| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 428834000 | Single magnetic layer with single specified overcoat layer | 22 |
| 20080206602 | Nanoimprinting of topography for patterned magnetic media - One embodiment in accordance with the invention is a method comprising depositing a material above a disk substrate. The disk substrate is for a data storage device. The material above the disk substrate can be nanoimprinted. The material can be processed to transform it into a substantially solidified material. A magnetic material can be deposited on the substantially solidified material. | 08-28-2008 |
| 20130216864 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - According to at least one embodiment, a release layer, a first mask layer containing a first metal material, an antidiffusion layer containing an oxide or nitride of the first metal material, and a second mask layer containing a second metal material are formed on a magnetic recording layer, a resist layer is formed on the second mask layer, and projections pattern is formed in the resist layer and sequentially transferred to the second mask layer, antidiffusion layer, first mask layer, release layer, and magnetic recording layer. After that, the release layer is removed. | 08-22-2013 |
| 20130216865 | MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD OF THE SAME - A magnetic recording medium enabling excellent magnetic recording reproduction characteristics to be exhibited with the spacing loss reduced. The magnetic recording medium has a magnetic recording layer of a granular structure having nonmagnetic boundary portions between pillar-shaped magnetic particles on a nonmagnetic substrate, and an exchange coupling layer provided on the magnetic recording layer to add an action of exchange coupling the magnetic particles. Ion irradiation on the entire surface of the exchange coupling layer after layering the exchange coupling layer on the magnetic recording layer is performed | 08-22-2013 |
| 20140057134 | MAGNETIC RECORDING MEDIUM FOR THERMALLY ASSISTED RECORDING - A magnetic recording medium is capable of improving the efficiency of thermal energy supply to a magnetic recording layer. A magnetic recording medium for thermally assisted recording comprises at least a nonmagnetic substrate, a magnetic recording layer, and a reflectance change layer. The magnetic recording layer is positioned between the substrate and the reflectance change layer. | 02-27-2014 |
| 20140147700 | RESIST FORTIFICATION FOR MAGNETIC MEDIA PATTERNING - A method and apparatus for forming magnetic media substrates is provided. A patterned resist layer is formed on a substrate having a magnetically susceptible layer. A conformal protective layer is formed over the patterned resist layer to prevent degradation of the pattern during subsequent processing. The substrate is subjected to an energy treatment wherein energetic species penetrate portions of the patterned resist and conformal protective layer according to the pattern formed in the patterned resist, impacting the magnetically susceptible layer and modifying a magnetic property thereof. The patterned resist and conformal protective layers are then removed, leaving a magnetic substrate having a pattern of magnetic properties with a topography that is substantially unchanged. | 05-29-2014 |
| 20150118521 | Method of Fabricating Graded Media - A magnetic data storage medium includes an ion doped magnetic recording layer having a continuous grading of coercivity or anisotropy. The medium also includes an ion-doped overcoat having an ion density that is at a maximum substantially at the interface with the recording layer and has a continuous grading of ion density between the overcoat and the recording layer. The coercivity is at a minimum substantially at the interface. | 04-30-2015 |
| 428835000 | Carbon overcoat (e.g., graphite, diamond like, doped carbon, etc.) | 12 |
| 20080305366 | Magnetic recording tape configured for improved surface lubricity - A magnetic recording tape configured for increased surface lubricity includes an elongated substrate and a magnetic side disposed on the substrate. The magnetic side includes a magnetic recording layer defining an exposed magnetic recording surface opposite the substrate, and a support layer deposited on the substrate between the substrate and the magnetic recording layer. The support layer includes nano-particles configured to release lubrication to the exposed magnetic recording surface. In this regard, the support layer configures the exposed magnetic recording surface to have a surface lubrication to total lubrication ratio (SL ratio) of greater than about 5%. | 12-11-2008 |
| 20090155630 | Alloy nanoparticles, method of producing the same, and magnetic recording medium using alloy nanoparticles - A method of producing alloy nanoparticles includes the steps of: adding a metallic salt, a reducing agent, a stabilizing ligand, and an organic iron complex to an organic solvent selected from the group consisting of 2-20C hydrocarbon, alcohol, ether, and ester in an inert gas atmosphere to obtain a reaction liquid; and stirring the reaction liquid while heating the reaction liquid to a predetermined temperature. The grain diameter of the alloy nanoparticle is controlled by regulating the amount of the stabilizing ligand. | 06-18-2009 |
| 20130244059 | Carbon-Deuterium Protective Overcoat Layer - A substrate having a carbon-deuterium protective overcoat layer, and method for making the same. In some embodiments, the substrate includes a recording structure having a magnetic recording layer. A protective overcoat layer is Formed on the recording structure, the protective overcoat layer composed of carbon-carbon (C—C) and carbon-deuterium (C—D) bonds and having no carbon-hydrogen (C—H) bonds. | 09-19-2013 |
| 20140248513 | MAGNETIC RECORDING MEDIUM, METHOD FOR PRODUCING THE SAME, AND METHOD FOR PRODUCING STAMPER - According to one embodiment, there is provided a method for producing a magnetic recording medium which includes forming a mask layer on a magnetic recording layer, applying metal fine particles on the mask layer, covering the metal fine particles with an overcoat layer, irradiating with energy beams through the overcoat layer so as to deactivate a protective coating of the metal fine particles, transferring a metal fine particle pattern from the mask layer to the magnetic recording layer, and removing the mask layer from the magnetic recording layer. | 09-04-2014 |
| 20140370331 | METHOD OF FABRICATING ION IMPLANTATION MAGNETICALLY AND THERMALLY ISOLATED BITS IN HAMR BPM STACKS - The embodiments disclose a continuous thin film magnetic layer and a patterned hard mask layer configured to be deposited onto the continuous thin film magnetic layer and to have plural ion implantations, wherein the ion implantations are configured to create chemically and structurally altered localized magnetic regions unprotected by the patterned hard mask layer. | 12-18-2014 |
| 20150302877 | PLASMA POLISH FOR MAGNETIC RECORDING MEDIA - Embodiments described herein provide improvements in magnetic recording media by utilizing Xenon plasma to polish a cap layer prior to depositing a carbon overcoat onto the cap layer. One embodiment comprises a method of operating a carbon overcoat deposition station. The method comprises inserting a magnetic recording disk into the deposition station that includes a cap layer that is exchange coupled to a magnetic recording layer. The method further comprises supplying a source of Xenon gas to the deposition station, and applying a negative bias voltage to the cap layer. The method further comprises ionizing the Xenon gas in the deposition station to generate Xenon plasma, and to polish the cap layer utilizing the Xenon plasma to a roughness of 5 angstroms or less. | 10-22-2015 |
| 428835100 | Sputter-formed carbon overcoat | 3 |
| 20130034747 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING SAME - A method for manufacturing a perpendicular magnetic recording medium can suppress the increase in head spacing and decrease in magnetic anisotropy of a magnetic layer. The method includes forming the magnetic recording layer and a protective layer precursor. The magnetic recording layer includes crystal grains of an ordered alloy and a grain boundary layer constituted by carbon and is formed on the non-magnetic substrate by a sputtering method using a target including metals constituting the ordered alloy and carbon. The protective layer precursor is constituted by carbon and is present on the magnetic recording layer. The method further includes irradiating the protective layer precursor with hydrocarbon ions generated by plasma discharge in a hydrocarbon gas and changing the protective layer precursor into the protective layer. The hydrocarbon ions have energy equal to or higher than 300 eV when the hydrocarbon ions reach the protective layer precursor. | 02-07-2013 |
| 20140147701 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A magnetic recording medium is manufactured by forming a magnetic recording layer on a substrate, forming a protective layer on the magnetic recording layer, executing a sputtering process using a target containing a first ingredient and a second ingredient to form on the protective layer a grain-state mask layer that includes grains formed of the first ingredient and grain boundaries between the grains formed of the second ingredient, etching the grain boundaries so that a projection pattern of the grains is formed, and transferring the projection pattern of the grains to the magnetic recording layer. | 05-29-2014 |
| 20150044510 | METHOD AND MATERIAL FOR PROTECTING MAGNETIC INFORMATION STORAGE MEDIA - A method of protecting a magnetic information storage medium is described. The method includes fabricating a film over a surface of the magnetic information storage medium. The film includes an amorphous, uniform, homogeneous solid solution of carbon, hydrogen, silicon, and oxygen. A magnetic storage medium with such a protective film is described. | 02-12-2015 |
| 428835200 | Plasma-formed carbon overcoat | 2 |
| 20110256426 | VACUUM ARC EVAPORATION APPARATUS AND METHOD, AND MAGNETIC RECORDING MEDIUM FORMED THEREBY - In a vacuum arc evaporation apparatus, to stably maintain vacuum arc discharge at an arc source when depositing a cathode material on a substrate, namely a magnetic recording medium, an ungrounded anode of a coil-type tube is placed inside an arc source discharge vacuum chamber. A DC arc power supply is connected between the cathode and the anode to cause an arc current to flow in the anode to generate a first magnetic field in one direction, from the cathode toward the anode. A second magnetic field is generated in the opposite direction, from the anode to the cathode by feeding a specified current to an external coil positioned around the discharge chamber. The external coil includes an around-cathode coil and an around-anode coil. The arc discharge can be started by operating a striker to carry out the deposition. | 10-20-2011 |
| 20130196177 | PROTECTIVE FILM AND MAGNETIC RECORDING MEDIUM HAVING THE PROTECTIVE FILM - A protective film for a magnetic recording medium is composed of amorphous carbon containing fluorine and nitrogen, the fluorine and nitrogen being present in a region 0.5 nm deep from a surface of the protective film. A magnetic recording medium includes a substrate; a metal film layer placed on the substrate; and the protective film placed on the metal film layer. A method for producing the protective film for a magnetic recording medium includes providing a stacked body containing a substrate and a metal film layer formed on the substrate; forming the protective film on the stacked body; and plasma-processing the protective film in a fluorine-containing gas and a nitrogen-containing gas. The protective film of the present invention simultaneously accomplishes reduction in film thickness, improvement of durability and corrosion resistance, and improvement of the bonding strength of the surface of the protective film to a lubricating film. | 08-01-2013 |
| 428835500 | Textured surface overcoat | 1 |
| 20130309526 | PLASMA POLISH FOR MAGNETIC RECORDING MEDIA - Fabrication methods for magnetic recording media that use a plasma polish are disclosed. For one exemplary method, a film of a magnetic recording medium is deposited, and a top surface of the film is polished utilizing a plasma formed by a noble gas to smoothen the top surface of the film. A subsequent layer is then deposited onto the polished top surface of the film. A top surface of the subsequent layer has a reduced roughness by being deposited on the polished top surface of the film. | 11-21-2013 |
| 428835600 | Organic compound overcoat | 4 |
| 20110159317 | FLEXIBLE SHEET WITH HIGH MAGNETIC PERMEABILITY AND FABRICATION METHOD THEREOF - A flexible sheet with high magnetic permeability is disclosed, including a magnetic ferrite sintering sheet including a plurality of pieces separated by micro gaps and a first flexible layer attached to a first side of the magnetic ferrite sintering sheet, wherein the pieces of the magnetic ferrite sintering sheet include a first protruding and recessing structure and a second protruding and recessing structure at opposite sides of one of the micro gaps, and the first protruding and recessing structure and the second protruding and recessing structure are matched with each other. | 06-30-2011 |
| 20150072172 | MICROPATTERN FORMATION METHOD, RELEASE METHOD, MAGNETIC RECORDING MEDIUM MANUFACTURING METHOD, MAGNETIC RECORDING MEDIUM, AND STAMPER MANUFACTURING METHOD - According to one embodiment, there is provided a pattern formation method including forming a target layer to be processed on a substrate, adding a second dispersion containing a polymer material including a polymer chain having a base metal at a terminal end and a second solvent to a first dispersion containing noble-metal microparticles and a first solvent, thereby preparing a noble-metal microparticle layer coating solution in which microparticles covered with the polymer material are dispersed, arranging the noble-metal microparticles covered with the polymer material on the target layer by using the noble-metal microparticle layer coating solution, and transferring a projections pattern of the noble-metal microparticles covered with the polymer material to the target layer. | 03-12-2015 |
| 428835700 | Fluorocarbon | 2 |
| 20150030887 | MAGNETIC DEVICES WITH MOLECULAR OVERCOATS - A data storage device including a substrate; a magnetic structure deposited on the substrate; and a molecular overcoat deposited on the magnetic structure, the molecular overcoat having a thickness of not greater than about 100 Å. | 01-29-2015 |
| 428835800 | Perfluoropolyether | 1 |
| 20130266822 | LUBRICANT WITH NON-TERMINAL FUNCTIONAL GROUPS - Lubricant with non-terminal functional groups. The location of the functional groups minimizes free chain length and molecular weight of a lubricant while simultaneously maximizing evaporation temperature. The locations of the functional groups to the backbone of the molecule of the lubricant allows for shorter lengths of free backbone length between functional groups attached to a lubricated surface. The lubricant lubricates mechanical devices including hard disk drives. The lubricant can also be added to media or other mechanical parts in conjunction with other lubricants. | 10-10-2013 |
