| Patent application number | Description | Published |
|---|
| 20090135513 | MAGNETIC RECORDING MEDIUM, MAGNETIC STORAGE AND METHOD FOR REPRODUCING INFORMATION FROM MAGNETIC RECORDING MEDIUM - A magnetic recording medium includes a first magnetic layer; and a second magnetic layer formed on the first magnetic layer. The first magnetic layer and the second magnetic layer make exchange coupling therebetween and also, have their magnetizing direction in anti-parallel to one another. A net residual area magnetization of the first magnetic layer and the second magnetic layer is expressed by the following formula: |Mr | 05-28-2009 |
| 20090183985 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - One aspect of the embodiments utilizes, according to an aspect of the invention, a method of manufacturing a magnetic recording medium, which includes an intermediate layer and a granular magnetic layer as a recording layer sequentially formed on a non-magnetic substrate, includes the steps of forming the intermediate layer and forming the granular magnetic layer. The granular magnetic layer includes a plurality of magnetic particles made of a Co alloy and an oxide magnetically separating the plurality of magnetic particles by a sputtering method using a target. The target includes a Co alloy, one or more first oxides selected from a group of oxides of Si, Ti, Ta, Cr, W, and Nb, and a second oxide composed of a Co oxide. | 07-23-2009 |
| 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 |
| 20090242389 | METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM - A method for manufacturing a magnetic recording medium including a nonmagnetic substrate, an intermediate layer over the nonmagnetic substrate, and a granular magnetic layer for recording information, disposed on the intermediate layer. The method includes sputtering a Co alloy, a Ti oxide, a Si oxide and a Co oxide simultaneously to form the granular magnetic layer containing Co alloy magnetic particles and an oxide magnetically separating the magnetic particles. | 10-01-2009 |
| 20090244770 | MANUFACTURING METHOD OF MAGNETIC RECORDING MEDIUM, THE MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING APPARATUS - Aspects of the present embodiments are related to manufacturing methods of magnetic recording media. The manufacturing method of a magnetic recording medium includes a step of stacking a soft magnetic backing layer, an intermediate layer, a first recording layer having a perpendicular magnetic anisotropy, an exchange coupling force control layer including ruthenium, and a second recording layer having a perpendicular magnetic anisotropy on a substrate in order. A gas pressure of a process gas when the exchange coupling force control layer is being formed is higher than the gas pressure of the process gas when being normally used. | 10-01-2009 |
| 20090244771 | MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING DEVICE - A disclosed magnetic recording medium includes a substrate; a soft magnetic backing layer disposed on the substrate; an intermediate layer disposed on the soft magnetic backing layer; a first recording layer disposed on the intermediate layer and having perpendicular magnetic anisotropy; an exchange-coupling-energy control layer disposed on the first recording layer and made of a granular material in which oxide is added to metal including ruthenium; and a second recording layer disposed on the exchange-coupling-energy control layer, having perpendicular magnetic anisotropy, and ferromagnetically coupled with the first recording layer via the exchange-coupling-energy control layer. | 10-01-2009 |
| 20090324973 | MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING APPARATUS - A magnetic recording medium includes a substrate and a layer stack unit that has n (n being 3 or an integer greater than 3) magnetic recording layers, and (n−1) exchange coupling control layers placed in respective spaces between the n magnetic recording layers, the n magnetic recording layers and the (n−1) exchange coupling control layers being stacked on the substrate. | 12-31-2009 |
