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Magnetic recording media substrate

Subclass of:

428 - Stock material or miscellaneous articles

428800000 - MAGNETIC RECORDING COMPONENT OR STOCK

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
428846100 Inorganic substrate 91
428848000 Circular shape (e.g., disk, etc.) 25
428847000 Organic polymer substrate 10
Entries
DocumentTitleDate
20100151276MAGNETIC STORAGE DEVICE - A magnetic storage device stable in write characteristic is provided. A first nonmagnetic film is provided over a recording layer. A first ferromagnetic film is provided over the first nonmagnetic film and has a first magnetization and a first film thickness. A second nonmagnetic film is provided over the first ferromagnetic film. A second ferromagnetic film is provided over the second nonmagnetic film, is coupled in antiparallel with the first ferromagnetic film, and has a second magnetization and a second film thickness. An antiferromagnetic film is provided over the second ferromagnetic film. The sum of the product of the first magnetization and the first film thickness and the product of the second magnetization and the second film thickness is smaller than the product of the magnetization of the recording layer and the film thickness of the recording layer.06-17-2010
20100151277MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME AND MAGNETIC RECORDING APPARATUS - According to one embodiment, a magnetic recording medium includes two or more magnetic recording layers stacked on a nonmagnetic substrate, and a carbon-based protective layer formed on the two or more magnetic recording layers, in which an uppermost one of the two or more magnetic recording layers has hardness higher than that of a lower magnetic recording layer.06-17-2010
20100159286PERPENDICULAR MAGNETIC RECORDING MEDIUM - Disclosed is a perpendicular magnetic recording medium on a substrate. The perpendicular magnetic recording medium has a recording layer. The recording layer includes a first granular recording layer and a second granular recording layer. There may be an exchange layer between the first granular recording layer and the second granular recording layer. Additionally or alternatively, the ratio of saturation magnetization of the first granular recording layer and the second granular recording layer may be greater than 1 and/or the first granular recording layer may have a relatively high magnetic anisotropy compared to the second granular recording layer magnetic anisotropy. A forming method is also disclosed.06-24-2010
20110195277HIGH DENSITY MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD THEREOF - A high density magnetic recording medium including aggregates of magnetic nanoparticles arranged stably and efficiently in demarcated sections in the surface of a substrate is manufactured by the steps of forming a plurality of parallel tracks in the surface of the substrate, forming a plurality of minute recesses serially at approximately equal intervals in each of the tracks, casting a liquid dispersion of magnetic nanoparticles into the minute recesses, and evaporating dispersing medium from the liquid dispersion, thereby forming an aggregate of magnetic nanoparticles in each of the minute recesses.08-11-2011
20100119878MAGNETIC RECORDING MEDIUM - Provided is a magnetic recording medium which maintains high S/N ratio and coercive force (Hc) and has high recording density, even with fine magnetic particles, by further improving crystal orientation of a magnetic recording layer. The magnetic recording medium is provided with an orientation control layer (05-13-2010
20090136785Methods for nanopatterning and production of magnetic nanostructures - Methods for nanopatterning and methods for production of nanoparticles utilizing such nanopatterning are described herein. In exemplary embodiments, masking nanoparticles are disposed on various substrates and to form a nanopatterned mask. Using various etching and filling techniques, nanoparticles and nanocavities can be formed using the masking nanoparticles and methods described throughout.05-28-2009
20100015472PROTECTIVE COATING OF MAGNETIC NANOPARTICLES - Encapsulated particles and methods for manufacturing encapsulated particles and structures are described. Such particles may have a length no greater than 40 nm, and include at least one material selected from the group consisting of ferromagnetic materials and ferrimagnetic materials. A polymeric encapsulant surrounds the particle, the polymeric encapsulant including a phase-separated block copolymer including a glassy first phase and a rubbery second phase, the glassy first phase positioned between the particle and the second rubbery phase. The glassy first phase includes a hydrophobic copolymer having a glass transition temperature of at least 50° C. The rubbery second phase includes a polymer having at least one of (i) a glass transition temperature of no greater than 30° C., and (ii) a tan delta peak maximum of no greater than 30° C. Other embodiments are described and claimed.01-21-2010
20130040168MAGNETIC RECORDING MEDIUM - A magnetic recording medium is disclosed which has excellent corrosion resistance, even with a protective layer of thickness 2 nm or less. The magnetic recording medium includes, on a substrate, a magnetic layer and a carbon-based protective layer. The thickness of the carbon-based protective layer is 2 nm or less, and the contact angle of water on a surface of the carbon-based protective layer is 25° or greater and less than 60°.02-14-2013
20100092803Method for manufacturing a magneto-resistance effect element and magnetic recording and reproducing apparatus - A method for manufacturing a magneto-resistance effect element is provided. The magneto-resistance effect element includes a first magnetic layer including a ferromagnetic material, a second magnetic layer including a ferromagnetic material and a spacer layer provided between the first magnetic layer and the second magnetic layer, the spacer layer having an insulating layer and a conductive portion penetrating through the insulating layer. The method includes: forming a film to be a base material of the spacer layer; performing a first treatment using a gas including at least one of oxygen molecules, oxygen atoms, oxygen ions, oxygen plasma and oxygen radicals on the film; and performing a second treatment using a gas including at least one of hydrogen molecules, hydrogen atoms, hydrogen ions, hydrogen plasma, hydrogen radicals, deuterium molecules, deuterium atoms, deuterium ions, deuterium plasma and deuterium radicals on the film submitted to the first treatment.04-15-2010
20110014499UV NANOIMPRINT METHOD, RESIN REPLICA MOLD AND METHOD FOR PRODUCING THE SAME, MAGNETIC RECORDING MEDIUM AND METHOD FOR PRODUCING THE SAME, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - A UV nanoimprint method comprising performing compression molding by pressing a mold having a pattern formed on the surface thereof against a work prepared by forming a thin film composed of an ultraviolet-curable resin on a substrate, and irradiating with ultraviolet light, either concurrently with the compression molding or after the compression molding, thereby transferring the pattern to the thin film, wherein the ultraviolet light is irradiated using an ultraviolet light irradiation apparatus equipped with temperature rise suppression means, and a light source that does not continuously emit heat rays together with ultraviolet light is used as a light source of the ultraviolet light irradiation apparatus.01-20-2011
20110020670Chromium Nitride Film Layer - In a recording medium, a CrN film layer comprising a B1 phase crystal structure.01-27-2011
20090011283Hcp soft underlayer - A perpendicular magnetic recording medium of the embodiments of the invention comprises a substrate, a hcp soft underlayer (SUL), and a magnetic layer, wherein the hcp SUL is adapted to create a [0002] growth orientation in the magnetic layer and to enhance a magnetic head field during writing of data to the magnetic layer; further wherein the perpendicular magnetic recording medium does not contain an interlayer (IL) that is different from the hcp SUL and provides a [0002] growth orientation in the magnetic layer.01-08-2009
20120237797MAGNETIC RECORDING MEDIUM - A recording layer is formed on a substrate, and a high thermal conductor having a thermal conductivity higher than that of the recording layer is disposed inside a plurality of recording bit regions constituting the recording layer, respectively. Furthermore, the recording layer is formed with a separating portion which divides the recording layer into the plurality of recording bit regions. The separating layer is filled with a low thermal conductor having a thermal conductivity lower than that of the recording layer.09-20-2012
20110143170METHODS FOR SUBSTRATE SURFACE PLANARIZATION DURING MAGNETIC PATTERNING BY PLASMA IMMERSION ION IMPLANTATION - A method and apparatus for planarizing magnetically susceptible layers of substrates is provided. A patterned resist is formed on the magnetically susceptible layer, and the substrate is subjected to a plasma immersion ion implantation process to change a magnetic property of the magnetically susceptible layer according to the pattern of the resist material. The substrate is subjected to a plasma material removal process either before or after the implantation process to planarize the surface of the magnetically susceptible layer resulting from the implantation process. The plasma material removal process may be directional or non-directional.06-16-2011
20110143169PERPENDICULAR MAGNETIC RECORDING DISK WITH ORDERED NUCLEATION LAYER AND METHOD FOR MAKING THE DISK - A continuous-media perpendicular magnetic recording disk with an oxide-containing granular Co alloy recording layer (RL) having minimal grain size dispersion has an ordered nucleation layer (ONL) formed below RL. The ONL has ordered nucleation sites arranged in a generally repetitive pattern. The nucleation sites are generally surrounded by non-nucleation regions of a different material than the nucleation sites. The Co-alloy grains of the subsequently deposited RL grow on the nucleation sites and the oxide of the RL become generally segregated on the non-nucleation regions. The ordered nucleation sites may be formed of a Ru-containing material and the non-nucleation regions may be formed of an oxide. The ONL is formed by nanoimprint lithography, preferably by a master mold fabricated with a method using self-assembling block copolymers for creating periodic nanometer scale features.06-16-2011
20100035088MAGNETIC TAPE AND METHOD FOR PRODUCING THE SAME - A magnetic tape produced by cutting a magnetic sheet with a wide breadth into a tape having a predetermined width using a cutting device, in which the magnetic sheet has a magnetic layer containing magnetic powder and a binder formed on one surface of a non-magnetic substrate having a thickness of 4 μm or less, and a center line average height (Ra) along a roughness curve of a cut edge of the magnetic tape is from 0.08 to 0.25 μm.02-11-2010
20090162704METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming protruded magnetic patterns on a substrate, depositing a nonmagnetic material in recesses between the magnetic patterns and on the magnetic patterns, and etching back the nonmagnetic material using an oxygen-containing etching gas while reforming a surface of the nonmagnetic material.06-25-2009
20090136784MAGNETIC RECORDING DISK AND METHOD FOR MANUFACTURE THEREOF - In a magnetic recording disk 05-28-2009
20090110962SYSTEM, METHOD AND APPARATUS FOR ELIMINATING ADHESION LAYERS BETWEEN SUBSTRATES AND SOFT UNDERLAYERS IN PERPENDICULAR MEDIA - A perpendicular media is formed without an adhesion layer between the substrate and soft underlayer (SUL) to reduce the cost of fabrication. The thickness of the SUL is reduced to less than 50 nm to increase the film adhesion strength between the substrate and SUL. The perpendicular media comprises only a substrate, the SUL, an exchange break layer, a recording layer, and a protective overcoat.04-30-2009
20090220822FERROELECTRIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - Provided are a ferroelectric recording medium and a method of manufacturing a ferroelectric recording medium. The method includes forming an electrode layer of a conductive material on a substrate, forming an intermediate layer of a dielectric material on the electrode layer, forming a source material layer on the intermediate layer, and forming a ferroelectric layer from the source material layer by performing an annealing process.09-03-2009
20090252992MAGNETIC RECORDING MEDIUM AND METHOD OF FABRICATING THE SAME - A magnetic recording medium has a recording layer, a protection layer and a lubricant layer that are stacked above a substrate. The lubricant layer includes a bond layer in contact with the protection layer, and a mobile layer at a surface of the magnetic recording medium and having a bonding strength weaker than that of the bond layer with respect to the protection layer. A height of convex portions at a surface portion of the mobile layer is approximately 0.3 nm or less.10-08-2009
20090274933PERPENDICULAR MAGNETIC RECORDING MEDIUM - Provided is a perpendicular magnetic recording medium. The perpendicular magnetic recording medium includes: a substrate; a soft magnetic layer disposed on the substrate; a recording layer disposed on the soft magnetic layer; and at least one hardness enhancing layer disposed in the soft magnetic layer or interposed between the soft magnetic layer and the recording layer.11-05-2009
20100215990PATTERNED MEDIUM AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a method of manufacturing a patterned medium includes depositing a magnetic recording layer and applying an ultraviolet curable resin on both surfaces of a medium substrate, pressing a first resin stamper and a second resin stamper each including patterns of recesses and protrusions, corresponding to a patterned medium, against both surfaces of the medium substrate in such a manner that a direction from a center of the medium substrate toward a center of the first resin stamper is off-oriented from a direction from the center of the medium substrate toward a center of the second resin stamper to imprint the patterns of recesses and protrusions on the ultraviolet curable resin, and irradiating the ultraviolet curable resin with an ultraviolet ray through each of the first and second resin stampers to cure the ultraviolet curable resin.08-26-2010
20100143752MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING A MAGNETIC RECORDING MEDIUM - [PROBLEMS] To appropriately form a DTR medium, a patterned medium, or the like in a manner less likely to cause the problems of prolonged process time and increased cost.06-10-2010
20100221582MAGNETIC RECORDING MEDIUM SUBSTRATE AND MAGNETIC RECORDING MEDIUM - Provided is a magnetic recording medium substrate appropriate for a discrete medium and capable of fabricating a magnetic recording medium to/from which data can be written or read stably. Coaxial grooves (09-02-2010
20100129686Magnetic recording medium for thermally assisted recording - A magnetic recording medium suppresses an anticipated decline in performance due to heating of the lubricant layer and protective layer in thermally assisted recording, and has superior durability and reliability. The magnetic recording medium comprises a layer stack comprising, in order on a nonmagnetic substrate, at least a magnetic recording layer, adiabatic layer, carbon-based protective layer, and lubricant layer.05-27-2010
20110070464RECORDING MEDIUM AND SHEET - A recording medium includes a magnetic material and a pulp-fiber, a minimum value of shortest distances between the magnetic material and an edge of the recording medium substantially parallel to the pulp-fiber orientation direction being about 1 mm or more.03-24-2011
20110177361Substrate Manufacturing Method, Substrate Manufactured by the Substrate Manufacturing Method and Magnetic Recording Medium Using the Substrate - Disclosed is a method for manufacturing a substrate provided with a surface portion having a plurality of concave and convex configurations. The method includes a step of applying a solution between a mold having a configuration corresponding to the concave and convex configurations, and a substrate base member, the solution obtained by dissolving a constructional material for composing the surface portion in a solvent; a step of forming the surface portion by drying the solvent in a state that the solution is applied between the mold and the substrate base member; and a step of releasing the mold from the surface portion. The mold satisfies requirements that a contact angle of a contact portion of the mold to be contacted with the solution is smaller than 90° with respect to the solvent, and that a work of adhesion between the contact portion and the constructional material is smaller than a work of adhesion between the contact portion and the solvent.07-21-2011
20100221583HDD PATTERN IMPLANT SYSTEM - Methods and apparatus for forming substrates having magnetically patterned surfaces is provided. A magnetic layer comprising one or more materials having magnetic properties is formed on a substrate. The magnetic layer is subjected to a patterning process in which selected portions of the surface of the magnetic layer are altered such that the altered portions have different magnetic properties from the non-altered portions without changing the topography of the substrate. A protective layer and a lubricant layer are deposited over the patterned magnetic layer. The patterning is accomplished through a number of processes that expose substrates to energy of varying forms. Apparatus and methods disclosed herein enable processing of two major surfaces of a substrate simultaneously, or sequentially by flipping. In some embodiments, magnetic properties of the substrate surface may be uniformly altered by plasma exposure and then selectively restored by exposure to patterned energy.09-02-2010
20090202867PROCESS FOR PRODUCING MAGNETIC METAL PARTICLES FOR MAGNETIC RECORDING, AND MAGNETIC RECORDING MEDIUM - The present invention relates to a process for producing magnetic metal particles for magnetic recording, comprising: 08-13-2009
20110151281MAGNETIC RECORDING MEDIA - A magnetic recording medium which has a non-magnetic substrate and a magnetic layer formed on the non-magnetic substrate, in which the magnetic layer contains magnetic powder with a particle size of 40 nm or less and a binder, an autocovariance length Ma of the magnetic layer in its lengthwise direction is 70 nm or less, an autocovariance length Mb of the magnetic layer in its widthwise direction is 80 nm or less, and a ratio Ma/Mb is from 0.80 to 1.20.06-23-2011
20120308847METHOD FOR FABRICATING HIGH CONTRAST STACKS - The embodiments disclose a method for fabricating high contrast stacks, including depositing materials on a substrate to form an antiferromagnetic coupling thin film layer on top of a first half of the magnetic layer of a stack, depositing a portion of a second half of the magnetic layer on top of the antiferromagnetic coupling thin film layer to couple the first and second half of the magnetic layers to the antiferromagnetic coupling thin film layer and bit-patterning a portion of the second half of the magnetic layer and the antiferromagnetic coupling thin film layer.12-06-2012
20100247974Substrate for magnetic recording medium, magnetic recording medium, and magnetic recording apparatus - It is possible to improve the recording and reproducing S/N ratio, the reproduction signal intensity, and the degree of high density recording. There are provided a plurality of recording tracks formed on a substrate, each recording track being formed of a magnetic material, and non-recording sections formed on the substrate, each non-recording section separating adjacent recording tracks, each recording track including a plurality of recording sections and connecting sections for connecting the recording sections adjacent thereto in a track longitudinal direction, and each connecting section having a cross-sectional area in a track width direction that is smaller than a cross-sectional area in a track width direction of adjacent recording sections.09-30-2010
20100291412MAGNETIC STORAGE MEDIUM FORMED OF CARBON NANOTUBE ARRAYS - A magnetic storage medium is formed of magnetic nanoparticles that are encapsulated within carbon nanotubes, which are arranged in a substrate to facilitate the reading and writing of information by a read/write head. The substrate may be flexible or rigid. Information is stored on the magnetic nanoparticles via the read/write head of a storage device. These magnetic nanoparticles are arranged into data tracks to store information through encapsulation within the carbon nanotubes. As carbon nanotubes are bendable, the carbon nanotubes may be arranged on flexible or rigid substrates, such as a polymer tape or disk for flexible media, or a glass substrate for rigid disk. A polymer may assist holding the nano-particle filled carbon-tubes to the substrate.11-18-2010
20100233515PERPENDICULAR MAGNETIC RECORDING MEDIUM - A perpendicular type of magnetic recording medium has a multi-layered recording structure made up of a plurality of ferro-magnetic layers and a non-magnetic layer interposed between the plurality of ferro-magnetic layers, and the perpendicular magnetic anisotropy energy of the lower ferro-magnetic layer is greater than the perpendicular magnetic anisotropy energy of the upper ferro-magnetic layer. Accordingly, the lower ferro-magnetic layer may be easily magnetically reversed by a magnetic field applied during a write operation. Thus, the perpendicular type of magnetic recording medium exhibits an enhanced thermal stability and write-ability.09-16-2010
20100203358Magnetic Recording Medium Substrate and Perpendicular Magnetic Recording Medium - A perpendicular magnetic recording medium comprising a pair of soft magnetic layers that are laminated via a non-magnetic layer and antiparallel-coupled to each other and that are provided between a non-magnetic substrate and a magnetic recording layer, wherein spike noise and medium noise can be positively suppressed when information recording and reproduction are carried out at high recording surface density. At least one pair of soft magnetic layers are laid and formed via a non-magnetic layer on a substrate of a non-magnetic material so that magnetic characteristics obtained by integrating the pair of soft magnetic layers have a magnetic hysteresis to thereby prevent the formation of a magnetic domain wall.08-12-2010
20090220823FERROMAGNETIC METAL PARTICLES AND PROCESS FOR PRODUCING THE SAME, AND MAGNETIC RECORDING MEDIUM - The present invention relates to ferromagnetic metal particles having a bulk density (ρa) of not more than 0.25 g/cm09-03-2009

Patent applications in class Magnetic recording media substrate

Patent applications in all subclasses Magnetic recording media substrate