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RECORD MEDIUM

Subclass of:

360 - Dynamic magnetic information storage or retrieval

Patent class list (only not empty are listed)

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Class / Patent application numberDescriptionNumber of patent applications / Date published
360135000 Disk 107
360132000 In container 39
360134000 Tape 23
Entries
DocumentTitleDate
20090009908MAGNETIC ROM INFORMATION CARRIER WITH ADDITIONAL STABILIZING LAYER - The invention relates to a read only magnetic information carrier (01-08-2009
20080291572MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME - According to one embodiment, a magnetic recording medium includes recording areas forming protrusions corresponding to servo signals and recording tracks and includes a crystalline magnetic layer, and non-recording areas comprising an amorphous damaged layer left in bottoms of recesses between the recording areas.11-27-2008
20100246063METHOD OF MANUFACTURING HEXAGONAL FERRITE MAGNETIC POWDER, MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - An aspect of the present invention relates to a method of manufacturing a hexagonal ferrite magnetic powder comprising preparing a melt by melting a starting material mixture comprising a hexagonal ferrite-forming component and a glass-forming component; rapidly cooling the melt to obtain an amorphous material comprising 0.3 to 2.0 weight percent of carbon atoms; heating the amorphous material to a temperature range of 580 to 700° C. and maintaining the amorphous material within the temperature range to precipitate hexagonal ferrite magnetic particles; and collecting the hexagonal ferrite magnetic particles precipitated.09-30-2010
20090147402PATTERNED MAGNETIC RECORDING MEDIUM AND METHOD OF SELF SERVO WRITING ONTO THE SAME - Provided are a patterned magnetic recording medium and a method of self servo writing in which servo information is written on the patterned magnetic recording medium. The patterned magnetic recording medium includes: a data sector including a plurality of magnetic recording regions spaced apart from one another, wherein the magnetic recording regions constitute a plurality of tracks which are each shaped like a ring; and a servo sector on which servo information regarding the tracks is capable of being written along the tracks, wherein only to a part of the tracks of the servo sector, servo information regarding the part of the tracks is written in the form of a physical servo pattern which is formed by physically patterning a magnetic recording layer.06-11-2009
20090002886METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM PRODUCED BY THE PRODUCTION METHOD, AND MOLD STRUCTURE FOR USE IN THE PRODUCTION METHOD - The present invention provides a method for producing a magnetic recording medium having servo areas and data areas using a mold structure. The method includes at least forming an imprint resist layer on a substrate surface of a magnetic recording medium, forming a convexo-concave pattern in the imprint resist layer by pressing convex portions of the mold structure against the imprint resist layer, and transferring magnetism to the servo areas in the magnetic recording medium by applying a magnetic field via the mold structure, wherein the imprint resist layer is formed only on areas of the substrate surface corresponding to the data areas in the magnetic recording medium, and the magnetic field is applied to areas of the substrate surface corresponding to the servo areas, with the areas of the substrate surface corresponding to the servo areas being in contact with convex portions of the mold structure.01-01-2009
20100134923MAGNETIC RANDOM ACCESS MEMORY WITH DUAL SPIN TORQUE REFERENCE LAYERS - A magnetic data storage cell, applicable to spin-torque random access memory (ST-RAM), is disclosed. A magnetic cell includes first and second fixed magnetic layers and a free magnetic layer positioned between the fixed magnetic layers. The magnetic cell also includes terminals configured for providing a spin-polarized current through the magnetic layers. The first fixed magnetic layer has a magnetization direction that is substantially parallel to the easy axis of the free magnetic layer, and the second fixed magnetic layer has a magnetization direction that is substantially orthogonal to the easy axis of the free magnetic layer. The dual fixed magnetic layers provide enhanced spin torque in writing to the free magnetic layer, thereby reducing the required current and reducing the feature size of magnetic data storage cells, and increasing the data storage density of magnetic spin torque data storage.06-03-2010
20090185312Information storage devices using magnetic domain wall movement - Information storage devices are provided. An information storage device includes a track including at least one Co alloy layer and a soft magnetic layer. The track further includes a plurality of magnetic domains. A current applying element is connected to the track. The track includes a plurality of layers stacked alternately.07-23-2009
20080316649METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM PRODUCED BY THE PRODUCTION METHOD, AND MOLD STRUCTURE FOR USE IN THE PRODUCTION METHOD - The present invention provides a method for producing a magnetic recording medium having servo areas and data areas using a mold structure having a plurality of convex portions, the method, including: forming an imprint resist layer on a surface of a substrate for the magnetic recording medium, forming a convexo-concave resist pattern in the formed imprint resist layer by pressing the plurality of convex portions of the mold structure against the imprint resist layer, and transferring magnetism to the servo areas in the magnetic recording medium by applying a magnetic field to the servo areas via the mold structure.12-25-2008
20090040657RECORDING DATA SIMULTANEOUSLY AT TWO DEPTHS OF A TILTED MAGNETIC MEDIUM - Methods and recording systems are configured for recording different data simultaneously at two different depths of a tilted magnetic medium, the tilted magnetic medium having a hard axis of magnetization, the axis being out of a plane of the medium and at an angle of −10 to −80 degrees with respect to a direction along which data are recorded, the medium being capable of having two depths of recording. A method embodies writing with selected magnetic fields whose amplitudes and whose angles with respect to the medium hard axis direction differ at the two depths of the medium such that the recorded direction of magnetization at the respective two depths can be set independently.02-12-2009
20100157478SYSTEM AND METHOD FOR STORAGE OF DIGITAL ASSETS - A storage apparatus is provided. A storage apparatus can include a storage device having one or more unique device identifiers disposed in, on, or about the storage apparatus. One or more computer readable and writeable data storage areas can be disposed in, on, or about the storage apparatus. One or more computer readable data storage areas can also be disposed in, on, or about the storage apparatus. One or more computer readable instruction sets can be disposed in, on, or about the storage apparatus. The execution of all or a portion of the one or more computer readable instruction sets can be contingent upon the successful authentication of all or a portion of the one or more device identifiers.06-24-2010
20090034122STRUCTURE AND PROCESS FOR PRODUCTION THEREOF - A structure has projecting structural members perpendicular to a substrate, the projecting structural members having respectively a curved top-end face covered continuously with a magnetic material. A process for producing a structure comprises the steps of placing an underlying metal layer and an anode-oxidization layer successively on a substrate, anodizing the anode-oxidization layer to form a porous film having pores perpendicular to the substrate, growing an oxide of a metal of the underlying metal layer from the bottoms of the pores of the porous film to outside of the porous film to form projecting structural members through the pores, each constituted of a columnar structural portion and a curve-faced top-end portion, removing a part or the entire of the porous film, and placing a magnetic material on the top-end portions of the projecting structural members.02-05-2009
20100053813METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - A method for manufacturing a magnetic recording medium (03-04-2010
20090015967PERPENDICULAR MAGNETIC RECORDING MEDIA AND PERPENDICULAR MAGNETIC RECORDING APPARATUS - A perpendicular magnetic recording media is disclosed which employs inexpensive materials in the intermediate layer of the high-recording density media while exhibiting magnetic characteristics comparable or superior to those of media using Ru or Re. A perpendicular magnetic recording apparatus employing this perpendicular magnetic recording media also is disclosed. The perpendicular magnetic recording media has a nonmagnetic substrate, a soft magnetic backing layer formed on the nonmagnetic substrate, a seed layer formed on the soft magnetic backing layer, an intermediate layer formed on the seed layer, a magnetic layer formed on the intermediate layer, and a protective layer formed on the magnetic layer. The intermediate layer comprises an alloy with the hcp structure containing 55 at % or more Zn, the magnetic layer comprises an alloy with the hcp structure containing Co, and the Aθ50 value of the orientation plane (0002) of the magnetic layer is between 1.5° and 4°.01-15-2009
20080218906MAGNETIC RECORDING MEDIA AND METHOD OF MANUFACTURE OF THE SAME - A magnetic recording medium is disclosed in which there is no degradation of magnetic characteristics at the time of manufacture, such as is seen in proposed discrete-track media or patterned media. The medium can be manufactured by a simple method and results in excellent productivity. Magnetic recording media have a substrate, and, provided thereon in order from the substrate side, are a soft magnetic layer, a crystal orientation control layer, and a magnetic recording layer. The area of at least a portion of the crystal orientation control layer is provided with a depressed portion. Portions of the magnetic layer formed on this depressed portion have a non-granular structure, whereas portions of the magnetic formed on the crystal orientation control layer outside the depressed portion have a granular structure. A method for manufacturing the magnetic recording media is disclosed having a soft magnetic layer formation process of forming a soft magnetic layer on a substrate; a crystal orientation layer formation process of providing a crystal orientation control layer on the soft magnetic layer; a depressed portion formation process of providing a depressed portion in the area of at least a portion of the crystal orientation control layer; and a process of forming a magnetic recording layer on the crystal orientation control layer on which the depressed portion is formed.09-11-2008
20110051286WRITING DATA ON ALTERNATING MAGNETIC AND NONMAGNETIC STRIPES OF A SERVO PATTERN - A recordable magnetic media includes a servo pattern having a plurality of adjacent alternating magnetic and nonmagnetic material stripes. At least some of the magnetic material stripes have magnetic transitions that define encoded data.03-03-2011
20100246062PATTERNED-MEDIA PERPENDICULAR MAGNETIC RECORDING DISK WITH SERVO REGIONS HAVING MAGNETIZED SERVO PILLARS AND OPPOSITELY-MAGNETIZED SERVO TRENCHES - A patterned perpendicular magnetic recording disk has a pre-patterned disk substrate with pillars and trenches arranged in data regions and servo regions. In the data regions, the height of the data pillars is equal to or greater than the spacing between the data pillars, while in the servo regions the height of the servo pillars is less than the spacing between the servo pillars. A magnetic recording material with perpendicular magnetic anisotropy is deposited over the entire disk substrate, which results in magnetic material on the tops of the data pillars and servo pillars and in the servo trenches. The material in the data trenches is either nonmagnetic or discontinuous. After the application of a high DC magnetic field in one perpendicular direction and a low DC magnetic field in the opposite direction, the resulting disk has patterned servo sectors with servo pillars all magnetized in the same perpendicular direction and servo trenches magnetized in the opposite perpendicular direction.09-30-2010
20100007989HIGH DENSITY GRANULAR PERPENDICULAR RECORDING MEDIA FOR MECHANICAL RELIABILITY AND CORROSION RESISTANCE - An embodiment of the invention relates to a perpendicular magnetic recording medium comprising (1) a substrate, (2) an interlayer comprising hexagonal columns and (3) a magnetic layer, wherein the magnetic layer is deposited applying a bias voltage to the substrate such that the magnetic layer comprises magnetic grains having substantially no sub-grains within the magnetic layer, and the magnetic layer has perpendicular magnetic anisotropy.01-14-2010
20110038082COMBINED CMP AND ETCH PLANARIZATION - A magnetic device having a magnetic feature, the magnetic feature including magnetic portions, a stop layer portion on each magnetic portion, and a region of non-magnetic material adjacent to the magnetic portions and the stop layer portions, where the stop layer portions define planar upper boundaries for the magnetic portions and an endpoint in planarization of the magnetic feature.02-17-2011

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