| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 428833000 | Single magnetic layer with plural overcoat layers | 40 |
| 20080305365 | Magnetic Recording Medium and Manufacturing Method Therefor - A card-like magnetic recording medium comprising a non-magnetic substrate and a laminate containing a magnetic recording layer wherein the laminate is placed in at least a portion of the non-magnetic substrate; wherein the laminate comprises a light reflection quantity controlling layer, which includes a binder resin and at least one of a scale-like metal powder and fine flakes obtained from a metallic thin film and is formed on the magnetic recording layer, and further comprises a glistening coating layer which includes glistening particles and is formed on the light reflection quantity controlling layer; and the maximum reflectance of diffuse reflection light with respect to incident lights having a wavelength from 400 to 700 nm is 20 to 70% on a portion where the glistening coating layer is provided. | 12-11-2008 |
| 20100136371 | Perfluoropolyether compound, and lubricant and magnetic disk each using the same - A compound of the formula (I), and lubricant, and magnetic disk each using the same | 06-03-2010 |
| 20100173176 | Recording Media Having a Nanocomposite Protection Layer and Method of Making Same - An apparatus includes a substrate, a recording layer on the substrate, and a nanocomposite layer on the recording layer, the nanocomposite layer including a wear-resistant material and a solid lubricant material, wherein the atomic percentage of the solid lubricant material in the nanocomposite layer is in a range from about 5% to about 99%. A method of making the apparatus is also provided. | 07-08-2010 |
| 20100304186 | MAGNETIC DISK AND METHOD OF MANUFACTURING THE SAME - Provided is a magnetic disk comprising a lubricating layer formed of a lubricant. The lubricant constituting the lubricating layer has excellent properties, for example, excellent fluidity, surface energy, and CFT properties. By virtue of the excellent properties, the magnetic disk has a high level of reliability despite a low flying height of a magnetic head due to a recent rapid increase in recording density and a very severe environment resistance requirement due to diversification of applications. The magnetic disk comprises a substrate and at least a magnetic layer, a protective layer, and a lubricating layer provided in that order over the substrate. The lubricating layer is formed of a lubricant that is a mixture of a specific perfluoropolyether lubricant with a lubricant formed of a compound comprising perfluoropolyether groups having a perfluoropolyether main chain in the structure thereof and having a hydroxyl group at the end thereof, the perfluoropolyether groups being bonded to each other through a divalent linking group having at least two hydroxyl groups in the structure thereof. | 12-02-2010 |
| 20110014498 | MAGNETIC DISK AND METHOD OF MANUFACTURING THE SAME - This invention provides a magnetic disk which can satisfactorily suppress the elution of internal components from an end face of a magnetic disk, and corrosion damage. The magnetic disk comprises a disk substrate, and a thin film including a magnetic layer, a carbon-based protective layer, and a lubricating layer provided in that order on the disk substrate. The main surface and the end face of the magnetic disk are covered with the carbonaceous protective layer. The carbon-based protective layer contains nitrogen at a part adjacent to the lubricating layer. The content of nitrogen atoms relative to the content of carbon atoms in the protective layer formed on the end face is equal to or more than the content of nitrogen atoms relative to the content of carbon atoms in the protective layer formed on the main surface. | 01-20-2011 |
| 20110064970 | COMPOSITE LUBRICANT FOR HARD DISK MEDIA - A composite lubricant for recording disk media, a recording disk media including a layer of the composite lubricant, and method of manufacturing the same are described. The composite lubricant may include a non-phosphazene component and a phosphazene component where the non-phosphazene component is a difunctional perfluoropolyether compound terminated with first and second polar end groups, the first polar end group comprising a first number of hydroxyls and the second polar end includes a second number of hydroxyls, greater than the first number of hydroxyls. The phosphazene component may be a difunctional perfluoropolyether compound terminated with a phosphazene functional group and with a third polar end group, the third polar end group comprising a third number of hydroxyls equal to the second number of hydroxyls. | 03-17-2011 |
| 20120148875 | LUBRICANT FOR MAGNETIC DISC, MAGNETIC DISC AND METHOD OF PRODUCING THE SAME - A magnetic disk with which further reduction of magnetic spacing can be realized and which has high reliability under such circumstances of a lower floating amount of a magnetic head involved in the recent rapid increase in recording density and of extremely severe environmental resistance involved in diversification in use applications is provided. | 06-14-2012 |
| 20120295134 | PERFLUOROPOLYETHER COMPOUND, MANUFACTURING METHOD THEREFOR, LUBRICANT CONTAINING SAID COMPOUND, AND MAGNETIC DISC - An object of the present invention is to provide a compound (lubricant) that exhibits better fluidity and adsorbability on the surface of a disk than conventional end-modified compounds, that is thermally stable, and that is obtained by introducing an additional functional group to the end(s) of a perfluoropolyether having a hydroxy group. | 11-22-2012 |
| 20130209837 | FLUOROPOLYETHER COMPOUND, LUBRICANT AND MAGNETIC DISK EACH CONTAINING THE SAME - A compound of the formula (1), lubricant containing the compound and magnetic disk | 08-15-2013 |
| 20130288080 | PERFLUOROPOLYETHER CONTAINING LUBRICANTS WITH MIXED END GROUPS - Compounds of formula I: | 10-31-2013 |
| 20140099518 | LUBRICANTS FOR DATA STORAGE - Disclosed herein are compounds of formula I: | 04-10-2014 |
| 20140141284 | LUBRICANT COMPOSITIONS - A compound of Formula (I) includes: [L] | 05-22-2014 |
| 20140349140 | CXNYHZ FILM, DEPOSITION METHOD, MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME - To provide a C | 11-27-2014 |
| 20150315515 | UV CROSS-LINKING NEAT LUBRICANT MIXTURES FOR MAGNETIC RECORDING MEDIA - Disclosed herein is a lubricant for lubricating a surface of a magnetic recording medium. The lubricant is a substantially solvent free lubricant that includes a plurality of lubricant molecules. Each lubricant molecule includes a polymer chain that has a backbone section and at least one functional end group. Each lubricant molecule is exposed to a physical treatment to cross-link one of the backbone section of the polymer chain and the at least one functional end group with at least one other molecule. | 11-05-2015 |
| 20150371671 | FLUOROPOLYETHER COMPOUND, AND LUBRICANT AND MAGNETIC DISC USING SAME - A compound of the formula (1), and lubricant, and magnetic disk each using the same | 12-24-2015 |
| 20150371672 | FLUOROPOLYETHER COMPOUND, AND LUBRICANT AND MAGNETIC DISC COMPRISING SAME - A compound of the formula (1), lubricant containing the compound and magnetic disk | 12-24-2015 |
| 20160203839 | FLUOROPOLYETHER COMPOUND, LUBRICANT CONTAINING SAME, AND MAGNETIC DISK | 07-14-2016 |
| 428833100 | Inorganic overcoat layer | 23 |
| 20090202866 | VERTICAL MAGNETIC RECORDING DISK MANUFACTURING METHOD AND VERTICAL MAGNETIC RECORDING DISK - In a method of manufacturing a magnetic disk including at least a magnetic recording layer on a substrate | 08-13-2009 |
| 20100124672 | GRANULAR PERPENDICULAR MEDIA WITH CORROSION-RESISTANT CAP LAYER FOR IMPROVED CORROSION PERFORMANCE - A perpendicular magnetic recording media having an amorphous corrosion-resistant cap layer is disclosed. Preferably, the cap layer is a chromium alloy comprising Pt and C. A method of manufacturing the media is also disclosed. | 05-20-2010 |
| 20100221581 | PROCESS FOR FABRICATING PATTERNED MAGNETIC RECORDING MEDIA - A method of fabricating a patterned magnetic recording medium, comprises steps of: (a) providing a layer stack including an uppermost non-magnetic interlayer; (b) forming a resist layer on the interlayer; (c) forming a first pattern comprising a first group of recesses extending through the resist layer and exposing a first group of spaced apart surface portions of the interlayer; (d) filling the first group of recesses with a layer of a hard mask material; (e) selectively removing the resist layer to form a second pattern comprising a second group of recesses extending through the hard mask layer and exposing a second group of spaced apart surface portions of the interlayer; and (f) filling the second group of recesses with a layer of a magnetically hard material forming a magnetic recording layer. | 09-02-2010 |
| 20150017482 | METHOD FOR FABRICATING PLASMONIC CLADDING - The embodiments disclose a plasmonic cladding structure including at least one conformal plasmonic cladding structure wrapped around plural stack features of a recording device, wherein the conformal plasmonic cladding structure is configured to create a near-field transducer in close proximity to a recording head of the recording device, at least one conformal plasmonic cladding structure with substantially removed top surfaces of the stack features with exposed magnetic layer materials and a thermally insulating filler configured to be located between the stack features. | 01-15-2015 |
| 428833200 | Carbon overcoat (e.g., graphite, diamond like, doped carbon, etc.) | 19 |
| 20090305081 | METHOD FOR PLANARIZING A MAGNETIC RECORDING DISK HAVING PRE-PATTERNED SURFACE FEATURES AND DISK WITH PLANARIZED SURFACE - A method for planarizing a magnetic recording disk that has surface features of elevated lands and recessed grooves includes forming two coatings of cured perfluorinated polyether (PFPE) polymers over the surface features. The disk may have a protective carbon overcoat with a surface that replicates the topography of lands and grooves. A liquid functionalized-PFPE is applied over the disk surface and then cured to form a first coating with the functionalized end groups bonding to the carbon overcoat. A liquid non-functionalized-PFPE polymer is then applied over the functionalized-PFPE coating and cured to form a second coating. The combined coatings substantially planarize the disk surface so that there is minimal recession between the top of the coating over the lands and the top of the coating over the grooves. | 12-10-2009 |
| 20100310904 | Magnetic disk comprising an aluminum alloy oxynitride underlayer and a diamond-like carbon overcoat - A magnetic disk is protected by a bilayer. The bilayer is formed as an adhesion enhancing underlayer and a protective diamond-like carbon (DLC) overlayer. The underlayer is formed of an aluminum or alloyed aluminum oxynitride, having the general formula AlO | 12-09-2010 |
| 20120196154 | MAGNETIC RECORDING MEDIUM FOR HEAT-ASSISTED RECORDING DEVICE AND MANUFACTURING METHOD THEREOF - Disclosed are a magnetic recording medium for a heat-assisted recording device which has a high SNR at high density and a manufacturing method thereof. The magnetic recording medium includes, in the order recited: a non-magnetic substrate; a magnetic recording layer; a protective layer; and a liquid lubricating layer. The magnetic recording layer has a granular structure formed by a magnetic portion and a non-magnetic portion that surrounds the magnetic portion, the non-magnetic portion having a volume percentage based on the total volume of the granular structure ranging from 15 vol % to 30 vol % and including a carbon-based material. The magnetic recording medium has a surface having an arithmetic mean roughness Ra and an average length of roughness curve elements RSm such that Ra/RSm ranges from 0.05 to 0.15. | 08-02-2012 |
| 20130034746 | RECORDING MEDIUM - A recording medium for recording and reproducing information by means of a head which performs information readout and writing based on magnetic principles is disclosed. The medium comprises a magnetic layer formed on a substrate and a protective layer formed on the magnetic layer. The protective layer comprises an underlayer formed on the magnetic layer and includes a material selected from the group consisting of silicon, silicon carbide and germanium. A carbon layer formed on the underlayer includes amorphous carbon containing hydrogen. The amount of hydrogen in the carbon layer is 24.7 at % or higher and 46.8 at % or lower, the thickness of the underlayer is 0.3 nm or greater and 1.8 nm or less, and the thickness of the carbon layer is 0.2 nm or greater and 1.7 nm or less. The medium exhibits corrosion resistance, sliding durability and head flying characteristics, and reduces magnetic spacing while securing reliability. | 02-07-2013 |
| 20130337290 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING SAME - A magnetic recording medium and related method of manufacturing a magnetic recording medium that has a protective layer for the magnetic recording medium and that exhibits excellent corrosion resistance in the protective layer. The magnetic recording medium includes on a nonmagnetic substrate a magnetic layer and a protective layer formed on the magnetic layer. The protective layer is formed of a lower layer in contact with the magnetic layer and an upper layer formed on the lower layer. The material used in the lower layer is a metal having a standard electrode potential of −0.8 to 0.3 V. | 12-19-2013 |
| 20150017483 | METHOD OF FABRICATION OF AN ANISOTROPY MAGNETIC LAYER OF A PATTERNED STACK - Provided herein is a method including oxidizing tops of features of a patterned magnetic layer to form oxidized tops of the features; removing an excess of an applied first protective material down to at least the oxidized tops of the features to form a planarized layer; and applying a second protective material over the planarized layer. | 01-15-2015 |
| 20150037614 | COMPOSITION AND METHOD FOR PLANARIZED BIT-PATTERNED MAGNETIC MEDIA - The present disclosure relates to a planarized bit-patterned magnetic medium that has a magnetic layer, including island regions and trench regions, a first carbon layer applied over the magnetic layer, and a second carbon layer applied over the first carbon layer, wherein the second carbon layer has been removed in the island regions. The first carbon layer may have a lower material removal rate when exposed to chemical-mechanical polishing than the second carbon layer. The present disclosure also relates to a method for planarizing a bit-patterned magnetic medium and a slurry composition for the chemical-mechanical polishing of carbon layers, the slurry composition including an oxidizer component, a catalyst component, a particulate component, and a reaction control component. | 02-05-2015 |
| 428833300 | With lubricant over carbon layer | 11 |
| 20080268294 | Magnetic disk, method of manufacturing the magnetic disk and method of evaluating the magnetic disk - A protection layer containing carbon as a major component is deposited by plasma CVD. The protection layer has film quality such that, when a spectrum is obtained by excluding photoluminescence from a Raman spectrum in a wavenumber band from 900 cm | 10-30-2008 |
| 20090023017 | MAGNETIC DISK - Disclosed is a magnetic disk which has a lubricant layer with excellent heat resistance and high adhesiveness and is free from fly-stiction failure or corrosion failure even at an extremely low flying height of | 01-22-2009 |
| 20090075123 | LUBRICANT FOR THIN FILM STORAGE MEDIA - Embodiments relate to lubricants disposed over magnetic storage media, such as rotatable thin film magnetic discs. One embodiment comprises a lubricant compound of a fluoropolyether chain having one or more carbonyl-imide pairs. For example, the carbonyl-imide pair may be located at one end, both ends, and/or in the middle of the fluoropolyether chain. | 03-19-2009 |
| 20090297887 | Thin Film Lubricant For Advanced Tribological Performance Of Storage Medium - A lubricant for improving the durability and reliability of recording media used in hard drives is disclosed. The lubricant comprises a perfluoropolyether main chain with a first end attached to a hexa(trifluoromethylphenoxy)cyclotriphosphazene, a second end attached to a bonding enhancer for enhancing bonding between the lubricant and a carbon-containing layer. The bonding enhancer of the lubricant can contain multiple hydroxyl, amide groups, 2,3-dihydroxy-1-propoxyl, acetamide, methacrylate, methyl methacrylate and glycidyl ether. Some bonding enhancers such as methacrylate, methyl methacrylate or glycidyl ether, can be further activated with ultraviolet light. | 12-03-2009 |
| 20090317663 | MAGNETIC RECORDING MEDIUM - Provided is a magnetic recording medium. The magnetic recording medium includes a substrate, a recording layer disposed on the substrate for magnetic recording, and a carbon protection layer, which includes a carbon layer and a blocking layer disposed in the carbon layer to block infiltration of external impurities, disposed on the recording layer. Since the blocking layer is disposed in the carbon layer, a thickness of the carbon protection layer can be reduced while a sufficient hardness to protect the recording layer can be ensured, and moreover, a softness of the surface of the carbon protection layer can be improved. | 12-24-2009 |
| 20110256425 | LUBRICATING FILM, MAGNETIC DISK AND MAGNETIC HEAD - A magnetic disk or magnetic head having a lubrication film of a lubricant bonded in a ratio of at least 99% to a protective carbon film on a magnetic disk member, the lubricant containing a perfluoropolyether compound (Q) | 10-20-2011 |
| 20140065445 | MAGNETIC RECORDING MEDIUM - A magnetic recording medium includes a substrate having sequentially formed thereon a magnetic layer; a protective layer having a thickness ranging from 1.0 nm to 2.5 nm and being composed of an amorphous metal layer having a thickness of at least 0.3 nm formed on the magnetic layer, and a carbon layer composed of amorphous carbon having a thickness of at least 0.3 nm formed on the amorphous metal layer; and a lubricating layer, wherein the carbon layer includes nitrogen atoms in a surface thereof in which a ratio of number of nitrogen atoms to total number of carbon atoms, nitrogen atoms, and oxygen atoms is 14 atomic % or less. Recording performance is improved by reducing the thickness of the protective layer thereof. A method of manufacturing the magnetic recording medium includes performing a nitrogen plasma treatment on a surface of the carbon layer that is effective to adjust the ratio. | 03-06-2014 |
| 20140234666 | LUBRICANTS COMPRISING PFPE TERMINATED WITH BENZENE OR FUNCTIONAL BENZENE END GROUPS FOR MAGNETIC RECORDING MEDIA STRUCTURE - A novel lubricant comprising a perfluoropoyether (PFPE) molecule terminated with a benzene molecule or a functional benzene molecule for a magnetic recording media structure is disclosed. The magnetic recording media structure includes a substrate, a magnetic recording layer for recording information disposed over the substrate, a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer, and a lubricant layer disposed over the protective overcoat layer and comprising a perfluoropoyether (PFPE) molecule terminated with a benzene molecule or a functional benzene molecule. | 08-21-2014 |
| 20150010781 | RECORDING MEDIUM - A recording medium includes a magnetic recording layer formed on a substrate; a protective layer formed on the magnetic recording layer and having a total thickness that is equal to or greater than 1 nm but equal to or less than 2 nm. The protective layer is composed of a silicon oxide layer formed on the magnetic recording layer and having a thickness of 0.3 nm or more; a silicon layer formed on the silicon oxide layer and having a thickness of 0.2 nm or more; and an amorphous carbon layer formed on the silicon layer and having a thickness of 0.2 nm or more, and having a hydrogen content equal to or greater than 25.6 at % but equal to or less than 43.3 at %. Thus, magnetic spacing between the magnetic recording layer and a magnetic head advantageously may be reduced while maintaining the thermal insulation characteristics. | 01-08-2015 |
| 20150353558 | Ionic Liquid, Lubricating Agent, and Magnetic Recording Medium - A lubricating agent including an ionic liquid formed from a Bronsted acid (HX) and a Bronsted base (B), wherein the Bronsted base has a linear hydrocarbon group having 10 or more carbon atoms and the difference between the pKa value of the Bronsted acid in water and the pKa value of the Bronsted base in water is 12 or more. | 12-10-2015 |
| 20160055874 | MAGNETIC DISK AND MANUFACTURING METHOD THEREOF - A magnetic disk of is provided, the magnetic disk having at least a magnetic layer, a carbon protective layer, and a lubrication layer sequentially provided on a substrate. In an embodiment, the lubrication layer a film formed by a lubricant having a perfluoropolyether compound A having a perfluoropolyether main chain in the structure and also having a hydroxyl group at the end and a compound C obtained from a reaction between a compound B expressed by: [Chemical formula 1] CF | 02-25-2016 |
| 428833500 | Having elemental nitrogen in carbon layer | 1 |
| 20110195276 | RESIST ADHENSION TO CARBON OVERCOATS FOR NANOIMPRINT LITHOGRAPHY - In an imprint lithography process, a carbon overcoat (COC) layer has nitrogen introduced into an upper surface region thereof before application of an adhesion layer to the COC/substrate combination. This results in the formation of a thin layer of nitrogenated carbon at the surface of the COC layer that promotes covalent bonding with the functional groups of the adhesion layer and, thus, significantly improves resist adhesion upon imprint template removal. Thus, an embodiment of an imprint lithography method comprises introducing nitrogen into an upper surface region of the COC layer, forming an adhesion layer on the nitrogenated COC layer, forming resist on the adhesion layer, contacting the resist with an imprint template having patterned features formed therein such that the resist fills the patterned features of the imprint template, and separating the imprint template from the resist such that a negative image of the patterned features is formed in the resist. An embodiment of an imprint structure comprises a substrate, a COC layer formed on the substrate, the COC layer having a nitrogenated upper surface region formed therein, and adhesion layer formed on the COC layer, and resist formed on the adhesion layer. | 08-11-2011 |
