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| Number | Title | Issue Date |
| 8092931 | 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−1 to... | 01/10/2012 |
| 7352524 | Magnetic disk drive A magnetic disk drive comprises a recording medium, a slider, and an alignment device for aligning the slider with respect to the medium. No film made of liquid lubricant is disposed on the surface of the medium. The slider incorporates: a slider main body including... | 04/01/2008 |
| 7070871 | Metallic thin film type magnetic recording medium and method of manufacturing thereof A method of manufacturing a metallic thin film type magnetic recording medium is provided. The method comprises the steps of arranging an initial substance of said recording medium in opposition to a plasma discharge electrode, said initial substance comprising a no... | 07/04/2006 |
| 6613422 | Nitrogen -implanted, high carbon density overcoats for recording media A method of forming a layer of a novel hard, abrasion and corrosion resistant, nitrogen-doped, high carbon density, amorphous carbon or hydrogenated carbon (C:H) protective overcoat material on a surface of a recording medium comprises steps of: (a) p... | 09/02/2003 |
| 5494742 | Magnetic recording medium having improved running time and corrosion resistance A magnetic recording medium comprising a non-magnetic substrate, a ferromagnetic metal film formed on said non-magnetic substrate, a carbon film which is formed on said ferromagnetic metal film and in which a concentration of at least one element selected... | 02/27/1996 |
| 5275850 | Process for producing a magnetic disk having a metal containing hard carbon coating by plasma chemical vapor deposition under a negative self bias A magnetic disk comprising a nonmagnetic substrate, a metallic thin film magnetic layer provided on the substrate and a hard carbon protective layer provided on the magnetic layer, the hard carbon protective layer containing at least one metal element of ... | 01/04/1994 |
| 5266409 | Hydrogenated carbon compositions A composition of matter having an atomic density between that of pure diamond and at least 0.18 g-atoms per cubic centimeter and the formula: C1-z-w Siz Aw [H1-x Fx ]y where: 0ࣘz+wࣘ0.15, 0ࣘwࣘ... | 11/30/1993 |
| 5232791 | Magnetic recording medium having a carbon rich coating The present invention provides a magnetic recording medium that includes a polymeric flexible substrate and a magnetic layer coating thereon, with a binderless carbon rich layer adhered to the magnetic layer. The present invention also provides a process for t... | 08/03/1993 |
| 5198285 | Hard and lubricant thin film of iron base metallic material coated with amorphous carbon-hydrogen-silicon A hard and lubricant thin film of amorphous carbon-hydrogen-silicon and a process of producing the same. The thin film comprises carbon and hydrogen as major components, the balance mainly containing a silicon-based material, and it contains diamond-like ... | 03/30/1993 |
| 5182132 | Magnetic recording medium and method for making it In making a magnetic recording medium, a diamond-like carbon film is formed stably with high product efficiency such as 200 Å/sec, without occurrence of irregular discharge, and improved still durability and reduced head contamination are achieved by uti... | 01/26/1993 |
| 4844978 | Magnetic recording medium In a magnetic recording medium comprising a substrate, a ferromagnetic metal thin film formed on the substrate, and a topcoat formed on the thin film, the topcoat is a plasma-polymerized film containing carbon and hydrogen in an atomic ratio of C/H of fro... | 07/04/1989 |
| 4835070 | Magnetic recording medium and method of producing the same A magnetic recording medium has a non-magnetic substrate, a magnetic layer formed on the surface of the substrate containing a ferromagnetic material, and a protective film formed on the magnetic layer. The protective film is constituted by a singular lay... | 05/30/1989 |
| 4780354 | Magnetic recording medium A magnetic recording medium comprising a substrate, a plasma polymerized film, and a magnetic layer is improved in physical and electromagnetic properties when the plasma polymerized film is comprised of carbon, or carbon and at least one optional element... | 10/25/1988 |
| 4769281 | Magnetic recording medium and method of manufacturing the same This invention relates to a magnetic recording medium in which a protective film prepared by plasma polymerization of an organic compound such as dibenzyl or diphenyl which exhibits a solid phase at room temperature and under atmospheric pressure is forme... | 09/06/1988 |
| 4749608 | Magnetic recording medium A magnetic recording medium comprising a substrate, a ferromagnetic metal thin film on the substrate, and a topcoat on the thin film exhibits improved strength and durability when the topcoat is comprised of a plasma-polymerized film prepared by activatin... | 06/07/1988 |
| 4737415 | Magnetic recording medium and production thereof A magnetic recording medium comprising a substrate, a magnetic layer and a protective layer which consists of an organic polymeric material comprising carbon atoms, hydrogen atoms and oxygen atoms, the content of the oxygen atoms increasing towards the ou... | 04/12/1988 |
| 4717622 | Magnetic recording media A magnetic recording medium has a protective layer made of high hardness carbon synthesized under a low-temperature and a low-pressure by blowing hydrocarbon gas plasma onto a magnetic recording layer. The resistance thereof is large, and therefore, high ... | 01/05/1988 |
| 4711809 | Magnetic recording medium A magnetic recording medium is disclosed which comprises a support having provided thereon a thin magnetic metal film, a plasma polymerized layer being provided on the thin magnetic film, in which the plasma polymerized layer is formed in a monomer gas or... | 12/08/1987 |
| 4693799 | Process for producing plasma polymerized film A process for producing a plasma polymerized film, which comprises forming a plasma polymerized film on the surface of a substrate placed in a reaction zone by subjecting an organic compound containing gas to plasma polymerization utilizing low temperatur... | 09/15/1987 |
| 4693927 | Magnetic recording medium and process for producing the same A magnetic recording medium has an improved protective film covering a thin magnetic metal thin film provided on a non-magnetic support. The protective film consists of a plurality of layers formed by plasma polymerization, the base layer of which has a d... | 09/15/1987 |
| 4636435 | Polymeric thin film, process for producing the same and products containing said thin film The present invention concerns a process for producing a novel polymeric thin film having high density, high hardness and high toughness on the surface of a substrate by plasma polymerization. This process comprises providing a gas containing at least one... | 01/13/1987 |
| 4599266 | Magnetic recording medium A magnetic recording medium is coated, over its magnetic layer, with a thin film of a siloxane-linkage-containing polymer. The magnetic layer consists of a thin film formed by vacuum evaporation or sputtering or by dispersion of a ferromagnetic metal powd... | 07/08/1986 |
| 4582746 | Magnetic recording medium Weather resistance and lubricity of a magnetic recording medium comprising a non-magnetic support having provided thereon a vapor deposited magnetic thin film mainly composed of cobalt, nickel and oxygen can be improved by limiting the amount of nickel an... | 04/15/1986 |
