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Disk Drive patents



      

This page is updated frequently with new Disk Drive-related patent applications.




Date/App# patent app List of recent Disk Drive-related patents
05/19/16
20160140996 
 Disk separator plates and  making disk separator plates for hard disk drives patent thumbnailnew patent Disk separator plates and making disk separator plates for hard disk drives
A hard disk drive with a multiple disk stack normally utilizes disk separator plates near the disk surfaces to reduce wind induced vibrations in the disks and the read/write heads. The manufacturing methods currently used to make these separator plates, metal casting and machining, or injection molded plastic, or extruding and machining, or cold forging tends to be expensive and creates unwanted weight and bulk without the desired precision.
Intri-plex Technologies, Inc.


05/19/16
20160140995 
 Servo processor receiving photodetector signals patent thumbnailnew patent Servo processor receiving photodetector signals
An optical disk drive and a digital servo method for the optical disk drive includes controlling functions of the optical disk drive with a microprocessor. Low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk are received.
Optical Devices, Llc


05/19/16
20160139840 
 Error tolerant or streaming storage device patent thumbnailnew patent Error tolerant or streaming storage device
A method of storing data includes receiving general purpose (gp) data and special error tolerant or streaming (ets) data, storing the gp data using a data storage method, and storing the ets data using a different data storage method which affects the access rate, resilience to errors, data integrity, storage density, or storage capacity. The storage medium, which can include a disk drive, flash memory, or holographic memory, is utilized differently depending on the required quality of service in aspects including block size, storage of error correction codes, utilization of error correction codes, storage area density, physical format pattern, storage verification, or reaction to failed storage verification.

05/19/16
20160139821 
 Tier based data file management patent thumbnailnew patent Tier based data file management
A hierarchal storage management method is provided. The method includes detecting a first portion of a first file being deleted from a hybrid storage device including a hard disk drive (hdd) memory device, a solid state drive (ssd) memory device, and an archival storage memory device.
International Business Machines Corporation


05/12/16
20160133825 
 Piezoelectric layer, piezoelectric component, piezoelectric actuator, piezoelectric sensor, hard-disk drive and ink jet printer patent thumbnailPiezoelectric layer, piezoelectric component, piezoelectric actuator, piezoelectric sensor, hard-disk drive and ink jet printer
A piezoelectric layer made of potassium sodium niobate which is a perovskite type compound represented by the formula abo3, wherein, in the raman spectroscopy measurement of the piezoelectric layer which is performed while the piezoelectric layer is rotated in the in-plane direction, the measured intensity of the lattice vibration region of the perovskite type compound in the raman spectrum obtained in polarized raman spectroscopy measurement (yx) has a periodicity of approximately 90°, wherein, the polarized raman spectroscopy measurement (yx) is performed while the piezoelectric layer is rotated in the in-plane direction and raman scattering light is polarized in a direction perpendicular to that of the incident light.. .
Tdk Corporation


05/12/16
20160132080 
 Tool-less mounting device for hard disk drive patent thumbnailTool-less mounting device for hard disk drive
A tool-less mounting device for hard disk drive (hdd) is provided. The mounting device has a tray, at least one flexible member, a backplane, and at least one hdd.
Inventec Corporation


05/12/16
20160131190 
 Pivot assembly bearing and disk drive device patent thumbnailPivot assembly bearing and disk drive device
A pivot assembly bearing includes: a sleeve, a shaft inserted into the sleeve, a pair of rolling bearings disposed between the sleeve and the shaft such that the rolling bearings are separated apart from each other in an axial direction. The rolling bearings include an inner ring fixed to the shaft, an outer ring fixed to the sleeve, and a rolling element provided between the inner ring and the outer ring.
Minebea Co., Ltd.


05/05/16
20160127706 
 True-color environment correction device and true-color environment correction method patent thumbnailTrue-color environment correction device and true-color environment correction method
An object is to accurately provide the user with color fidelity information irrespective of difference in the time of day when or in the location where a commercial product is photographed and prevent mismatching of the user's selection of the commercial product. A color fidelity environment correction system 1 includes a camera 2 and a computer 5 that is connectable with the camera 2, a tablet terminal 3 and a display device 4 and is configured to include a cpu, a rom, a ram, a hard disk drive and a bus line.
Papalab Co., Ltd.


05/05/16
20160125205 
 Session-level-restriction for universal serial bus storage devices patent thumbnailSession-level-restriction for universal serial bus storage devices
A system and method of implementing slr for a usb device of an information handling system is disclosed herein. An os may load a disk driver stack and a volume driver stack for the usb device, where the usb device is being enumerated by a first driver.
Dell Products L.p.


05/05/16
20160124681 
 Tracking hot areas of disk drive patent thumbnailTracking hot areas of disk drive
Methods, apparatuses, systems, and devices are described for determining use of areas of a disk drive. In one method, a score of an area node of the disk drive may be increased each time the area node is accessed during a time interval of a series of time intervals.
Seagate Technology Llc


05/05/16
20160124677 

Optical cold storage


Various embodiments (“systems”) are described for transferring data from a primary storage (e.g., magnetic disk drives, solid state drives, etc.) to an optical cold storage rack. The optical cold storage rack may include many physical optical storage disks, but a much smaller number of burners and readers (e.g., optical disk drives).
Facebook, Inc.


05/05/16
20160124652 

Methods and systems for determining hardware sizing for storage array systems


Methods and systems for enabling sizing of storage array resources are provided. Resources of a storage array can include, for example, cache, memory, ssd cache, central processing unit (cpu), storage capacity, number of hard disk drives (hdd), etc.
Nimble Storage, Inc.


04/28/16
20160118068 

Pivot assembly bearing and hard disk drive device


A pivot assembly bearing includes a shaft, a sleeve provided coaxially with the shaft, and a pair of rolling bearings arranged to be separated from each other in an axial direction between the shaft and the sleeve. The sleeve includes a ventilation path configured to communicate a region surrounded by the shaft, the pair of rolling bearings, and the sleeve with the outside of the sleeve..
Minebea Co., Ltd.


04/28/16
20160117233 

Quasi disk drive for testing disk interface performance


Embodiments relate to diagnostic evaluation of hardware components of a computer machine. A conventional storage device is replaced with a modified storage device.
International Business Machines Corporation


04/21/16
20160111117 

Flexure chain blank sheet for disk drive suspension


A flexure chain blank sheet includes frame units. Each frame unit includes a frame portion, and flexure elements.

04/21/16
20160111116 

Flexure chain blank sheet for disk drive suspension


A flexure chain blank sheet includes a plurality of frame units. Each of the frame units includes a frame portion, and a plurality of flexure elements arranged within the frame portion.

04/21/16
20160110118 

Storage of data reference blocks and deltas in different storage devices


A data storage architecture is composed of an array of a flash memory solid state disk and a hard disk drive or any nonvolatile random access storage that are intelligently coupled by an intelligent processing unit such as a multi-core graphic processing unit. The solid state disk stores seldom-changed and mostly read reference data blocks while the hard disk drive stores compressed deltas between currently accessed i/o blocks and their corresponding reference blocks in the solid state disk so that random writes are not performed on the solid state disk during online i/o operations.

04/14/16
20160104515 

Re-workable sealed hard disk drives, cover seals therefor, and related methods


Cover seals for sealing of a re-workable hard disk drive comprise: a metallic substrate; an outwardly exposed adhesive layer on at least a portion of a major surface of the metallic substrate; and an adhesive-free border comprising a fusible metal alloy layer surrounding the adhesive layer. The cover seals can be used to form sealed hard disk drives, wherein a cover seal is attached to an exterior surface of the cover of an enclosed hard disk drive housing so that an adhesive layer of the cover seal covers the entire junction where the base and cover components of the enclosed housing meet and a metallic joint adheres a perimeter of the cover seal to the base of the enclosed housing..

04/14/16
20160104503 

Low resistance ground joints for dual stage actuation disk drive suspensions


A stainless steel dual stage actuated disk drive head suspension baseplate including a plated electrical contact area having nickel and gold. The baseplate can be heat treated.

04/14/16
20160103624 

System and raid management, reallocation, and restripping


The present disclosure relates to systems and methods for raid restriping. One method includes selecting an initial raid device for migration based on at least one score, creating an alternate raid device, moving data from the initial raid device to the alternate raid device, and removing the initial raid device.

04/14/16
20160103470 

Electronic device system


An electronic device system includes an enclosure with a side plate, a main board, a first hard disk drive, and a first bracket. The main board and the first bracket are located inside the enclosure.

04/07/16
20160099631 

Spindle motor and hard disk drive including the same


A spindle motor includes a stator including a sleeve, and a rotor forming a bearing clearance with the sleeve, the bearing clearance being filled with a lubricating fluid. The rotor includes a stopper member forming a sealing part with the sleeve, in which a liquid-vapor interface is formed, and at least one of the stopper member and a surface of the sleeve disposed to face the stopper member is provided with an impact alleviating part formed therein to alleviate external impacts..
Samsung Electro-mechanics Co., Ltd.


03/31/16
20160093792 

Thin-film piezoelectric material element, manufacturing the same, head gimbal assembly, hard disk drive, ink jet head, variable focus lens and sensor


A thin-film piezoelectric material element includes a lower electrode film, a piezoelectric material film, and an upper electrode film, the lower electrode film, the piezoelectric material film and the upper electrode film are laminated sequentially. An upper surface of the piezoelectric material film is a concavity and convexity surface having a convex part and a concave part, the convex part is a curved surface convexly projected, and the concave part is a curved surface concavely hollowed, the upper electrode film is formed on the concavity and convexity surface.
Sae Magnetics (h.k.) Ltd.


03/31/16
20160092555 

Data aging in hana using grading attributes


According to an embodiment of the present disclosures, systems, methods, and non-transitory computer-readable mediums having program instructions thereon, provide for process of segregating data from database tables into different layers depending on the frequency of access to the data—so that each layer of the data can be stored in an appropriate storage mechanism. For example, infrequently-accessed data can be stored in a hard disk drive (hdd) and frequently-accessed can be stored in random-access memory (ram).

03/24/16
20160086625 

Circuit connection pad design for improved electrical robustness using conductive epoxy


Disk drives including head suspensions within dual stage actuation systems have improved electrical connectivity between electrical connection pads from flexible circuits as are applied to head suspension assemblies with piezoelectric microactuators as also provided to head suspension assemblies. A more robust electrical connection provides for better control of microactuator actuation for fine movements and positioning of magnetic read/write heads relative to disk data tracks as part of dual stage actuated suspension systems.
Seagate Technology Llc


03/24/16
20160085649 

Disk drive repair


According to an example, to repair a disk drive error, a determination is made if a disk field-repair is possible, if an operating system recovery image is available, and if any failed sectors exist in the operating system recovery image. A user is prompted to begin a repair.
Hewlett-packard Development Company, L.p.


03/24/16
20160085457 

Write reordering in a hybrid disk drive


A hybrid drive and associated methods increase the rate at which data are transferred to a nonvolatile storage medium in the hybrid drive. By using a large nonvolatile solid state memory device as cache memory for a magnetic disk drive, a very large number of write commands can be cached and subsequently reordered and executed in an efficient manner.
Kabushiki Kaisha Toshiba


03/17/16
20160078896 

Spindle motor and hard disk drive including the same


A spindle motor includes a stator, and a rotor forming a bearing clearance with the stator. The rotor is provided with an insertion groove formed therein into which a portion of the stator is inserted, and first and second sealing parts having liquid-vapor interfaces formed therein, respectively, are formed inside and outside the insertion groove, respectively.
Samsung Electro-mechanics Co., Ltd.


03/17/16
20160078895 

Spindle motor and hard disk drive including the same


A spindle motor includes a stator, and a rotor forming a bearing clearance filled with a lubricating fluid, together with the stator. At least one of the rotor and the stator is provided with a circulation hole through which air bubbles contained in the lubricating fluid are discharged, and a portion of the bearing clearance connected to one end portion of the circulation hole and disposed at an outer side of the circulation hole in a radial direction has a width allowing an amount of force applied to the other side of the air bubble to be less than that of force applied to one side of the air bubble when one side of the air bubble is disposed in the circulation hole and the other side thereof is disposed in the portion of the bearing clearance connected to the circulation hole..
Samsung Electro-mechanics Co., Ltd.


03/17/16
20160078054 

File system extension system and method


A file system extension (fse) system and method that permits an on-disk-structure (ods) incorporating spatially diverse data (sdd) to be stored on a daisy-chain of multiple sata disk drive storage elements (dse) that are coupled together with one or more pass-thru disk drive controllers (ptddc) is disclosed. The ptddc chain appears as a single logical disk drive to a host computer system (hcs) via a host bus adapter (hba) or pass-thru input (pti) port.

03/10/16
20160073546 

Server chassis with different width front end module


Embodiments generally relate to a optimizing the design of a chassis, such that the chassis features a different width front end hard disk drive module. Key components of the design include chassis flexibility for different hard drive quantities, and sliding rails which can be installed for sliding the chassis in and out of the rack, taking into account the housing contours of both the chassis and the front end hard disk drive module of different width.
Quanta Computer Inc.


03/10/16
20160073164 

Server-based program recording scheduling


A dvr sends, over the internet, to a server, information that indicates a set of programs. The information also may indicate a ranking of the programs in the set relative to each other.
Tivo Inc.


03/10/16
20160071533 

Interleave circuit of conductive circuit portion of disk drive flexure


An interleave circuit includes a metal base, an insulating layer, a first conductor member having first branch conductors, a second conductor member having second branch conductors, and a jumper conductor, which is a part of the metal base. The jumper conductor includes a branch-side metal portion, a pad-side metal portion, and a bridge portion.
Nhk Spring Co., Ltd.


03/10/16
20160070500 

System, method, and computer program product for detecting access to a memory device


Discrete events that take place with respect to a hard disk drive or other i/o device or port are indicated to logic that implements self-monitoring analysis and reporting technology (smart) or similar technology. These events are communicated to smart as event data.
Stroz Friedberg, Inc.


03/10/16
20160070317 

Mounting system for hard disk drive


A mounting system includes a case, a holding plate, and two resilient members. The case includes a bottom plate and two side plates extending from the bottom plate.
Hon Hai Precision Industry Co., Ltd.


03/03/16
20160059368 

Method and forming a hard disk drive base plate with an extended height


A method for forming a hard disk drive base plate with an extended height is described. The method may include forming an initial hard disk drive base plate, forming a filler shim, and forming a shroud.
Cheung Woh Technologies Ltd.


02/25/16
20160056675 

Brushless motor and disk drive apparatus


A brushless motor includes a stationary unit and a rotary unit rotatably supported with respect to the stationary unit. The stationary unit includes an armature and a base member arranged to support the armature.
Nidec Corporation


02/25/16
20160055340 

Location based disk drive access


Methods, apparatuses, systems, and devices are described for providing data security. In one method, data security is provided for a computing device having a data storage drive.
Seagate Technology Llc


02/18/16
20160048342 

Reducing read/write overhead in a storage array


Techniques, systems, and devices are disclosed for reducing data read/write overhead in a storage array, such as a redundant array of independent disks (raid), by dynamically configuring stripe sizes in disk drives. In one aspect, each disk drive is configured with multiple stripe sizes based on statistical file sizes of incoming data traffic.
Facebook, Inc.


02/18/16
20160044860 

Metering unit for granular material


Disclosed is a metering unit for granular material with a conveyor disk driven by a drive motor and rotating approximately concentrically to an inner cover surface of a housing. The conveyor disk has a recess for the reception of at least one grain to be separated via at least one revolution of the conveyor disk.
Horsch Maschinen Gmbh


02/11/16
20160042752 

Apparatus, systems and processes for reducing a hard disk drive's access time and concomitant power optimization


Rotational latency is reduced in a standard conventional form factor hdd system by replacing, for example—the prior art rotary arm actuator of a conventional hdd, with one or more belts and pulleys and one or more read/write heads mounted on, or otherwise associated with the belts. Multiple scaled iterations facilitate energy savings and power optimized systems, without compromise to data access performance..
L2 Drive Llc


02/11/16
20160041782 

Storage device copying of a larger system to a smaller system


Creating a cloned version of a system storage device that contains less capacity than the used space of the original system storage device and the means to prevent the user from making the cloned disk unbootable. A software program can run on a computer and a backup device such as a disk drive, thumb drive, or solid state drive.

02/04/16
20160034215 

Indication of a destructive write via a notification from a disk drive that emulates blocks of a first block size within blocks of a second block size


A disk drive receives a request to write at least one block of a first block size, wherein the disk drive is configured to store blocks of a second block size that is larger in size than the first block size. The disk drive stores a plurality of emulated blocks of the first block size in each block of the second block size.
International Business Machines Corporation


01/28/16
20160027463 

Servo processor receiving photodetector signals


A digital servo method for an optical disk drive includes receiving low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk. Versions of the photodetector signals are digitized to produce digital signals.
Optical Devices, Llc


01/28/16
20160026810 

Method for protecting data stored within a disk drive of a portable computer


A portable computer capable of protecting an encryption key that is sent out to a disk drive after a preboot process has ended is disclosed. The portable computer includes a disk drive for encrypting a volume as a whole, and for decoding data at the volume in response to a receipt of an encryption key from a system.
Lenovo (singapore) Pte. Ltd.


01/28/16
20160026598 

Storage control devices and invoking method thereof


A storage control device comprises a storage control module and a memory module. The storage control module is coupled between a central processing unit and a plurality of hard disk drives.
Inventec Corporation


01/28/16
20160026544 

Using the short stroked portion of hard disk drives for a mirrored copy of solid state drives


Mechanisms for storing data to a storage system comprising a set of one or more solid state storage devices and a set of non-solid state storage devices are provided. A request to write data to the storage system is received and the data is written to the set of one or more solid state storage devices in response to receiving the request.
International Business Machines Corporation


01/21/16
20160019918 

Suspension assembly and disk drive with the same


According to one embodiment, a suspension assembly includes a base plate having a securing plate portion protruding outwardly from a side edge of the base plate, a load beam secured on a first surface of the base plate and extending from the base plate, and a wiring member. The wiring member includes a distal side portion attached to the load beam and the first surface of the base plate, and a proximal side portion extending outwardly from the side edge of the base plate and extending in a direction opposite to the load beam along the support surface..
Kabushiki Kaisha Toshiba


01/21/16
20160019080 

Allocating storage for virtual machine instances based on input/outupt (i/o) usage rage of the disk extents stored in an i/o profile of a previous incarnation of the virtual machine


A method, system and computer program product for allocating storage for virtual machine instances. The input/output (i/o) usage of disk extents utilized by a virtual machine is saved in an i/o profile of the virtual machine.
International Business Machines Corporation


01/21/16
20160018995 

Raid system for processing i/o requests utilizing xor commands


A controller for maintaining data consistency without utilizing region lock is disclosed. The controller is connected to multiple physical disk drives, and the physical disk drives include a data portion and a parity data portion that corresponds to the data portion.
Lsi Corporation


01/14/16
20160012843 

Systems and processes for efficiently storing and retrieving video content


Methods, systems and devices are described to improve the storage and retrieval of video content. The general concepts set forth herein could be used in any video storage system that uses disk drives to store video content, including remote or local storage digital video recorders (dvrs) and the like..
Echostar Technologies L.l.c.


01/14/16
20160012839 

Flexure of disk drive suspension


A tail pad portion is provided in a flexure tail including a metal base and a conductive circuit portion. Tail terminals are arranged in the tail pad portion.
Nhk Spring Co., Ltd.


01/14/16
20160012838 

Flexure of disk drive suspension


A tail pad portion is provided in a flexure tail including a metal base and a conductive circuit portion. Tail terminals are arranged in the tail pad portion.
Nhk Spring Co., Ltd.


01/14/16
20160012837 

Flexure of disk drive suspension


A tail pad portion is provided in a flexure tail including a metal base and a conductive circuit portion. Tail terminals are arranged in the tail pad portion.
Nhk Spring Co., Ltd.


01/14/16
20160012836 

Stepped assembly


A tolerance ring can be disposed between an inner component and an outer component, the inner and outer components defining stepped sidewalls. In an embodiment, a preassembly can include an outer component defining a bore having a stepped inner sidewall, an inner component having a stepped outer sidewall, and a tolerance ring adapted to be disposed between the inner component and the bore.
Saint-gobain Performance Plastics Rencol Limited


01/14/16
20160012834 

Disk drive head suspension tail with stiffened edge alignment features


A head gimbal assembly for a disk drive includes a flexure tail terminal region having flexure bond pads in electrical communication with the head. Each of the flexure bond pads includes a widened region of a corresponding one of a plurality of electrical traces in a conductive layer, and a discontinuous bond pad backing island in a structural layer that overlaps the widened region.
Western Digital Technologies, Inc.


01/14/16
20160011796 

Access route switching method in disk array system


In order to eliminate i/o performance bottleneck of a path in a disk array system, one expander is composed of two internal expanders connected to each other, and when the path falls in a bottleneck, connection of two internal expanders in a designated expander is cut off, and the cut-off internal expanders are connected to a new path to change access route to the disk drive. A device management table managing individual disk drives and a routing table managing access routes of respective paths are updated according to the switching of the access route..
Hitachi, Ltd.


01/14/16
20160011784 

Reliability scheme using hybrid ssd/hdd replication with log structured management


In one embodiment, a method of managing data includes storing a first copy of data in a solid state memory using a controller of the solid state memory, and storing a second copy of the data in a hard disk drive memory using the controller. Write requests are served substantially simultaneously at both the solid state memory and the hard disk drive memory under control of the controller.
International Business Machines Corporation


01/07/16
20160004441 

Access control accessing data in storage and disk drive


An access control method includes: in response to a first access instruction that instructs accessing first data, reading the first data and second data from a storage and deleting the first data and the second data from the storage, the first data being read from a first storage area, the second data being read from a second storage area that is physically adjacent to the first storage area and is not an empty area; and in response to a second access instruction that instructs writing third data to the storage, writing the third data to a third storage area that is adjacent to a storage area located in a physically rearmost position among storage areas in which data has been stored in the storage.. .
Fujitsu Limited


12/31/15
20150380059 

Hanging carrier for hdd


A vibration isolating hard disk drive carrier for isolating the transfer of vibration from one hard disk drive to another comprising a carrier body and one or more isolation hangers is disclosed. The carrier has a first surface configured to couple to inherent features of a first external surface of a hard disk drive, and a second surface configured to couple to inherent features of a second external surface hard disk drive.
Hgst Netherlands B.v.


12/31/15
20150380045 

Disk drive with improved spin-up control


A disk drive is disclosed comprising a head actuated over a disk, and a spindle motor configured to rotate the disk. The disk drive further comprises control circuitry configured to measure a rotation speed of the spindle motor, generate a feed-forward control based on the measured rotation speed, and spin-up the spindle motor based on the feed-forward control..
Western Digital Technologies, Inc.


12/31/15
20150380038 

Magnetic data storage using induced strain of a magnetostrictive material


Acoustically assisted magnetic recording can be used in a hard disk drive or a solid state medium. In the described embodiments, otherwise unwriteable high-coercivity media are made amenable to recording by lowering their coercivity via strain induced by acoustic waves.
Oregon State University


12/31/15
20150380034 

Method and writing servo information on a recording medium


A servo system for writing servo information on a recording medium of a hard disk drive and for determining head position based on the servo information with a tracking accuracy, the servo system including a first magnetic head and a servo writer. The servo writer is configured to write the servo information on the recording medium by forming, using the first magnetic head, a first servo pattern comprising a servo burst pattern on a segment of a first track of a first layer of the recording medium; and by forming a second servo pattern comprising addressing information on a segment of a second track of a second layer of the recording medium.
Marvell International Ltd.


12/31/15
20150380025 

Substrates for thin-film magnetic heads, magnetic head sliders, and hard disk drive devices


An altic-based substrate suitable for a thin-film magnetic head is provided. The al2o3—tic based substrate for a thin-film magnetic head including an al2o3 phase and a tic phase, wherein a c-axis lattice constant of the al2o3 phase is 12.992 Å or more and 12.998 Å or less, and a lattice constant of the tic phase is 4.317 Å or more and 4.325 Å or less..
Hitachi Metals, Ltd.


12/31/15
20150380024 

Substrates for thin-film magnetic heads, magnetic head sliders, and hard disk drive devices


An altic-based substrate suitable for a thin-film magnetic head is provided. The al2o3-tic based substrate for a thin-film magnetic head including an al2o3 phase and a tic phase, wherein a c-axis lattice constant of the al2o3 phase is 12.985 Å or more and 12.992 Å or less, and a lattice constant of the tic phase is 4.297 Å or more and 4.325 Å or less..
Hitachi Metals, Ltd.


12/31/15
20150380023 

Substrates for thin-film magnetic heads, magnetic head sliders, and hard disk drive devices


An altic-based substrate suitable for a thin-film magnetic head is provided. The al2o3—tic based substrate for a thin-film magnetic head including an al2o3 phase and a tic phase, wherein a c-axis lattice constant of the al2o3 phase is 12.992 Å or more and 12.998 Å or less, and a lattice constant of the tic phase is 4.297 Å or more and 4.315 Å or less..
Hitachi Metals, Ltd.




Disk Drive topics: Disk Drive, Hard Disk Drive, Piezoelectric, Optical Disk Drive, Die Assembly, Circuit Board, Form Factor, Fastening Device, Storage Device, A Fastening Device, Scheduling

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