Described are three-transducer piezoelectric motors capable of being operated in an ultrasonic mode over a narrow range of driving frequencies and of being operated in an inchworm mode at driving frequencies outside of, and below, the narrow range. The piezoelectric motors are designed such that all three transducers have the same or nearly the same expansion resonant frequency, thus enabling the motors to be operated in an ultrasonic mode when using a driving frequency at or near the expansion resonant frequency, as well as being operable in a normal inchworm mode at other driving frequencies. The inchworm mode allows for precise and controlled positioning and movement, whereas the ultrasonic mode allows for large movements over short periods.
H02N 2/02 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuatorsLinear positioners
A film layer is disclosed having a graded index of refraction and layer stacks, along with processes and apparatuses for making film layers. The graded index of refraction may have a continuous change through thickness of the film layer. The film layer may be made of a cation oxynitride material. Film layers may be made by using a sputtering source and varying gas flows over time, or by moving or positioning a substrate within PVD zones having lower and higher index of refraction material deposition.
C03C 17/34 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
C03C 17/22 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with other inorganic material
C03C 17/245 - Oxides by deposition from the vapour phase
C03C 17/36 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
A heater for a disc substrate in a deposition system. The heater has a central first heating zone and an annular second heating zone around the first heating zone. Each of the heating zones has an independently controllable power supply to allow, for example, the second heating zone to be heated to a temperature at least 10° C. greater than the first heating zone.
A magnetic stack includes a magnetic recording structure and at least two heat-sink layers where heat-sink layer located furthest from the magnetic recording structure has thermal conductivity equal to or greater than intervening heat-sink layers. One or more interlayers can be included in the magnetic stack. Data storage devices and systems including one or more of the magnetic stacks, and related methods.
A heat-assisted magnetic recording hard disk drive includes a heat-assisted magnetic recording head and a component. The heat-assisted magnetic recording head and the component are disposed in an interior volume of the heat-assisted magnetic recording hard disk drive. The component includes liquid crystal polymer. The component has an outgassing rate that is less than about 300 nanograms per gram.
Disclosed is the implementation of microstructured surfaces on electronic devices to increase the efficiency of two-phase immersion cooling of such electronic devices. The microstructures are adapted to inhibit vapor blanket formation at the device surface during heat transfer to a dielectric cooling fluid by promoting formation and release of vapor bubbles in the dielectric cooling fluid that are roughly an order of magnitude smaller than vapor bubbles formed in the absence of the microstructures.
Methods that facilitate the movement of droplets in a digital microfluidic process, such as a lab-on-a-chip system. The methods also allow for a decrease in the minimum droplet size, allowing for the use of smaller fluid droplets in the microfluidic processes. An oscillation or vibration device, such as a piezo-electric device, is used to produce an oscillation in the lab-on-a-chip that disturbs the fluid droplet, allowing easier and better movement of droplets, which allows use of smaller droplets.
A data storage medium includes a cobalt-based ferromagnetic recording layer, a non-magnetic substrate, and a magnetocaloric material. The magnetocaloric material is disposed between the recording layer and the substrate, wherein the magnetocaloric material is configured to generate heat upon exposure to a magnetic field that causes a phase change in the magnetocaloric material. A method of writing data onto a data storage medium includes applying a magnetic field to the data storage medium at a write location from a write head, wherein the data storage medium includes a cobalt-based ferromagnetic recording layer, a non-magnetic substrate, and a magnetocaloric material disposed between the recording layer and the substrate. The method includes transferring heat from the magnetocaloric material to the recording layer; moving the write location out of the magnetic field, wherein the phase change is reversed; and absorbing heat from the recording layer by the magnetocaloric material.
G11B 5/66 - Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
G11B 5/012 - Recording on, or reproducing or erasing from, magnetic disks
G11B 5/667 - Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers including a soft magnetic layer
9.
Optical magnetic recording system, writer, media, and method
Described are optical magnetic recording systems, writers, media, and methods that utilize pulses of electromagnetic radiation to deterministically record information on magnetic storage media unaided by any additionally applied magnetic field such as from a write pole. The recording pulses may be linearly (or longitudinally) polarized pulses or circularly polarized pulses. The pulses may be modulated in accordance with data bits to be written on the media. Modulation may include modulating the polarization state(s) of the pulses and/or modulating the amplitude(s) the pulses, depending on the particular construction or configuration of the magnetic storage media to be used. Described are recording systems and methods that include laser light pulse generation, light pulse modulation, light pulse delivery, and magnetic media constructions.
G11B 11/105 - Recording on, or reproducing from, the same record carrier wherein for these two operations the methods or means are covered by different main groups of groups or by different subgroups of group Record carriers therefor using recording by magnetisation or demagnetisation using a beam of light or a magnetic field for recording and a beam of light for reproducing, e.g. light-induced thermomagnetic recording or Kerr effect reproducing
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
G11B 5/02 - Recording, reproducing or erasing methodsRead, write or erase circuits therefor
A data storage device includes a data storage disk, an actuator arm, a load beam attached to the actuator arm, and a flexure attached to the load beam. The disk has a read/write surface defining an x-y plane, and the actuator arm is movable parallel to the x-y plane. The load beam supports a slider that carries a head that is configured to interact with the read/write surface. The load beam includes a first dimple that extends toward the read/write surface and has a flat base. The flexure is attached to the load beam at the flat base of the first dimple and is attached to the slider. The flexure is substantially parallel to the x-y plane between the flat base of the dimple and the slider. In another aspect, an actuator arm assembly includes a load beam with weld dimples.
Described are electrodeposition methods, and materials and structures prepared by electrodeposition methods, and devices prepared from the electrodeposited materials.
Provided are devices and methods for reading data from rotating ferroelectric data storage media using a reader that includes a channel region disposed between a source and a drain. The data bits, stored as dipoles in the ferroelectric media, induce a current flowing through the channel region of the reader from the source to the drain when a bias voltage is applied to the media. The bias voltage can be tuned for desired reader operation, such as enhancing the signal or operating within a linear response regime.
G11B 9/02 - Recording or reproducing using a method or means not covered by one of the main groups Record carriers therefor using ferroelectric record carriersRecord carriers therefor
14.
Hard disk drive with dynamically designated media zones for archiving and performance
Described are data storage systems and methods in which data ingested by a hard disk drive (HDD) may be first stored in a designated intake zone of the HDD magnetic media using conventional performance parameters and recording techniques, and thereafter compacted and moved to a designated high-density zone on the magnetic media. The compacted data is stored at higher data storage densities than what is convention, and at lower performance parameters, and thus the moving of compacted data to the high-density zone may be done opportunistically in the background. The intake zone and high-density zone may be statically designated or dynamically defined based on HDD performance requirements, usage characteristics, available media capacity, and so forth.
Described are adsorption filters for filtering hydrocarbon cooling oils. The adsorption filters include a molecular sieve composite mixture that combines at least two filter materials that each have a surface chemistry and/or a pore size distribution that is selected to target the preferential adsorption of contaminants present or expected to be present in the hydrocarbon cooling oils, for example from oxidation of the oils, from electronic components immersed in the oils for cooling, or from other environmental factors. At least one of the filter materials may be an alkali metal aluminosilicate molecular sieve.
Described are systems and methods for vibrational analysis of ultrasonic motors. These include the use of a quadrature oscillator circuit configured to produce a dual signal output that includes two sinusoidal waves separated by a non-zero phase shift of 90 degrees or less. The ultrasonic motor is configured for simultaneous excitation of a bending mode and an expanding mode in response to the dual signal output from the quadrature oscillator. A laser doppler vibrometer is used to analyze the ultrasonic motor being operated under simultaneous bending mode and expanding mode excitation.
An electronic cooling system includes an enclosure in which an electronic component is removably housed. A non-conductive liquid immerses or wets the electronic component. A foam heat sink is attached to a heat emitting surface of the electronic component. The foam heat sink is immersed or wetted by the liquid and provides a heat transfer path between the electronic component and the liquid. A porosity of the foam heat sink increases a coolant heat absorption rate from the heat emitting surface to the fluid.
09 - Scientific and electric apparatus and instruments
Goods & Services
Data storage devices, namely, hard disk drives, solid state drives, digital disk drives, hard drives with solid state memory; Blank digital storage media and hybrid drives; Electronic data storage devices, namely, networked storage drives; Computer hardware for upload, storage, retrieval, download, transmission and delivery of digital content; Computer storage devices, namely, computer memory hardware and hard drives for computers; Computer storage devices, namely, configurable data storage systems comprised of redundant and non-redundant drive arrays; Computer backup and storage systems with multiple removable redundant and non-redundant drive arrays; Redundant and non-redundant drive array based computer backup systems; Removable hard drive based computer backup systems; Computer network-attached storage (NAS) hardware; Computer hardware that provides real-time analytics on data usage patterns and data usage workloads for improving enterprise storage performance and capacity; External storage devices in the nature of external computer disk drives that wirelessly communicate with handheld computers, tablet computers, notebook computers, laptop computers, mobile electronic devices, cell phones, smart phones, MP3 devices; Wireless data storage devices, namely, hard disk drives; Computer software for use in the synchronization, back-up, playing and encryption and decryption of digital files, including audio, video, text, binary, still images, graphics and multimedia files; Computer firmware for data storage, data retrieval, data access, data backup, data replication, data availability, data recovery, data translation and data conversion; Software for organization and management of data in distributed computer storage systems; Software for data encryption; Software for backing up encrypted data files; Software for accessing and restoring data files; Software for downloading computer files over a network; Software for uploading computer files over a network; Software for file management; Software for allowing computer files to be shared by others; Software for creating and maintaining a virtual file server distributed over a network; Software for creating and maintaining a distributed file system; Downloadable computer software for managing, securing and operating network-attached data storage systems; Software for storing, accessing and managing data and multimedia content on computer network; Computer software for synchronizing local computer files, folders, data and information with a cloud storage platform; Data storage computer software for use with and incorporated into computer storage devices; Software for data storage management; Software for processing and storage of data utilizing drive arrays; Computer software for use in imaging, duplicating and restoring the original factory level instances of hard disk drive, for use in preserving and restoring software programs and information in a computer, for use in performing diagnostics on hard disk drives, for use in connection with computer disk drives for the storage, backup and retrieval of information, for use in connection with data storage, data management and interconnection, and management and operation of data storage devices, for use in back-up of computer hard drive data, back-up of computer networks, data recovery; Software for providing streaming video over a network; Computer software designed to encode and decode data; Software for publishing data and allowing access to data; Data search software
19.
SYNTHESIS AND STORAGE OF DNA HAVING ATTACHED NANOSTRUCTURE
Using a nanostructure as a support structure for DNA, particular for binary data-encoding DNA, both during the writing or assembly step and during long-term storage. The nanostructure may be a nanoparticle, such as a magnetic nanoparticle (MNP), e.g., a silica-based MNP. The nanostructure serves as a carrier for DNA storage due to the high-aspect-ratio surface area of the nanostructure, which enables high-density DNA immobilization on the surfaces. When silica nanostructures are used, DNA encapsulated within the silica endures exposure to high temperatures, oxygen radicals, and ultraviolet light without significant damage, thus, supporting long term storage of the DNA. Magnetic nanostructures facilitate, via magnetic separation, buffer exchanges and removal of unligated strands.
A first set of components (e.g., recording head components) is formed on a first wafer at a first pattern density. A second set of components is formed on a second wafer at a second pattern density that is less than half that of the first pattern density. The first and second sets of components are joined to form respective subassemblies (e.g., recording head subassemblies).
Described are systems, devices and methods for staggered bits magnetic recording. A staggered bits track pattern is recorded on granular magnetic recording media, thereby mapping a data bit sequence onto adjacent tracks so that the bits in one track are staggered relative to the bits in the adjacent track. A read head having an effective cross-track width extending across the tracks is aligned to read a sequence of combined bit signals as the read head is advanced in the down-track direction. Each combined bit signal combines one bit from each adjacent track. A data channel coupled to the read head is used to disambiguate the sequence of combined bit signals, thereby reproducing the data bit sequence.
Disclosed are storage devices and methods relating to reading staggered bits recording patterns in which the data bits on adjacent tracks recorded on magnetic media are staggered in such a way that a single reader detects a combined signal from data bits on multiple tracks at selected signal sampling locations. A signal shaping algorithm is used to deconvolve the combine signals, thus isolating each of the tracks from one another so that single track bit sequences can be decoded. In this way, staggered bits patterns can use intertrack interference effects for advantage, allowing readers to read multiple bit tracks simultaneously and without ambiguity.
Described are optical recording media for recording data in voxels, the optical recording media including a plurality of data recording regions for recording the voxels, the data recording regions separated by buffer regions having optical properties such that illumination from a reader that enters one of the data recording regions remains preferentially confined in said one of the data recording regions until being scattered by interaction with one or more of the voxels. Also described are methods for reading the described optical recording media, which include separating the light received from illuminating the voxels based on wavelength, polarization, or other optical properties.
G11B 7/00 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower powerRecord carriers therefor
G11B 7/013 - Arrangement of the information on the record carrier, e.g. form of tracks for discrete information, i.e. where each information unit is stored in a distinct location
G11B 7/24044 - Recording layers for storing optical interference patterns, e.g. hologramsRecording layers for storing data in three dimensions, e.g. volume storage
G11B 7/24067 - Combinations of two or more layers with specific interrelation
24.
Wear leveling and grouping of drives based on position in chassis
A processor may determine, for each subdevice of a set of subdevices of a storage enclosure device, one or more reliability measures of the subdevice. A processor may determine, based at least on the one or more reliability measures for the subdevices and a spatial layout rule, a set of striping groups that maximizes a reliability of the set of subdevices of the storage enclosure device, each of the striping groups including a respective subset of the set of subdevices, wherein the spatial layout rule prescribes a geometric layout of the subdevices within striping groups across the storage enclosure device. A processor may store output data of a data striping operation to a particular subset of subdevices associated with a particular striping group of the set of striping groups.
A recording head includes a near-field transducer proximate a media-facing surface of the recording head. A light delivery waveguide extends from an energy source to the near-field transducer. The light delivery waveguide includes, proximate the near-field transducer, a C-shaped core of a first dielectric material. The C-shaped core has a hollow aligned with the near-field transducer. A cladding of a second dielectric material surrounds the C-shaped core.
A heat-assisted magnetic recording head includes a near-field transducer, a waveguide, and a solid immersion mirror. The near-field transducer is configured to focus and emit an optical near-field. The waveguide is configured to receive electromagnetic radiation and propagate the electromagnetic radiation toward and proximal to the near-field transducer. The solid immersion mirror is disposed proximal to the near-field transducer and along a media-facing surface of the heat-assisted magnetic recording head. The solid immersion mirror includes a first segment and a second segment disposed on opposite sides of the near-field transducer relative to a cross-track dimension of the heat-assisted magnetic recording head. The solid immersion mirror includes a thermally robust metal having a melting temperature of at least 1500 degrees Celsius. The thermally robust metal is a primary material of the solid immersion mirror.
Described are magnetic recording heads that include auxiliary current wires that drive the write pole tip, augmenting the main coils that provide magnetomotive force to the write pole. The auxiliary wires are provided in close proximity to the write pole tip near the media-facing surface of the recording head, and are preferably in closer proximity to the write pole tip than are the main coils. In certain writer designs that include one or more heat sink structures positioned near or around the write pole tip, such as may be found in heat-assisted magnetic recording writer constructions, the auxiliary wire(s) may be accommodated near or around the heat sink structures, or the heat sink structures themselves can serve as the auxiliary wires.
Fasteners such as stainless-steel screws used to physically couple at least one component within a housing of a data storage device such as a hard disk drive to secure the at least one component within the housing. The fasteners are made by first pre-treating the fasteners to form sufficient metal oxide prior to coating the fasteners in one or more lubricants.
Provided are arrangements of optical elements that combine the features of a high power, compact laser that exhibits narrow linewidth output and that does not appreciably shift in wavelength or vary in power over a wide range of temperatures. Such arrangements include a transmission filter and a Bragg reflector that select out the wavelength for which the output power of a reflective semiconductor optical amplifier (RSOA) is least affected by changes in temperature over a temperature range of interest. Such arrangements may also utilize temperature-insensitive materials.
G11B 7/126 - Circuits, methods or arrangements for laser control or stabilisation
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
G11B 13/08 - Recording simultaneously or selectively by methods or means covered by different main groupsRecord carriers thereforReproducing simultaneously or selectively therefrom using near-field interactions or transducing means and at least one other method or means for recording or reproducing
H01S 5/026 - Monolithically integrated components, e.g. waveguides, monitoring photo-detectors or drivers
Provided are systems, methods and configurations for high-bandwidth co-packaged optical assemblies designed to allow optical modules to be plugged directly into the optical package via slots in the front fascia panel, thus providing for field-replaceability and serviceability of the optical modules while ensuring close electronic connectivity.
A hard disk drive (HDD) includes a heat-assisted magnetic recording (HAMR) head. The HAMR head includes one or more features comprising a laser device that is a heterogeneous integrated epitaxial grown GaAS laser. The laser device couples directly with a waveguide that transfers the electromagnetic radiation generated by the laser device to a near field transducer. The device includes an N-doped layer for coupling the output of the GaAs active layer to the waveguide.
G02B 6/10 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
G11B 5/31 - Structure or manufacture of heads, e.g. inductive using thin film
32.
High-density archival storage using conventional hard disk drive architecture
Described are hard disk drives (HDDs) operable for archival applications and utilizing the same mechanical and electrical design of conventional HDDs. The capacity of a conventional HDD may be extended by up to 25% to 40% or more by employing multiple write and/or read spins before declaring success in write and read processes. The multiple write and/or read spins are designed to address the lower reliability that would otherwise result from high density packing of the data, at the cost of reducing performance. The result is an HDD with lower performance at higher capacity without sacrificing reliability and without altering conventional HDD mechanical or electrical design.
Read and write transducer elements have very high reliability for most of their respective lives. Only a small percentage of transducer elements fail after a significant duration of operation in the field, but failure rate ramps up significantly with as the transducer elements age, particularly with heavy read and write use. Prior solutions to this problem involve regularly running data field integrity checks. However, the data field integrity checks are resource intensive and yield significant latency impacts. The presently disclosed technology renders data field integrity checks (that come with high latency costs) dependent upon periodic or continuous head health monitoring schemes (that come with low latency costs). The data field integrity checks are triggered by a “poor health” signal generating from the head health monitoring schemes rather than being continuously or periodically performed with no regard to projected head health.
G11B 5/55 - Track change, selection, or acquisition by displacement of the head
G06F 3/06 - Digital input from, or digital output to, record carriers
G11B 25/04 - Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing using flat record carriers, e.g. disc, card
G11B 27/36 - Monitoring, i.e. supervising the progress of recording or reproducing
Disclosed are methods and assemblies used to optically communicate signals within a hard disk drive between controller electronics and recording heads. One or more transceivers in a fixed location can be used to communicate with one or more transceivers positioned on a moveable actuator and coupled to the recording heads. The use of linear motion actuators can help preserve line-of-sight optical communication between the transceivers.
A method comprises forming a single-crystal-like metal layer on a metal seed layer, the metal seed layer formed on a carrier wafer. The method comprises forming a first diffusion layer on the single-crystal-like metal layer. The method also comprises forming a second diffusion layer on a dielectric layer of a target substrate, the target substrate comprising one or more recording head subassemblies. The method further comprises flipping and joining the carrier wafer with the target substrate such that the first and second diffusion layers are bonded and the single-crystal-like metal layer is integrated with the recording head as a near-field transducer.
G11B 5/127 - Structure or manufacture of heads, e.g. inductive
G11B 5/60 - Fluid-dynamic spacing of heads from record carriers
G11B 5/84 - Processes or apparatus specially adapted for manufacturing record carriers
G11B 7/124 - Integrated head arrangements, e.g. with source and detectors mounted on the same substrate the integrated head arrangements including waveguides
Polynomial function secret sharing provides for computation of reconstruction share results for a polynomial function on an input. An allocatable share of the polynomial function is received at a computing system of the share result computation systems. The allocatable share is generated from the polynomial function. Each of the allocatable shares is distributed to a unique share result computation system of the share result computation systems. Each allocatable share includes a share element for each coefficient in the polynomial function, wherein the share elements for a coefficient across the share result computation systems summing to the coefficient. A reconstruction share result is generated at the computing system by computing a dot product of the input and the allocatable share received by the computing system. A combination of the reconstruction share results generated by the share result computation systems yields a reconstructed result of the polynomial function on the input.
Described are systems, devices and methods for regulating speculative reading in a hard disk drive that has a read reliability budget. Regulating speculative reading under a read reliability budget involves selecting an amount of read look ahead (RLA) in response to determining whether or not a read rate exceeds the read reliability budget. When the read rate is lower than the read reliability budget, a full RLA amount can be used, thus ensuring high performance. When the read rate exceeds the read reliability budget, the RLA amount can be adjusted down while maintaining performance at acceptable levels. Adjustments to RLA may be made at periodic intervals, and in response to whether the workload is more sequential or more random.
Disclosed are sealed enclosure HAMR hard drives, and methods for use therewith, that reduce the rate of depletion of gaseous Oxygen within the sealed HAMR drive enclosure, thereby leaving an amount of Oxygen available for mitigation of the effects of carbonaceous residue formation, thus extending the useful life of the HAMR drive. In sealed enclosure HAMR hard drives that include a component having a NdFeB alloy magnet, the sealed enclosure is filled with a gas mixture that includes primarily Helium along with a sufficient amount of Oxygen to mitigate carbonaceous residue formation during the lifetime of the drive and a sufficient amount of Nitrogen to reduce the rate of Oxygen depletion due to oxidation of the NdFeB magnet.
A method for calibrating a hard drive having a heat-assisted magnetic recording head is provided. The method includes performing, across an increasing temperature ramp, a first set of write/read operations using the head, performing, across a decreasing temperature ramp, a second set of write/read operations using the head, generating performance data associated with the head based on the first set of write/read operations and the second set of write/read operations, calculating a comparison value based on the performance data associated with the head and performance data associated with a plurality of heads, and adjusting an operating parameter value of the head based on the comparison value exceeding a threshold, the adjusted operating parameter reducing a likelihood that a laser of the head will exhibit write instability.
G11B 11/10 - Recording on, or reproducing from, the same record carrier wherein for these two operations the methods or means are covered by different main groups of groups or by different subgroups of group Record carriers therefor using recording by magnetisation or demagnetisation
G11B 5/02 - Recording, reproducing or erasing methodsRead, write or erase circuits therefor
G11B 27/36 - Monitoring, i.e. supervising the progress of recording or reproducing
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
A method of rotating a set of keys, having a media encryption key (MEK) and a current media encryption key encryption key (MEKEK) encrypted and stored in a self-encrypting drive (SED) having data encrypted with the MEK (MEK (data)), includes decrypting the stored MEK and the current MEKEK. A new MEK (MEK′) and a new MEKEK (MEKEK′) are generated. The MEKEK′ is encrypted to replace the current encrypted MEKEK. A concatenation of the MEK and the MEK′ is encrypted with MEKEK′. The encrypted data MEK (data) is re-encrypted with MEK′.
A data storage system can utilize one or more data storage devices that employ a solid-state non-volatile read destructive memory consisting of ferroelectric memory cells. A leveling strategy can be generated by a wear module connected to the memory with the leveling strategy prescribing a plurality of memory cell operating parameters associated with different amounts of cell wear. The wear module may monitor activity of a memory cell and detect an amount of wear in the memory cell as a result of the monitored activity, which can prompt changing a default set of operating parameters for the memory cell to a first stage of operating parameters, as prescribed by the leveling strategy, in response to the detected amount of wear.
A computing system cryptographically generates an intermediate message authentication code as a function of the message and a cryptographic key assigned to a first party. The computing system also generates a first instance of an aggregate message authentication code corresponding to the message by combining the intermediate message authentication code with one or more other intermediate message authentication codes of one or more second parties. Each code of the one or more other intermediate message authentication codes is cryptographically generated as a function of the message and individual cryptographic key assigned to each of the one or more second parties.
A computing system determines a maximum field size for a field containing values of quantized versions of a weight matrix, an input data matrix, and a bias matrix and determines a weight upper bound of scaling factors for the weight matrix based on values of the weight matrix, an input data upper bound of scaling factors for the input data matrix based on values of the input data matrix, and a bias upper bound of scaling factors for the bias matrix based on values of the bias matrix. The computing system also sets a weight scaling factor of the weight matrix, an input data scaling factor of the input data matrix, and a bias scaling factor for the bias matrix in two different cases: when the sum is less than or equal to the bias upper bound and when the sum is greater than the bias upper bound.
A data storage system for use in a high radiation environment has a radiation-hardened storage controller that measures a current draw of a storage drive in a storage array. The storage drive is not radiation-hardened. Based on a characteristic of the current draw, a latch up is detected the storage drive. Based on the detected latch up, power is removed from all or part of the storage drive. After a cooling period has elapsed, the power is reapplied to the storage drive.
A method of planarizing a device having a surface topography with at least one material at a surface of the device is described. The method comprises the steps of depositing a stop layer over at least a portion of the at least one material which substantially retains the surface topography of the device. A sacrificial layer is deposited over at least a portion of the stop layer. A planarization process is performed on the device. The planarization process includes the steps of performing a chemical mechanical polish (CMP) on the top surface of the sacrificial layer. A physical removal step is conducted on the remainder portion of the sacrificial layer to form a planarized surface. A second CMP step and a second physical removal step are conducted, to form a planarized device.
A heat-assisted magnetic recording head includes a near-field transducer, a waveguide, and a resonance enhancing feature. The near-field transducer is configured to focus and emit an optical near-field. The waveguide is configured to receive electromagnetic radiation and propagate the electromagnetic radiation toward and proximal to the near-field transducer. The resonance enhancing feature is disposed proximal to the near-field transducer and to a media-facing surface of the heat-assisted magnetic recording head. The resonance enhancing feature includes a first segment and a second segment disposed on opposite sides of the near-field transducer relative to a cross-track dimension of the heat-assisted magnetic recording head. Each of the first segment and the second segment of the resonance enhancing feature includes a liner and a filler. The liner of each of the first segment and the second segment at least partially faces the near-field transducer. The filler of each of the first segment and the second segment is disposed distal to the near-field transducer relative to the liner of the respective segment.
A method includes partially forming a top chamfer on a disc substrate with a first brush, and partially forming a bottom chamfer on the disc substrate with a second brush. The method also includes completing the formation of the bottom chamfer with the first brush, and completing the formation of the top chamfer with the second brush.
G11B 5/84 - Processes or apparatus specially adapted for manufacturing record carriers
B24B 9/06 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
B24B 9/10 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass
A method for mitigating the effects of malware is provided. The method includes determining a compressibility of a portion of data, determining a data corruption condition is satisfied based on the determined compressibility, and modifying a retention policy for retention of stored snapshots associated with the portion of data based on the satisfaction of the data corruption condition. The modifying of the retention policy includes generating a first snapshot associated with the portion of the data, prior to writing cached data associated with the portion of the data, writing the cached data associated with the portion of the data, and generating a second snapshot associated with the portion of the data, responsive to the deletion.
A method for serial and contemporaneous synthesis of disparate deoxy-ribonucleic acid (DNA) strands in an array of wells defined within a substrate. Each well in the array of wells contains a precursor nucleotide chain. A first subset of wells of the array of wells is designated not to receive a nucleotide of a specified nucleobase type and the first subset of wells is closed. A solution of a binding reaction enzyme and nucleotides of the specified nucleobase type bound with a corresponding chemical blocker is flowed over the array of wells. Nucleotides of the specified nucleobase type are received in each of a second subset of wells of the array of wells that are open and designated to receive the nucleotide of the specified nucleobase type. Received nucleotides of the specified nucleobase type are bound with assistance of the binding reaction enzyme to corresponding precursor nucleotide chains in the second subset of wells.
The system disclosed herein includes one or more storage drives, an FPGA based controller board, and a flash memory configured to store one or more FPGA executable binary libraries. The FPGA based controller board may include a drive logic detector configured to detect the type of the one or more of the storage drives and an FPGA executable libraries configuration module configured to select one or more of the FPGA executable binary libraries from the flash memory based on the type of the one or more of the storage drives to implement an FPGA based interface for communication between the one or more storage drives and a host.
A system on chip (SOC) integrated circuit device having an incorporated ferroelectric memory configured to be selectively refreshed, or not, depending on different operational modes. The ferroelectric memory is formed of an array of ferroelectric memory elements (FMEs) characterized as non-volatile, read-destructive semiconductor memory cells each having at least one ferroelectric layer. A read/write circuit writes data to the FMEs and subsequently reads back data from the FMEs responsive to respective write and read signals supplied by a processor circuit of the SOC. A refresh circuit is selectively enabled in a first normal mode to refresh the FMEs after a read operation, and is selectively disabled in a second exception mode so that the FMEs are not refreshed after a read operation.
G11C 11/22 - Digital stores characterised by the use of particular electric or magnetic storage elementsStorage elements therefor using electric elements using ferroelectric elements
G11C 7/10 - Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
G11C 17/12 - Read-only memories programmable only onceSemi-permanent stores, e.g. manually-replaceable information cards using semiconductor devices, e.g. bipolar elements in which contents are determined during manufacturing by a predetermined arrangement of coupling elements, e.g. mask-programmable ROM using field-effect devices
53.
Method for forming a HAMR recording head with a protruding near-field transducer
A method involves forming a recording head that comprises a waveguide, a write pole, and a near-field transducer proximate the write pole. The near-field transducer has an extended portion extending towards a surface of the recording head and operable to direct plasmons to a recording medium. The surface of the recording head is lapped to form a lapped surface. A resist or hardmask is patterned on the lapped surface in a region that encompasses the extended portion. The lapped surface is etched with the resist or hardmask pattern to form a media-facing surface such that the extended portion protrudes beyond the media-facing surface by a first distance, and the resist or hardmask is removed.
An electronic device including a housing having an interior gas space, at least one electronic component positioned within the housing, an environmental control module positioned within the housing, wherein the environmental control module contains a sorbent, and a relative humidity sensor in communication with the interior gas space, wherein the interior gas space is maintainable at a relative humidity of 0% as measured by the relative humidity sensor. The interior gas space may include between about 97% and about 99.9% helium expressed as a molar fraction and at least a portion of the remainder as molecular oxygen. The sorbent can include at least one of a type A zeolite, a type X zeolite, or a type Y zeolite.
An apparatus includes a data storage disc having a read/write surface, and an arm extending along an arm axis and having a head end that supports a head that is configured to interact with the read/write surface. The apparatus also includes a rail extending along a rail axis that is normal to the arm axis, and a carriage coupled to the arm and movably coupled to the rail. The apparatus further includes a latch mechanism configured to releasably hold the carriage to the rail at a fixed position.
Evolving function secret sharing is performed on a given function by multiple share parties, A dealer selects a random vector for each share party corresponding to an arrival order. The dealer generates an array of function shares for each share party of the set, each array including a function share based on the random vector corresponding to the share party and one or more function shares cryptographically generated based on the random vector corresponding to each previously-arrived share party. The dealer distributes an array of the function shares to each share party, wherein a first function share result resulting from a computation of a first function share on given input data and at least a second function share result resulting from a computation of a second function share on the given input data are combinable to yield a result of the given function executed on the given input data.
An apparatus includes a substrate. A laser is deposited above the substrate. The laser includes one or more non-self-supporting layers of crystalline material. The laser has a length along a light path in a range of about 40 um to about 350 um. An optical input coupler is configured to receive light from the laser. A waveguide is deposited proximate the optical input coupler. The waveguide is configured to communicate light from the laser via the optical input coupler to a near-field transducer that directs energy resulting from plasmonic excitation to a recording medium.
An apparatus includes a linear actuator assembly with a rail, a carriage, and a piezoelectric actuator. The carriage is coupled to the rail such that the carriage is movable with respect to the rail, and the piezoelectric actuator is configured and arranged to cause the carriage to move linearly between ends of the rail.
A device includes a first set of switches and a second set of switches; a first filter and a second filter each comprising an unfiltered terminal and a filtered terminal; and a first piezoelectric element and a second piezoelectric element each comprising a first contact and a second contact. Turning on the first set of switches and turning off the second set of switches applies a first driving voltage to the first piezoelectric element and applies a second driving voltage to the second piezoelectric element.
The present disclosure relates to methods of forming adhesive films having at least one pressure-sensitive adhesive polymer, related films, and related methods of using such films in lapping processes.
C09J 7/40 - Adhesives in the form of films or foils characterised by release liners
C09J 133/08 - Homopolymers or copolymers of acrylic acid esters
H01L 21/02 - Manufacture or treatment of semiconductor devices or of parts thereof
H01L 21/673 - Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereofApparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components using specially adapted carriers
B05D 5/10 - Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an adhesive surface
A method includes partially forming a top chamfer on a disc substrate with a first brush, and partially forming a bottom chamfer on the disc substrate with a second brush. The method also includes completing the formation of the bottom chamfer with the first brush, and completing the formation of the top chamfer with the second brush.
G11B 5/84 - Processes or apparatus specially adapted for manufacturing record carriers
B24B 9/06 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
B24B 9/10 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass
62.
MIGRATION OF DATA IN RESPONSE TO WRITE-FAILURE OF DISK DRIVE HEAD
A failure of a head is detected, the head reading from and writing to an affected surface of a disk of a disk drive. The failure prevents the head from writing to the affected surface but does not prevent the head from reading from the affected surface. In response to detecting the failure, a remediation is performed. The remediation involves determining spare capacity blocks on other surfaces of the disk drive different than the affected surface, and copying data from the affected surface to the spare capacity blocks via an internal copy function within the disk drive. The spare capacity blocks in place of the affected surface for data storage and retrieval subsequent to the failure.
A heat-assisted magnetic recording (HAMR) device is configured to write regions of neutral polarity on a magnetic media during a same pass of the recording head in which other regions are written of positive polarity and negative polarity. The various disclosed write techniques may facilitate creation of “zero state” (substantially net zero polarity) transition zones between each pair of data bits of opposite polarity and/or may facilitate the encoding of three different logical states (e.g., 1, 0, and −1) on the media.
The technology disclosed herein provides batchwise metric-based malware detection by receiving a plurality of input/output (IO) requests, generating IO trace sequences by combining a number of IO requests, generating batchwise metrics, each of the batchwise metrics corresponding to one of the IO trace sequences and generated based on an operation performed on values of parameters within IO trace sequences, generating inferential model input feature vectors based on the generated batchwise metrics, and training an inferential model based on a plurality of the generated inferential model input feature vectors and ground truth values corresponding to the IO trace sequences, each of the ground truth values indicating whether a corresponding one of the IO trace sequences represents a ransomware attack.
09 - Scientific and electric apparatus and instruments
Goods & Services
(1) Computer storage devices, namely, hard drives for computers; data storage devices, namely, hard disk drives, blank digital storage media; digital disk drives; removable hard drive based computer backup systems; docking stations for data storage devices; interfaces for computers; computer hardware for upload, storage, retrieval, download, transmission and delivery of digital content; computer software for use in the synchronization, back-up, playing and encryption and decryption of digital files, including audio, video, text, binary, still images, graphics and multimedia files; computer firmware for data storage, data retrieval, data access, data backup, data replication, data availability, data recovery, data translation and data conversion; computer software for use in imaging, duplicating and restoring the original factory level instances of hard disk drive, for use in preserving and restoring software programs and information in a computer, for use in performing diagnostics on hard disk drives, for use in connection with computer disk drives for the storage, backup and retrieval of information, for use in connection with data storage, data management and interconnection, and management and operation of data storage devices, for use in back-up of computer hard drive data, back-up of computer networks, and data recovery.
67.
INTEGRATED OPTICAL REAL-TIME MOLECULE SEQUENCING VIA PHOTONIC CRYSTAL LASERS/DETECTORS
A laser-based molecular sequencing system includes a two-dimensional photonic crystal surface emitting laser (PCSEL) array including a plurality of PCSEL devices located in a first layer, each PCSEL device oriented in a direction perpendicular to the first layer. The system also includes a controller configured to modulate a bias on at least one PCSEL device of the plurality of PCSEL devices, the modulation configured to selectively operate each PCSEL device as an emitter or detector at a point in time based on the bias.
A method of forming a thin film structure involves performing one or more repetitions to form a template on a wafer. The repetitions include: depositing a layer of a template material to a thickness; and ion beam milling the layer of the template material to remove thickness less than the first thickness. The ion beam milling may be performed at a two different angles during two different repetitions. At least one of the angles is a channeling angle defined relative to a crystalline microstructure of the template material. After the repetitions, additional material may be deposited on the template to form a final structure. The additional material has a same crystalline microstructure as the template material.
G11B 5/31 - Structure or manufacture of heads, e.g. inductive using thin film
B81C 1/00 - Manufacture or treatment of devices or systems in or on a substrate
B82B 1/00 - Nanostructures formed by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units
B82Y 10/00 - Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
G11B 11/24 - Recording on, or reproducing from, the same record carrier wherein for these two operations the methods or means are covered by different main groups of groups or by different subgroups of group Record carriers therefor using recording by near-field interactions
H01F 10/30 - Thin magnetic films, e.g. of one-domain structure characterised by the substrate or intermediate layers characterised by the composition of intermediate layers
H01L 21/3213 - Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
H01L 21/67 - Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereofApparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components
69.
HEAT ASSISTED MAGNETIC RECORDING WRITER HAVING A NOTCHED WRITE POLE
Described is a recording head that includes a notched write pole to enhance perpendicularity of the write pole field. The write pole notch is formed at the media-facing surface and the leading edge of the write pole. The write pole notch is filled with a non-magnetic metal. The recording head further includes a near field transducer located in front of the leading edge of the write pole and having a portion extending to the media-facing surface that is spaced apart from the notch, thereby forming a gap between the near field transducer and the notch.
G11B 5/187 - Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to, the recording mediumPole piecesGap features
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
A data media may generally be configured in accordance with various embodiments with contactingly adjacent first and second heatsink layers that are tuned with a common crystallographic orientation and with different thermal conductivities to provide a predetermined thermal gradient. The data media may further be configured with a recording layer formed with the common crystallographic orientation adjacent the first and second heatsink layers.
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
G11B 5/66 - Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
An apparatus is configured to include a first magnetic layer, a second magnetic layer and a break layer between the first magnetic layer and the second magnetic layer. The first magnetic layer includes a Curie temperature gradient between a first surface and a second surface of the first magnetic layer. The second magnetic layer includes a Curie temperature gradient between a third surface and a fourth surface of the second magnetic layer. The first magnetic layer has an average Curie temperature that is higher than the second magnetic layer.
G11B 5/31 - Structure or manufacture of heads, e.g. inductive using thin film
G11B 5/66 - Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
72.
HEAT-TRANSFER LIQUID SOLUTION, AND RELATED METHODS OF MAKING AND USING
The present disclosure includes methods of making a heat-transfer liquid solution by combining a heat-transfer liquid with a solute component to form a heat-transfer liquid solution, and related heat-transfer liquid solutions and methods of using.
A private set intersection protocol in which a third party may determine intersections of a first set of a first party and a second set of a second party. The third party may not obtain any information regarding the first set or the second set other than the intersection result. The protocol may be communicatively efficient and computationally efficient to allow for secure private set intersection to be performed.
A laser-based computing system includes a two-dimensional photonic crystal surface emitting laser (PCSEL) array including a plurality of PCSEL emitters located in a first layer, each emitter oriented in a direction perpendicular to a plane formed by the first layer, where the plurality of PCSEL emitters form a preset pattern within the first layer, and a controller operatively connected to the plurality of PCSEL emitters, the controller configured to modulate phase and/or amplitude of a beam emitted by a PCSEL emitter of the plurality of PCSEL emitters.
A magnetic recording head includes an active component and a piezoelectric actuator. The active component is disposed proximal to a media-facing surface of the magnetic recording head. The piezoelectric actuator includes a piezoelectric layer, a first electrode coupled to the piezoelectric layer, and a second electrode coupled to the piezoelectric layer. The piezoelectric actuator is configured to exert a mechanical force to displace the active component such that the displacement changes a protrusion of the active component from the media-facing surface.
A storage command is received that is directed to a distributed storage system. Based on the storage command, a metadata update is targeted to a logical block address of metadata storage of the distributed storage system. The metadata update includes a chunk of metadata that is smaller than a block addressed by the logical block address. An atomic write command is sent to a block device interface. The command includes the chunk of metadata, the logical block address, and an offset within the block defining where the chunk of metadata is to be stored. Via the block device interface, the atomic write command is stored in a non-volatile buffer that has faster performance than the metadata storage. The chunk of metadata of the atomic write command is written from the non-volatile buffer to the block in the metadata storage via a background process using an atomic read-modify-write command.
G11B 11/105 - Recording on, or reproducing from, the same record carrier wherein for these two operations the methods or means are covered by different main groups of groups or by different subgroups of group Record carriers therefor using recording by magnetisation or demagnetisation using a beam of light or a magnetic field for recording and a beam of light for reproducing, e.g. light-induced thermomagnetic recording or Kerr effect reproducing
G11B 5/39 - Structure or manufacture of flux-sensitive heads using magneto-resistive devices
G11B 5/48 - Disposition or mounting of heads relative to record carriers
G11B 5/60 - Fluid-dynamic spacing of heads from record carriers
Methods of writing data to a DNA strand by inserting data-encoding oligos or symbols into a DNA backbone. One particular method of synthesizing a DNA strand encoding data includes cleaving a DNA backbone into multiple segments, and pasting a plurality of data-encoding oligo symbols between the multiple segments, with the terminal ends of the segments joining homologous terminal ends of the symbols, resulting in the DNA strand encoding data comprising alternating segments and symbols.
G11C 13/02 - Digital stores characterised by the use of storage elements not covered by groups , , or using elements whose operation depends upon chemical change
C12P 19/34 - Polynucleotides, e.g. nucleic acids, oligoribonucleotides
80.
HARD DISK DRIVE HAVING A MOTOR ASSEMBLY WITH A ROTATIONAL BALANCING SPRING PIN
A hard disk drive includes at least one magnetic disk and a motor assembly. The motor assembly is configured to rotatably support the magnetic disk(s) and circumferentially rotate the magnetic disk(s) about an axis of rotation during operations of the hard disk drive. The motor assembly includes at least one rotational balancing spring pin. Each rotational balancing spring pin is configured to reduce a rotating unbalance of the motor assembly.
A data storage device includes a data storage disk, an arm, a first head, an elevator, and a sleeve. The data storage disk has a first read/write surface defining an x-y plane. The arm is attached to a pivot block, wherein the arm is movable relative to the disk. The first head is supported by the arm, wherein the first head is configured to interact with the first read/write surface. The elevator is configured to move the arm in a z direction, wherein the elevator comprises a stepper motor, a gear train, and a lead screw. The sleeve partially encases the lead screw. In another aspect, a data storage device includes a data storage disk, an arm, a first head, an elevator, and a housing encasing the gear train and attached to the pivot block.
A secret sharing scheme with yes and no shares and having a hidden access structure. The secret sharing scheme may include share generation in which yes shares and no shares are generated for, and distributed to, each party in the secret sharing scheme. In turn, upon an attempt to reconstruct the secret, participants in the reconstruction each provide a share, which is unknown to be a yes share or a no share to the other participants. The secret is only reconstructable if the shares used in the reconstruction include yes shares of a minimal authorized subset of the parties. However, prior to secret reconstruction, the access structure remains hidden and the participants in a reconstruction are unaware of the character of the shares provided by other participants in the reconstruction attempt.
H04L 9/06 - Arrangements for secret or secure communicationsNetwork security protocols the encryption apparatus using shift registers or memories for blockwise coding, e.g. D.E.S. systems
The technology disclosed herein provides a memory blade including a plurality of fabric switches configured to receive commands from a plurality of host clients, an address decoder and tracker circuit communicatively connected to the fabric switches and configured to determine the source of commands received at the fabric switches an aggregator crossbar configured to provide bandwidth aggregation between host clients and a plurality of memory modules; and a buffer module configured to couple the commands from the plurality of host clients with the plurality of memory modules.
G06F 11/10 - Adding special bits or symbols to the coded information, e.g. parity check, casting out nines or elevens
G06F 3/06 - Digital input from, or digital output to, record carriers
H04L 67/2876 - Pairs of inter-processing entities at each side of the network, e.g. split proxies
H04L 67/289 - Intermediate processing functionally located close to the data consumer application, e.g. in same machine, in same home or in same sub-network
84.
Method of for bonding noble metal structure with a dielectric layer using an adhesive layer
A first layer that includes a metal seed layer, a refractive seed or a refractive dopant is formed on a dielectric substrate. A peg of a near-field transducer is formed on the first layer such that a first surface of the peg is formed on and is in contact with the metal seed. An adhesive layer is formed over the peg using atomic layer deposition. The adhesive layer includes alumina and is 4 nm or less in thickness. A silicon dioxide overcoat is deposited over the adhesive layer. The alumina bonds the silicon dioxide to the peg.
G11B 5/40 - Protective measures on heads, e.g. against excessive temperature
C23C 14/02 - Pretreatment of the material to be coated
G11B 5/255 - Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to, the recording mediumPole piecesGap features comprising means for protection against wear
G11B 5/31 - Structure or manufacture of heads, e.g. inductive using thin film
A method of forming patterned magnetic media disclosed herein includes patterning a guiding layer on a substrate to form a nucleation guiding pattern. A layer of magnetic material is formed over the nucleation guiding pattern. The magnetic material may comprise a non-magnetic segregant. Magnetic grains are grown in a down-track direction and in a cross-track direction responsive to the nucleation guiding pattern and the non-magnetic segregant forms grain boundaries between the magnetic grains.
G11B 5/66 - Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
A data storage system for use in a high radiation environment runs first and second operating time counters to monitor a field-programmable, gate array (FPGA) configured as a storage controller. Based on the first operating time counter passing a first threshold, the FPGA is fully reprogrammed. Based on the second operating time counter passing a second threshold less than the first threshold, the FPGA is partially reprogrammed.
A method involves forming a metal layer on a metal seed layer, the metal seed layer formed on a carrier wafer. A surface of the metal layer defines a first metal bonding layer. A second metal bonding layer is provided on a target substrate having recording head subassemblies. Mating surfaces of the first and second metal bonding layers are activated and the carrier wafer is flipped and joined with the target substrate such that the first and second metal bonding layers are bonded and the metal layer is integrated with the recording head as a near-field transducer.
G11B 5/127 - Structure or manufacture of heads, e.g. inductive
G11B 5/84 - Processes or apparatus specially adapted for manufacturing record carriers
G11B 7/124 - Integrated head arrangements, e.g. with source and detectors mounted on the same substrate the integrated head arrangements including waveguides
H01L 33/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
G11B 5/60 - Fluid-dynamic spacing of heads from record carriers
09 - Scientific and electric apparatus and instruments
Goods & Services
Computer storage devices, namely, hard drives for computers;
data storage devices, namely, hard disk drives, blank
digital storage media; digital disk drives; removable hard
drive based computer backup systems; docking stations for
data storage devices; interfaces for computers; computer
hardware for upload, storage, retrieval, download,
transmission and delivery of digital content; computer
software for use in the synchronization, back-up, playing
and encryption and decryption of digital files, including
audio, video, text, binary, still images, graphics and
multimedia files; computer firmware for data storage, data
retrieval, data access, data backup, data replication, data
availability, data recovery, data translation and data
conversion; computer software for use in imaging,
duplicating and restoring the original factory level
instances of hard disk drive, for use in preserving and
restoring software programs and information in a computer,
for use in performing diagnostics on hard disk drives, for
use in connection with computer disk drives for the storage,
backup and retrieval of information, for use in connection
with data storage, data management and interconnection, and
management and operation of data storage devices, for use in
back-up of computer hard drive data, back-up of computer
networks, and data recovery.
Reading data stored on an optical fiber medium includes receiving an optical fiber having data stored thereon in a light-affecting format, guiding the optical fiber through a readback guide system causing a length of the optical fiber to align with an axis, directing light through at least a portion of the optical fiber, the light producing an observable light dispersion pattern based on the light-affecting data stored on the optical fiber, observing the light dispersion pattern as a manner of reading the stored data of the optical fiber, determining the stored data based on the observing the light dispersion pattern, and outputting the determined stored data to a host.
A method of interconnecting multiple components of an electrical assembly with a solder joint that includes the steps of positioning a suspension adjacent to a slider to provide a connection area between the suspension and the slider, wherein the suspension comprises a pre-deposited quantity of solder material with a height that provides for a predefined gap between a lower surface of the slider and an upper surface of the solder material, and applying energy to the solder material to melt the solder material and allow it to move toward and contact the lower surface of the slider.
09 - Scientific and electric apparatus and instruments
Goods & Services
Computer storage devices, namely, hard drives for computers;
data storage devices, namely, hard disk drives, blank
digital storage media; digital disk drives; removable hard
drive based computer backup systems; docking stations for
data storage devices; interfaces for computers; computer
hardware for upload, storage, retrieval, download,
transmission and delivery of digital content; computer
software for use in the synchronization, back-up, playing
and encryption and decryption of digital files, including
audio, video, text, binary, still images, graphics and
multimedia files; computer firmware for data storage, data
retrieval, data access, data backup, data replication, data
availability, data recovery, data translation and data
conversion; computer software for use in imaging,
duplicating and restoring the original factory level
instances of hard disk drive, for use in preserving and
restoring software programs and information in a computer,
for use in performing diagnostics on hard disk drives, for
use in connection with computer disk drives for the storage,
backup and retrieval of information, for use in connection
with data storage, data management and interconnection, and
management and operation of data storage devices, for use in
back-up of computer hard drive data, back-up of computer
networks, and data recovery.
Systems and methods are disclosed for magnetoresistive asymmetry (MRA) compensation using a digital compensation scheme. In certain embodiments, a method may comprise receiving an analog signal at a continuous-time front end circuit, and performing analog offset compensation to constrain the extrema of the analog signal to adjust a dynamic range based on an input range of an analog-to-digital converter (ADC), rather than to modify the analog signal to have a zero mean. The method may further comprise converting the analog signal to a digital sample sequence via the ADC; performing, via a digital MRA compensation circuit, digital MRA compensation on the digital sample sequence; receiving, via a digital backend (DBE) subsystem, the digital sample sequence prior to digital MRA compensation; and generating, via a DBE, a bit sequence corresponding to the analog signal based on an output of the DBE subsystem and an output of the digital MRA compensation circuit.
09 - Scientific and electric apparatus and instruments
Goods & Services
Computer storage devices, namely, hard drives for computers;
data storage devices, namely, hard disk drives, blank
digital storage media; digital disk drives; removable hard
drive based computer backup systems; docking stations for
data storage devices; interfaces for computers; computer
hardware for upload, storage, retrieval, download,
transmission and delivery of digital content; computer
software for use in the synchronization, back-up, playing
and encryption and decryption of digital files, including
audio, video, text, binary, still images, graphics and
multimedia files; computer firmware for data storage, data
retrieval, data access, data backup, data replication, data
availability, data recovery, data translation and data
conversion; computer software for use in imaging,
duplicating and restoring the original factory level
instances of hard disk drive, for use in preserving and
restoring software programs and information in a computer,
for use in performing diagnostics on hard disk drives, for
use in connection with computer disk drives for the storage,
backup and retrieval of information, for use in connection
with data storage, data management and interconnection, and
management and operation of data storage devices, for use in
back-up of computer hard drive data, back-up of computer
networks, and data recovery.
The present disclosure relates to devices, circuits, and methods of determining power consumption in an electronic device (e.g., HDD) so that the determined power consumption can be used to determine a concentration of the gaseous oxidizing agent component in an interior gas space of the sealed enclosure and/or actively supply gaseous oxidizing agent component to the interior gas space of the electronic device if the determined power consumption is below a threshold value.
A data storage apparatus is presented that includes a well structure comprising a suspension medium, and a magnetic particle disposed in at least a portion of the well structure. A control system is configured to represent a data state corresponding to a positioning of the magnetic particle within the well structure, the magnetic particle moved responsive to an applied field and a present material state of the well structure. Various addressable arrays of well structures and associated control elements can be established to form data storage devices.
G11C 11/16 - Digital stores characterised by the use of particular electric or magnetic storage elementsStorage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
97.
Heat-assisted magnetic recording head with an integrated photodiode
A heat-assisted magnetic recording head includes a laser, a near-field transducer, a primary waveguide, a secondary waveguide, and a photodiode. The laser is configured to emit electromagnetic radiation. The near-field transducer is configured to focus and emit an optical near-field. The primary waveguide configured to receive the electromagnetic radiation and propagate the electromagnetic radiation toward and proximal to the near-field transducer. The secondary waveguide configured to receive a portion of the electromagnetic radiation from the primary waveguide. The photodiode configured to receive the portion of the electromagnetic radiation from the secondary waveguide and emit a signal that represents a magnitude of the electromagnetic radiation that the laser emits.
G11B 5/31 - Structure or manufacture of heads, e.g. inductive using thin film
G11B 5/48 - Disposition or mounting of heads relative to record carriers
G11B 5/60 - Fluid-dynamic spacing of heads from record carriers
G11B 7/126 - Circuits, methods or arrangements for laser control or stabilisation
G11B 13/08 - Recording simultaneously or selectively by methods or means covered by different main groupsRecord carriers thereforReproducing simultaneously or selectively therefrom using near-field interactions or transducing means and at least one other method or means for recording or reproducing
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
98.
Heat-assisted magnetic recording head near-field transducer with a hybrid plasmonic disk
A heat-assisted magnetic recording head comprises a near-field transducer (NFT). The NFT comprises a near-field emitter configured to heat a surface of a magnetic disk, and a hybrid plasmonic disk. The hybrid plasmonic disk comprises a plasmonic region and a thermal region. The plasmonic region comprises a first material or alloy that is a plasmonic material or alloy. The thermal region comprises a second material or alloy that is different than the first material or alloy.
G11B 13/08 - Recording simultaneously or selectively by methods or means covered by different main groupsRecord carriers thereforReproducing simultaneously or selectively therefrom using near-field interactions or transducing means and at least one other method or means for recording or reproducing
G11B 5/31 - Structure or manufacture of heads, e.g. inductive using thin film
G11B 5/48 - Disposition or mounting of heads relative to record carriers
G11B 5/60 - Fluid-dynamic spacing of heads from record carriers
G11B 5/00 - Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor
A method involves determining a threshold error rate that will result on data stored on a magnetic disk surface of a disk drive being unrecoverable. The method also involves determining a seek velocity that will overwrite sufficient portions of the data such the data will exhibit at least the threshold error rate. The disk drive performs at least one traversal of the magnetic disk surface with a head of the disk drive that emits an erase field during the at least one traversal at the seek velocity. The at least one traversal sanitizes the data.
Systems and methods are disclosed for implementing a low latency decoder. In certain embodiments, an apparatus may comprise decoder configured decode a codeword of bits, including: a variable node processor configured to provide a plurality of variable-to-check (v2c) message vectors to the edge combiner in parallel, the plurality of v2c message vectors including estimates for a selected set of bits of the codeword; the edge combiner configured to generate a plurality of output message vectors for a plurality of check node vectors based on the plurality of v2c message vectors, and provide the plurality of output message vectors to the plurality of check node vectors simultaneously; a check node processor configured to update the plurality of check node vectors based on the plurality of output message vectors; and a convergence checker circuit configured to detect a valid code word based on bit value estimates from the variable node processor.
H03M 13/00 - Coding, decoding or code conversion, for error detection or error correctionCoding theory basic assumptionsCoding boundsError probability evaluation methodsChannel modelsSimulation or testing of codes
H03M 13/11 - Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
