Dynamic magnetic information storage or retrieval inventions 05/08

20080123208 - Method for optimizing parameter of information storage apparatus: A method is used for optimizing a parameter of an processing unit. The method is for providing an initial input Fi=0 to be a value of the parameter, and detecting a corresponding initial output O(Fi=0), determining step value ΔF, providing a first input F0−ΔF and a second input F0+ΔF, detecting... Agent: PCe Industry, Inc. Att. Cheng-ju Chiang

20080123209 - Magnetic recording medium, recording/reproducing apparatus, and stamper: A rotary-type magnetic recording medium has servo patterns formed in servo pattern regions on a substrate by patterns including recording regions and non-recording regions. Burst signal units composed of the recording regions or the non-recording regions are formed in burst pattern regions in the servo pattern regions. The burst signal... Agent: Greenblum & Bernstein, P.L.C

20080123210 - Handling synchronization errors potentially experienced by a storage device: Embodiments of the present invention pertain to handling synchronization errors potentially experienced by a storage device. According to one embodiment, a system for handling synchronization errors potentially experienced by a storage device includes a joint detector and a decoder. The joint detector detects transmitted data. The joint detector also detects... Agent: Hitachi C/o Wagner Blecher LLP

20080123211 - Solid state device pattern for non-solid state storage media: A method and apparatus for receiving data at a non-solid state storage device, which includes a store cache and a storage medium. The received data is written to the store cache and transferred from the store cache to the storage medium. In response to receiving a signal at the storage... Agent: Seagate Technology LLC C/o Westman Champlin & Kelly, P.A.

20080123212 - Head ic, read circuit and medium storage device: A head IC adjusts an amplitude level of a read signal of a head to adjust dispersion of the output characteristic of the head and to adjust the read signal within the input dynamic range of the AGC of a read channel. An AGC amplifier is installed in a head... Agent: Greer, Burns & Crain

20080123216 - Disk drive and calibration method therefor: Embodiments of the present invention help to prevent destabilization in voice coil motor (VCM) velocity control. According to one embodiment, a hard disk controller/multiprocessing unit (HDC/MPU) calibrates a correction operational coefficient of a detected back electromotive force (EMF) voltage before unloading. The calibration is carried out in a state that... Agent: Townsend And Townsend And Crew LLP

20080123213 - Multi-arm disk drive system having interleaved read/write operations and method of controlling same: A hard disk drive system that includes one or more rotating data storage platters, a drive controller and multiple actuator assemblies and corresponding respective read/write heads. The actuator assemblies are separately movable for performing separate data seeks. The controller is configured to interleave the seek and read/write operations of the... Agent: Downs Rachlin Martin PLLC

20080123214 - Non-contact measurement of slider fly height by electrostatic force: In a system and method for a non-contact measurement of the fly height of a slider above a magnetic data storage medium using electrostatic force, a slider with a read/write head flies over a magnetic data storage medium. A series of distinct voltages are applied between the slider and the... Agent: Kenyon & Kenyon LLP

20080123215 - Process for producing hard disk device, process for adjusting flying height of magnetic head, and hard disk device: A process for producing a hard disk device which is capable of producing a hard disk device having an excellent electromagnetic conversion characteristic at a high yield, and a process for adjusting flying height of a magnetic head having excellent reliability which is capable of improving the electromagnetic conversion characteristic... Agent: Sughrue Mion, PLLC

20080123217 - Storage apparatus, storage medium, and control method and program of storage apparatus: In a storage medium to which information is recorded by using a write head of an inductive type, in addition to a servo section in which servo information is recorded and a data section to which data is to be written, a write training section on which training write of... Agent: Greer, Burns & Crain

20080123218 - Mobile hard disk: A mobile hard disk, having a shield, a disk body having a front surface, an electric circuit board electrically connected to the disk body. The electric circuit board is parallel to and contacts with the front surface of the shield, wherein the electric circuit board and the disk body are... Agent: Wpat, PC Intellectual Property Attorneys

20080123219 - Light delivery technique for heat assisted magnetic recording head: An apparatus includes a load beam, a slider coupled to the load beam by a gimbal assembly and including an optical transducer, an optical fiber for transmitting light directly toward the transducer, and a mounting structure for adjusting the position of an end of the optical fiber. Data storage devices... Agent: Pietragallo Gordon Alfano Bosick & Raspanti, LLP

20080123220 - Head slider and storage medium drive: A first rail is formed on a medium-opposed surface in a head slider. A head element is embedded in the first rail. Second rails are formed on the medium-opposed surface at positions upstream of the head element. Negative pressure generating areas is defined at positions downstream of the second rail.... Agent: Greer, Burns & Crain

20080123221 - Gimbal with asymmetric dynamic properties: In a suspension in a hard disk drive, a gimbal with asymmetric dynamic properties, in which the two halves of the gimbal may have different stiffness distribution or inertia distribution. Structural difference between the two halves, or materials with different stiffness, may cause the different stiffness distribution or inertia distribution.... Agent: Kenyon & Kenyon LLP

20080123222 - Superparamagnetic field sensing devices: A ferromagnetic thin-film based magnetic field sensor having an electrically insulative intermediate layer with two major surfaces on opposite sides thereof with an initial film of an anisotropic ferromagnetic material on one of those intermediate layer major surfaces and a superparamagnetic thin-film on the remaining one of said intermediate layer... Agent: Kinney & Lange, P.A.

20080123224 - Magnetoresistive element, magnetic head, and magnetic recording apparatus: A magnetoresistive MR element 10, which is constituted by allocating a magnetic layer 22a, 22b between a sensing layer (free-magnetic layer) 11 whose magnetization rotates in response to an external magnetic field, and a bias application layer 15a, 15b for applying a bias magnetic field to the sensing layer (free-magnetic... Agent: Greer, Burns & Crain

20080123223 - Tunneling magnetic sensor including tio-based insulating barrier layer and method for producing the same: A tunneling magnetic sensor has a multilayer part including, from bottom to top, a pinned magnetic layer, an insulating barrier layer, and a free magnetic layer. The insulating barrier layer is formed of titanium magnesium oxide (TiMgO) and contains magnesium in an amount of about 4 to 20 atomic percent... Agent: Brinks Hofer Gilson & Lione

20080117538 - Multi-register read channel optimization: A method for optimizing read/write channel parameters of a hard disk drive. The process includes measuring a first bit error rate of a head using an initial set of read/write channel parameters and varying all of the read/write channel parameters with a random jump. The random jump may be created... Agent: Irell & Manella LLP

20080117540 - Vibration detector for hard disk drives: A hard disk drive with a circuit that provides a control signal to a voice coil motor to move a head across a disk. The disk drive includes a circuit that provides a control signal to the voice coil motor to move the head. The circuit also has a state... Agent: Irell & Manella LLP

20080117541 - Written-in repeatable run-out correction for hard disk drives: A hard disk drive with a circuit that provides a control signal to a voice coil motor to move a head across a disk. The circuit includes a repeatable run-out estimator in a feed forward control loop to control the movement of the head. The repeatable run-out estimator compensates for... Agent: Irell & Manella LLP

20080117539 - Tape cartridge having tape media with longitudinally shifted servo pattern for increased sampling rate: A magnetic tape cartridge including magnetic tape with servo information is provided. The servo information comprises a plurality of parallel longitudinal servo bands that lie between a plurality of longitudinal data bands. The plurality of servo bands include odd servo bands and even servo bands, wherein each of the odd... Agent: International Business Machines Corporation

20080117542 - Method and system for providing a longitudinally shifted servo pattern for increased sampling rate: A method and a system are provided for writing a plurality of servo bands on magnetic tape. The magnetic tape is moved longitudinally relative to at least one servo write head. The servo write head is positioned to write a plurality of parallel longitudinal servo bands. The plurality of servo... Agent: International Business Machines Corporation

20080117543 - Tape drive for maintaining lateral position utilizing longitudinally shifted servo pattern with increased sampling rate: A tape drive and a method of using a tape drive is provided. The tape drive includes a head assembly including at least a first and a second servo read element configured to detect transition stripes of a servo pattern on tape media. The first servo read element is configured... Agent: International Business Machines Corporation

20080117544 - Magnetic recording medium, method for manufacturing the same, and magnetic recording apparatus: According to one embodiment, a magnetic recording medium includes a substrate, and a magnetic recording layer formed on the substrate and having patterns of protrusions and recesses corresponding to a servo area and a recording area, in which the magnetic recording layer located in each of the recesses in the... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20080117545 - Data storage system with field assist source: A system including a recording head that includes a magnetic pole and a field assist source positioned adjacent the magnetic pole. The system further includes a recording medium positioned adjacent the recording head. In one aspect, the recording medium includes a magnetic recording layer wherein the magnetic recording layer has... Agent: Pietragallo Gordon Alfano Bosick & Raspanti, LLP

20080117546 - Perpendicular magnetic recording write head with flux-conductor contacting write pole: A perpendicular magnetic recording write head has a flux conductor in contact with the write pole. The flux conductor is substantially wider than the write pole tip in the cross-track direction and has a blunt end that is recessed from the pole tip end. The region of the flux conductor... Agent: Thomas R. Berthold

20080117547 - Pivotable head brush assembly for cleaning read/write heads in a media tape drive: One embodiment of a threader assembly for a tape drive has a retractable head brush assembly that is articulated into and out of wiping contact with the tape head. The head brush assembly is integrated into the cartridge loading assembly such that some of the same components used to load... Agent: Bracewell & Patterson, L.l.p.

20080117548 - Storage device and storage system: A storage device includes a drive selection section (1), a hard disk drive (HDD) (2), and a non-volatile memory drive (3). When an instruction such as a data I/O instruction is issued from a host such as a CPU (5) and an ATA controller (6) to the hard disk drive... Agent: Reed Smith LLP

20080117549 - Reducing the probability of a slider contacting a surface of a disk: Embodiments of the present invention pertain to reducing the probability of a slider contacting a surface of a disk. According to one embodiment, a first etch is performed on the slider. Air compression mechanisms are created near each comer associated with a trailing edge of the slider so that the... Agent: Hitachi C/o Wagner Blecher LLP

20080117550 - Air bearing surface method and apparatus optimizing flying height on demand efficiency during flying height on demand activity of slider in a hard disk drive: A slider including air bearing surface with Flying height On-Demand (FOD) protrusion with method of controlling airflow to maximize FOD efficiency as ratio of change in vertical position to protrusion height. Slider including means for controlling the air flow to maximize FOD efficiency and/or including specific means for minimizing an... Agent: Gregory Smith & Associates

20080117551 - Flat surface air bearing assembly: An air bearing assembly includes: an upper portion having a plurality of air supply and vacuum holes therethrough; a lower portion; and a plurality of spacers disposed between and maintaining the upper and lower portions in spaced relation, wherein a density of the air supply and vacuum holes is high... Agent: Corning Incorporated

20080117552 - Enhanced hard bias in thin film magnetoresistive sensors with perpendicular easy axis growth of hard bias and strong shield-hard bias coupling: A hard bias (HB) structure for longitudinally biasing a free layer in a MR sensor is disclosed that is based on HB easy axis growth perpendicular to an underlying seed layer which is formed above a substrate and along two sidewalls of the sensor. In one embodiment, a conformal soft... Agent: Stephen B. Ackerman

20080117554 - Magneto-resistive effect device, thin-film magnetic head, head gimbal assembly, and hard disk system: The invention provides a giant magneto-resistive effect device having a CPP structure comprising a spacer layer, and a fixed magnetization layer and a free layer stacked one upon another with said spacer layer interposed between them, wherein the free layer functions such that its magnetization direction changes depending on an... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.c.

20080117553 - Current-perpendicular-to-the-plane (cpp) magnetoresistive sensor with improved ferromagnetic free layer structure: A current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor has an improved free layer structure that includes a first ferromagnetic interface layer on the sensor's nonmagnetic spacer layer, a first electrically conductive interlayer on the first interface layer, a central ferromagnetic NiFe alloy free layer on the first interlayer, a second electrically conductive... Agent: Thomas R. Berthold

20080112071 - Method for correcting added and lost bits in a hard disk drive using error correction codes: A hard disk drive with an encoder that writes data onto a disk in accordance with a plurality of first codes. Each code contains a plurality of digital bits. The first codes are selected so that if a bit is added or dropped during a write or read process the... Agent: Irell & Manella LLP

20080112072 - Data storage device and data erase method: A data storage device with a recording medium for which a data erase function unit is introduced to achieve both partial non-erasure of data for analyzing a cause of data error and full erasure of data for protection of personal information. This data erase function unit sequentially performs automatic erasure... Agent: Staas & Halsey LLP

20080112073 - Apparatus, system, and method for repeatable runout cancellation: An apparatus, system, and method are disclosed for the cancellation of repeatable runout signals. A signal processing module receives a position error signal and outputs a position compensated signal. A feed forward module receives the position error signal and outputs one or more cancellation signals to cancel one or more... Agent: Powell And Associates

20080112074 - Apparatus and method for reducing particle accumulation in a hard disk drive: A disk drive spoiler for reducing particle accumulation in a hard disk drive is provided. The spoiler includes a body portion for directing airflow generated by a rotating disk, the rotating disk comprising a middle diameter and an outer diameter wherein the body portion directs airflow away from the outer... Agent: Hitachi C/o Wagner Blecher LLP

20080112075 - Tempreature control apparatus for a hard disk drive and a method of varying the temperature of hard drive: The invention provides a temperature control apparatus for a hard disk drive, the apparatus comprising: a thermal chamber for receiving a hard disk drive; and an oscillatory air movement generator for generating air movement within a region between the thermal chamber and a said hard disk drive when received in... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20080112076 - Magnetic spacing and tape characteristic compensation system and method: A magnetic head according to one embodiment includes a reader and a thermal sensor for detecting a thermal effect thereon from a magnetic medium passing by the thermal sensor. A tape drive system according to one embodiment includes a magnetic head for reading data from a magnetic tape, a thermal... Agent: Zilka-kotab, Pc- Ibm

20080112077 - Multi-channel head and method for manufacturing the same: A multi-channel head includes at least one head chip. The head chip has a plurality of elements and at least one bonding interface, and the head chip has at least one element on one side of the bonding interface and at least one element on the other side of the... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.c.

20080112078 - Write head with self-cross biased pole for high speed magnetic recording: A magnetic write head having a magnetic cross yoke arranged to provide a cross magnetic field in a pole tip region of the magnetic head. The cross field, which is perpendicular to the magnetization of write pole, reduces the switching time of the write field, thereby increasing the speed with... Agent: Zilka-kotab, Pc- Hit

20080112079 - Perpendicular magnetic recording system with patterned medium and manufacturing process for the medium: A patterned perpendicular magnetic recording medium of the type that has spaced-apart pillars with magnetic material on their ends and with nonmagnetic trenches between the pillars is made with a method that allows use of a pre-etched substrate. The substrate has a generally planar surface at the trenches and comprises... Agent: Thomas R. Berthold

20080112080 - Magnetic write head employing multiple magnetomotive force (mmf) sources: A write head for perpendicular magnetic recording having a write pole and first and second return poles. The write head can include a first magnetomotive force source for delivering a magnetomotive force to the first return pole and the write pole and a second magnetomotive force source for delivering magnetomotive... Agent: Zilka-kotab, Pc- Hit

20080112081 - Perpendicular magnetic write head, method of manufacturing the same, and magnetic recording apparatus: The present invention provides a perpendicular magnetic write head capable of preventing unintended erasure of information due to spread of a magnetic field for writing. A leading shield, two side shields, and a trailing shield are disposed around (a front end portion of) a main magnetic pole layer. A nonmagnetic... Agent: Oliff & Berridge, Plc

20080112082 - Four sided shield structure for a perpendicular write head: The traditional single pole perpendicular writer has two major problems—insufficient field gradient in the down track direction and adjacent track erasure (ATE) caused by side fringing fields. These problems have been overcome by tapering the main pole and then shielding it on all four sides.... Agent: Saile Ackerman Llc

20080112083 - Item pivotally connected to a support: An implement, comprising a working portion which can be selectively exposed for use or covered when not in use, is pivotally connected to a support. Upon actuation of a release, the implement automatically moves from a first configuration wherein the working end is disposed at least partially within a support,... Agent: Daniel P. Burke, Esq. Daniel P. Burke & Associates, Pllc

20080112084 - Head having a transducer heater and an air bearing surface with a flow-diversion dam and pressure-relief trough disposed upstream of the transducer: A head for use in an information storage device includes a novel ABS, and a transducer with a heating element. The ABS includes a transducer pad that includes a surface in a first plane. The ABS also includes a pressure-relief trough that is recessed from the first plane by at... Agent: Western Digital Technologies, Inc. Attn: Renee M. Quick

20080112085 - Write through drivers for disk drive systems: Circuits and methods are provided for write through drivers in disk drive systems. A write through driver is a transceiver that includes a write driver circuit and a receiver circuit. The write driver drives a current signal to a write element through a first conductive interconnect. The write element writes... Agent: Steven J. Cahill/ Hitachi Gst

20080112086 - Slider with an air bearing surface having a inter-cavity dam with od and id dam surfaces of different heights: A head for use in a magnetic hard disk drive or other information storage device includes a novel ABS. The novel ABS includes an inter-cavity dam that is disposed between at least a portion of a cavity and a trailing pad. The inter-cavity dam is spaced longitudinally from the trailing... Agent: Western Digital Technologies, Inc. Attn: Renee M. Quick

20080112087 - Wamr writer with an integrated spin momentum transfer driven oscillator for generating a microwave assist field: An apparatus comprises a write pole, a return pole, a wire positioned between the write pole and the return pole, a first free layer, and a first interlayer positioned between the write pole and the first free layer.... Agent: Pietragallo Gordon Alfano Bosick & Raspanti, LLP

20080112088 - Perpendicular magnetic write head having a wrap around trailing shield with a flux return path: A magnetic write head for perpendicular magnetic recording that has write pole, a return pole and a trailing shield that is magnetically connected with magnetic return pole. The write head includes a magnetic pedestal and first and second magnetic studs that connect the trailing shield with the pedestal. The studs... Agent: Zilka-kotab, Pc- Hit

20080112089 - Seed/afm combination for ccp gmr device: Improved CPP GMR devices have been fabricated by replacing the conventional seed layer (typically Ta) with a bilayer of NiCr on Ta, said seed being deposited on the NiFe layer that constitutes a magnetic shield. Additional improvement was also obtained by replacing the conventional non-magnetic spacer layer of copper with... Agent: Saile Ackerman Llc

20080112091 - Current-confined-path type magnetoresistive element and method of manufacturing same: A spacer layer of an MR element includes: a nonmagnetic metal layer disposed on a pinned layer; a protection layer disposed on the nonmagnetic metal layer to prevent oxidation or nitriding of the nonmagnetic metal layer; an island-shaped insulating layer disposed on the protection layer; and a coating layer covering... Agent: Oliff & Berridge, Plc

20080112090 - Magnetic recording head with overlaid leads: A lead overlay design of a magnetic sensor is described with sensor and free layer dimensions such that the free layer is stabilized by the large demagnetization field due to the shape anisotropy. In one embodiment the giant magnetoresistive (GMR) effect under the leads is destroyed by removing the antiferromagnetic... Agent: Marlin Knight

20080112094 - High speed low power annular magnetic devices based on current induced spin-momentum transfer: A high speed and low power method to control and switch the magnetization direction and/or helicity of a magnetic region in a magnetic device for memory cells using spin polarized electrical current. The magnetic device comprises a reference magnetic layer with a fixed magnetic helicity and/or magnetization direction and a... Agent: Darby & Darby P.c.

20080112095 - Dual current-perpendicular-to-the-plane (cpp) magnetoresistive sensor with heusler alloy free layer and minimal current-induced noise: A dual current-perpendicular-to-the-plane (CPP) magnetoresistive sensor has a free ferromagnetic layer formed of a Heusler alloy and each of the pinned ferromagnetic layers formed of a ferromagnetic material other than a Heusler alloy, like a conventional CoFe or NiFe material. The Heusler alloy material in the free layer may be... Agent: Thomas R. Berthold

20080112096 - Magneto-resistive effect device, thin-film magnetic head, head gimbal assembly, and hard disk system: If the device can have a suitable area resistivity and a high MR ratio, it is then possible to obtain more stable output power in low current operation than ever before, and extend the service life of the device as well. The device is also lower in resistance than a... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.c.

20080112092 - Method and apparatus for oxidizing conductive redeposition in tmr sensors: A method and apparatus for oxidizing conductive redeposition in TMR sensors is disclosed. A TMR barrier layer is etched. Redeposition material is oxidized and the barrier is healed using an oxidizing agent selected from the group consisting of ozone and water vapor.... Agent: David W. Lynch Chambliss, Bahner & Stophel

20080112093 - Tunneling magnetoresistance (tmr) device, its manufacture method, magnetic head and magnetic memory using tmr device: A barrier layer is disposed over a pinned layer made of ferromagnetic material having a fixed magnetization direction, the barrier layer having a thickness allowing electrons to transmit therethrough by a tunneling phenomenon. A first free layer is disposed over the barrier layer, the first free layer being made of... Agent: Greer, Burns & Crain

20080106815 - Disk apparatus capable of determining failure of spindle motor: A control portion instructs supply of an offset voltage while a disk remains stopped at the time of start. While the disk remains stopped at the time of start, a differential operational amplifier detects a voltage difference between a first voltage supply line and a second voltage supply line. When... Agent: Osha Liang L.L.P.

20080106816 - Method for improving sequence detection performance by removing excess paths: A method leverages knowledge of the actual or ideal bit sequence to improve the performance of any sequence detector. This improved performance results by constraining the sequence detector when the sequence detector has knowledge of known patterns within the sample sequence. Embodiments may control or limit the effects of ISI... Agent: Garlick Harrison & Markison

20080106817 - Multiple sinusoidal seek servo system for reducing seek acoustics and seek time in hard disk drives: A hard disk drive that includes a voice coil motor controlled by a servo. The servo provides a driving signal that has multiple sinusoidal waveforms. The multi-sinusoidal waveforms minimize seek time and vibrations in the drive.... Agent: Irell & Manella LLP

20080106818 - Air bearing design with a flatter pitch profile for reducing particle tas: An embodiment of the present invention is an ABS design with a pitch ladder feature. This embodiment has an air flow squeezing channel which consists of one airflow blocker and three etching steps. The airflow blocker can be used to limit the incoming air flow from the leading edge of... Agent: Kenyon & Kenyon LLP

20080106819 - Magnetic disc unit with gap between magnetic disc and shroud: A magnetic disc unit includes a rotating disc type magnetic disc, a head for recording and reproducing data to and from the magnetic disc, and a head support mechanism for supporting the head. The magnetic disc unit includes a shroud surrounding an outer periphery of the magnetic disc other than... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080106820 - Magnetic head structure and its manufacturing method: In a magnetic head structure that forms a medium facing surface of a head element unit by polishing processing, a height monitor that is exposed in the vicinity of the head element unit during the polishing processing to index the height of the head element unit is provided in a... Agent: Brinks Hofer Gilson & Lione

20080106821 - Patterned magnetic recording medium: Provided is a patterned magnetic recording medium including a plurality of magnetic recording layers arranged at predetermined regular intervals on a substrate, wherein the magnetic recording layers are multi-layered and comprise a means of suppressing magnetic interaction between the magnetic recording layers. The magnetic recording layer includes a first ferromagnetic... Agent: Sughrue Mion, PLLC

20080106822 - Method for reducing off-track gain for a disk drive actuator: The dynamics of a disk drive actuator are enhanced by redistributing the mass and stiffness of the structure. The two nodal points of the second primary bending mode of the actuator are relocated to positions that are both radially outboard of their original positions. One nodal point is positioned as... Agent: Bracewell & Giuliani LLP

20080106824 - Micro-actuator, head gimbal assembly and disk drive unit with the same: A micro-actuator for a HGA includes a frame having a pair of side arms and a connection plate that interconnects the two side arms at one end thereof; a PZT element attached to at least one of the side arms; and an electrical connection shifting device to connect with the... Agent: Nixon & Vanderhye, PC

20080106823 - Systems and methods for identifying problems with pzt elements of micro-actuators: Systems and methods for identifying problems with PZT elements of micro-actuators are provided. In certain example embodiments, a voltage (e.g., a sine voltage) may be applied to a reference unit causing it as well as a test unit to vibrate. Characteristics of the respective resonances (e.g., frequency, amplitude, phase, etc.)... Agent: Nixon & Vanderhye, PC

20080106825 - Current-perpendicular-to-plane magnetoresistance effect device with double current control layers: A magnetoresistance effect element of the dual spin valve type using a current-perpendicular-to-the-plane (CPP) system where a sensing current flows perpendicular to the stacked faces of a plurality of conductive layers, the magnetoresistance effect element comprises a first unit which includes a free layer and a first pinning layer, a... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20080106826 - Current-perpendicular-to-plane magnetoresistance effect device with double current double layers: A magnetoresistance effect element of the dual spin valve type using a current-perpendicular-to-the-plane (CPP) system where a sensing current flows perpendicular to the stacked faces of a plurality of conductive layers, the magnetoresistance effect element comprises a first unit which includes a free layer and a first pinning layer, a... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20080106827 - Magneto-resistive effect device, thin-film magnetic head, head gimbal assembly, and hard disk system: The invention provides a CPP-GMR device comprising a spacer layer. The spacer layer comprises a first nonmagnetic metal layer and a second nonmagnetic metal layer, each formed of a nonmagnetic metal material, and a semiconductor layer interposed between the first nonmagnetic metal layer and the second nonmagnetic metal layer, and... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.c.

20080106828 - Anti-parallel tab sensor fabrication: A method for fabricating a sensor having anti-parallel tab regions. The method includes forming a free layer having tab areas on opposite sides of an active area, forming a first layer of a carbon composition above the active area of the free layer, the first layer of carbon being substantially... Agent: Zilka-kotab, PC- Hit

20080100941 - Apparatus and method for content management of a portable device: A content-management apparatus of a portable device. The apparatus includes a display unit to display content by time and function in a content area having a time axis and a function axis, and a content generation unit to combine at least two sets of content.... Agent: Stein, Mcewen & Bui, LLP

20080100943 - Apparatus and method for internal calibration of normalized playback transfer curve in a hard disk drive: Method calibrates an assembled hard disk drive for read head accessing rotating disk surface, by estimating non-linearity of that playback device based on two data patterns, which have a short transition-pair waveform and a long transition-pair waveform. By linearly constructing a simulated long transition-pair waveform from the short transition-pair waveform... Agent: Gregory Smith & Associates

20080100942 - Method and system for distinguishing spatial and thermal defects on perpendicular media: Disclosed are a method and system for distinguishing spatial and thermal defects on perpendicular media. The magnetic domains of the perpendicular media are oriented to have a first polarity, scanned using a read head, oriented to have a second polarity and scanned again. The signals from the read head are... Agent: Townsend And Townsend And Crew, LLP

20080100945 - Formatted storage media providing space for encrypted text and dedicated space for clear text: A storage library is provided for formatting a mobile data storage element, such as a tape, with a first space dedicated for clear text or text as received by a host, such as an Independent Software Vender, wherein the first space is intended to accommodate header information which includes attributes... Agent: Spectra Logic C/o Hiscock & Barclay, LLP

20080100946 - Apparatus, system, and method for redundant identification of a storage medium format: An apparatus, system, and method are disclosed for redundant identification of a storage medium format. The apparatus for redundant identification of a storage medium format is provided with a plurality of modules configured to functionally execute the necessary steps of writing a Format Identification Data Set (“FID”) to a plurality... Agent: Kunzler & Mckenzie

20080100947 - Magnetic recording and playback method and magnetic recording and playback apparatus: A magnetic recording and playback apparatus that is configured to carry out recoding on and playback of a tape-like recording medium using a magnetic head mounted on a rotating drum by employing helical scanning is provided. The apparatus includes a multi recording head configured to record a plurality of tracks... Agent: Robert J. Depke Lewis T. Steadman

20080100948 - Apparatus, system, and method for measuring magnetoresistive head resistance: An apparatus, system, and method are disclosed for measuring magnetoresistive head assembly resistance. A measurement module measures a reference voltage across a reference resistance while applying a reference current to the reference resistance. In addition, the measurement module measures a test voltage across a first biasing resistor, a MR head... Agent: Kunzler & Mckenzie

20080100949 - Automatic stop mechanisms for tape recorders: Disclosed is an automatic stop mechanism for a tape recorder comprising a circular member having a driving pin, a swing member hinged onto a main board of the recorder, a driving member which can make the swing member push a locking level to move transversely, and a torsion spring member... Agent: Morgan Lewis & Bockius LLP

20080100950 - Control device, control method, and storage apparatus: Upon recording, a clearance control unit performs preheating by an added control value (B+R) of a base heater control value B and an adjustment heater control value R and switches that to merely the base heater control value B when it reaches a target sector so as to perform write.... Agent: Greer, Burns & Crain

20080100951 - Head controller, storage device, and head controlling method: A level peak-acquiring unit acquires a peak of a signal level during a calibration wherein a heater power is increased from zero to a predetermined power. A sample acquiring unit acquires in a sampling range, a sample of a combination of the heater power and the signal level. A linear... Agent: Greer, Burns & Crain

20080100952 - Detection and measurement of position error signal linearity in timing based servo patterns using differential nonlinearity: Systems, computer implemented methodology, and computer readable media for measuring position error signal differential nonlinearity in timing based servo patterns. A set of two or more reading heads, positioned at various locations along a servo stripe and orientated transverse to the longitudinal motion of the tape, collect PES data concerning... Agent: Hogan & Hartson LLP

20080100954 - Control method to reduce settle tmr in hard disk drives: A hard disk drive with a circuit that provides a control signal to a voice coil motor to move a head across a disk of a drive. The circuit includes a state estimator that provides a plurality of state estimates and a disturbance estimator that provides a disturbance estimate that... Agent: Irell & Manella LLP

20080100953 - Feedforward compensator for induced vibration: A feedforward compensator for induced vibration is disclosed. Controlled motions in an actuator induce mechanical disturbances in a surrounding cabinet. The feedforward compensator allows such disturbances to be compensated for without the need of a vibration sensor. The compensator provides a feedforward compensation signal configured to compensate for a mechanical... Agent: Seagate Technology LLC C/o Westman Champlin & Kelly, P.A.

20080100955 - Higher-order state estimator for low tmr in hard disk drives: A hard disk drive with a servo circuit that provides a control signal to a voice coil motor to perform a servo to align a head with a disk track of the drive. The servo circuit includes a fifth order state estimator that provides five estimates that are used to... Agent: Irell & Manella LLP

20080100956 - Seek adaptation system in hard disk drives: A hard disk drive with a voice coil motor circuit that provides a current to a voice coil motor to perform a seek routine in a seek time. The disk drive includes a temperature sensor to sense a temperature of the disk drive and a voltage sensor to sense the... Agent: Irell & Manella LLP

20080100957 - Media separator plate with multiple features: A media separator plate is provided having a plate main body and a shroud. The plate main body has a continuous, non-interrupted inner circumference and a continuous, non-interrupted outer circumference. The plate main body extends from the inner circumference to the outer circumference and includes a top surface and a... Agent: Seagate Technology LLC C/o Westman Champlin & Kelly, P.A.

20080100944 - Head ic, read circuit, and media storage device: A head IC adjusts an amplitude level of head read signals with regard to scattering in head output characteristics, so as to conform to the input dynamic range of the read channel AGC. An AGC amplifier is provided in a head IC connected to a read channel, and the feedback... Agent: Greer, Burns & Crain

20080100958 - Two-plane balance for spindle motors: In a spindle hub configured for rotation about an axis, through holes extend from a first end of the spindle hub to a second end of the spindle hub. The through holes are generally parallel to the axis. A method of achieving two-plane balance of a disc pack assembly by... Agent: Seagate Technology LLC C/o Novak Druce & Quigg LLP

20080100959 - Magnetic write head having a shield that extends below the leading edge of the write pole: A magnetic write head for perpendicular magnetic recording that has a write pole and a trailing or side shield that has a leading edge that extends to or beyond the leading edge of write pole, thereby ensuring complete side magnetic shielding. The write head can be formed by forming the... Agent: Zilka-kotab, PC- Hit

20080100961 - Multi-channel head: A multi-channel head includes a substrate and a plurality of recording elements arranged on the substrate in a track width direction. At least one of the recording elements satisfies BGW<PW and BGD>BGW, where PW represents a pole width, BGW and BGD represent a width and a depth, respectively, of a... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080100960 - Wafer and insulation characteristic monitoring method: The present invention provides an insulation characteristic measuring method of measuring electrical insulation of magnetic head elements formed on a wafer. Each of the magnetic head elements includes an upper magnetic pole layer, a lower magnetic pole layer, insulation layers disposed between the upper and lower magnetic pole layers, and... Agent: Patrick G. Burns, Esq. Greer, Burns & Crain, Ltd.

20080100962 - Perpendicular magnetic recording medium, method of fabricating the same, and magnetic recording system: A crystallized ferromagnetic layer containing Fe, Co and/or Ni, formed as a polycrystalline ferromagnetic layer is used as a part of the anti parallel soft under layer (APS-SUL) structure in perpendicular media to reduce the thickness of the intermediate layer. The soft under layer structure consists of a non-magnetic spacer... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20080100963 - Data storage device using magnetic domain wall movement and method of operating the same: Provided are a data storage device using a magnetic domain wall movement and a method of operating the data storage device. The data storage device includes a magnetic layer which has a plurality of magnetic domains, a current applying unit which applies current for a magnetic domain wall movement to... Agent: Sughrue Mion, PLLC

20080100964 - Magnetic recording system with medium having antiferromagnetic-to- ferromagnetic transition layer exchange-coupled to recording layer: A magnetic recording disk drive has a bilayer recording medium of a high-anisotropy recording layer and an exchange-coupled antiferromagnetic-to-ferromagnetic (AF-F) transition layer. The transition layer has an AF-F transition temperature (TAF-F) that decreases relatively rapidly with increasing applied magnetic field. Thus the transition layer has a transition field HAF-F(T), which... Agent: Thomas R. Berthold

20080100965 - Manufacturing method of head gimbal assembly, head slider, and storage device: A head slider includes inside an alumina member, a first heater, a first resist, and a second heater entirely covered by a second resist shields. Another shield is arranged such that a predetermined surface of the other shield touches the second resist. The coefficient of thermal expansion of the second... Agent: Greer, Burns & Crain

20080100966 - Head slider and method of making the same and grinding apparatus for head slider: A head slider includes a non-magnetic insulating film overlaid on the outflow end surface of a slider body. A second protection film is overlaid on the surface of the non-magnetic insulating film. A heater is embedded in the non-magnetic insulating film to induce a protrusion of the non-magnetic insulating film.... Agent: Greer, Burns & Crain

20080100967 - Cooling of head actuator of disk device: A magnetic disk device includes a swing-type head actuator which is driven by a voice coil motor. The voice coil motor is cooled by an airflow generated when a magnetic disk accommodated in a disk accommodating unit of an enclosure is rotated by a spindle motor. An airflow dividing member... Agent: Greer, Burns & Crain

20080100969 - Magneto-resistance effect element including free layer having multilayer constitution including magnetic body mixed with element having 4f electrons: In an MR element constituted in such a manner that a pinned layer whose magnetization direction is fixed, a nonmagnetic spacer layer, and a free layer whose magnetization direction is changed according to an external magnetic field, are laminated in this order; the free layer has a multilayer constitution including... Agent: Knobbe Martens Olson & Bear LLP

20080100968 - Magneto-resistive effect device, thin-film magnetic head, head gimbal assembly, and hard disk system: The invention provides a giant magneto-resistive effect device (CPP-GMR device) having a CPP (current perpendicular to plane) structure comprising a spacer layer, and a fixed magnetization layer and a free layer stacked one upon another with the spacer layer interposed between them, with a sense current applied in a stacking... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080100970 - Current-perpendicular-to-the-plane (cpp) magnetoresistive sensor with impedance adjustment: A current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) read head structure has the MR read head located between first and second shields (S1, S2) on a substrate with a shunt resistor R1 connecting S1 to the substrate and a shunt resistor R2 connecting S2 to the substrate, with R1 and R2 being approximately... Agent: Thomas R. Berthold

20080100971 - Biosensor and sensing cell array using the same: A biosensor and a sensing cell array using a biosensor are disclosed. Adjacent materials containing a plurality of different ingredients are analyzed to determine the ingredients based on their magnetic susceptibility or dielectric constant. A sensing cell array includes such as a magnetization pair detection sensor including a MTJ (Magnetic... Agent: Townsend And Townsend And Crew, LLP