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| Number | Title | Issue Date |
| 7736770 | Substrate for information recording media and manufacturing method thereof, information recording medium, and starting material glass plate A substrate for use as a disk substrate in a hard disk drive or the like, an information recording medium such as a magnetic disk, and a starting material glass plate which is a starting material of the substrate for information recording media. The forming conditio... | 06/15/2010 |
| 7179551 | Poly(arylene ether) data storage media A storage media comprises: a substrate comprising a plastic resin portion, wherein to plastic resin portion comprises poly(arylene ether) and a styrene material selected from the group consisting of polystyrene, styrenic copolymer(s), and reaction products and combi... | 02/20/2007 |
| 7166320 | Post-deposition annealed recording media and method of manufacturing the same A novel technique for incorporating rapid thermal annealing into media sputter fabrication has facilitated the production of flyable media samples. Discs are fabricated with standard processing techniques to control physical grain size and crystallite texture. A CrM... | 01/23/2007 |
| 7147944 | Substrate for magnetic recording media using dried thermoplastic norbornene resin and magnetic recording media using substrate The gas components in thermoplastic norbornene resin pellets are suppressed below certain levels by drying the resin under vacuum or under the ordinary pressure and under vacuum. A substrate for magnetic recording media is manufactured by injection-molding the resin... | 12/12/2006 |
| 7112377 | Magnetic recording medium, method of manufacturing the same, magnetic medium substrate employed in the magnetic recording medium, and magnetic storage unit A magnetic recording medium is disclosed that includes a substrate; an anodic alumina film formed on the substrate; a pore formed in the anodic alumina film; a carbon layer covering the surface of the anodic alumina film and the inner wall of the pore; a magnetic pa... | 09/26/2006 |
| 7090937 | Glass substrate for information recording medium and magnetic information recording medium to which the glass substrate is applied Disclosed are a glass substrate for an information recording medium, having excellent scratch resistance and a light weight and having high fracture toughness, the glass substrate having a fragility index value, measured in water, of 12 μm−1/2 or less ... | 08/15/2006 |
| 6974643 | Servo pattern formation via transfer of sol-gel layer and magnetic media obtained thereby A method of manufacturing a magnetic recording medium including a servo pattern, comprising steps of: (a) providing a non-magnetic substrate including at least one major surface; (b) providing a stamper having a su... | 12/13/2005 |
| 6974642 | Carbonaceous protective layer, magnetic recording medium, production method thereof, and magnetic disk apparatus A carbonaceous protective layer particularly suitable for use in magnetic recording media. The carbonaceous protective layer is formed by a Filtered Cathodic Arc process, and contains nitrogen distributed therein. A process for the production of a carbonaceous prote... | 12/13/2005 |
| 6656614 | Method for manufacturing magnetic media with textured CSS landing zone formed by ion implantation, and media obtained thereby A method of texturing the surface of a CSS/landing zone of a substrate for a magnetic recording medium, comprising steps of: (a) providing a disk-shaped substrate having a surface; (b) providing a patterned mask in overlying relation to the substrate s... | 12/02/2003 |
| 6632547 | Substrate for magnetic recording medium, manufacturing method thereof, and magnetic recording medium A slowly advancing tape-shaped matrix is pressed into contact with a surface of a rapidly rotating non-magnetic substrate for a magnetic recording medium. An abrasive slurry is added to the matrix. The area contact rate between the matrix and the surface,... | 10/14/2003 |
| 5186976 | Method for producing sheet-formed recording medium A method for producing a sheet-formed recording medium having a heat treatment step of a synthetic resin base material, in which the base material is formed into a sheet before or after providing a recording layer on the surface of the base material, and ... | 02/16/1993 |
| 5147679 | Method for providing uniaxial anisotropy in magnetic recording disks A method and apparatus for providing radial uniaxial anisotropy in the soft magnetic layer of a magnetic recording disk is disclosed. While the soft magnetic layer is being deposited on the recording disk, the magnetic field. The alternating perpendicular... | 09/15/1992 |
| 5138506 | Disk drive lubricant reservoir A lubricant reservoir for a vapor transport type rigid magnetic disk drive lubricant system includes a metal heat sink that presents a finned surface at the side exposed to the outside environment. A second surface within the sealed head-disk enclosure co... | 08/11/1992 |
| 5108698 | Method of making plate-shaped material A method of making a disc-shaped or plate-shaped sintered body from powdered material of poor ductility, such as Sendust alloy, wherein the powdered material is filled in a dish-like metallic vessel having a thick bottom wall and a low side wall, a plural... | 04/28/1992 |
| 4868009 | Method for uniform deposition of solid lubricant on rigid data storage discs The invention is concerned with a method and apparatus for uniformly depositing a solid lubricant coating on a data storage disc. The method comprises passing the entire disc, in horizontal orientation with a first side thereof facing downwardly, through ... | 09/19/1989 |
| 4828895 | Magnetic recording medium for test purposes, in particular for calibrating flying heads A magnetic recording medium for test purposes, in particular for calibrating flying heads, consists of a firm substrate which has a raised calibration area in the form of an arc-shaped step of defined length, width, height and hardness. Sharp initial and ... | 05/09/1989 |
| 4824708 | Process for producing magnetic recording medium A disk-form magnetic recording medium having a minimized change in output on an output envelope is produced by a process which comprises coating a nonmagnetic substrate with a magnetic paint and applying a magnetic field for orientation to the magnetic pa... | 04/25/1989 |
| 4808489 | Method of producing magnetic disc A magnetic disc comprises a non-magnetic underlayer formed on a substantially flat surface of a substrate by growing grains of a magnetic material in a circumferential direction of the magnetic disc, and a magnetic layer formed on the non-magnetic underla... | 02/28/1989 |
| 4776938 | Method of producing magnetic disc A magnetic disc comprises a non-magnetic underlayer formed on a substantially flat surface of a substrate by growing grains of a magnetic material in a circumferential direction of the magnetic disc, and a magnetic layer formed on the non-magnetic underla... | 10/11/1988 |
| 4716063 | Information recording disk An information recording disk has a transparent support substrate and a transfer layer formed thereon using a stamper. The transfer layer comprises a precursor having as major components a cycloacetal compound having at least two polymerizable unsaturated... | 12/29/1987 |
| 4588653 | Magnetic memory disk A magnetic memory disk which has controlled magnetic characteristics in the radial direction is provided by controlling the thickness and composition of the magnetic layer which is formed on the disk. The thickness of the layer may be varied in the radial... | 05/13/1986 |
| 4556597 | Ion doped servo pattern for magnetic recording disk A magnetic recording disk substrate is provided with a capacitive servo pattern by implanting dopant material in the substrate to modify the substrate conductivity in a desired servo pattern.... | 12/03/1985 |
| 4549922 | Method of making magnetic disk cartridge Guide bars are positioned to define the center of a magnetic recording medium by contacting the inner circumference of a circular hole of the magnetic recording medium. Through holes are positioned in a medium grasping portion of a lower hub at equal dist... | 10/29/1985 |
| 4057831 | Video record disc manufactured by a process involving chemical or sputter etching A mother for manufacturing long-playing video records is provided by (1) selectively exposing a photoresist disposed as the outer layer on a substrate comprising a disc-shaped plate, a thin layer of base material, e.g., an oxide of nitride, adhering to th... | 11/08/1977 |
