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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 |
| 7292525 | Optical information recording method and apparatus for multiple recording layer medium A plurality of types of recording pulse control rules for which the recording pulse waveform is determined according to the information signals to be recorded are stored in advance in an optical disk. When recording to the optical disk, information is recorded using... | 11/06/2007 |
| 7277363 | Magneto-optical recording or reproducing device A magneto-optical recording or reproducing device having an information erasing means for erasing information or data recorded on a magneto-optical recording medium. According to the invention, the information erasing means comprises an erasing magnet having a field... | 10/02/2007 |
| 7180831 | Magneto-optical recording medium having a recording layer of columnar structure It is an object of the present invention to provide a magneto-optical recording medium including a recording film having at least a reproduction layer, an intermediate layer, and a recording layer, on an optical disk substrate, wherein the recording film is a magnet... | 02/20/2007 |
| 7151716 | Magneto-optical recording medium having a transfer control layer A magneto-optical recording medium, including a recording layer, a transfer control layer magnetically coupled to the recording layer, and a reproduction layer. The recording layer includes a recording magnetic domain in which information is recorded by a magnetizat... | 12/19/2006 |
| 7126886 | Magneto-optical recording medium and method for producing the same According to the present invention, a light beam is radiated to an area between recording tracks while the intensity of a magnetic field from the outside to a magneto-optical recording medium is suppressed to 50 Oe or less, whereby magnetic anisotropy formed between... | 10/24/2006 |
| 7126884 | Magneto-optical recording medium having multiple magnetic layers In a magneto-optical recording medium, a first magnetic layer is made of a material using a Gd—Fe film or a Gd—Fe—Co film as a base so that a magnetic field normalized based on saturation magnetization of a magnetic domain wall driving field can be smaller tha... | 10/24/2006 |
| 7060373 | Magneto-optical recording medium and signal reproduction method A magneto-optical recording medium includes a first magnetic layer (reproduction layer), a second magnetic layer (control layer), a third magnetic layer (blocking layer), and a fourth magnetic layer (recording layer) having respective Curie temperatures TC1 | 06/13/2006 |
| 7035138 | Magnetic random access memory having perpendicular magnetic films switched by magnetic fields from a plurality of directions A magnetization reversal method is a method of applying an external magnetic field to a magnetoresistive film, in which the magnetoresistive film has a structure wherein a nonmagnetic film is placed between magnetic films with an easy axis of magnetization along a p... | 04/25/2006 |
| RE38922 | Magneto-optical recording medium and method for reproducing information from a magneto-optical recording medium having three layers A magnetooptical recording medium has a first magnetic layer which is an in-plane magnetization film at both room temperature and high temperatures and changed to a perpendicular magnetization film at intermediate temperatures, and a second magnetic layer which is c... | 12/20/2005 |
| 6949302 | Magneto-optical recording medium having a reproducing layer composed to control movement of domain walls therein A magneto-optical recording medium includes at least a first magnetic layer, a second magnetic layer and a third magnetic layer which are layered in this order, the first magnetic layer being formed of a perpendicularly magnetized film having a relatively small wall... | 09/27/2005 |
| 6950261 | Magnetic pattern forming method, magnetic pattern forming apparatus, magnetic disk, and magnetic recording apparatus A magnetic pattern forming apparatus, which is designed to form a desired magnetic pattern on a magnetic disk having a magnetic layer on a substrate, is made up of a mask having a pattern identical or similar to the desired magnetic pattern, a projection optical sys... | 09/27/2005 |
| 6894954 | Domain wall-displacement type magneto-optical medium and reproducing method for the same A magneto-optical recording medium has a domain wall displacement layer, a recording layer for accumulating information and a switching layer arranged between said domain wall displacement layer and said recording layer and having a Curie temperature lower than thos... | 05/17/2005 |
| 6853606 | Magneto-optical storage medium capable of transferring magnetic domain from recording layer to reproducing layer A magneto-optical recording medium includes a substrate and a reproducing layer and a recording layer provided on the substrate. A recording magnetic domain is provided in the recording layer by heating the recording layer by irradiation with light and applying a re... | 02/08/2005 |
| 6826131 | Magneto-optical recording medium having multiple magnetic layers A multilayer film including a first magnetic layer, a second magnetic layer, and a third magnetic layer in the stated order is formed so that a Curie temperature TC2 of the second magnetic layer is set to be lower than a Curie temperature TC1 o... | 11/30/2004 |
| 6811889 | Magneto-optical recording medium having a GDFECO readout magnetic film A magneto-optical recording medium including a recording layer for recording information and a substrate for supporting the recording layer is disclosed. The recording layer includes: a recording magnetic film for recording the information, the recording magnetic fi... | 11/02/2004 |
| 6808823 | Magneto-optical recording medium and manufacturing method therefor A magneto-optical recording medium including a magnetic recording layer for recording information and a magnetic reproducing layer provided on the magnetic recording layer for reading information. The magnetic reproducing layer is separated into a first reproducing ... | 10/26/2004 |
| 6802073 | Magneto-optical recording medium Disclosed are magneto-optical recording media including at least a reflection layer, a recording layer and a dielectric layer laminated on a substrate in this order, wherein the thickness of the dielectric layer is not less than 140 nm or wherein the dielectric laye... | 10/05/2004 |
| 6770387 | Magneto-optical recording medium and method of reproducing the same A magneto-optical recording medium comprising four magnetic layers including a mask layer, a reproduction layer, an intermediate layer and a recording layer, wherein the reproduction layer and the recording layer each have a direction of easy magnetization extending... | 08/03/2004 |
| 6767656 | Magneto-optical recording medium and method of reproducing the same A magneto-optical recording medium comprising four magnetic layers including a mask layer, a reproduction layer, an intermediate layer and a recording layer, wherein the reproduction layer and the recording layer each have a direction of easy magnetization extending... | 07/27/2004 |
| 6721238 | Magneto-optical recording medium having multiple magnetic layers capable of reducing reproducing laser power A magneto-optical recording medium for recording and reproducing carriers by laser beam irradiation includes a first magnetic layer which is magnetized in the in-plane direction at room temperature and is perpendicularly magnetized at a predetermined temperature T | 04/13/2004 |
| 6678219 | Magneto-optical recording medium having a magnetic flux formed layer Featured is a magneto-optical storage medium including: a first magnetic layer constituted by a perpendicularly magnetized film; a second magnetic layer constituted by a perpendicularly magnetized film so as to be exchange coupled to the first magnetic la... | 01/13/2004 |
| 6671233 | Magneto-optical recording medium and reproduction method therefor A magneto-optical recording medium comprises, on a substrate, a dielectric layer, a GdFeCo reproducing layer, a non-magnetic layer, and a TbFeCo recording layer. Upon reproduction, a DC magnetic field Hex is applied in the recording direction, and a repro... | 12/30/2003 |
| 6671234 | Magneto-optical storage media and method of reproducing the same A magneto-optical storage medium includes: a reproduction magnetic layer exhibiting in-plane magnetization at room temperature and changing to perpendicular magnetization at a critical temperature or higher; first and second in-plane magnetized layers wit... | 12/30/2003 |
| 6660404 | Magnetooptical recording medium including a connection layer that is non-magnetic by itself at room temperature but can be induced to exhibit magnetism when in contact with a magnetic layer A magnetooptical recording medium comprising at least a reproduction layer, an intermediate layer, a connection layer and a recording layer, wherein the reproduction layer and intermediate layer have a slant magnetic direction in a non-magnetic field, and... | 12/09/2003 |
| 6630252 | Magneto-optical recording medium comprising four magnetic layers An MO disk includes a readout layer, an intermediate layer and a recording layer each of which is made of a rare earth-transition metal amorphous material. The MO disk also includes a fourth magnetic layer formed on the recording layer and made of a rare ... | 10/07/2003 |
| 6463015 | Method of reproducing information on a magneto-optical recording medium for achieving super resolution reproduction of high resolution recorded information A magneto-optical recording medium of the present invention has a recording layer made of a perpendicular magnetization film, and a readout layer which is in an in-plane magnetization state at room temperature and changes into a perpendicular magnetizatio... | 10/08/2002 |
| 6430115 | Magneto-optical recording device with three distinct layers A reproducing layer having perpendicular magnetization in a single layer, an in-plane magnetic layer, and a recording layer having perpendicular magnetization are formed in this order. When the reproducing layer, the in-plane magnetic layer, and the recor... | 08/06/2002 |
| 6343052 | Magneto-optical medium having film with rounded upper corner and thickness decreasing to the side end on lands The present invention provides a domain wall displacement-type magnetooptical recording medium effective for decreasing jitter, in which a conventional herringbone recording mark can be changed to a linear mark. The magnetooptical recording medium of the prese... | 01/29/2002 |
| 6248439 | Magneto-optical recording medium and reproducing method for information recorder on the medium A magneto-optical recording medium capable of perfectly masking a mark adjacent to a mark to be reproduced thereby improving a reproduction output. The magneto-optical recording medium includes a transparent substrate, a magnetic reproducing layer laminat... | 06/19/2001 |
| 6226234 | Magneto-optic recording medium and reproducing method for reproducing magnetic domain in enlarged form on a reproducing layer A magneto-optic recording medium includes a second auxiliary magnetic film, a first auxiliary magnetic film and a magneto-optic recording film on a substrate. The auxiliary magnetic films change from in-plane magnetization to vertical magnetization at cri... | 05/01/2001 |
| 6128254 | Magneto-optical recording medium and reproducing method for information recorded on the medium A magneto-optical recording medium composed of a plurality of magnetic layers including a rare earth metal and a transition metal as main components. The magneto-optical recording medium includes a magnetic reproducing layer having an easy axis of magneti... | 10/03/2000 |
| 6125083 | Magneto-optical recording method and medium comprising three layers, whose middle layer has a lower curie temperature than the other layers In a magneto-optical recording medium, a first magnetic layer for participating in reproduction of information is laminated on a substrate. A second magnetic layer for storing information is laminated on the first magnetic layer. A third magnetic layer ha... | 09/26/2000 |
| 6103407 | Magneto-optical recording medium and method of using same A magneto-optical recording medium which is adapted to realize a partial ROM with remarkable facility in providing software. The magneto-optical recording medium comprises a transparent substrate, a volatile magnetic recording layer formed on the transpar... | 08/15/2000 |
| 6027825 | Magnetooptical recording medium on which high-density information can be recorded and method of reproducing the recorded information A magnetooptical recording medium includes a first magnetic layer, a second magnetic layer whose Curie temperature is lower than that of the first magnetic layer, and a third magnetic layer, comprising a vertically-magnetizing film, whose Curie temperatur... | 02/22/2000 |
| 6020079 | Magneto-optical recording medium and reproducing method for information recorded on the medium A magneto-optical recording medium capable of performing magnetically induced super resolution reproduction by perfectly masking a mark adjacent to a mark to be reproduced. The magneto-optical recording medium includes a transparent substrate, a magnetic ... | 02/01/2000 |
| 5945228 | Magneto-optical recording medium and method for reproducing thereof A magneto-optical recording medium comprises: a readout magnetic film which is perpendicular magneto-anisotropy in a temperature range higher than room temperature and less than a second temperature Tsw2, and is in-plane magneto-anisotropy in a temperatur... | 08/31/1999 |
| 5889740 | Magneto-optical recording medium and magneto-optical recording method Featured is a magneto-optical recording medium including a first magnetic layer, a second magnetic layer, a third magnetic layer and a fourth magnetic layer formed one on another in this order. The first, second, third and fourth magnetic layers have Curi... | 03/30/1999 |
| 5863649 | Magneto-optical recording medium In a magneto-optical recording medium including a reading-out layer, which is in an in-plane magnetization state at a room temperature and in a perpendicular magnetization state when the temperature rises, and a recording layer, which is in a perpendicula... | 01/26/1999 |
| 5790513 | Magneto-optical recording medium capable of super resolution reproduction and information reproduction method using the same A magneto-optical recording medium includes a first magnetic layer which becomes an in-plane magnetization film at room temperature, and a perpendicular magnetization film at a temperature between room temperature and the Curie temperature of the layer, a... | 08/04/1998 |
