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9042053 Thermally stabilized perpendicular magnetic recording medium  
A magnetic recording medium including a substrate, and at least one magnetic layer formed on the substrate. The magnetic layer is formed from an alloy containing Cobalt, and Platinum (Pt). The...
9036289 Magnetic storage medium comprised of magnetic nanoparticles contained within nanotubes  
A magnetic storage medium is formed of magnetic nanoparticles that are encapsulated within nanotubes (e.g., carbon nanotubes).
9013832 Perpendicular magnetic recording medium and magnetic storage apparatus  
A perpendicular magnetic recording medium includes a nonmagnetic substrate, an underlayer provided above the nonmagnetic substrate, and a perpendicular recording layer provided above the...
9005781 Magnetic recording medium for perpendicular magnetic recording  
A perpendicular recording medium having a perpendicular magnetic recording layer and a magnetically soft underlayer structure disposed beneath the recording layer. The soft underlayer structure...
9007878 Glass for magnetic recording medium substrate and usage thereof  
An aspect of the present invention relates to glass for a magnetic recording medium substrate, which includes essential components in the form of SiO2, Li2O, Na2O, and one or more alkaline earth...
9007880 Thermally assisted magnetic recording medium and magnetic recording and reproducing apparatus  
A thermally assisted magnetic recording medium (1) includes a substrate (101), an underlayer (3) that is formed above the substrate (101), and a magnetic layer (107) that is formed on the...
8995089 Magnetic recording medium and method for producing the same  
According to one embodiment, there is provided a magnetic recording medium which includes a base, a magnetic recording layer having convex-shaped magnetic layers, which is formed on the base, and...
8988828 Magnetic recording medium and magnetic storage apparatus  
A magnetic recording medium includes a substrate, a magnetic layer including an alloy having an L10 type crystal structure, and a plurality of underlayers arranged between the substrate and the...
8986859 Magnetic disk substrate, magnetic disk, and magnetic disk device  
It is an object to provide a magnetic disk substrate highly reliable to prevent the occurrence of crash failure even if a magnetic disk is rotated at high speed, and suitable for a hard disk that...
8982510 Perpendicular magnetic recording disk having a permeability gradient  
Perpendicular magnetic recording disks and methods of fabricating perpendicular magnetic recording disks are described. The perpendicular magnetic recording disk includes a soft magnetic...
8977816 Cache and disk management method, and a controller using the method  
A cache and disk management method is provided. In the cache and disk management method, a command to delete all valid data stored in a cache, or specific data corresponding to a part of the valid...
8962164 Perpendicular magnetic recording media with magnetic anisotropy gradient and local exchange coupling  
A perpendicular magnetic recording medium adapted for high recording density and high data recording rate comprises a non-magnetic substrate having at least one surface with a layer stack formed...
8958177 Magnetic recording medium and method of fabricating the same  
In one embodiment, there are provided: a substrate; a data area disposed on the substrate and having a plurality of first magnetic dots arrayed in lines in mutually different first, second, and...
8951652 Substrate for magnetic recording medium, magnetic recording medium, method of manufacturing magnetic recording medium, and method of inspecting surface  
A substrate for a magnetic recording medium having a disc shape with a central hole is provided in which the surface roughness of the principal surface of the substrate is 1 angstrom or less in...
8947987 Systems and methods for providing capping layers for heat assisted magnetic recording media  
Aspects of the present invention are directed to heat assisted magnetic recording (HAMR) media with a CoCrPtB based capping layer design that is capable of reducing switching field distribution...
8945364 Magnetic recording medium and method for producing the same  
A patterned magnetic recording medium, accessible by a magnetic recording head, including a plurality of tracks, a width direction of each track and that of the magnetic recording head being of a...
8941950 Underlayers for heat assisted magnetic recording (HAMR) media  
Various embodiments provide for a heat assisted magnetic recording (HAMR) media comprising: a magnetic recording layer; a barrier layer disposed under the magnetic recording layer; a first...
8929008 Systems and methods for testing magnetic media disks during manufacturing using sliders with temperature sensors  
Systems and methods for testing magnetic media disks during manufacturing using sliders with temperature sensors are provided. One such method involves scanning a surface of a selected disk of a...
8913335 Storage device with shingled data and unshingled cache regions  
Shingled magnetic recording (SMR) devices according to embodiments of the invention include unshingled cache regions that can be used for storage of data. The unshingled cache regions can be used...
8908309 System, method and apparatus for master pattern generation, including servo patterns, for ultra-high density discrete track media using E-beam and self-assembly of block copolymer microdomains  
A system, method, and apparatus for forming a high quality master pattern for patterned media, including features to support servo patterns, is disclosed. Block copolymer self-assembly is used to...
8908312 Dynamic fly height control that is insensitive to off-track motion  
A data storage device and method for enabling dynamic fly height control which is insensitive to off-track motions is described. In some embodiments, a hard disk drive acquires signal data from...
8902545 Magnetic recording medium and magnetic storage apparatus  
A magnetic recording medium may have a stacked structure including a first soft magnetic layer, an orientation control layer, a lower recording layer, an intermediate layer, and an upper recording...
8895165 Method of manufacturing a glass substrate for a magnetic disk, glass substrate for a magnetic disk, method of manufacturing a magnetic disk, and magnetic disk  
Provided is a method of manufacturing a magnetic disk glass substrate, wherein, in a main surface polishing process, main surface polishing is applied to one of main surfaces of a glass substrate...
8896951 Magnetic disk and magnetic recording/reproducing apparatus  
A magnetic disk according to an embodiment includes: a plurality of data regions each including a plurality of tracks, each of the tracks being arranged to extend in a circumferential direction; a...
8877360 Magnetic recording medium with a plurality of pinning portions in the magnetic layer  
According to one embodiment, a perpendicular magnetic recording medium includes a substrate, and a multilayered magnetic recording layer formed on the substrate by alternately stacking two or more...
8873179 Bit-patterned media magnetic recording disk with two sizes of dots and imprint template made with directed self-assembly (DSA) of block copolymers  
A bit-patterned media (BPM) magnetic recording disk has two sizes of dots of magnetic material. The large and small dots are formed together in a hexagonal-close-packed (HCP) pattern. In the data...
8867171 Medium, method of fabricating a medium, recording system and method of controlling a recording system  
A medium may be provided. The medium includes a servo layer, a data recording layer, and a heat sink layer disposed between the servo layer and the recording layer.
8861116 Track pitch variation measurement method using spiral DC pattern writing  
In one embodiment, a method includes spiral writing a DC pattern onto a magnetic disk medium using a writer of a magnetic head while moving the magnetic head in a direction about parallel to a...
8858809 Method of manufacturing magnetic recording medium  
A manufacturing method of a magnetic recording medium includes steps of forming a magnetic recording layer, a first mask layer, a second mask layer containing silicon as primary component, a strip...
8848307 Active media for heat assisted magnetic recording (HAMR)  
An apparatus includes a magnetic recording layer and a thermally active material adjacent to and/or embedded in the magnetic recording layer, wherein the thermally active material has a thermal...
8842392 Magnetic recording medium and magnetic recording apparatus  
According to one embodiment, a magnetic recording medium includes: a data area on which a plurality of first magnetic dots are arranged at predetermined positions to record information; a servo...
8830631 Features for write fringing reduction  
A recording media design having discrete track recording structure where the trenches between tracks are filled with a soft magnetic material is provided. The soft magnetic material provides a low...
8830630 Magnetic recording medium and magnetic storage apparatus  
A magnetic recording medium may include a stacked structure of orientation control, lower recording, intermediate, and upper recording layers. The lower recording layer has a coercivity higher...
8824248 Glass for magnetic recording medium substrate and usage thereof  
An aspect of the present invention relates to glass for a magnetic recording medium substrate, which includes essential components in the form of SiO2, Li2O, Na2O, and one or more alkaline earth...
8822047 Patterned magnetic recording disk with high bit-aspect-ratio and master mold for nanoimprinting the disk  
A method for making a master mold that is used in the nanoimprinting process to make patterned-media disks with patterned data islands uses guided self-assembly of a block copolymer into its...
8817422 Magnetic storage medium comprised of magnetic nanoparticles contained within nanotubes  
A magnetic storage medium is formed of magnetic nanoparticles that are encapsulated within nanotubes (e.g., carbon nanotubes).
8804285 Magnetic recording medium and magnetic storage apparatus  
A magnetic recording medium may include an orientation control layer, a lower recording layer, an intermediate layer, and an upper recording layer that are stacked. The lower recording layer may...
8795859 Magnetic recording medium  
A magnetic recording medium includes, in a main surface of a glass substrate on which a magnetic recording layer is formed, a plurality of annular first thermally-conductive regions having a...
8792201 Method of disc alignment using printed alignment marks  
Processes include aligning a disc with a template at a location so that the pattern from the template is transferred to the disc in a relative orientation. The relative orientation provides that...
8790799 Glass substrates and methods of annealing the same  
A method for forming a glass substrate comprises the steps of forming a glass blank with opposing substantially planar surfaces and at least one edge, coating the glass blank in silica-alumina...
8786971 Magnetic recording apparatus having variable-width tracks and method of testing same  
According to one embodiment, there is provided a magnetic recording apparatus including a head slider including read and write elements, and a magnetic recording medium including magnetically...
8785011 Glass for use as substrate for information recording medium, substrate for information recording medium and information recording medium, and their production methods  
According to one aspect of the present invention, provided is glass for use in substrate for information recording medium, which comprises, denoted as molar percentages, a total of 70 to 85...
8785009 Magnetic recording medium having space dots and recording dots alternatively formed in the recording track and method of making the same  
A magnetic recording medium includes a plurality of recording tracks magnetically continuous with respect to a recording direction and arranged intermittently in a track width direction, a...
8786985 System, method and apparatus for storage architecture for bit patterned media using both erase band and shingled magnetic recording  
Storage architecture for bit patterned media uses both erase band and shingled magnetic recording. A hard disk drive may comprise a disk having bit patterned media with a plurality of data tracks...
8787130 Systems and methods for providing heat assisted magnetic recording media configured to couple energy from a near field transducer  
Systems and methods for providing heat assisted magnetic recording (HAMR) media configured to couple energy from a near field transducer (NFT) are provided. One such method includes providing a...
8767350 Magnetic recording medium having recording regions and separating regions and methods of manufacturing the same  
In one embodiment, a method for forming a magnetic recording medium includes forming a protective layer above recording regions of a patterned magnetic recording layer and separating regions...
8760980 Protective overcoat layer of carbon and a selected transition metal  
Apparatus for recording data and method for making the same. In accordance with some embodiments, a magnetic recording layer is adapted to store data along perpendicular magnetic domains. A...
8748017 Magnetic recording medium  
According to one embodiment, a bit patterned medium includes a substrate, and a magnetic recording layer disposed above the substrate and including patterns of protrusions. Each of the protrusions...
8734967 Substrate for magnetic disk and magnetic disk  
The shape and number of surface defects are controlled so that the occurrence of failure is suppressed in an HDD device in which a magnetic head with a very small flying height, such as a DFH...
8736993 Failure-resistant multi-LUN hard disk drive  
Approaches are provided for a hard-disk drive (HDD) and techniques for using multiple LUNs per HDD where each LUN is mapped to a head/disk interface. In one example, a HDD generates multiple LUNs...