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US20090166184 Perpendicular magnetic medium with shields between tracks  
A track shield structure is disclosed that enables higher track density to be achieved in a patterned track medium without increasing adjacent track erasure and side reading. This is accomplished...
US20130034749 CYCLOPHOSPHAZENE COMPOUND, LUBRICANT COMPRISING SAME, AND MAGNETIC DISK  
A cyclophosphazene compound of the formula (I), and lubricants and magnetic disks using the compound wherein n is 2, 3 or 4, m is an integer of 1 to 12, R is C1-4 fluoroalkyl and Rf is...
US20150221330 PERPENDICULAR MAGNETIC RECORDING DISK WITH TEMPLATE LAYER FORMED OF A BLEND OF NANOPARTICLES  
A continuous-media perpendicular magnetic recording disk has a granular recording layer (RL) with controlled grain pitch distribution and controlled long range ordering of the grains. The disk...
US20140269231 RADIALLY DEPENDENT THERMAL HEAT RESISTOR LAYER  
The embodiments disclose a data storage device including a thickness gradient heat sink layer deposited over a heat sink layer deposited over a substrate, a thickness gradient non-magnetic thermal...
US20080020238 Magentic Disk and Glass Substrate for Magnetic Disk  
An anisotropic texture is formed on a principal surface in the circumferential direction of the principal surface. The circumferential roughness of the principal surface increases from an outer...
US20140127534 MEDIA HAVING GRAPHENE WEAR PROTECTION LAYERS  
An optical or magnetic storage medium is disclosed that includes a disc having layers of graphene on one or both sides of the disc to provide wear protection against scratches and mechanical abrasion.
US20120276417 LUBRICANT FOR MAGNETIC DISK AND MAGNETIC DISK  
A lubricant for a magnetic disk that is excellent in heat resistance and is suitably used in a magnetic disk to be mounted on a magnetic recording device of a thermally assisted magnetic recording...
US20080292907 PATTERNED PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH EXCHANGE COUPLED RECORDING LAYER STRUCTURE AND MAGNETIC RECORDING SYSTEM USING THE MEDIUM  
A patterned perpendicular magnetic recording medium has discrete magnetic islands, each of which has a recording layer (RL) structure that comprises two exchange-coupled ferromagnetic layers. The...
US20060105203 Head disc interface design  
A recording medium for heat assisted magnetic recording includes a magnetic disc having a data zone portion and a non-data zone portion. A liquid lubricant is disposed on the non-data zone...
US20060280974 Magnetic disk medium, reticle and magnetic recording and reproducing apparatus  
A magnetic disc medium according to an aspect of the present invention includes: a preamble part in a servo area of each of sectors obtained by dividing a surface of the medium in a circumference...
US20070251270 METHOD FOR PRODUCING GLASS SUBSTRATE FOR MAGNETIC DISK, AND MAGNETIC DISK  
A method for producing a glass substrate for a magnetic disk by polishing a circular glass plate, which comprises a step of polishing the principal plane of the circular glass plate by using a...
US20080074783 Magnetic circuit and method of applying magnetic field  
In a magnetic circuit for providing magnetic anisotropy in the in-plane radial direction of a soft magnetic under layer, magnets for perpendicular magnetization are respectively provide on the...
US20080138662 PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH MULTILAYER RECORDING STRUCTURE INCLUDING INTERGRANULAR EXCHANGE ENHANCEMENT LAYER  
A perpendicular magnetic recording medium has a multilayer recording layer (RL) structure that includes a ferromagnetic intergranular exchange enhancement layer for mediating intergranular...
US20090226766 STAMPER FOR TRANSFERRING PATTERN, METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM BY USING THE STAMPER, AND THE MAGNETIC RECORDING MEDIUM  
A pattern transfer stamper 1 according to the present invention transfers an uneven pattern to a deformable surface of a member which is a base for manufacturing a magnetic disc D including a data...
US20120127601 LUBRICANT COMPOUND FOR MAGNETIC DISK AND MAGNETIC DISK  
A lubricant compound for a magnetic disk is provided which can realize further reduction of the magnetic spacing and moreover, has high reliability under a lower floating amount of the magnetic...
US20060216552 Chemically strengthened glass, substrate for information recording medium and information recording medium  
A glass for use in chemical reinforcement for use in a substrate of an information recording medium, having a composition comprising, denoted as mol %: SiO247 to 70% Al2O31 to 10%(where the total...
US20100021773 HEAD MEDIA SPACING REDUCTION THROUGH DATA ZONE LUBE REMOVAL  
The present invention is a manufacturing method of improving the signal-to-medium noise ratio of a magnetic media disk through closer head-to-media spacing, and the resulting disk, by evenly...
US20150109703 MAGNETIC DISK SUBSTRATE, MAGNETIC DISK, AND MAGNETIC DISK DEVICE  
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 starts and stops by the...
US20120276416 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...
US20070111042 Alkali-depleted glass & glass-based substrates for magnetic & magneto-optical recording media  
A method of manufacturing a glass or glass-based non-magnetic substrate for a magnetic or magneto-optical (MO) data/information storage and retrieval medium comprises sequential steps of providing...
US20060042317 Method of producing a glass substrate for a magnetic disk, Method of producing a magnetic disk, and a cylindrical glass material for a glass substrate  
On producing a glass substrate for a magnetic disk, a side surface of a cylindrical glass material (3) is polished or mirror-finished before the cylindrical glass material is cut in a direction...
US20080014470 Method for fabricating a glass substrate, method for fabricating a magnetic disk, and magnetic disk  
A method for manufacturing a glass substrate which has a uniform and minute pattern of stripes formed on the surface thereof by ultraprecision polishing, and which allows the recording capacity of...
US20120077060 EVALUATION METHOD OF MAGNETIC DISK, MANUFACTURING METHOD OF MAGNETIC DISK, AND MAGNETIC DISK  
An evaluation method that can easily evaluate properties of a carbon protective film and a lubricant on a magnetic-disk surface or particularly, an evaluation method of a magnetic disk in which...
US20080085428 Silicon Substrate For Magnetic Recording Meduim, Method Of Manufacturing The Silicon Susbstrate And Magnetic Recording Medium  
In a silicon substrate for a magnetic recording medium, a curved surface having a radius from 0.01 mm to 0.05 mm is provided at an edge portion between a main surface and an end face of the...
US20090214897 MAGNETIC STORAGE APPARATUS  
A magnetic storage apparatus is provided with a perpendicular magnetic recording medium having a soft magnetic underlayer and a recording layer, and a magnetic head having a medium opposing...
US20110205663 METHOD OF PRODUCING MAGNETIC STORAGE MEDIUM, MAGNETIC STORAGE MEDIUM AND INFORMATION STORAGE DEVICE  
It is an object to produce a magnetic storage medium of a high recording density by a production method that does not impair mass productivity, and a magnetic storage medium 10 is produced by a...
US20060280975 Magnetic recording disk with patterned nondata islands of alternating polarity  
A magnetic recording disk has patterned nondata regions that are used for read/write head positioning and data synchronization. The nondata regions contain nondata islands of magnetizable material...
US20090029191 METHOD FOR MAKING A MASTER DISK FOR NANOIMPRINTING PATTERNED MAGNETIC RECORDING DISKS, MASTER DISK MADE BY THE METHOD, AND DISK IMPRINTED BY THE MASTER DISK  
A method for making a master disk to be used for nanoimprinting patterned-media magnetic recording disks uses sidewall lithography. In one implementation, the master disk substrate has a first...
US20060210837 Method of plating on a glass base plate, a method of manufacturing a disk substrate for a perpendicular magnetic recording medium, a disk substrate for a perpendicular magnetic recording medium, and a perpendicular magnetic recording medium  
A method of plating on a glass base plate is disclosed. The method allows a plating film to be formed on a base plate composed of a glass material with excellent adhesivity and homogeneity by...
US20070026265 Patterned substrate having patterns of protrusions and recesses, method of manufacturing the same, magnetic recording media, and magnetic recording apparatus  
According to one embodiment, a patterned substrate used for a magnetic recording media having discrete tracks includes patterns of protrusions and recesses processed thereon, and a texture...
US20060073362 Magnetic disk and manufacturing method thereof  
A magnetic disk comprises a magnetic layer and a protective layer sequentially formed on a disk-shaped substrate and has a principal surface to which data is recorded, and a side surface portion...
US20100081013 MAGNETIC DISK SUBSTRATE AND MAGNETIC DISK  
In a magnetic disk substrate being annular and having a first and a second main surface, (1) surface roughness measured by an atomic force microscope having a resolution of 256×256 pixels per 2 μm...
US20100233517 METHOD FOR MAKING A MASTER DISK FOR NANOIMPRINTING PATTERNED MAGNETIC RECORDING DISKS AND MASTER DISK MADE BY THE METHOD  
A method for making a master disk to be used for nanoimprinting patterned-media magnetic recording disks uses sidewall lithography. In one implementation, the master disk substrate has a first...
US20060222907 Magnetic recording medium having an atmospheric plasma modified substrate  
A magnetic recording medium having a polyester substrate with at least one magnetic recording layer coated thereon, wherein the substrate is a polyester film which has been modified by atmospheric...
US20090311558 MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD  
A magnetic recording medium that includes: a disc-shaped substrate; and plural magnetization retainers arranged on the disc-shaped substrate in plural circulations around a center of the...
US20060222908 Perpendicular magnetic disk apparatus  
According to one embodiment, there is provided a perpendicular magnetic disk apparatus including a perpendicular magnetic recording medium including a nonmagnetic substrate having a surface...
US20070072013 Magnetic recording medium and method for production thereof  
Embodiments of the invention provide ways to manufacture an inexpensive high-density magnetic recording medium. A high-density magnetic recording medium is composed of a flat substrate, a...
US20090297889 MASTER RECORDING MEDIUM FOR MAGNETICALLY TRANSFERRING SERVO PATTERN TO THE MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME  
Provided are a master recording medium and a method of manufacturing the master recording medium. The master recording medium includes: a plate; and a magnetic layer which is formed on the plate...
US20100273030 GLASS SUBSTRATE FOR A MAGNETIC DISK, MAGNETIC DISK AND METHOD OF MANUFACTURING A MAGNETIC DISK  
A glass substrate for a magnetic disk, wherein, in regions with respect to two places arbitrarily selected on a surface of the glass substrate on its central portion side relative to its outer...
US20060014053 Magnetic disk and magnetic disk device provided with the same  
A magnetic disk includes a flat disk-shaped substrate having a center hole and a recording region formed on an obverse and/or reverse surface of the substrate and patterned depending on the...
US20090148725 SUBSTRATE FOR PERPENDICULAR MAGNETIC RECORDING MEDIA AND PERPENDICULAR MAGNETIC RECORDING MEDIA USING SAME  
Substrates for perpendicular magnetic recording media, and perpendicular magnetic recording media using such substrates, are disclosed. By setting the substrate inclination angle, or a parameter...
US20110300410 Bit-Patterned Magnetic Media Formed in Filler Layer Recesses  
A recessed field is formed surrounding resist columns that are in a pattern of bit patterned magnetic media. A filler layer is formed in the recessed field. The resist columns are removed to leave...
US20080118781 Perpendicular Magnetic Recording Media, Production Process Thereof, and Perpendicular Magnetic Recording and Reproducing Apparatus  
Perpendicular magnetic recording media enabling high-density recording and reproduction of information, as well as a production process thereof, and a magnetic recording and reproducing apparatus,...
US20100247977 SUBASTRATE FOR A MAGNETIC DISK AND METHOD OF MANUFACTURING THE SAME  
In a magnetic disk substrate having first and second chamfered faces respectively connecting between first and second main surfaces opposite to each other and an edge face located between the...
US20100028721 LUBRICANT FOR MAGNETIC DISK, PROCESS FOR PRODUCING THE SAME, AND MAGNETIC DISK  
A lubricant for magnetic disks which can form a lubricating layer having a reduced thickness while attaining a high coverage and is excellent in heat resistance and adhesion to a protective layer....
US20080188165 Method for manufacturing disk-substrates for magnetic recording media, disk-substrates for magnetic recording media, method for manufacturing magnetic recording media, magnetic recording media, and magnetic recording device  
A method for manufacturing a magnetic recording medium disk substrate is provided for achieving a magnetic disk having a suitable surface roughness, a high in-plane magnetic anisotropy and a high...
US20090305082 MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING AND REPRODUCING DEVICE WITH MAGNETIC RECORDING MEDIUM, AND MAGNETIC-RECORDING-MEDIUM MANUFACTURING METHOD  
Although dots and servo patterns are made of the same magnetic material, the dots have a relatively low coercive force so as to allow data deletion and rewrite by a magnetic head, whilst the servo...
US20100247978 METHOD OF MANUFACTURING A SUBSTRATE FOR A MAGNETIC DISK  
A magnetic disk substrate manufacturing method of this invention includes a main surface polishing process that polishes disk-shaped glass substrates by the use of a polishing machine having a...
US20100227202 BIT-PATTERNED MEDIA WITH ANTIFERROMAGNETIC SHELL  
A method of producing bit-patterned media is provided whereby a shell structure is added on a bit-patterned media dot. The shell may be an antiferromagnetic material that will help stabilize the...
US20080075982 SUBSTRATE FOR MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURE OF SAME, AND MAGNETIC RECORDING MEDIUM  
A substrate for a magnetic recording medium is disclosed which enables formation of a magnetic recording medium for which both the electromagnetic transducing characteristics and the recording...

Matches 1 - 50 out of 89 1 2 >