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 - Enregistrement sur, ou reproduction depuis le même support d'enregistrement, dans lesquels, pour ces deux opérations, les procédés ou les moyens sont couverts par différents groupes principaux des groupes ou par différents sous-groupes du groupe Supports d'enregistrement correspondants utilisant l'enregistrement par magnétisation ou démagnétisation
G11B 5/02 - Procédés d'enregistrement, de reproduction ou d'effacementCircuits correspondants pour la lecture, l'écriture ou l'effacement
G11B 27/36 - Contrôle, c.-à-d. surveillance du déroulement de l'enregistrement ou de la reproduction
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
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.
G11C 29/44 - Indication ou identification d'erreurs, p. ex. pour la réparation
G11C 16/34 - Détermination de l'état de programmation, p. ex. de la tension de seuil, de la surprogrammation ou de la sousprogrammation, de la rétention
G11C 29/12 - Dispositions intégrées pour les tests, p. ex. auto-test intégré [BIST]
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.
G11B 5/31 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
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 - Procédés ou appareils spécialement adaptés à la fabrication de supports d'enregistrement
B24B 9/06 - Machines ou dispositifs pour meuler les bords ou les biseaux des pièces ou pour enlever des bavuresAccessoires à cet effet caractérisés par le fait qu'ils sont spécialement étudiés en fonction des propriétés de la matière propre aux objets à meuler de matière inorganique non métallique, p. ex. de la pierre, des céramiques, de la porcelaine
B24B 9/10 - Machines ou dispositifs pour meuler les bords ou les biseaux des pièces ou pour enlever des bavuresAccessoires à cet effet caractérisés par le fait qu'ils sont spécialement étudiés en fonction des propriétés de la matière propre aux objets à meuler de matière inorganique non métallique, p. ex. de la pierre, des céramiques, de la porcelaine du verre des vitres
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 - Mémoires numériques caractérisées par l'utilisation d'éléments d'emmagasinage électriques ou magnétiques particuliersÉléments d'emmagasinage correspondants utilisant des éléments électriques utilisant des éléments ferro-électriques
G11C 7/10 - Dispositions d'interface d'entrée/sortie [E/S, I/O] de données, p. ex. circuits de commande E/S de données, mémoires tampon de données E/S
G11C 17/12 - Mémoires mortes programmables une seule foisMémoires semi-permanentes, p. ex. cartes d'information pouvant être replacées à la main utilisant des dispositifs à semi-conducteurs, p. ex. des éléments bipolaires dans lesquelles le contenu est déterminé lors de la fabrication par une disposition prédéterminée des éléments de couplage, p. ex. mémoires ROM programmables par masque utilisant des dispositifs à effet de champ
15.
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.
G11B 5/48 - Disposition ou montage des têtes par rapport aux supports d'enregistrement
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
G11B 5/31 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
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.
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
G11B 5/31 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
G11B 5/48 - Disposition ou montage des têtes par rapport aux supports d'enregistrement
G11B 5/60 - Maintien dynamique de l'écartement entre têtes et supports d'enregistrement à l'aide d'un fluide
20.
HARD DISK DRIVES WITH PIEZOELECTRIC ULTRASONIC MOTOR
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 - Adhésifs sous forme de films ou de pellicules caractérisés par des couches antiadhésives
C09J 133/08 - Homopolymères ou copolymères d'esters de l'acide acrylique
H01L 21/02 - Fabrication ou traitement des dispositifs à semi-conducteurs ou de leurs parties constitutives
H01L 21/673 - Appareils spécialement adaptés pour la manipulation des dispositifs à semi-conducteurs ou des dispositifs électriques à l'état solide pendant leur fabrication ou leur traitementAppareils spécialement adaptés pour la manipulation des plaquettes pendant la fabrication ou le traitement des dispositifs à semi-conducteurs ou des dispositifs électriques à l'état solide ou de leurs composants utilisant des supports spécialement adaptés
B05D 5/10 - Procédés pour appliquer des liquides ou d'autres matériaux fluides aux surfaces pour obtenir des effets, finis ou des structures de surface particuliers pour obtenir une surface adhésive
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 - Procédés ou appareils spécialement adaptés à la fabrication de supports d'enregistrement
B24B 9/06 - Machines ou dispositifs pour meuler les bords ou les biseaux des pièces ou pour enlever des bavuresAccessoires à cet effet caractérisés par le fait qu'ils sont spécialement étudiés en fonction des propriétés de la matière propre aux objets à meuler de matière inorganique non métallique, p. ex. de la pierre, des céramiques, de la porcelaine
B24B 9/10 - Machines ou dispositifs pour meuler les bords ou les biseaux des pièces ou pour enlever des bavuresAccessoires à cet effet caractérisés par le fait qu'ils sont spécialement étudiés en fonction des propriétés de la matière propre aux objets à meuler de matière inorganique non métallique, p. ex. de la pierre, des céramiques, de la porcelaine du verre des vitres
24.
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.
G06F 11/16 - Détection ou correction d'erreur dans une donnée par redondance dans le matériel
G06F 11/07 - Réaction à l'apparition d'un défaut, p. ex. tolérance de certains défauts
G06F 11/10 - Détection ou correction d'erreur par introduction de redondance dans la représentation des données, p. ex. en utilisant des codes de contrôle en ajoutant des chiffres binaires ou des symboles particuliers aux données exprimées suivant un code, p. ex. contrôle de parité, exclusion des 9 ou des 11
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.
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
G11B 5/008 - Enregistrement, reproduction ou effacement sur des bandes ou des fils magnétiques
G11B 5/02 - Procédés d'enregistrement, de reproduction ou d'effacementCircuits correspondants pour la lecture, l'écriture ou l'effacement
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.
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 ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
B81C 1/00 - Fabrication ou traitement de dispositifs ou de systèmes dans ou sur un substrat
B82B 1/00 - Nanostructures formées par manipulation d’atomes ou de molécules, ou d’ensembles limités d’atomes ou de molécules un à un comme des unités individuelles
B82Y 10/00 - Nanotechnologie pour le traitement, le stockage ou la transmission d’informations, p. ex. calcul quantique ou logique à un électron
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
G11B 11/24 - Enregistrement sur, ou reproduction depuis le même support d'enregistrement, dans lesquels, pour ces deux opérations, les procédés ou les moyens sont couverts par différents groupes principaux des groupes ou par différents sous-groupes du groupe Supports d'enregistrement correspondants utilisant l'enregistrement par des interactions en champ proche
H01F 10/30 - Pellicules magnétiques minces, p. ex. de structure à un domaine caractérisées par le substrat ou par les couches intermédiaires caractérisées par la composition des couches intermédiaires
H01L 21/3065 - Gravure par plasmaGravure au moyen d'ions réactifs
H01L 21/3213 - Gravure physique ou chimique des couches, p. ex. pour produire une couche avec une configuration donnée à partir d'une couche étendue déposée au préalable
H01L 21/67 - Appareils spécialement adaptés pour la manipulation des dispositifs à semi-conducteurs ou des dispositifs électriques à l'état solide pendant leur fabrication ou leur traitementAppareils spécialement adaptés pour la manipulation des plaquettes pendant la fabrication ou le traitement des dispositifs à semi-conducteurs ou des dispositifs électriques à l'état solide ou de leurs composants
30.
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 ou fabrication de la surface de la tête en contact physique avec le milieu d'enregistrement ou immédiatement adjacente à celui-ciPièces polairesEntrefers
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
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 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
G11B 5/66 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
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 ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
G11B 5/66 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
33.
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.
H04L 9/30 - Clé publique, c.-à-d. l'algorithme de chiffrement étant impossible à inverser par ordinateur et les clés de chiffrement des utilisateurs n'exigeant pas le secret
35.
PCSELS FOR OPTICAL NEURAL NETWORKS/PHOTONIC COMPUTING/NEUROMORPHIC COMPUTING
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 - Enregistrement sur, ou reproduction depuis le même support d'enregistrement, dans lesquels, pour ces deux opérations, les procédés ou les moyens sont couverts par différents groupes principaux des groupes ou par différents sous-groupes du groupe Supports d'enregistrement correspondants utilisant l'enregistrement par magnétisation ou démagnétisation utilisant un faisceau de lumière ou un champ magnétique pour l'enregistrement et un faisceau de lumière pour la reproduction, p. ex. enregistrement thermomagnétique induit par la lumière ou reproduction par l'effet Kerr
G11B 5/39 - Structure ou fabrication de têtes sensibles à un flux utilisant des dispositifs magnétorésistifs
G11B 5/48 - Disposition ou montage des têtes par rapport aux supports d'enregistrement
G11B 5/60 - Maintien dynamique de l'écartement entre têtes et supports d'enregistrement à l'aide d'un fluide
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 - Mémoires numériques caractérisées par l'utilisation d'éléments d'emmagasinage non couverts par les groupes , ou utilisant des éléments dont le fonctionnement dépend d'un changement chimique
C12P 19/34 - Polynucléotides, p. ex. acides nucléiques, oligoribonucléotides
41.
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 - Dispositions pour les communications secrètes ou protégéesProtocoles réseaux de sécurité l'appareil de chiffrement utilisant des registres à décalage ou des mémoires pour le codage par blocs, p. ex. système DES
44.
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 5/255 - Structure ou fabrication de la surface de la tête en contact physique avec le milieu d'enregistrement ou immédiatement adjacente à celui-ciPièces polairesEntrefers comprenant des moyens pour la protection contre l'usure
G11B 5/31 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
H01L 21/02 - Fabrication ou traitement des dispositifs à semi-conducteurs ou de leurs parties constitutives
H01L 21/285 - Dépôt de matériaux conducteurs ou isolants pour les électrodes à partir d'un gaz ou d'une vapeur, p. ex. condensation
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
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 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
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 5/31 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
C30B 25/04 - Dépôt suivant une configuration déterminée, p. ex. en utilisant des masques
G11B 5/105 - Montage de la tête à l'intérieur du boîtier
G11B 5/127 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction
G11B 5/84 - Procédés ou appareils spécialement adaptés à la fabrication de supports d'enregistrement
G11B 7/124 - Dispositions de têtes intégrées, p. ex. avec source et détecteurs montés sur le même substrat les dispositions des têtes intégrées comprenant des guides d'ondes
H01L 33/00 - DISPOSITIFS À SEMI-CONDUCTEURS NON COUVERTS PAR LA CLASSE - Détails
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
G11B 5/60 - Maintien dynamique de l'écartement entre têtes et supports d'enregistrement à l'aide d'un fluide
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.
G11C 13/04 - Mémoires numériques caractérisées par l'utilisation d'éléments d'emmagasinage non couverts par les groupes , ou utilisant des éléments optiques
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.
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.
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 - Mémoires numériques caractérisées par l'utilisation d'éléments d'emmagasinage électriques ou magnétiques particuliersÉléments d'emmagasinage correspondants utilisant des éléments magnétiques utilisant des éléments dans lesquels l'effet d'emmagasinage est basé sur l'effet de spin
53.
SYSTEMS, METHODS, AND DEVICES FOR MONITORING A GASEOUS OXIDIZING AGENT IN A DATA STORAGE DEVICE, AND RELATED SYSTEMS, METHODS, AND DEVICES
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 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 ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
G11B 5/48 - Disposition ou montage des têtes par rapport aux supports d'enregistrement
G11B 5/60 - Maintien dynamique de l'écartement entre têtes et supports d'enregistrement à l'aide d'un fluide
G11B 7/126 - Circuits, procédés ou dispositions pour la commande ou la stabilisation du laser
G11B 13/08 - Enregistrement utilisant simultanément ou sélectivement des procédés ou des moyens entrant dans des groupes principaux différentsSupports d'enregistrement correspondantsReproduction simultanée ou sélective correspondante utilisant des interactions ou des moyens de transduction en champ proche et au moins un autre procédé ou moyen pour l'enregistrement ou la reproduction
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
55.
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 - Enregistrement utilisant simultanément ou sélectivement des procédés ou des moyens entrant dans des groupes principaux différentsSupports d'enregistrement correspondantsReproduction simultanée ou sélective correspondante utilisant des interactions ou des moyens de transduction en champ proche et au moins un autre procédé ou moyen pour l'enregistrement ou la reproduction
G11B 5/31 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
G11B 5/48 - Disposition ou montage des têtes par rapport aux supports d'enregistrement
G11B 5/60 - Maintien dynamique de l'écartement entre têtes et supports d'enregistrement à l'aide d'un fluide
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
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 - Codage, décodage ou conversion de code pour détecter ou corriger des erreursHypothèses de base sur la théorie du codageLimites de codageMéthodes d'évaluation de la probabilité d'erreurModèles de canauxSimulation ou test des codes
H03M 13/11 - Détection d'erreurs ou correction d'erreurs transmises par redondance dans la représentation des données, c.-à-d. mots de code contenant plus de chiffres que les mots source utilisant un codage par blocs, c.-à-d. un nombre prédéterminé de bits de contrôle ajouté à un nombre prédéterminé de bits d'information utilisant plusieurs bits de parité
58.
SYSTEM AND METHODS FOR POSITIONING BIOMATERIAL ON A SUBSTRATE
The present disclosure describes a system and methods for positioning a configured number of biomaterials on a surface. The method disclosed includes the formation of a membrane mask structure including a configured number of nanopores. The nanopores are generally sized to be the same size as, or slightly larger than a single target biomaterial. The masking membrane is then adhered to a substrate. The substrate may include a raw substrate, or may be functionalized for the purpose of binding biomaterials with greater attraction. A solution including the target biomaterials is then exposed to the masking membrane. One biomaterial is able to adhere to the substrate through each nanopore. The solution is rinsed from the membrane surface leaving only the biomaterial that has adhered to the substrate with a relatively strong binding force. The masking membrane may then either remain or may be removed.
G01N 33/531 - Production de matériaux de tests immunochimiques
G01N 33/543 - Tests immunologiquesTests faisant intervenir la formation de liaisons biospécifiquesMatériaux à cet effet avec un support insoluble pour l'immobilisation de composés immunochimiques
Systems and methods are disclosed for implementing a high performance decoder. In certain embodiments, an apparatus may comprise a decoder circuit configured to decode a codeword of bits, including: a check node processor configured to provide a plurality of check to variable (c2v) messages to a variable node processor in parallel, the plurality of c2v messages including log likelihood ratio (LLR) data related a parity sum of multiple bits of the codeword; the variable node processor configured to generate a decision vector based on the plurality of c2v messages; and a convergence checker circuit configured to determine whether the codeword has been decoded based on the decision vector and output decoded data when the codeword has been decoded.
H03M 13/11 - Détection d'erreurs ou correction d'erreurs transmises par redondance dans la représentation des données, c.-à-d. mots de code contenant plus de chiffres que les mots source utilisant un codage par blocs, c.-à-d. un nombre prédéterminé de bits de contrôle ajouté à un nombre prédéterminé de bits d'information utilisant plusieurs bits de parité
H03M 13/00 - Codage, décodage ou conversion de code pour détecter ou corriger des erreursHypothèses de base sur la théorie du codageLimites de codageMéthodes d'évaluation de la probabilité d'erreurModèles de canauxSimulation ou test des codes
60.
SECURITY-ENHANCED DATA STORAGE DEVICE FOR AEROSPACE APPLICATIONS
A system for use in an aerospace environment includes an array of storage drives each comprising a non-radiation-hardened drive controller, a non-radiation-hardened, non-volatile, storage medium, and a non-radiation-hardened volatile memory. The system includes a radiation-tolerant storage controller coupled to the array. The storage controller provides failure-resistant data redundancy among the storage drives of the array. The system includes a bus host that accesses the array via the storage controller. The storage controller implements security logic and a root-of-trust that provides to the bus host verification of authenticity of the radiation tolerant storage controller and the storage drives.
Method and apparatus for managing a front-end cache formed of ferroelectric memory element (FME) cells. Prior to storage of writeback data associated with a pending write command from a client device, an intelligent cache manager circuit forwards a first status value indicative that sufficient capacity is available in the front-end cache for the writeback data. Non-requested speculative readback data previously transferred to the front-end cache from the main NVM memory store may be jettisoned to accommodate the writeback data. A second status value may be supplied to the client device if insufficient capacity is available to store the writeback data in the front-end cache, and a different, non-FME based cache may be used in such case. Mode select inputs can be supplied by the client device specify a particular quality of service level for the front-end cache, enabling selection of suitable writeback and speculative readback data processing strategies.
G06F 12/0802 - Adressage d’un niveau de mémoire dans lequel l’accès aux données ou aux blocs de données désirés nécessite des moyens d’adressage associatif, p. ex. mémoires cache
G06F 3/06 - Entrée numérique à partir de, ou sortie numérique vers des supports d'enregistrement
A data storage device comprising a recording head having a high damping magnetic alloy layer including at least one magnetic alloy element, and a 5d transition element; the high damping magnetic alloy layer having a mixed face-centered cubic (fcc) and body-centered cubic (bcc) crystal structure, and the mixed fcc and bcc crystal structure comprising fcc and bcc grains, with the bcc grains having an elongated shape relative to the fcc grains, a larger size than the fcc grains, and slip deformation, thereby providing the high damping magnetic alloy layer with a damping constant of up to about 0.07.
G11B 5/187 - Structure ou fabrication de la surface de la tête en contact physique avec le milieu d'enregistrement ou immédiatement adjacente à celui-ciPièces polairesEntrefers
C25D 3/56 - Dépôt électrochimiqueBains utilisés à partir de solutions d'alliages
C25D 5/18 - Dépôt au moyen de courant modulé, pulsé ou inversé
63.
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 5/60 - Maintien dynamique de l'écartement entre têtes et supports d'enregistrement à l'aide d'un fluide
G11B 5/31 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
G11B 13/08 - Enregistrement utilisant simultanément ou sélectivement des procédés ou des moyens entrant dans des groupes principaux différentsSupports d'enregistrement correspondantsReproduction simultanée ou sélective correspondante utilisant des interactions ou des moyens de transduction en champ proche et au moins un autre procédé ou moyen pour l'enregistrement ou la reproduction
G11B 7/126 - Circuits, procédés ou dispositions pour la commande ou la stabilisation du laser
G11B 5/48 - Disposition ou montage des têtes par rapport aux supports d'enregistrement
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
A data storage system includes an enclosure, a printed circuit board positioned in the enclosure, an integrated circuit mechanically and electrically coupled to the printed circuit board, temperature sensors configured to generate temperature signals in response to measured temperatures, an air mover coupled to the enclosure and including a motor rotatable in a clockwise direction and a counterclockwise direction, and a controller configured to cause rotation of the motor in either the clockwise direction or the counterclockwise direction depending on the temperature signals.
A data storage system may connect a host to a device and a hardware module that are utilized to satisfy at least one host-generated data access request to the device. A portion of the device is set as dormant by the hardware module prior to identifying an origin of the device with the hardware module during the satisfaction of the at least one host-generated data access request. In response to the identified origin, the previously dormant portion of the device is activated and subsequently utilized to execute a task assigned by the hardware module.
A data storage device includes at least one data storage medium. The data storage device also includes a workload rating associated with data access operations carried out on the at least one data storage medium. The data storage device further includes a controller configured to enable performance of the data access operations, and change a rate of consumption of the workload rating by internal device management operations carried out in the data storage device in response to a change in a workload consumed by host commands serviced by the data storage device.
Building DNA strands at a high rate that are suitable for data storage. Methods include using DNAzyme and utilizing libraries of pre-prepared oligos. A system for the DNA strand synthesis includes: a DNA symbol library comprising a number of single strand oligo symbols; a DNA linker library comprising a first set of single strand oligo linkers and a second set of single strand oligo linkers; and a DNAzyme library comprising a number of DNAzymes. An S1 end of a first DNAzyme is adapted to join the S1 end of a symbol and an S2 end of the first DNAzyme is adapted to join an S2 end of a first linker, and an S1 end of a second DNAzyme is adapted to join an S1 end of a second linker and an S2 end of the second DNAzyme is adapted to join an S2 end of the symbol.
A controller extracts a distortion component of a readback signal from a magnetic read head. The distortion component may be found using a finite length Volterra series, for example. The controller estimates a clearance between the read head and a recording medium based on the distortion component. This clearance measurement can be used for closed loop fly-height control of the read head.
Apparatus and method for executing controller memory buffer (CMB) based data transfer commands in a distributed data processing environment. In some embodiments, a storage device having a device controller and a main non-volatile memory (NVM) is coupled to a client device via an interface. The client device respectively issues normal data transfer commands and bypass data transfer commands to the storage device. The normal data transfer commands include read and write commands that result in transfer of data between the NVM and the client device using a normal data path through the storage device. The bypass data transfer commands involve an allocated CMB of the storage device directly controlled and accessed by the client device. In this way, write data are directly placed into the CMB for writing to the NVM, and readback data from the NVM are directly recovered from the CMB by the client device.
G06F 3/00 - Dispositions d'entrée pour le transfert de données destinées à être traitées sous une forme maniable par le calculateurDispositions de sortie pour le transfert de données de l'unité de traitement à l'unité de sortie, p. ex. dispositions d'interface
G06F 3/06 - Entrée numérique à partir de, ou sortie numérique vers des supports d'enregistrement
70.
Heat-assisted magnetic recording head with a bilayer adhesion structure
A heat-assisted magnetic recording head includes a first feature, a second feature, and a bilayer adhesion structure. The first feature includes a first primary metal. The second feature includes an oxide region, and a mixed metal oxide adhesion layer that is adhered to the oxide region and provided on a surface of the second feature. The bilayer adhesion structure includes the mixed metal oxide adhesion layer of the second feature, and a metal adhesion layer. The metal adhesion layer is disposed between and adhered to the first feature and the mixed metal oxide adhesion layer of the second feature. The metal adhesion layer includes a second primary metal that is different than the first primary metal.
G11B 5/40 - Moyens de protection des têtes, p. ex. contre une température excessive
G11B 5/31 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
G11B 13/08 - Enregistrement utilisant simultanément ou sélectivement des procédés ou des moyens entrant dans des groupes principaux différentsSupports d'enregistrement correspondantsReproduction simultanée ou sélective correspondante utilisant des interactions ou des moyens de transduction en champ proche et au moins un autre procédé ou moyen pour l'enregistrement ou la reproduction
G11B 5/60 - Maintien dynamique de l'écartement entre têtes et supports d'enregistrement à l'aide d'un fluide
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
71.
Laser feedback suppressor for heat-assisted magnetic recording
A recording head includes a channel waveguide that delivers light to a media-facing surface. A near-field transducer (NFT) is at an end of the channel waveguide and proximate to the media-facing surface. A laser including an active region has a longitudinal axis corresponding to a propagation direction of the channel waveguide. The active region includes a back facet and a front facet proximate the NFT. The front facet has a surface shape configured to suppress back reflection of the light.
G11B 5/48 - Disposition ou montage des têtes par rapport aux supports d'enregistrement
G11B 13/08 - Enregistrement utilisant simultanément ou sélectivement des procédés ou des moyens entrant dans des groupes principaux différentsSupports d'enregistrement correspondantsReproduction simultanée ou sélective correspondante utilisant des interactions ou des moyens de transduction en champ proche et au moins un autre procédé ou moyen pour l'enregistrement ou la reproduction
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
G11B 5/60 - Maintien dynamique de l'écartement entre têtes et supports d'enregistrement à l'aide d'un fluide
G11B 11/105 - Enregistrement sur, ou reproduction depuis le même support d'enregistrement, dans lesquels, pour ces deux opérations, les procédés ou les moyens sont couverts par différents groupes principaux des groupes ou par différents sous-groupes du groupe Supports d'enregistrement correspondants utilisant l'enregistrement par magnétisation ou démagnétisation utilisant un faisceau de lumière ou un champ magnétique pour l'enregistrement et un faisceau de lumière pour la reproduction, p. ex. enregistrement thermomagnétique induit par la lumière ou reproduction par l'effet Kerr
Described are electrodeposition methods, and materials and structures prepared by electrodeposition methods, and devices prepared from the electrodeposited materials.
The technology disclosed herein provides a method including receiving a plurality of input/output (IO) requests at an object store, removing one or more fields from each of the plurality of input/output (IO) requests to generate a plurality of condensed IO requests, transforming one or more fields of each of the plurality of condensed IO requests to generate transformed IO requests, combining a predetermined number of transformed IO requests to generate IO trace temporal sequences, generating machine learning (ML) model input feature vectors by assigning each of the IO trace temporal sequences a ground truth value indicating whether the IO trace temporal sequence represents a ransomware attack, and training an ML model using a plurality of the ML model input feature vectors.
A data storage apparatus includes a disk storage region in which magnetic disks are stored. A carrier mechanism picks up one or more of the magnetic disks and moves them to and from the disk storage region. A data access device of the apparatus includes a structure to receive the one or more magnetic disks from the carrier mechanism and spins the magnetic disks in place. One or more actuator arms are operable to move across a same surface of the one or more magnetic disks. Two or more read transducers are mounted to the actuator arms and operable to simultaneously read from the same surface of the one or more magnetic disks. Two or more write transducers are mounted to the actuator arms and operable to simultaneously write to the same surface of the one or more magnetic disks.
A non-local spin valve (NLSV) sensor includes a bearing surface and a detector located proximate to the bearing surface. The NLSV sensor also includes a channel layer located behind the detector relative to the bearing surface, and in a substantially same plane as the detector. The channel layer has a front end that is proximate to the detector and a rear end that is distal to the detector. The NLSV sensor further includes first and second spin injectors, with the first spin injector located proximate to the rear end of the channel layer and positioned above the channel layer, and the second spin injector located proximate the rear end of the channel layer and positioned below the channel layer.
G11B 5/39 - Structure ou fabrication de têtes sensibles à un flux utilisant des dispositifs magnétorésistifs
G01R 33/09 - Mesure de la direction ou de l'intensité de champs magnétiques ou de flux magnétiques en utilisant des dispositifs galvano-magnétiques des dispositifs magnéto-résistifs
G11B 5/33 - Structure ou fabrication de têtes sensibles à un flux
G11B 5/31 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
76.
Custom initialization in a distributed data storage system
A distributed data storage system can be configured with a host connected to a first device and an initialization module that performs a default initialization procedure on the first device in response to detecting the first device has an unknown manufacturing origin. Conducting the default initialization procedure may allow the first device to service data access requests from the host. In response to the connection of a second device to the host and initialization module, a manufacturing origin of the second device is identified with the initialization module before the initialization module customizes the default initialization procedure to a custom procedure that is executed to allow the second device to satisfy a background operation prescribed by the initialization module.
A distributed data storage system may connect a host to a device and a dedication module. The dedication module can identify a manufacturing origin of the device before dedicating a type of host-generated data access request to the device. The type of host-generated data access request is chosen by the dedication module in response to an operating capability correlated to the device by the dedication module based on the identified manufacturing origin. At least one host-generated request of the dedicated type is then completed with the device.
Apparatus and method for servicing data transfer commands in a computer environment using a selected protocol such as NVMe (Non-Volatile Memory Express). In some embodiments, a secure connection is established between a client device and a bridge device across an interface. A controller of the bridge device presents a unitary namespace as an available memory space to the client device. The controller further communicates with a plurality of downstream target devices to allocate individual namespaces within main memory stores of each of the target devices to form a consolidated namespace to support the unitary namespace presented to the controller. In this way, the bridge device can operate as an NVMe controller with respect to the client device for the unitary namespace, and as a virtual client device to each of the target devices which operate as embedded NVMe controllers for the individual namespaces.
Apparatus and method for executing hidden computational functions in a distributed data processing environment. In some embodiments, a trust boundary includes a target device such as a storage device, and a source device such as a client device in a computer network. A storage device processor executes a hidden command function (HCF) routine to accumulate HCF output data in a local cache responsive to an HCF command received from the client device over a data interface. The processor further establishes a smaller retention boundary within the trust boundary that includes the storage device and excludes the client device. The HCF output data are stored locally in a non-volatile memory (NVM) of the storage device while not transferring any portion of the HCF output data outside the retention boundary, including to the client device. The HCF routine can update a block-chain ledger or take some other form to provide data security.
A distributed data storage system can be configured with a host connected to a device and a distribution module. The distribution module identifies a manufacturing origin of the device and diverts a system operation from an upstream component connected to the distribution module to the device in response to the identified manufacturing origin of the device. The manufacturer installed operating parameters of the device are then used to complete the system operation.
Method and apparatus for offloading upstream processing tasks to peer groups of downstream data storage devices. A peer control circuit forms a peer group of storage devices in response to a detected processing bottleneck associated with a network controller. One of the storage devices in the peer group is designated as a primary device, and is responsible for interface communications, for subdividing the processing task for execution by secondary devices in the peer group, and coordinating overall execution. The peer group and the processing task are selected to avoid or minimize the processing bottleneck at the network controller level while maintaining ongoing data transfer performance at the storage device level. A list of available device resources and capabilities may be maintained by the peer control circuit. Offloaded tasks can include data rebuilds, cryptographic functions, new device authentication operations, and the like. Multiple overlapping peer groups can be formed as needed.
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 - Enregistrement utilisant simultanément ou sélectivement des procédés ou des moyens entrant dans des groupes principaux différentsSupports d'enregistrement correspondantsReproduction simultanée ou sélective correspondante utilisant des interactions ou des moyens de transduction en champ proche et au moins un autre procédé ou moyen pour l'enregistrement ou la reproduction
G11B 5/31 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
G11B 5/48 - Disposition ou montage des têtes par rapport aux supports d'enregistrement
G11B 5/60 - Maintien dynamique de l'écartement entre têtes et supports d'enregistrement à l'aide d'un fluide
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
A method includes generating a first control signal and a second control signal; blending the first control signal and the second control signal based, at least in part, on a velocity; and positioning a read/write head based on the blending of the first control signal and the second control signal.
G11B 5/596 - Disposition ou montage des têtes par rapport aux supports d'enregistrement comportant des dispositions pour déplacer la tête dans le but de maintenir l'alignement relatif de la tête et du support d'enregistrement pendant l'opération de transduction, p. ex. pour compenser les irrégularités de surface ou pour suivre les pistes du support pour suivre les pistes d'un disque
G11B 5/54 - Disposition ou montage des têtes par rapport aux supports d'enregistrement comportant des dispositions pour amener la tête dans sa position de travail, pour l'en écarter ou pour la déplacer en travers des pistes
The present disclosure includes barrier devices for use in an apparatus used to form lapping plates. The barrier devices can contain liquid on the surface of the lapping plate platen. The present disclosure also involves related methods.
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.
G11B 5/48 - Disposition ou montage des têtes par rapport aux supports d'enregistrement
G11B 5/60 - Maintien dynamique de l'écartement entre têtes et supports d'enregistrement à l'aide d'un fluide
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
86.
Prospective generation and storage of content for an alternate reality environment
An alternate reality, such as virtual reality or augmented reality, environment can experience optimized performance with a data system arranged with an interaction device connected to a virtual reality assembly. Base content and user content can respectively be downloaded and stored to a local data storage of the virtual reality assembly. The content may be utilized to proactively generate comprehensive content that consists of merged aspects of the base content and the user content. The comprehensive content can then be executed to create an immersive digital reality conveyed to a user via the interaction device.
G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur
G06F 3/04815 - Interaction s’effectuant dans un environnement basé sur des métaphores ou des objets avec un affichage tridimensionnel, p. ex. modification du point de vue de l’utilisateur par rapport à l’environnement ou l’objet
G06T 19/00 - Transformation de modèles ou d'images tridimensionnels [3D] pour infographie
Described are heat assisted magnetic read-write heads that include a coupler, a waveguide, a transducer, and appurtenant structures, as well as related methods.
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
G11B 13/08 - Enregistrement utilisant simultanément ou sélectivement des procédés ou des moyens entrant dans des groupes principaux différentsSupports d'enregistrement correspondantsReproduction simultanée ou sélective correspondante utilisant des interactions ou des moyens de transduction en champ proche et au moins un autre procédé ou moyen pour l'enregistrement ou la reproduction
G11B 5/012 - Enregistrement, reproduction ou effacement sur des disques magnétiques
G02B 6/42 - Couplage de guides de lumière avec des éléments opto-électroniques
Key rotation verification without decryption is provided. Two ciphertext inputs encrypted from a plaintext input by an encryption function using different cryptographic keys are input, wherein the encryption function is selected from a function family having an output space of one or more convex sets. A divergence between the two ciphertext inputs is computed. A membership oracle is executed on the two ciphertext inputs, wherein the two ciphertext inputs are determined to be members of the same convex set of the one or more convex sets if the computed divergence satisfies a separation condition. The two ciphertext inputs are validated to both correspond to the same plaintext input, responsive to determining that the two ciphertext inputs are members of the same convex set, wherein the two ciphertext inputs do not correspond to the same plaintext input if the two ciphertext inputs are not members of the same convex set.
H04L 9/16 - Dispositions pour les communications secrètes ou protégéesProtocoles réseaux de sécurité utilisant plusieurs clés ou algorithmes qui sont changés pendant l'opération
89.
Electronic device that includes a composition that can actively generate and release a gaseous oxidizing agent component into an interior space of the electronic device, and related subassemblies and methods
Electronic devices that include a composition that can generate a gaseous oxidizing agent component; and a generating device configured to actively cause the composition to generate the gaseous oxidizing agent component. The generating device includes at least one metal-air battery that is in electrical communication with a power source that is configured to apply power to the metal-air battery according to a predetermined time interval to recharge the metal-air battery to generate the gaseous oxidizing agent component.
A slider for use in a disk drive includes a substrate surface to be spaced from recording media surface within the disk drive, at least one read/write transducer having a transducer end surface adjacent and proximate to the substrate surface, a protrusion controller associated with the at least one read/write transducer. The transducer end surface includes a preformed protrusion extending generally in a direction perpendicular to the substrate surface, the protrusion is substantially centered along the transducer end surface, and the protrusion formed to passively provide a consistently-positioned close-point to the recording media surface when the protrusion controller is active.
Generation of randomness (e.g., a random value) using a protocol based on quantum weak coin flipping amongst a plurality of participating parties. The protocol allows computation of the exact initial bias and may include determining a number of rounds of exchange in a quantum weak coin flipping algorithm to achieve a predetermined maximum bias value. In turn, quantum weak coin flipping may be performed in a pair-wise fashion amongst all of the plurality of participating parties. A result of each pair-wise quantum weak coin flipping instance may be shared with another of the plurality of participating parties other than the parties participating in generating the result. In turn, the results of each pair-wise quantum weak coin flipping instance may be combined to provide a random value that may be used as a cryptographic key or as a seed to some cryptographic function.
Cryptographic sharing of a cryptographic secret among multiple parties provides a share of the cryptographic secret is generated for each party. Multiple threshold access structure tokens are generated for each party of the multiple parties. The threshold access structure tokens are generated for a party from one or more random token polynomials selected from a finite field based on the numbers of the multiple parties capable of attempting to reconstruct the cryptographic secret. The share of the cryptographic secret and the multiple threshold access structure tokens generated for each party are distributed to the corresponding party. At least a threshold number of the parties can reconstruct the cryptographic secret using the shares of the cryptographic secret and threshold access structure tokens corresponding to at least a threshold number of the parties attempting to reconstruct the cryptographic secret while less than the threshold number of parties cannot reconstruct the cryptographic secret.
A recording head has a near-field transducer proximate a media-facing surface of the recording head. A waveguide overlaps and delivers light to the near-field transducer, the light having a near-infrared wavelength. Two subwavelength focusing mirrors are at an end of the waveguide proximate the media-facing surface. The subwavelength mirrors are on opposite crosstrack sides of the near-field transducer and separated from a peg of the near-field transducer by a gap. The subwavelength focusing mirrors each include a core having a first edge exposed at the media-facing surface. The core formed of a core material that is resistant to mechanical wear and corrosion, such as a dielectric or robust metal. A liner covers a second edge of the core facing the near-field transducer. The liner includes a plasmonic metal that is has a plasmonic frequency in the ultraviolet range.
G11B 5/31 - Structure ou fabrication des têtes, p. ex. têtes à variation d'induction utilisant des films minces
G11B 7/1387 - Moyens pour guider le faisceau de la source au support d'enregistrement, ou du support d'enregistrement au détecteur utilisant l'effet de champ proche
G11B 5/48 - Disposition ou montage des têtes par rapport aux supports d'enregistrement
G11B 5/60 - Maintien dynamique de l'écartement entre têtes et supports d'enregistrement à l'aide d'un fluide
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
94.
HAMR recording head with external cavity laser using a near-field transducer as a reflector
An external cavity laser of a recording head includes a channel waveguide that delivers light towards a media-facing surface of the recording head. The laser includes an externally mounted part with an active region having a longitudinal axis corresponding to a light propagation direction of the channel waveguide. The externally mounted part has a reflective back facet and anti-reflective front facet. The laser includes a near-field transducer at an end of the channel waveguide proximate the media facing surface. The reflective back facet and the near-field transducer define a resonator of the external cavity laser.
G11B 11/105 - Enregistrement sur, ou reproduction depuis le même support d'enregistrement, dans lesquels, pour ces deux opérations, les procédés ou les moyens sont couverts par différents groupes principaux des groupes ou par différents sous-groupes du groupe Supports d'enregistrement correspondants utilisant l'enregistrement par magnétisation ou démagnétisation utilisant un faisceau de lumière ou un champ magnétique pour l'enregistrement et un faisceau de lumière pour la reproduction, p. ex. enregistrement thermomagnétique induit par la lumière ou reproduction par l'effet Kerr
G11B 5/00 - Enregistrement par magnétisation ou démagnétisation d'un support d'enregistrementReproduction par des moyens magnétiquesSupports d'enregistrement correspondants
G11B 13/08 - Enregistrement utilisant simultanément ou sélectivement des procédés ou des moyens entrant dans des groupes principaux différentsSupports d'enregistrement correspondantsReproduction simultanée ou sélective correspondante utilisant des interactions ou des moyens de transduction en champ proche et au moins un autre procédé ou moyen pour l'enregistrement ou la reproduction
H01S 5/0683 - Stabilisation des paramètres de sortie du laser en surveillant les paramètres optiques de sortie
H01S 5/12 - Structure ou forme du résonateur optique le résonateur ayant une structure périodique, p. ex. dans des lasers à rétroaction répartie [lasers DFB]
A brake crawler assembly configured for vertically moving an arm assembly along a pivot member in a multi-disk hard disk drive is provided. The brake crawler assembly includes a first clamp, including a first recess within which is disposed a first actuator and a first clamp calibration element. The first clamp calibration element includes a first clamp calibration access portion adapted to be accessible externally of the first clamp and adapted to receive a first external adjustment and a first clamp internal compression modifier adapted to modify a force exerted by the first actuator on the first recess, responsive to the received first external adjustment, wherein the first clamp is configured to selectively engage the pivot member at a position along the pivot member relative to at least one disk of the multi-disk hard disk drive based on the modified force exerted.
A data storage system includes a plurality of data storage drives, and a system controller coupled to each data storage drive of the plurality of data storage drives. The system controller is configured to store internal drive management data for each data storage drive of the plurality of data storage drives.
Described are methods for processing microelectronic device substrates by a lapping step, e.g., a final lapping step, wherein the step includes the use of an elastomeric pressure-sensitive adhesive to secure the microelectronic device substrate to a carrier that holds the substrate to a surface of the carrier during the lapping step, and wherein the pressure-sensitive adhesive can be a non-polysilicone based adhesive having mechanical properties that include a tan delta that is below about 0.2.
H01L 21/304 - Traitement mécanique, p. ex. meulage, polissage, coupe
H01L 21/683 - Appareils spécialement adaptés pour la manipulation des dispositifs à semi-conducteurs ou des dispositifs électriques à l'état solide pendant leur fabrication ou leur traitementAppareils spécialement adaptés pour la manipulation des plaquettes pendant la fabrication ou le traitement des dispositifs à semi-conducteurs ou des dispositifs électriques à l'état solide ou de leurs composants pour le maintien ou la préhension
C09J 175/08 - Polyuréthanes à partir de polyéthers
98.
Maintaining real-time cache coherency during distributed computational functions
Apparatus and method for maintaining real-time coherency between a local cache of a target device and a client cache of a source device during execution of a distributed computational function. In some embodiments, a source device, such as a host computer, is coupled via a network interface to a target device, such as a data storage device. A storage compute function (SCF) command is transferred from the source device to the target device. A local cache of the target device accumulates output data during the execution of an associated SCF over an execution time interval. Real-time coherency is maintained between the contents of the local cache and a client cache of the source device, so that the client cache retains continuously updated copies of the contents of the local cache during execution of the SCF. The coherency can be carried out on a time-based granularity or an operational granularity.
A data storage system for use in a high radiation environment includes an array of storage drives. Each storage drive includes a non-radiation-hardened drive controller, a non-radiation-hardened, non-volatile, storage medium, and a non-radiation-hardened volatile memory. The system includes a radiation-hardened storage controller coupled to the array. The radiation-hardened storage controller provides failure-resistant data redundancy among the storage drives of the array and provides host access to the array.
A method for depositing a material from a solution to a surface is provided. The method includes depositing, through a deposition channel of a material depositor, the solution in a rich state to the surface, wherein the solution in the rich state includes an initial concentration of the material, onto a surface, applying a predefined electrical output, by the material depositor, through the deposited solution to adhere the material to the surface, and to yield the solution in a depleted state wherein the solution in the depleted state contains a different concentration of the material from the rich solution, and removing, through a removal channel in the material depositor, the deposited solution in the depleted state. The material depositor includes a hydrophilic region defined by a hydrophilic surface through which the material depositor conducts the depositing and the removing and a hydrophobic barrier circumscribing the hydrophilic region.
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