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| Number | Title | Issue Date |
| 7423939 | Method for manufacturing magneto-optical recording medium A method for manufacturing a magneto-optical recording medium in which reading of recorded information is performed through domain wall displacement in a reproduction layer is provided, in which magnetic separation of groove side-wall portions is performed more reli... | 09/09/2008 |
| 7235313 | Magneto-optical recording medium, method of manufacturing magneto-optical recording medium, method of recording on magneto-optical recording medium, and method of reproduction from magneto-optical recording medium A magneto-optical medium has a recording layer having a plurality of columns extending in a lamination direction, and a reproduction layer which is placed below the recording layer and which functions as a nucleus for the columns. ... | 06/26/2007 |
| 7200072 | Domain wall displacement magneto-optical recording and reproducing apparatus A recording/reproducing apparatus for a domain-wall-displacement magneto-optical recording medium with good format efficiency, capable of providing a good reproduction signal and securing a maximum recording region for a user is provided which comprises a recording ... | 04/03/2007 |
| 6893746 | Magnetic recording medium with high thermal stability, method for producing the same, and magnetic recording apparatus A magnetic recording medium comprises an information-recording film and a ferromagnetic film on a substrate. The information-recording film is composed of, for example, an amorphous ferrimagnetic material having perpendicular magnetization. Further, the ferromagneti... | 05/17/2005 |
| 6844083 | Magneto-optical recording medium possessing a magnetic assist layer A magneto-optical recording medium has a configuration such that information recorded can be read from a region smaller than a beam spot by applying an external magnetic field and directing a light beam in reproducing. The magneto-optical recording medium includes a... | 01/18/2005 |
| 6534162 | Magneto-optical recording medium A magneto-optical recording medium includes at least: a reproducing magnetic layer composed at least of Gd and Co showing an in-plane magnetization state at room temperature and a transition to a perpendicular magnetization state at temperatures of not lo... | 03/18/2003 |
| 6018511 | Magneto-optical recording medium and readout method of the same A magneto-optical recording medium includes at least a readout magnetic film and a recording magnetic film on a substrate, wherein information is recorded onto the recording magnetic film through magnetization of the recording magnetic film thereby formin... | 01/25/2000 |
| 6010780 | Magneto-optical memory medium A magneto-optical memory medium is provided, on a substrate, with a first magnetic layer, which shows in-plane magnetization at room temperature and perpendicular magnetization above a certain temperature, and a second magnetic layer, which shows perpendi... | 01/04/2000 |
| 5989705 | Magneto-optical recording medium A magneto-optical recording disk includes a recording layer for recording information as a mark and a reproduction layer, laminated with the recording layer, to which magnetization direction of the recording layer is transferred at high temperatures, wher... | 11/23/1999 |
| 5903525 | Coil for use with magneto-optical head A planar micro-coil is provided for use with an optical head. The optical head is preferably a flying magneto-optical head. The micro-coil cooperates with a yoke assembly so to as to permit an optimal magnetic flux density to be formed at a surface of a m... | 05/11/1999 |
| 5824426 | Magneto-optical recording medium A magneto-optical recording medium includes a readout layer having in-plane magnetization at room temperature and in which a transition occurs from in-plane magnetization to a perpendicular magnetization when temperature rises, and a recording layer for s... | 10/20/1998 |
| 5822282 | Magneto-optical recording medium having a plurality of magnetic layers for use in light modulation technique A magneto-optical recording medium has at least a substrate, a first magnetic layer, a second magnetic layer, and a first interface layer provided between the first and second magnetic layers. The first magnetic layer exhibits a perpendicular magnetic ani... | 10/13/1998 |
| 5771211 | Magneto-optical recording media having a reading layer with a specified range of temperature coefficients of a kerr rotation angle The magneto-optical recording medium, including a transparent polycarbonate substrate, an interference layer made of SiN, a reading layer made of GdFeCo, a recording layer made of TbFeCo, an oxidation-preventing layer made of SiN, a irradiation layer made... | 06/23/1998 |
| 5536570 | Overwrite capable magneto-optical recording medium having three magneto-optic layers A magneto-optical recording medium capable of overwriting by light modulation comprises a substrate, a first magnetic layer having a curie point T1 and a coercive force H1, a second magnetic layer having a curie point T2 a... | 07/16/1996 |
| 5458987 | Multilayered magnetooptical recording medium A magnetooptical recording method for recording data using a bit having upward-magnetization and a bit having downward-magnetization on a recording layer of a magnetooptical recording medium comprises the steps of using, as the medium, a multilayered magn... | 10/17/1995 |
| 5414678 | Magneto-optic recording medium having two recording layers, and drive for same A magneto-optic recording medium having two magneto-optic recording layers having different Curie temperatures. The magneto-optic layers must be capable of existing in two different magnetic states: a first magnetic state in which both magneto-optic layer... | 05/09/1995 |
| 5329505 | System and method for overwriteable magneto-optical recording A system and method for overwriteable magento-optical recording comprises a medium having a data layer and a reference layer. The medium is heated with a laser pulse of short duration which causes a temperature gradient between the data layer and the refe... | 07/12/1994 |
| 5208792 | Recording and reproducing apparatus using opto-magneto media An apparatus is provided for recording and reproducing information signals on an opto-magnetic disk at a high speed using plural light beams. The phase relation between the information signals is fixed when they are simultaneously recorded and reproduced ... | 05/04/1993 |
| 5143798 | Magneto-optical recording medium having double magnetic layers including a light rare earth element and satisfying a specified condition involving the product of the thickness and magnetization saturation of said layers A magneto-optical recording medium including a first magnetic layer (having film thickness t1 and saturation magnetization Ms1) and a second magnetic layer (having film thickness t2 and saturation magnetization Ms2) which are respectively made from a rare... | 09/01/1992 |
| 5094925 | Opto-magnetic recording medium An opto-magnetic recording medium having a perpendicularly magnetized film of a dual layer structure comprising a first layer composed of a rare earth-transition metal amorphous thin alloy film and a second layer composed of a rare earth-transition metal ... | 03/10/1992 |
| 4991160 | Integrated optical device for magneto-optical recording and reading head An integrated optical device for magneto-optical recording and/or reading employs elements that may be fabricated on a substrate using semiconductor manufacturing technology. Such elements include, but are not limited to, a system of waveguides for transm... | 02/05/1991 |
| 4910622 | Over write capable magnetooptical recording medium Over Write Capable Magnetooptical Recording Medium, Recording Method and Apparatus Using the Same. The recording medium in which the direction of an initial field Hini. is the same as that of a bias field Hb (Classes 1, 2, and 8 in Table 1), and which sat... | 03/20/1990 |
| 4686661 | Information processing apparatus used in a magneto-optical information recording-reproducing apparatus and having improved erasing capability An information processing apparatus for effecting the erasure of information recorded on a recording medium has wide area erasing means for erasing the recording information of a wide area recorded on the recording medium, and narrow area erasing means fo... | 08/11/1987 |
