Patent application number | Description | Published |
20090257148 | MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE - There is provided a magnetic recording medium which contains a substrate in the shape of a disk, and a plural of recording bit formed on the substrate, wherein a bottom face of the recording bit is disposed so as to face the substrate, a top face of the recording bit is disposed so as to correspond to the bottom face of the recording bit, and Twb is larger than Twt, where Twb indicates a width of the bottom face with respect to a radius direction of the magnetic recording medium, and Twt indicates a width of the top face with respect to the radius direction. | 10-15-2009 |
20090296279 | MAGNETIC RECORDING MEDIUM AND INFORMATION RECORDING DEVICE - A magnetic recording medium including: a substrate; plural information recording members that are formed of a hard magnetic material on the substrate, in each of which magnetization in a direction crossing the substrate is generated and, when the information recording members pass in a predetermined traveling direction in a magnetic field for information recording, the magnetization is directed to a direction corresponding to a direction of the magnetic field and information is recorded; and a high-permeability film that is placed on an edge on a front side of the information recording members in the traveling direction and has a magnetic permeability higher than a magnetic permeability of the information recording members. | 12-03-2009 |
20090305082 | MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING AND REPRODUCING DEVICE WITH MAGNETIC RECORDING MEDIUM, AND MAGNETIC-RECORDING-MEDIUM MANUFACTURING METHOD - Although dots and servo patterns are made of the same magnetic material, the dots have a relatively low coercive force so as to allow data deletion and rewrite by a magnetic head, whilst the servo patterns have a high coercive force compared with the coercive force of the dots. The coercive force of the servo patterns is strong enough so as to eliminate the influence of shape magnetic anisotropy. | 12-10-2009 |
20090311558 | MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD - A magnetic recording medium that includes: a disc-shaped substrate; and plural magnetization retainers arranged on the disc-shaped substrate in plural circulations around a center of the substrate, each of the magnetization retainers having a length in a circumferential direction in such a manner that the length becomes longer as closer to outer circumference at least in a predetermined area, each retaining magnetization individually, each being formed of a magnetic material having axis of easy magnetization of magnetocrystalline anisotropy in a direction perpendicular to front and back surfaces of the substrate, each being filled with an ion that weakens the magnetocrystalline anisotropy of the magnetic material such that an amount of ion implantation becomes less as closer to the outer circumference in the predetermined area. | 12-17-2009 |
20100053811 | MAGNETIC STORAGE APPARATUS AND MAGNETIC STORAGE MEDIUM - A magnetic storage apparatus includes a magnetic storage medium including a recording layer, and a backing layer including a portion having a Curie temperature lower than that of the recording layer, a recording head that generates a magnetic field for recording from a side of the recording layer opposite to another side on which the backing layer is provided, and a heater unit heating at least a part of an area in proximity to a target area for recording by the recording head. | 03-04-2010 |
20100097720 | MAGNETIC RECORDING/REPRODUCING APPARATUS AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a magnetic recording/reproducing apparatus includes a magnetic head and a magnetic recording medium. The magnetic recording medium includes a recording layer formed of a hard magnetic layer and a soft magnetic layer. The hard magnetic layer has a bit width corresponding to a length of a bit island in a radial direction of the magnetic recording medium. The soft magnetic layer is arranged on the hard magnetic layer. The soft magnetic layer has a width smaller than the bit width and is arranged at a position displaced in a direction away from an off-track portion of the leading edge of the magnetic head skewed at an angle. | 04-22-2010 |