Abstract: Methods are described for forming a mounting surface on a slider body. In one method, an adhesion layer can be deposited on a top surface of a slider body. A first photolithography cycle deposits a first metal layer having a first thickness of at least 8 ?m. A second photolithography cycle deposits a second metal layer having a second thickness of at least 8 ?m over the first metal layer. The first and second layer form a mounting support on the top surface. In another method, the top surface is etched to form a mounting support.

Abstract: A defect inspection system provides an image of a surface of a hard drive media to a machine learning model that is trained to identify predefined classifications of abnormal surface patterns on the hard drive media, each of the predefined classifications being associated in system memory with a severity indicator. The defect inspection model analyzes the image and generates and output indicating that the image includes a pattern consistent with a select classification of the predefined classifications of abnormal surface patterns. When the severity indicator for the select classification satisfies a failure condition, the defect inspection system automatically implements a corrective action.

Abstract: Two or more data values are received from one or more sensors of a hard disk drive. The two or more data values are indicative of a fly height of a recording head of the hard disk drive. The two or more data values are input into a machine-learning processor during operation of the hard disk drive. A fly height of the recording head during the operation of the hard drive head is adjusted based on an output of the machine learning processor.

Abstract: A system and a method use an application on a mobile device to transfer internet media content to a rendering device in a home network. The application may use an HTML rendering engine to display a web page to a user of the mobile device, and the web page may have controls for accessing the internet media content. The application may receive a user interaction signal which may indicate that a user invoked one of the controls for accessing the internet media content. In response, the application may initiate transfer of the internet media content to the rendering device in the home network and/or may queue the internet media content for later playback using the rendering device.

Abstract: Components are extracted from user data being read from a reader of a hard disk drive. The components collectively indicate both a magnitude and direction of a read offset of the reader over a track. The components are input to a machine-learning processor during operation of the hard disk drive, causing the machine-learning processor to produce an output. A read offset of the reader is estimated during the operation of the hard drive head based on the output of the machine learning processor. While reading the user data, a radial position of the reader over the track is adjusted via an actuator based on the estimated read offset.

Abstract: A heat-assisted magnetic recording head includes a near-field transducer, a heat sink, a diffuser, and a diffusion barrier. The near-field transducer is configured to produce a hot spot on a proximate magnetic disk. The heat sink is configured to draw heat away from the near-field transducer. The heat sink is disposed in a down-track direction relative to and coupled to the near-field transducer. The diffuser is configured to draw heat away from the heat sink. The diffuser is disposed in a down-track direction relative to the heat sink. The diffusion barrier includes a metal. The diffusion barrier is disposed between and coupled to the heat sink and the diffuser.

Abstract: A DNA sequencing device and methods of making. The device includes a pair of electrodes having a spacing of no greater than about 2 nm, the electrodes being exposed within a nanopore to measure a DNA strand passing through the nanopore. The device can be made by depositing a conductive layer over a sacrificial channel and then removing the sacrificial channel to form the electrode gap.

Abstract: A data storage device can employ a front end bus for boot operations. The physical connection of a secure boot assembly to the front end bus can provide efficient and reliable booting of the data storage device without a connection to a remote host or network. A secure boot assembly can provide a security module that connects to the boot module of the data storage device to authenticate a trustworthiness of the data storage device while the data storage device is disconnected from any remote host.

Abstract: A method for distributed and private symmetric searchable encryption includes receiving encrypted data, creating a search index for one or more servers based on the encrypted data using a distributed point function (DPF), splitting the encrypted data into a number of portions based on the number of servers, and partitioning the servers into two or more groups. The method also includes updating the search index based on the splitting and the partitioning, transmitting the split encrypted data to the servers based on the updated search index, verifying the transmitted data using data not transmitted to the server, and determining, based on the verifying, whether any server deviated from an assigned protocol.

Abstract: A system for DNA gene assembly that utilizes a DNA symbol library and a DNA linker library. The symbol library has a number of DNA symbols each having a first overhanging end and a second overhanging end different than and non-complimentary to the first end, the first and second ends being the same nucleotides for each DNA symbol. The linker library has pairs of DNA linkers, a first linker of a pair having a first end and a second end and a second linker of the pair having a first end and a second end, the first end of the first linker being the same nucleotides for each first linker and the second end of the second linker being the same nucleotides for each second linker, wherein the second end of the first linker and the first end of the second linker have complementary nucleotides. The first linker joins to the first end of a DNA symbol and the second linker joins to the second end of another DNA symbol.

Abstract: Method and apparatus for intelligent caching, protection and transfers of data between a cache and a main memory in a data storage environment, such as but not limited to a solid-state drive (SSD). A main memory (MM) has non-volatile memory (NVM) cells configured for persistent storage of user data. A fast response cache (FRC) has NVM cells configured to provide storage of first data prior to transfer to the MM. A write cache (WC) has NVM cells configured to provide storage of second data prior to transfer to the MM. A controller directs input data to either the FRC or the WC. A first type of error correction encoding (ECC1) is applied to the first data and a different, second type of error correction encoding (ECC2) is applied to the second data. Data may be sent from the FRC to the MM either directly or through the WC.

Abstract: The present invention is directed to the fabrication of head sliders for use in hard disk drives, and in particular the provision and usage of electrical bond pads on the slider surface structure to accommodate needs of the fabrication process as well as slider operation within a disk drive.

Abstract: An active metasurface includes a number of periodically-repeated unit cells arranged on a substrate that each include a plasmonic waveguide shaped and sized to provide a cutoff mode that captures light of a target wavelength. The active metasurface includes an index modulation controller that controllably varies a voltage differential across each one of the periodically-repeated cells to change a phase of light incident on the metasurface.

Abstract: A system includes memory and one or more processors programmed to operate a logical layer, a media link layer, and a slot layer. The logical layer is configured to send and receive object data to a host according to an object storage protocol. The media link layer is configured to map the object data to virtual media addresses. The slot layer is configured to map the virtual media addresses to physical addresses of data storage devices.

Abstract: An alternating phase-shifting mask (Alt-PSM) comprising a 0° phase portion having a first width and a 180° phase portion having a second width greater than the first width. Example differences between the width of the 180° phase portion and the 0° phase portion may be 10 nm, 15 nm, or 20 nm. An Alt-PSM having phase portions of different widths can have an aerial image intensity transmission graph that is symmetric, for example, at 0.2-0.3 intensity.

Abstract: For each seek command of a plurality of seek commands of a hard disk drive, a correction value is determined that adjusts an access time of the seek command. The correction value includes a scaling factor that adjusts an energy variable. The scaling factor is based on a power target of the hard disk drive, and the energy variable may represent an energy used in the seek command as a time value. The seek commands are sorted in a command queue by the adjusted access times. The seek commands are executed by a controller of the hard disk drive based on the sorting within the command queue.

Abstract: A reader of a magnetic recording head includes a sensor stack, a first side shield and a second side shield disposed on opposite sides of the sensor stack in a cross-track dimension, and a bridge. The bridge is configured to align magnetic moments of the first side shield and the second side shield. The bridge is disposed above the sensor stack relative to a media-facing surface of the magnetic recording head and proximate to the first side shield and the second side shield.

Abstract: Apparatus and method for transferring data in a data storage system, such as but not limited to a hard disc drive (HDD). An optical link is provided between an analog front end (AFE) of a data storage device controller circuit (SOC) and a preamplifier/driver circuit (preamp) mounted to a rotary actuator to transfer an analog domain signal. A selected component is extracted from the signal using a modulation element such as a micro-resonance ring (MRR) or a Mach-Zehnder Interferometer Modulation (MZM) device. The extracted component is forwarded to a processing circuit to facilitate a transfer of data between a local memory and a non-volatile memory (NVM). The optical link includes a flexible portion in a flex circuit affixed to the rotary actuator and which supports the preamp. Multiplexed read, write, and power control signals are concurrently transmitted via the optical link. The link can concurrently service multiple head-disc assemblies (HDAs).

Abstract: A hybrid storage device with three-level memory mapping is provided. An illustrative device comprises a primary storage device comprising a plurality of primary sub-blocks; a cache memory device comprising a plurality of cache sub-blocks implemented as a cache for the primary storage device; and a controller configured to map at least one portion of one or more primary sub-blocks of the primary storage device stored in the cache to a physical location in the cache memory device using at least one table identifying portions of the primary storage device that are cached in one or more of the cache sub-blocks of the cache memory device, wherein a size of the at least one table is independent of a capacity of the primary storage device.

Abstract: The present disclosure includes embodiments of an electronic device having a housing that defines an interior gas space, and desiccant disposed therein. The desiccant includes one or more zeolite compositions to manage the relative humidity of the interior gas space.