Patent application number | Description | Published |
20080285177 | MAGNETIC RECORDING MEDIUM, METHOD FOR MANUFACTURING THE SAME, AND MAGNETIC RECORDING APPARATUS - According to an aspect of an embodiment, a magnetic recording medium includes a substrate, and a first granular layer formed over the substrate, the first granular layer having a plurality of first magnetic particles and Si oxide separating the plurality of first magnetic particles. The magnetic recording medium further includes a second granular layer formed over the first granular layer, the second granular layer having a plurality of second magnetic particles and Ti oxide separating the plurality of second magnetic particles. | 11-20-2008 |
20090047448 | SOFT MAGNETIC THIN FILM, MANUFACTURING METHOD THEREFOR, PERPENDICULAR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORD REPRODUCING DEVICE - A soft magnetic thin film in which the recording magnetic field in the perpendicular direction can be preferentially intensified and sharply controlled when the thin film is applied to a perpendicular magnetic recording medium is provided. This soft magnetic thin film can be obtained by immersing a substrate into an electroless plating bath that contains a Co ion, Fe ion, and Ni ion as metal ions, as well as a completing agent and a boron-type reducing agent, wherein the content ratios of the metal ions on the mole basis are 0.15≦ (Ni ion amount/the amount of total metal ions) ≦0.40, 0.50≦ (Co ion amount/the amount of total metal ions) ≦0.80, and 0.05≦ (Fe ion amount/the amount of total metal ions) ≦0.15; and carrying out electroless plating in a magnetic field in a range of 5-2,000 Oe given in a direction parallel to the surface of said substrate. | 02-19-2009 |
20090061106 | PERPENDICULAR MAGNETIC MEMORY MEDIUM, A MANUFACTURING METHOD THEREOF, AND A MAGNETIC MEMORY STORAGE - A perpendicular magnetic memory medium capable of high-density recording and reproducing consists of a soft magnetic lining layer ( | 03-05-2009 |
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 |
20090197120 | MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING APPARATUS - A magnetic recording medium for vertical magnetic recording includes a substrate, and a layer laminated on the substrate, including a first magnetic recording layer made of a granular material, an exchange-coupling-strength control layer, a second magnetic recording layer made of a granular material, and a third magnetic recording layer made of a non-granular material. | 08-06-2009 |
20090244785 | MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING/REPRODUCTION DEVICE, AND METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - A magnetic recording medium suppresses effectively side erasure even when recording dot intervals are reduced. Magnetic dots and a soft magnetic layer are provided on a soft magnetic underlayer with a nonmagnetic layer intervening, so that magnetic dots are separated by the soft magnetic layer, and consequently leakage flux during recording to magnetic dots is absorbed by the soft magnetic layer, side erasure can be suppressed, and moreover the soft magnetic underlayer and soft magnetic layer are separated, so that an influence on recording/reproduction characteristics can be prevented. | 10-01-2009 |
20100140214 | MANUFACTURING METHOD FOR MAGNETIC RECORDING MEDIUM - The method for manufacturing a magnetic recording medium in a shape of a disk includes forming convex sections repeating on the upper surface of an intermediate layer in the radial direction of the disk, and each having an upper surface that repulses magnetic particles; and filling the magnetic particles into concave sections sandwiched by the convex sections in a self-assembling way to form a magnetic recording layer with the magnetic particles. | 06-10-2010 |
20110194207 | METHOD OF PRODUCING MAGNETIC STORAGE MEDIUM, MAGNETIC STORAGE MEDIUM AND INFORMATION STORAGE DEVICE - It is an object to provide a simple method capable of producing a magnetic storage medium, a magnetic storage medium and an information storage device which may be produced by a simple production method with a high recording density, and a magnetic disk is produced by a production method having: a film-forming process of forming, on a substrate | 08-11-2011 |
20110205663 | METHOD OF PRODUCING MAGNETIC STORAGE MEDIUM, MAGNETIC STORAGE MEDIUM AND INFORMATION STORAGE DEVICE - It is an object to produce a magnetic storage medium of a high recording density by a production method that does not impair mass productivity, and a magnetic storage medium | 08-25-2011 |
20110242700 | METHOD OF PRODUCING MAGNETIC STORAGE MEDIUM, MAGNETIC STORAGE MEDIUM AND INFORMATION STORAGE DEVICE - The following abstract replace prior abstract in the application. It is an object to provide a simple and practical method capable of producing a magnetic storage medium of a type such as a bit-patterned type, a magnetic storage medium of the above-mentioned type and an information storage device which may be produced by such a simple and practical method, and in a method of producing a magnetic disk, there are performed: a film-forming process of forming, on a glass substrate | 10-06-2011 |