter includes an envelope which has air permeability...

20060092558 - Hard disk drive, hard disk damper, and method for the same: A hard disk drive, hard (HDD) disk damper, and method for the same. The HDD may include a base member, a spindle motor installed on the base member, a plurality of data storage disks mounted on the spindle motor, an actuator pivotably installed on the base member to move a...

20060092559 - Clamp assembly for a data storage device with a lubricant trap to prevent lubricant migration from mounting screws: An embodiment of the invention clamp assembly for a disk which includes a cavity for trapping the excess lubricant which migrates from the load bearing threads of the screws that hold the assembly in place. In a preferred embodiment a flexible structure, called a screw lubricant trap, is included between...

20060092561 - Disk clamp assembly: An assembly for coupling a disk to a spindle includes a lower layer adapted to engage the disk and an upper layer constructed of a material having a stiffness greater than that of the lower layer. The upper and/or lower layer has protrusions extending therefrom for mating with receiving areas...

20060092560 - Plastic spacer and disk clamp assembly: An assembly for coupling a disk to a spindle includes an annular spacer ring adapted to engage the disk and an annular clamp. The spacer ring is constructed at least in part of a plastic material. The clamp is constructed of a material having a modulus and stiffness greater than...

20060092562 - Winged design for reducing corner stray magnetic fields: Embodiments of the present invention are directed to structures of a recording head having a winged design for reducing corner stray magnetic fields. In one embodiment, the present invention comprises a magnetic recording head comprising a plurality of components. In embodiments of the present invention at least one of the...

20060092566 - Double notched shield and pole structure for stray field reduction in a magnetic head: A double notched magnetic structure for use in a magnetic head for avoiding stray field writing. The structure could be a magnetic shield, magnetic pole of a write head or some other magnetic structure used in a magnetic head of a magnetic recording system, and has notches formed at both...

20060092563 - Magnetic head with common seed layer for coil and pedestal: A method for fabricating a coil and pedestal for a write head using a common seed layer is described. A nonmetallic gap layer is deposited on a planarized pole piece surface. Openings for the pole piece pedestal and the back gap pole piece are etched through the nonmetallic gap layer....

20060092564 - Method for manufacturing a stitched \"floating\" trailing shield for a perpendicular recording head: A bi-layer, floating, trailing shield for use in a perpendicular magnetic recording system and a method for manufacturing such a trailing shield. Manufacturing the trailing shield as a bilayer trailing shield allows certain critical alignments to be maintained during lithography and allows high resolution photolithographic procedures to be used by...

20060092565 - Notched shield and pole structure with slanted wing for perpendicular recording: A magnetic structure for use in a magnetic head for avoiding stray field writing. The magnetic structure can be for example a magnetic shield or could be a magnetic pole of a write head and is particularly advantageous for use in a perpendicular recording system, because such perpendicular recording systems...

20060092567 - Process and structure for a perpendicular writer having an exchange coupling discontinuity: The non-zero remanence state that is associated with a single pole writer often results in self-pole-erasure (SPE). This problem has been overcome by inserting a very thin exchange de-coupling layer into the magnetic circuit of the write pole. This facilitates vortex formation at the pole tip region so the remanent...

20060092568 - Single-pole recording head having trapezoidal main pole and bevel angle promotion layer and methods of fabricating the same: A single-pole perpendicular magnetic recording head contains a bevel angle promotion layer that facilitates the fabrication of the bevel angle in a trapezoidal main pole. The bevel angle promotion layer is made of a non-magnetic material that is softer than the material (e.g., Al2O3) that normally underlies the main pole....

20060092569 - Winged pole and shield structure for reducing stray field in a perpendicular write head: A magnetic structure for use in a magnetic recording head, the structure having improved resistance to stray field writing. The magnetic structure can be for example a magnetic shield or a return pole of a perpendicular write element. The structure includes a main body portion which may have a generally...

20060092570 - Disk drive slider design for thermal fly-height control and burnishing-on-demand: An embodiment of the invention is a slider with a lift pad and a thermal protrusion pad in which the heads are located. The lift pad is located immediately in front of the thermal protrusion pad and is designed to achieve the flying characteristics needed for normal operation of the...

20060092571 - Disk drive suspension assembly and recording and/or reproducing apparatus with suspension assembly: A suspension assembly installed on an end of a swing arm and elastically biasing a slider with a read/write head toward a surface of a disk in a disk drive. The suspension assembly includes a load beam coupled to the one end of the swing arm, a flexure coupled to...

20060092572 - Magnetic head slider supporting apparatus, head gimbal assembly, head arm assembly and magnetic disk drive: A magnetic head slider supporting apparatus comprises: a suspension flexibly supporting a slider; and a flexible wiring board. The suspension incorporates a load beam. The flexible wiring board is disposed along the load beam. The flexible wiring board includes: first and second lines for connecting a write element that the...

20060092573 - Latch system of hard disk drive and method of forming the latch system: A latch system for a hard disk drive and a method of forming the latch system are disclosed. The latch system includes an actuator on which a read/write head is installed, and a latch locking the actuator. The actuator and the latch each has a mass center and a pivot...

20060092574 - Actuator assembly having optimized 4-bar linkage type actuator arm, hard disk drive employing the same, and method for optimizing shape of opening formed in actuator arm: An actuator arm of an actuator assembly includes a 4-bar linkage structure defined by a trapezoidal shaped opening formed between a front end of the actuator arm and a pivot shaft. A first rounded extension portion and a second rounded extension portion are formed at two corners adjacent to the...

20060092575 - Magnetic head and magnetic disk storage apparatus mounting the same: Embodiments of the invention provide a magnetic head which assures an improved format efficiency without increase in the magnetic field intensity applied at a read element. In one embodiment, a magnetic head incorporates a write head having a main pole and an auxiliary pole, and a read head having a...

20060092576 - Magnetic head for high speed data transfer: A read head having superior high frequency response characteristics is needed to achieve high-speed data transfer. Further, in perpendicular magnetic recording, since the read signal has a rectangular waveform, the harmonic components must be properly reproduced, requiring a read head having further improved high frequency read characteristics. A feature of...

20060092577 - Magnetoresistive effect element, magnetic head, and magnetic recording device: The magnetoresistive effect element comprises an electrode layer 12 of a crystalline material; a base layer 14 of a conductive amorphous material formed over the electrode layer 12, an antiferromagnetic layer 18 of a crystalline material formed over the base layer 14, a ferromagnetic layer 20 formed over the antiferromagnetic...

20060092580 - Current-perpendicular-to-the-plane (cpp) magnetoresistive sensor with improved antiparallel-pinned structure: A current-perpendicular-to-the-plane spin-valve (CPP-SV) magnetoresistive sensor has an improved antiparallel (AP) pinned structure. The AP-pinned structure has two ferromagnetic layers separated by a nonmagnetic antiparallel coupling (APC) layer and with their magnetization directions oriented antiparallel. One of the ferromagnetic layers in the AP-pinned structure is the reference layer in contact...

20060092582 - Cpp sensor having hard bias stabilization placed at back edge of the stripe: A current perpendicular to plane (CPP) having hard magnetic bias layers located at the back of the sensor, opposite the air bearing surface. The bias layer is magnetostatically coupled with the free layer to bias the free layer in a desired direction parallel with the ABS. First and second magnetic...

20060092581 - Stitching of afm and channeling layers for in-stack biasing cpp: The series resistance of a CPP read head having in-stack biasing has been reduced by stitching the AFM layer through a high conductance layer. Both the AFM and high conductance layers have significantly larger cross-sectional areas than the high conductance layer of prior art structures so the contribution, to the...

20060092578 - Ap1 layer for tmr device: A TMR read head with improved voltage breakdown is formed by laying down the AP1 layer as two or more layers. Each AP1 sub-layer is exposed to a low energy plasma for a short time before the next layer is deposited. This results in a smooth surface, onto which to...

20060092579 - Magnetoresistive element, thin-film magnetic head, head gimbal assembly, head arm assembly and magnetic disk drive: An MR element comprises: a tunnel barrier layer having two surfaces that face toward opposite directions; a free layer disposed adjacent to one of the surfaces of the tunnel barrier layer and having a direction of magnetization that changes in response to an external magnetic field; and a pinned layer...