摘要:
A granular magnetic recording medium comprises a non-magnetic substrate having a surface, a layer stack on the substrate surface, including an outermost granular magnetic recording layer, a cap layer on the granular magnetic recording layer, having a sputter-etched outer surface, and a protective overcoat layer on the sputter-etched outer surface of the cap layer.
摘要:
A granular longitudinal or perpendicular magnetic recording medium with enhanced corrosion resistance comprises: (a) a non-magnetic substrate having a surface; (b) a layer stack on the substrate surface, including a granular longitudinal or perpendicular magnetic recording layer having a surface distal the substrate surface treated to provide at least one of: (i) a reduction of nano-scale roughness and porosity; (ii) increased compositional homogeneity; (iii) increased microstructural homogeneity; (iv) preferential removal of at least one element; and (v) increased grain boundary coverage by the subsequently deposited protective overcoat layer; and (c) a protective overcoat layer on the treated surface of the granular magnetic recording layer.
摘要:
A magnetic recording medium with a dual-layer lubricant for better and faster mobility of a lubricant to ensure rapid healing of areas of the medium that have been depleted of the lubricant is disclosed.
摘要:
A system and method for improving the durability and reliability of recording media used in hard drives is disclosed. A protective overcoat made by depositing a diamond like carbon (DLC) layer over a magnetic layer and then depleting a portion of the DLC protective layer of hydrogen before it is coated with a Perfluoropolyethers (PFPE) using an in-situ vapor lubrication technique. The portion of the DLC layer which is depleted can be data zone of the media so that the lubricant-bonding ratio is higher for the landing zone than it is for the data zone.
摘要:
A magnetic recording medium comprising a magnetic layer and a protective carbon-containing overcoat comprising a first carbon density, preferably of a low-density carbon, and a second carbon density different from the first carbon density, preferably of a high-density carbon, and a method of making and using the magnetic recording medium are disclosed.
摘要:
A recording medium, comprising: (a) a substrate having at least one surface; (b) a stacked plurality of thin film layers on the at least one surface and including at least one magnetic or magneto-optical (MO) recording layer; and (c) a protective overcoat layer on an outer surface of an outermost layer of the layer stack, comprising: (i) a first sub-layer layer (c1) of undoped tetrahedral amorphous carbon (ta-C) formed by filtered cathodic arc deposition (FCAD) on the outer surface of the outermost layer of the stacked plurality of thin film layers and having a high mass density of carbon (C) atoms greater than about 2.5 gms/cm3; and (ii) a second sub-layer (c2) of nitrogen-doped tetrahedral amorphous carbon (ta-C:N) formed by FCAD on the undoped ta-C layer and having a high mass density of carbon (C) atoms greater than about 2.0 gms/cm3.
摘要翻译:一种记录介质,包括:(a)具有至少一个表面的基底; (b)在所述至少一个表面上堆叠的多个薄膜层,并且包括至少一个磁光或磁光(MO)记录层; (c)在层叠体的最外层的外表面上的保护性外涂层,包括:(i)未掺杂的四面体无定形碳(ta)的第一子层层(c 1) -C)通过过滤的阴极电弧沉积(FCAD)形成在层叠的多个薄膜层的最外层的外表面上,并且具有大于约2.5gms / cm 2的碳(C)原子的高质量密度, 3 SUP>; 和(ii)由FCAD在未掺杂的Ta-C层上形成并且具有高质量密度的由氮化物掺杂的四面体无定形碳(ta-C:N)的第二子层(c 2 N 2) 的碳(C)原子大于约2.0gms / cm 3。
摘要:
A magnetic recording medium comprising a magnetic layer and a protective carbon-containing overcoat comprising a first carbon density, preferably of a low-density carbon, and a second carbon density different from the first carbon density, preferably of a high-density carbon, and a method of making and using the magnetic recording medium are disclosed.
摘要:
A method of manufacturing magnetic recording media, comprising sequential steps of: (a) providing an apparatus for manufacturing the media; (b) supplying the apparatus with at least one substrate for the media; (c) forming a magnetic recording layer on the at least one substrate in a first portion of the apparatus, the magnetic recording layer including a surface; (d) treating the surface of the magnetic recording layer with an ionized oxygen-containing plasma in a second portion of the apparatus to form a plasma oxidized surface layer; and (e) forming a protective overcoat layer on the plasma oxidized surface layer of the magnetic recording layer in a third portion of the apparatus.
摘要:
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.
摘要:
A perpendicular magnetic recording medium having a substrate, a Cr-doped Fe-alloy-containing underlayer containing about 8 to 18 at % Cr and a perpendicular recording magnetic layer, and a process for improving corrosion resistance of the recording medium and for manufacturing the recording medium are disclosed.