Class / Patent application number | Description | Number of patent applications / Date published |
428832000 | Single magnetic layer and single underlayer | 26 |
20080213630 | PERPENDICULAR MAGNETIC RECORDING MEDIUM HAVING A MULTI-LAYER INTERLAYER THAT INCLUDES BCC MATERIAL - Perpendicular magnetic recording media and methods of fabricating perpendicular magnetic recording media are described. The perpendicular magnetic recording medium of one embodiment includes a soft magnetic underlayer (SUL), an interlayer, and a perpendicular magnetic recording layer. The interlayer comprises a layer formed from a first material (e.g., NiWCr) having a face-centered-cubic (FCC) structure, a layer formed from a second material (e.g., Cr) having a body-centered-cubic (BCC) structure, and a layer formed from a third material (e.g., Ru) having a hexagonal-close-packed (HCP) structure. | 09-04-2008 |
20080241600 | MAGNETIC RECORDING MEDIUM AND PROCESS FOR PRODUCING THE SAME - The present invention provides a magnetic recording medium wherein a fine non-magnetic inorganic powder, the dispersibility of which is improved, is used to improve the surface smoothness of a lower non-magnetic layer, thereby giving an excellent surface smoothness of an upper magnetic layer and electromagnetic conversion property; and a production process thereof. A magnetic recording medium comprising at least a non-magnetic support, a lower non-magnetic layer on one surface of the non-magnetic support, and an upper magnetic layer on the lower non-magnetic layer, wherein the upper magnetic layer contains at least a ferromagnetic powder, and a binder resin material, and the lower non-magnetic layer contains at least carbon black, iron oxide, and a binder resin material, and the iron oxide has an average major axis length of 30 to 100 nm, and a specific surface area based on the BET method of 80 to 120 m | 10-02-2008 |
20090162703 | Glass Substrate for Information Recording Medium, and Method of Manufacturing Glass Substrate for Magnetic Recording Medium and Information Recording Medium - Not only chemical durability of a glass substrate for an information recording medium is improved, but also no deformation of the substrate and no alteration of substrate characteristics are to be made. A chemical treatment layer formed on the glass substrate surface is made thicker toward a large surface roughness portion of the glass substrate, prior to being subjected to a chemical treatment, from a small surface roughness portion of the glass substrate. Layer thickness D of the resulting chemical treatment layer preferably satisfies the following inequality (1) in view of acquisition of chemical durability. | 06-25-2009 |
20090208778 | Patterned magnetic recording medium and method for manufacturing same - A patterned magnetic recording medium includes a magnetic layer having a track-shape and/or dot-shape relief pattern which demarcates information recording regions; a first protective layer covering the magnetic layer; and a second protective layer formed on the first protective layer and including a tetrahedral carbon (ta-C) film. The first protective layer has excellent corrosion resistance and the second protective layer has excellent magnetic head sliding characteristics. A method for manufacturing the medium includes forming an etching pattern of photohardening etching resist on an underlayer or magnetic layer using an imprinting method and etching the underlayer or magnetic layer to form a relief pattern; forming the first protective layer on the relief pattern of the magnetic layer using plasma CVD; and forming the second protective layer including a tetrahedral carbon (ta-C) film, on at least respective top portions of the relief pattern, by a FCA method or by a FCVA method. | 08-20-2009 |
20090214896 | PERPENDICULAR RECORDING MAGNETIC MEDIA HAVING A GRANULAR MAGNETIC RECORDING LAYER AND AN AMORPHOUS SOFT UNDERLAYER - A perpendicular magnetic recording medium having a substrate, an amorphous soft underlayer of thickness 30 nm or greater, and a granular magnetic recording layer for perpendicular recording is disclosed. The granular magnetic recording layer includes a non-magnetic region between magnetic grains, wherein the non-magnetic region includes metal nitride or metal carbide and provides exchange decoupling between the magnetic grains. The perpendicular recording medium of this invention reduces DC noise and increases media signal-to-noise ratio; it reduces surface roughness, which in turn reduces the head-to-media spacing and the head-to-amorphous soft underlayer spacing. | 08-27-2009 |
20100081011 | MAGNETIC RECORDING MEDIUM - A magnetic recording medium includes, in the following order: a backcoat layer; a nonmagnetic support; a nonmagnetic layer containing a nonmagnetic powder and a binder; and a magnetic layer containing a ferromagnetic powder and a binder, wherein the backcoat layer contains particles having an average primary particle size D50 of from 0.05 to 1.0 μm and forming substantially no aggregates nor agglomerates in the backcoat layer. | 04-01-2010 |
20100159285 | Hybrid grain boundary additives in granular media - Magnetic layers are described that include the use of magnetic grains and non-magnetic grain boundaries with hybrid additives. Hybrid additives include the use of at least two different additives in the composition of the grain boundaries of a magnetic layer in magnetic recording media. The use of hybrid additives in the grain boundaries results in improved recording media. Methods for forming magnetic layers and magnetic recording media with the hybrid additive grain boundaries are also described. | 06-24-2010 |
20100167092 | BIAXIALLY ORIENTED POLYESTER FILM AND MAGNETIC RECORDING TAPE - A biaxially oriented polyester film which has a Young's modulus (YMD) in the film machine direction (YMD) of 6.5 GPa or more and a Young's modulus in the width direction (YTD) of 8.2 to 9.8 GPa and is used as a base film for magnetic recording tapes of linear recording system, and a magnetic recording tape of linear recording system comprising the same as a base film. | 07-01-2010 |
20100190036 | Systems and Methods for Surface Modification by Filtered Cathodic Vacuum Arc - Provided are filtered cathodic vacuum arc systems useful for modifying a surface of a substrate (e.g. depositing a thin film of a material onto a surface of a substrate and/or implanting a material into the near-surface region of a substrate). The systems are configured to stabilize a do arc discharge plasma from an arc source. Also provided are methods for modifying a surface of a substrate, which in some cases includes depositing a material onto a surface of a substrate, in some cases includes implanting a material into the near-surface region of a substrate, and in some cases includes both depositing a material onto a surface of a substrate and implanting a material into the near-surface region of a substrate using the subject cathodic arc systems. In addition, magnetic recording media produced by the subject systems and methods are provided. | 07-29-2010 |
20110045318 | Tracks including magnetic layer and magnetic memory devices comprising the same - A magnetic memory device includes a track in which different non-magnetic layers are respectively formed on upper and lower surfaces of a magnetic layer. One of the two non-magnetic layers includes an element having an atomic number greater than or equal to 12. Accordingly, the magnetic layer has a relatively high non-adiabaticity (β). | 02-24-2011 |
20110143167 | Tilted Recording Media with L10 Magnetic Layer - Magnetic recording media having a magnetic layer with an easy magnetization axis lying about 35° out of plane of the magnetic layer is disclosed. This media has a reduced total magnetic layer thickness and higher signal, while improving the media signal-to-noise ratio (SNR). | 06-16-2011 |
20110143168 | CO-FE ALLOY FOR SOFT MAGNETIC FILMS, SOFT MAGNETIC FILM, AND PERPENDICULAR MAGNETIC RECORDING MEDIUM - Disclosed is a Co—Fe alloy for soft magnetic films used in perpendicular magnetic recording media, etc., which maintains high soft magnetic properties and has excellent weather resistance. Disclosed is a Co—Fe alloy for soft magnetic films, which is a Co—Fe alloy the composition formula of which is expressed at atomic ratio as ((Co | 06-16-2011 |
20120045663 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM MANUFACTURED USING THE SAME - A method of manufacturing a magnetic recording medium with high recording density and enabling stable flight of a magnetic head, with high manufacturing yields, is provided. The method includes layering a magnetic layer, a protective layer, and a lubricating layer in order on a substrate, and forming a medium for transfer. The method further includes transferring a magnetic pattern to the medium for transfer, and flattening a surface of the lubricating layer of the medium for transfer for which the magnetic pattern transferring is completed. The surface of the lubricating layer is flattened either by wiping the surface of the lubricating layer using a member without a cutting effect, or by heating the surface of the lubricating layer. | 02-23-2012 |
20120141837 | TETRAGONAL MANGANESE GALLIUM FILMS - A magnetic recording medium for use in storing information is described, the medium comprising the use of a manganese-gallium alloy. More specifically, in one embodiment there is provided a magnetic recording medium comprising a substrate having a surface upon which is placed a magnetic recording layer, wherein the magnetic recording layer comprises a Manganese-Gallium alloy material with uniaxial anisotropy. | 06-07-2012 |
20120251847 | MAGNETIC STORAGE ELEMENT AND MAGNETIC STORAGE DEVICE - There are provided magnetic storage elements capable of performing a high-reliability write operation by inhibiting erroneous reversal of data of the magnetic storage element put in a semi-selected state, and a magnetic storage device using this. A recording layer having an easy axis and a hard axis overlaps at least one of a first or second conductive layer at the entire region thereof in plan view. First endpoints of a first line segment along the easy axis and maximum in dimension overlapping the recording layer in plan view don't overlap the second conductive layer in plan view. At least one of second endpoints of a pair of endpoints of a second line segment passing through the middle point of the first line segment, orthogonal to the first line segment in plan view, and overlapping the recording layer in plan view doesn't overlap the first conductive layer in plan view. | 10-04-2012 |
20140212692 | MAGNETIC RECORDING MEDIUM, MANUFACTURING METHOD, AND USE THEREOF - A magnetic recording medium, that makes it possible to reduce head flying height, includes a nonmagnetic substrate and provided thereon, in the order recited; an underlayer; a magnetic layer; a protective layer comprised of carbon; and a lubricating layer composed of a lubricant mixture including a lubricant represented by Formula (I) below | 07-31-2014 |
20140212693 | MAGNETIC RECORDING MEDIUM - The magnetic recording medium includes a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support, wherein the ferromagnetic powder is an ε-iron oxide powder, and the magnetic layer comprises a compound comprising at least one substituent selected from the group consisting of a hydroxyl group and a quaternary ammonium salt group. | 07-31-2014 |
20140363701 | PERPENDICULAR MAGNETIZATION WITH OXIDE INTERFACE - A mechanism is provided for a structure with perpendicular magnetic anisotropy. A bottom oxide layer is disposed, and a magnetic layer is disposed adjacent to the bottom oxide layer. The magnetic layer includes iron and is magnetized perpendicularly to a plane of the magnetic layer. A top oxide layer is disposed adjacent to the magnetic layer. | 12-11-2014 |
20150064500 | COMPOSITION FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a composition, which is a composition for a magnetic recording medium and comprises an isocyanate compound in the form of an adduct of a polyhydroxyl compound having one or more aromatic carbon rings and three or more hydroxyl groups per molecule with a polyisocyanate having two or more isocyanate groups per molecule. | 03-05-2015 |
428832100 | Co or Co-base magnetic layer | 5 |
20080226950 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE MEDIUM - A perpendicular magnetic recording medium is disclosed in which a soft magnetic layer used as a low K | 09-18-2008 |
20100021769 | METHOD TO IMPROVE CORROSION PERFORMANCE OF EXCHANGE COUPLED GRANULAR PERPENDICULAR MEDIA - The invention relates to a granular perpendicular magnetic recording medium comprising a top magnetic layer on a granular layer wherein the magnetic layer comprises a continuous Co alloy film that results in the recording medium having less than 10% CoOx on the surface of the protective overcoat when the recording medium is exposed to 80% relative humidity at 80° C. for 4 days. | 01-28-2010 |
20120156523 | Perpendicular Magnetic Recording Medium And Method Of Manufacturing Same | 06-21-2012 |
20130108890 | Target, An Underlayer Material For Co-Based Or Fe-Based Magnetic Recording Media, And Magnetic Recording Media | 05-02-2013 |
20140030553 | MAGNETO-ELECTRONIC COMPONENT, AND METHOD FOR THE PRODUCTION THEREOF - The invention relates to the fields of physics and materials science, more particularly to a magneto-electronic component that can he used as a digital memory, for example. The aim of the invention is to design a magneto-electronic component which can be used as a racetrack memory. Said aim is achieved by a magneto-electronic component consisting of an insulating thin film, on which an elongate element made of a magnetic material and electrically conductive contacts are located, and another insulating thin film, said arrangement being jointly rolled up. Said aim is also achieved by a method in which at least one elongate element made of a magnetic material is applied to an insulating thin film, electrical contacts are also applied, and another insulating thin film is applied thereto, the stack of layers being arranged so as to have a strain gradient. | 01-30-2014 |
428832300 | Ni or Ni-base underlayer | 1 |
20100021770 | NICKEL BASED ALLOYS AS CRYSTAL GROWTH ENHANCING AND MECHANICAL STRENGTHENING LAYER FOR PERPENDICULAR RECORDING MEDIA - The invention relates to a perpendicular magnetic recording medium having a substrate and a seed layer comprising a Ni alloy. | 01-28-2010 |
428832400 | Polymeric underlayer (e.g., polymeric adhesion layer, plasma polymerized carbon, etc.) | 1 |
20140087211 | MAGNETIC RECORDING MEDIUM COATING COMPOSITION AND MAGNETIC RECORDING MEDIUM - The magnetic recording medium coating composition includes carbon black; iron oxide; at least one organic solvent selected from the group consisting of methyl ethyl ketone, cyclohexanone, and isophorone; an organic tertiary amine selected from the group consisting of an aliphatic tertiary monoamine and an alicyclic tertiary amine; and an organic acid. | 03-27-2014 |