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Dynamic magnetic information storage or retrieval February patent applications/inventions, industry category 02/11

Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application.
02/24/2011 > patent applications in patent subcategories.

20110043938 - Systems and methods for fly-height control using servo data: Various embodiments of the present invention provide systems and methods for determining changes in fly-height. For example, various embodiments of the present invention provide storage devices that include a storage medium having servo data thereon. A read/write head assembly is disposed in relation to the storage medium. A servo based... Agent: Hamilton,desanctis & Cha (lsi)

20110043939 - Magnetic recording media with reliable writability and erasure: Methods and media structures are provided for increasing writability and reducing unintentional erasure of perpendicular magnetic recording media. Variable permeability is controlled within a thin soft underlayer (SUL) structure, independent of bulk SUL material properties such as magnetic moment (Bs) and magnetic anisotropy (Hk). Media with an improved combination of... Agent: Seagate Technology LLC C/o Murabito Hao & Barnes LLP

20110043940 - Erase drive system and methods of erasure for tape data cartridge: The present disclosure relates generally to writing and reading data from a magnetic tape storage media and, more particularly, to a secure erasure system for the eradication of the data contained in the data tracks of a tape media such that substantially all of the data can be erased while... Agent: Dorsey & Whitney LLP Intellectual Property Department

20110043941 - Energy assisted discrete track media with heat sink: A discrete track perpendicular magnetic recording (PMR) disk and a method of fabricating the disk are described. The PMR disk may include a heat sink layer disposed above a substrate, intermediate layers disposed above the heat sink layer, and a magnetic recording layer disposed above the intermediate layers. The magnetic... Agent: Western Digital Corporation Attn: Lesley Ning /IPLaw Department

20110043942 - Magnetic head slider and magnetic disc drive: The invention provides a magnetic head slider and a magnetic disc drive which can position at a high precision and in a simple manner. A magnetic head slider (4) includes a recording and reproducing element (20) writing and reading data, a heat generating element (21) arranged at least in one... Agent: Antonelli, Terry, Stout & Kraus, LLP

20110043943 - Microwave assisted magnetic recording head and microwave assisted magnetic recording apparatus: With respect to microwave assisted magnetic recording, high-density information recording is performed by forming a favorable write magnetic domain on a recording medium. The recording medium is placed in a magnetically resonant state by generating a microwave, and information is recorded. A recording medium 7 comprises parts 17 and 18... Agent: Antonelli, Terry, Stout & Kraus, LLP

20110043944 - Jerk detection for data storage device: A device comprising at least one sensor configured to sense disturbances applied to the data storage device and to generate signals based on the sensed disturbances, and a controller configured to receive the signals from the at least one sensor and to detect jerk events in the sensed disturbances based... Agent: Seagate Technology LLC C/o Westman, Champlin & Kelly, P.A.

20110043945 - Servomechanism with adjustable predictor filter: A digital control system, and in particular a tape drive system having a track-following servomechanism with a predictor (also referred to herein as a predictor filter), is described. In certain embodiments, the servomechanism includes an actuator, a servo channel, and a predictor coupled to the servo channel. The predictor receives... Agent: Van N. Nguy IBM Corporation, Almaden Research Center

20110043946 - Airflow diverter in a hard disk drive system: An airflow diverter in a hard disk drive system. A top portion configured to couple with a top housing of the disk drive system. A thickness configured to create a top clearance between the diverter and a top actuator arm of the disk drive system wherein the top clearance approximates... Agent: Hitachi C/o Wagner Blecher LLP

20110043947 - Magnetic recording/reproduction device: There is provided a magnetic recording/reproduction device which can appropriately supply lubricant to a metal-thin-film magnetic tape (1) containing no binder in a recording/reproduction surface even when the magnetic recording/reproduction device needs to be continuously performing recording/reproduction by using the magnetic tape (1) for a long time. The magnetic recording/reproduction... Agent: Hamre, Schumann, Mueller & Larson P.C.

20110043948 - Disk drive device with hub: The disk drive device includes a base member, a hub, a bearing unit which is arranged on the base member and which rotatably supports the hub, and a spindle drive unit which drives the hub to rotate. The spindle drive unit includes a stator core having a salient pole, a... Agent: Fulwider Patton LLP

20110043949 - Head gimbal assembly alignment with compliant alignment pin: This disclosure includes a system for aligning an unmounted head gimbal assembly (HGA) comprising a platform for a base plate of the HGA. The platform defines an X-Y plane. The system further comprises a compliant alignment pin extending beyond the platform in a Z-dimension perpendicular to the X-Y plane. The... Agent: Shumaker & Sieffert, P.A.

20110043950 - Tunneling magnetoresistive (tmr) read head with low magnetic noise: A tunneling magnetoresistance (TMR) device, like a TMR read head for a magnetic recording disk drive, has low magnetic damping, and thus low mag-noise, as a result of the addition of a ferromagnetic backing layer to the ferromagnetic free layer. The backing layer is a material with a low Gilbert... Agent: Thomas R. Berthold

02/17/2011 > patent applications in patent subcategories.

20110038071 - Method of operating pre-amplifier, pre-amplifier, and apparatuses including the same: A method of operating a pre-amplifier of a hard disk drive is provided. The method includes generating a comparison signal corresponding to a result of comparing a reference signal with a difference between differential signals corresponding to write data, and controlling transmission of the differential signals to a write head... Agent: Sughrue Mion, PLLC

20110038072 - Bpm recording with more than one dot per bit: Data storage systems are provided. Data storage systems illustratively include a recording head having a writing element and a bit patterned medium having a plurality of media dots. In some embodiments, the plurality of media dots pass the recording head at a media dot frequency. In some embodiments, the writing... Agent: Seagate Technology LLC C/o Westman, Champlin & Kelly, P.A.

20110038073 - Using readback signals to estimate radial location on a rotating storage device: Approaches for estimating the operating radius of a head in a hard-disk drive. These approaches may be used in a constant or approximately constant density servo scheme. Statistics, which describe the proportion of high frequency values to low frequency values in a readback signal read by the read/write head of... Agent: Mahamedi Paradice Kreisman LLP

20110038074 - Ramp for a hard disc drive: A moveable ramp arrangement having a traditional front side while the back side has an extended rotational park position used to support the read/write heads while the ramp is in the open position before and during disc installation.... Agent: Saile Ackerman LLC

20110038075 - Method to handle portable cassettes removeably disposed in a data storage library comprising a pass-through accessor: A method is provided to handle portable cassettes removeably disposed in a data storage library, wherein the method supplies a data storage library comprising a plurality of storage slots, and a plurality of portable cassettes removeably disposed a designated storage slot in a first alignment order, and a pass-through accessor... Agent: Dale F. Regelman Quarles & Brady, LLP

20110038076 - Disk drive and method of re-injecting low density gas in a hermetically sealed disk enclosure of a disk drive: A method for re-injecting low density gas into a disk drive including a hermetically sealed disk enclosure. The method includes providing a disk drive including a hermetically sealed disk enclosure. In addition, the method includes re-injecting low density gas from a hole penetrating the hermetically sealed disk enclosure from an... Agent: Hitachi C/o Wagner Blecher LLP

20110038077 - Multistage gasket: A gasket can be provided that provides good reworkability of a cover plate and a base plate of a hard disk device, provides sufficient adhesiveness of the gasket to a cover plate and a base plate even when used in a high humidity and temperature environment, and is prevented from... Agent: Sughrue Mion, PLLC

20110038078 - Integrated recording head with selective movement: A recording head for use in magnetic storage devices is disclosed. The recording head includes a transducer that is bi-directionally movable with respect to a surface of the magnetic storage medium, thereby enabling improved positioning of the transducer during recording head read and write operations. Various structures are disclosed to... Agent: Workman Nydegger 1000 Eagle Gate Tower

20110038079 - Perpendicular recording media with sublayers of oxide dopant magnetic materials: Perpendicular recording media with sublayers of dual oxide dopant magnetic materials are disclosed. The magnetic layer may comprise multiple sublayers of magnetic materials. In each sublayer, dual oxide dopants are incorporated. The compositions of the sublayers can be the same or different depending on the application. The magnetic layer may... Agent: Larson Newman & Abel, LLP

20110038080 - Perpendicular magnetic recording write head with spin torque oscillator for fast switching of write pole magnetization: A perpendicular magnetic recording write head that a write pole, an electrically conductive coil coupled to the write pole for generating magnetic flux in the write pole in the presence of electrical write current, and a spin torque oscillator (STO) that injects auxiliary magnetic flux to the write pole in... Agent: Thomas R. Berthold

20110038081 - Perpendicular magnetic recording system with spin torque oscillator and control circuitry for fast switching of write pole magnetization: A perpendicular magnetic recording hard disk drive includes a write head with a write pole and an electrically conductive coil coupled to the write pole, a write driver for supplying electrical write current to the coil to generate magnetic flux in the write pole, a spin torque oscillator (STO) that... Agent: Thomas R. Berthold

20110038082 - Combined cmp and etch planarization: A magnetic device having a magnetic feature, the magnetic feature including magnetic portions, a stop layer portion on each magnetic portion, and a region of non-magnetic material adjacent to the magnetic portions and the stop layer portions, where the stop layer portions define planar upper boundaries for the magnetic portions... Agent: Seagate Technology Outside Counsel Dergosits & Noah LLP

02/10/2011 > patent applications in patent subcategories.

20110032630 - Multi-mode loop adaptation scheme for high-density data recording channel: A circuit for a high-density data recording channel includes a first data detector, a second data detector, one or more multiplexers and a sequence identifier. The first data detector generates a first data detector output, and the second data detector generates a second data detector output. The multiplexers change between... Agent: James P. Broder Roeder & Broder LLP

20110032631 - Apparatus and methods of generating a test pattern of data, analysing a test pattern of data, and testing a data storage disk medium and/or a read/write head: A method of generating a test pattern of data to be written to a data storage disk medium for testing includes: rotating the disk; detecting fluctuations in the speed of rotation of the disk; producing a reference clock signal in accordance with the fluctuations so as to be synchronised with... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20110032632 - Timing recovery detector: A timing detector adapted for timing recovery on a read-channel is disclosed to improve signal quality of an input signal and maintain a small loop latency. The timing detector selects bits within the input signal that are high quality for timing recovery and discards bits that are low quality. The... Agent: Hensley Kim & Holzer, LLC

20110032634 - Control method and storage apparatus: A control method for information processing apparatus includes is provided. The control method includes receiving a lock instruction, locking a library device into a locked state at which insertion, removal and replacement of a medium in the library device is inhibited and/or prevented in response to the lock instruction, generating... Agent: Fujitsu Patent Center Fujitsu Management Services Of America, Inc.

20110032633 - Deflection reference adjustment for variable track pitch media: Apparatus and method for generating an analog waveform, such as a deflection signal used to deflect a write beam during the writing of data to a rotatable medium having a variable track pitch (TP). In accordance with various embodiments, a first digital to analog converter (DAC) is configured to output... Agent: Fellers, Snider, Blankenship, Bailey & Tippens, PC

20110032635 - Magnetic recording medium and method for manufacturing the same, and magnetic recording reproducing apparatus: A magnetic recording medium of the present invention includes, on a substrate (1), at least a magnetic layer (2) and a carbon protective layer (9) that covers the magnetic layer (2), wherein a convex part (7) serving as a magnetic recording area, and a concave part (6) serving as a... Agent: Sughrue Mion, PLLC

20110032636 - Enhanced head skew optimization for high speed disk access: A hard disk drive with multiple heads coupled to multiple disks. The disk drive switches between heads when writing or reading data to access different disk surfaces. As described above, there is a head skew time associated with switching heads. The disk drive includes a circuit that switches heads in... Agent: Irell & Manella LLP

20110032637 - Embedded track information for patterned media: A bit-patterned magnetic media (BPM) includes with respect to each data track a first sub-track and a second sub-track, each sub-track comprised of a plurality of bit-islands. A transducer head placed over a data track generates a readback signal. Channel response circuitry demodulates the readback signal and detects fine positioning... Agent: Kinney & Lange, P.A.

20110032638 - Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic recording/reproducing apparatus using the same: Embodiments of the invention provide a perpendicular magnetic recording medium improved for fly ability, high in read signal quality, and capable of suppressing magnetic decay of recorded magnetization to be caused by stray fields. In one embodiment, a perpendicular recording layer is formed over a substrate with a soft magnetic... Agent: Zilka-kotab, PC- Hit

20110032639 - Electrostatic discharge apparatus for hub and spindle assemblies: An electrostatic discharge apparatus for use with a hub and spindle assembly for a disc drive storage system comprising a spindle; a hub rotatably mounted on the spindle; a capsule formed at least in part from an electrically conductive material that can be placed in electrical communication with the hub... Agent: Seagate Technology LLC C/o Murabito Hao & Barnes LLP

20110032640 - Multi-layer, thin film overcoat for magnetic media disk: A thin film magnetic disk overcoat for perpendicular magnetic recording media comprises three layers. The initial layer comprises a dense mixture of both SiCx and SiNy compounds. The intermediate layer is a relatively dense high energy carbon process and the outer layer is sputtered CNx. The overall thickness of the... Agent: Larson Newman & Abel, LLP

20110032641 - Magnetic head slider: A magnetic head slider comprising: an air inflow end; an air bearing surface; and an air outflow end, the air bearing surface comprising: an inflow side rail face further formed towards the air inflow end than the center of the air bearing surface; an outflow side rail face formed further... Agent: Hitachi C/o Wagner Blecher LLP

20110032642 - Commonly-poled piezoelectric device: A system for poling piezoelectric devices comprises a plurality of thin-film components, a plurality of piezoelectric devices, a poling pad for poling the piezoelectric devices, a plurality of traces, and a plurality of current-limiting elements. The thin-film components are separated by dice lanes to form an array, and the piezoelectric... Agent: Kinney & Lange, P.A.

20110032643 - Exchange coupled composite (ecc) pmr media without protective layer through soft-ferrite: A disk for a hard disk drive. The disk includes a first magnetic layer supported by a substrate and an intermediate layer adjacent to the first magnetic layer. The disk also includes a second magnetic layer that is adjacent to the intermediate layer and includes barium. The barium second magnetic... Agent: Irell & Manella LLP

20110032644 - Method and system for providing magnetic tunneling junction elements having improved performance through capping layer induced perpendicular anisotropy and memories using such magnetic elements: A method and system for providing a magnetic element and a magnetic memory utilizing the magnetic element are described. The magnetic element is used in a magnetic device that includes a contact electrically coupled to the magnetic element. The method and system include providing pinned, nonmagnetic spacer, and free layers.... Agent: Convergent Law Group LLP

20110032645 - Magnetic sensor stack body, method of forming the same, film formation control program, and recording medium: The present invention is directed to align crystal c-axes in magnetic layers near two opposed junction wall faces of a magnetoresistive element so as to be almost perpendicular to the junction wall faces. A magnetic sensor stack body has, on a substrate, a magnetoresistive element whose electric resistance fluctuates when... Agent: Fitzpatrick Cella Harper & Scinto

02/03/2011 > patent applications in patent subcategories.

20110026154 - Method for characterizing a magnetic-recording system for the presence of adjacent-track interference and far-track interference: A method for characterizing a magnetic-recording system for the presence of adjacent-track interference and far-track interference. The method includes writing a plurality of repeating pulse-waveforms on a data track of a magnetic-recording disk at a write element of a magnetic-recording head. The method further includes reading a plurality of read-back... Agent: Hitachi C/o Wagner Blecher LLP

20110026155 - Patterned-media magnetic recording disk with cryptographically scrambled patterns and disk drive operable with the disk: Patterned-media magnetic recording disks are made from a master template that has nondata regions that contain a pattern of one or more discrete nondata islands and discrete gaps, with the pattern representing a scrambled number. All disks made from the master template, or from replica molds made from the master,... Agent: Thomas R. Berthold

20110026156 - Heat-assisted magnetic recording head with laser diode: A heat-assisted magnetic recording head includes a slider, and an edge-emitting laser diode that emits polarized light of TM mode. The laser diode is arranged so that its bottom surface faces the top surface of the slider. An electrode of the laser diode closer to the active layer is bonded... Agent: Oliff & Berridge, PLC

20110026157 - Secure data disposal for disk drive: When a disk sector is written to, a bit for the sector is set indicating that the sector will require secure data disposal (SDD) to be run on it To saw time during end of life disposal, SDD is executed only on sectors whose bits indicate that they have been... Agent: Rogitz & Associates

20110026159 - Disk drive biasing refresh zone counters based on write commands: A disk drive is disclosed comprising a disk comprising a plurality of tracks, and a head actuated over the disk. A plurality of refresh zones are defined, wherein each refresh zone corresponds to a plurality of the tracks. Data is written to a first refresh zone, and a first zone... Agent: Western Digital Corporation Attn: Lesley Ning /IPLaw Department

20110026158 - Methods and devices to control write pole height in recording heads: Recording heads for data storage systems are provided. Recording heads illustratively include a write pole, a bumper, a dielectric layer, and a surface. In some embodiments, a portion of the surface includes portions of the write pole, bumper, and dielectric layer. The write pole, bumper, and dielectric layer are illustratively... Agent: Seagate Technology LLC C/o Westman, Champlin & Kelly, P.A.

20110026160 - Servo pattern writing method, control circuit, and magnetic disk apparatus: According to one embodiment, a servo pattern writing method includes: moving a head from a first one of innermost and outermost circumferences of a medium to the remainder other than the first one while controlling a position of the head in accordance with a temporary pattern preliminarily written on the... Agent: Greer, Burns & Crain

20110026161 - Partially-oxidized cap layer for hard disk drive magnetic media: A perpendicular recording magnetic media with a partially-oxidized cap layer combines a second oxide layer with a first cap layer to form the singular, partially-oxidized cap. The oxidized portion and the non-oxidized portion of the partially-oxidized layer are sputtered from a same target and have a same composition of metallic... Agent: Larson Newman & Abel, LLP

20110026162 - Magnetic disk and method of manufacturing the same: Provided is a magnetic disk that is excellent in durability, particularly in LUL durability and CFT properties, and thus has high reliability despite the low flying height of a magnetic head following the rapid increase in recording density in recent years and despite the very strict environmental resistance following the... Agent: Sughrue Mion, PLLC

20110026163 - Production method of fluid dynamic bearing, fluid dynamic bearing, spindle motor, and disk driving apparatus: According to the preferred embodiment of the present invention, a production method of a fluid dynamic bearing including: a shaft arranged along a center axis; an annular portion expanding radially outwards from the shaft; a sleeve having a top surface opposed to an under surface of the annular portion, for... Agent: Volentine & Whitt PLLC

20110026164 - Air bearing surface of a head slider in a hard disk drive: A head slider for supporting a head over a magnetic disk in a hard disk drive, and a method of making the head slider are disclosed. The air bearing surface (ABS) of the head slider includes a relatively deep recess in front of a trailing pad and an island pad.... Agent: Patterson & Sheridan, L.L.P.

20110026165 - System and apparatus for vibration damping of integrated lead suspensions in high density magnetic storage devices: An integrated lead suspension (ILS) has a constrained layer damper (CLD) that attenuates vibration of the ILS. The CLD may be applied over an already assembled ILS such that the CLD is applied to the cover layer, to the base layer, or to both. Alternatively, the ILS may be encapsulated... Agent: Larson Newman & Abel, LLP

20110026166 - Multi-layer ground plane structures for integrated lead suspensions: Multi-layer ground plane structures and methods of manufacture for integrated lead suspension flexures. A flexure in accordance with one embodiment of the invention includes an insulating layer, a plurality of traces on the insulating layer and a stainless steel base layer on the side of the insulating layer opposite the... Agent: Faegre & Benson LLP Patent Docketing - Intellectual Property

20110026167 - Reducing slider bounce in a hard disk drive: Reducing slider bounce within a hard disk drive. A force is received at a first material while the first material is in contact with a disk of a hard disk drive; the first material comprising a portion that is flexible in a first direction and is substantially non-flexible in a... Agent: Hitachi C/o Wagner Blecher LLP

20110026168 - Current-perpendicular-to-the-plane (cpp) magnetoresistive sensor with cofege ferromagnetic layers and ag or agcu spacer layer: A current-perpendicular-to-the-plane spin-valve (CPP-SV) magnetoresistive sensor has a ferromagnetic alloy comprising Co, Fe and Ge in the sensor's free layer and/or pinned layer and a spacer layer of Ag, Cu or a AgCu alloy between the free and pinned layers. The sensor may be a simple pinned structure, in which... Agent: Thomas R. Berthold

20110026169 - Dual cpp gmr head using a scissor sensor: A dual current-perpendicular-to-plane scissor sensor according to one embodiment includes a middle free layer; two outer free layers positioned on opposite sides of the middle free layer; spacer layers between the middle free layer and each of the outer free layers; and a hard bias layer positioned behind the free... Agent: Zilka-kotab, PC

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