Patent application number | Description | Published |
20080292909 | MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE APPARATUS - This magnetic recording medium has a substrate, a nonmagnetic granular layer formed above the substrate and a recording layer formed on the nonmagnetic granular layer. The nonmagnetic granular layer is made of CoCr alloy with an hcp or an fcc crystal structure in which a nonmagnetic material segregates virtually-columnar magnetic grains. The magnetic recording medium and the magnetic storage apparatus in which the medium is used have improved reading/writing performances. | 11-27-2008 |
20090109579 | MAGNETIC RECORDING MEDIUM, MANUFACTURING METHOD THEREOF AND MAGNETIC STORAGE APPARATUS - A magnetic recording medium has a substrate, a first granular layer formed on the substrate, the first granular layer having a plurality of a first magnetic grains and a first oxide for separating the plurality of first magnetic grains from one another. A non-magnetic layer is formed on the first granular layer. The second granular layer is formed on the non-magnetic layer which has a plurality of second magnetic grains and a second oxide for separating the plurality of second magnetic grains from one another. The anisotropic magnetic field of the first granular layer is more intensive than that of the second granular layer. | 04-30-2009 |
20090110961 | MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC STORAGE DEVICE - A magnetic recording medium used for a hard disc drive and the like, a method of manufacturing the same, and a magnetic storage device. The magnetic recording medium that includes a substrate, a first ferromagnetic layer formed on the substrate, a non-magnetic layer formed on the first ferromagnetic layer and including a ferromagnetic element and a second ferromagnetic layer formed on the non-magnetic layer, wherein the first ferromagnetic layer and the second ferromagnetic layer are magnetically coupled through the non-magnetic layer. | 04-30-2009 |
20090142624 | MAGNETIC RECORDING MEDIUM AND A METHOD OF PRODUCING THE SAME - A method of producing a magnetic recording medium produces a medium having a magnetic recording layer disposed above a nonmagnetic intermediate layer, The nonmagnetic intermediate layer is formed by a sputtering using a target made of an oxide material. Oxygen gas or carbon dioxide gas is supplied during the sputtering in order to suppress a state where an oxygen supply becomes insufficient due to separation of oxygen atoms from the oxide material at a time of plasma generation. | 06-04-2009 |
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 |
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 |