| Patent application number | Description | Published |
|---|
| 20080239533 | METHOD OF MAGNETIC TRANSFER AND MAGNETIC RECORDING MEDIUM - The present invention provides a method of magnetic transfer comprising: an initial magnetization step of performing an initial magnetization by applying a DC magnetic field perpendicular to a disk shaped perpendicular magnetic recording medium which is formed by laminating a soft magnetic layer and a magnetic layer on a substrate; an initial magnetization cleaning step of applying an in-plane magnetic field having an intensity larger than 100 [Oe] and less than an intensity of Hn, to the perpendicular magnetic recording medium after passed through the initial magnetization step in radial direction which directed from a center to an outer of the perpendicular magnetic recording medium. After or in a time of the magnetic transfer, a magnetic cleaning may be performed by applying an in-plane magnetic field having the same intensity as the initial magnetization cleaning step in radial direction instead of the initial magnetization cleaning or in combination. | 10-02-2008 |
| 20090073593 | MASTER CARRIER FOR MAGNETIC TRANSFER, MAGNETIC TRANSFER METHOD AND MAGNETIC RECORDING MEDIUM - A master carrier for magnetic transfer includes a transfer portion on which a magnetic layer corresponding to magnetic information for transfer is formed, and a non-transfer portion forming a concave shape relatively low with respect to the transfer portion having the magnetic layer, wherein the magnetic layer of the transfer portion has perpendicular magnetic anisotropy, with residual magnetization Mr of 500 emu/cc or less, and saturation magnetization Ms of 900 emu/cc or more. CoPt can be used as a material of the magnetic layer, and use of Co | 03-19-2009 |
| 20090244747 | MAGNETIC TRANSFER MASTER CARRIER AND METHOD FOR PRODUCING THE SAME - To provide a magnetic transfer master carrier obtained by forming a perpendicular magnetic anisotropy magnetic layer over a surface of an original master which has a concavo-convex pattern, placing a base material against the formed perpendicular magnetic anisotropy magnetic layer, and separating the base material. | 10-01-2009 |
| 20090244748 | MAGNETIC TRANSFER MASTER CARRIER AND MAGNETIC TRANSFER METHOD - A magnetic transfer master carrier of the present invention includes a base material having convex portions on its surface, the convex portions being provided corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium, and a magnetic layer deposited at least on top surfaces of the convex portions, wherein when a magnetic field is applied to the magnetic transfer master carrier, the magnetic layer absorbs a magnetic flux so as to form a pattern of the magnetic field, wherein the magnetic layer includes at least two perpendicular magnetic anisotropic layers, and an antiferromagnetic coupling induction layer which is provided so as to be sandwiched in between two neighboring layers of all the perpendicular magnetic anisotropic layers, and to induce antiferromagnetic coupling therebetween. | 10-01-2009 |
| 20090244776 | MAGNETIC TRANSFER MASTER CARRIER AND MAGNETIC RECORDING MEDIUM - To provide a magnetic transfer master carrier including a base material, a concavo-convex pattern formed by arranging a plurality of convex portions on a surface of the base material, and a magnetic layer provided at least on upper surfaces of the convex portions, wherein the magnetic layer is formed by an ion gun deposition method in which a target material is irradiated with an ion beam and a layer is deposited with sputter particles sputtered from the target material. | 10-01-2009 |
| 20090244952 | ELECTRODE MASTER FOR FERROELECTRIC RECORDING AND METHOD FOR RECORDING ON FERROELECTRIC RECORDING MEDIUM - The present invention provides an electrode master for ferroelectric recording that records information on a ferroelectric recording medium in which the direction of polarization of a ferroelectric material has been unified in one direction by applying a voltage thereto, based on the direction of polarization of the ferroelectric material by applying voltage pulses to the ferroelectric recording medium, the electrode master including: an electroconductive base material; a plurality of electrode convexes provided on a surface of the electroconductive base material so as to correspond to information to be recorded on the ferroelectric recording medium; and an electrode terminal conducted to each of the electrode convexes and provided on the electroconductive base material. | 10-01-2009 |
| 20090251814 | MAGNETIC TRANSFER MASTER CARRIER, MAGNETIC TRANSFER METHOD, AND MAGNETIC RECORDING MEDIUM - The present invention provides a magnetic transfer master carrier which forms a magnetic pattern corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium when a magnetic field is applied to the perpendicular magnetic recording medium, with the magnetic master carrier and the perpendicular magnetic recording medium closely attached to each other, the carrier including:
| 10-08-2009 |
| 20090303627 | MAGNETIC TRANSFER MASTER CARRIER, MAGNETIC TRANSFER METHOD, AND MAGNETIC RECORDING MEDIUM - A magnetic transfer master carrier including a base material having, in its surface, convex portions arranged correspondingly to a pattern of information to be recorded on a perpendicular magnetic recording medium, and a magnetic layer having perpendicular magnetic anisotropy, the layer being provided on top and side surfaces of the convex portions, wherein the magnetic transfer master carrier forms a magnetic field pattern corresponding to the pattern of the information when a magnetic field is applied thereto. | 12-10-2009 |
