Patent application number | Description | Published |
20090081483 | PERPENDICULAR MAGNETIC RECORDING DISK AND MANUFACTURING METHOD THEREOF - A magnetic disk | 03-26-2009 |
20100190035 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND PERPENDICULAR MAGNETIC RECORDING MEDIUM MANUFACTURING METHOD - [Problems] To provide a reinforcing layer between a main recording layer and a continuous layer so as to improve the S/N ratio of a magnetic recording medium and reduce the write fringing effect by the new configuration. | 07-29-2010 |
20100196741 | METHOD OF MANUFACTURING A PERPENDICULAR MAGNETIC RECORDING MEDIUM - [Problems] To provide a process for producing a magnetic recording medium, which can simultaneously realize increased high recording density, high impact resistance, and prevention of corrosion, by providing an underlayer which, even when formed at a low gas pressure, can exhibit a high level of coercive force. | 08-05-2010 |
20100203358 | Magnetic Recording Medium Substrate and Perpendicular Magnetic Recording Medium - A perpendicular magnetic recording medium comprising a pair of soft magnetic layers that are laminated via a non-magnetic layer and antiparallel-coupled to each other and that are provided between a non-magnetic substrate and a magnetic recording layer, wherein spike noise and medium noise can be positively suppressed when information recording and reproduction are carried out at high recording surface density. At least one pair of soft magnetic layers are laid and formed via a non-magnetic layer on a substrate of a non-magnetic material so that magnetic characteristics obtained by integrating the pair of soft magnetic layers have a magnetic hysteresis to thereby prevent the formation of a magnetic domain wall. | 08-12-2010 |
20100247963 | PERPENDICULAR MAGNETIC RECORDING MEDIUM - A perpendicular magnetic recording medium is used for information recording of a perpendicular magnetic recording type. The perpendicular magnetic recording medium includes a substrate, a soft magnetic layer, an underlayer, and a magnetic layer having a multilayered structure including a plurality of magnetic layers. The soft magnetic layer, the underlayer, and the magnetic layer are formed on the substrate. At least one of the magnetic layers includes CoPt magnetic grains containing oxide. The oxide includes at least one material selected from the group consisting of SiO | 09-30-2010 |