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| Number | Title | Issue Date |
| 7355951 | High density data recording/reproduction method utilizing electron emission and phase change media, and data recording system adopting the same, and media for the system A rapid data recording/reproducing method, a data recording system adopting the same, media for the system, and a tracking method, wherein the recording/reproducing method includes preparing media having a data recording layer in which a phase change is generated th... | 04/08/2008 |
| 7353528 | Optical recording medium and its manufacturing method A multi-layered film made of sequentially stacked first dielectric layer, recording layer, record-assist layer, second dielectric layer and first reflection layer on a disc substrate having a concavo-convex structure at least on one surface thereof. An ultraviolet-s... | 04/01/2008 |
| 7289285 | Information storage systems An information storage apparatus includes a storage media including a plurality of information tracks. Each storage medium has a head assembly having a substantially planar surface and a plurality of read/write heads positioned in registry with the information track... | 10/30/2007 |
| 7277364 | Magneto-optical recording medium device A magneto-optical recording medium device of the present invention optimizes a magnetic field forming the front mask and a magnetic field forming the rear mask by use of a single bias magnetic field generator, by shifting the peak position of the bias magnetic field... | 10/02/2007 |
| 7260886 | Fastening a magnetic disk to a hub structure Embodiments of the invention provide a clamping mechanism capable of clamping a magnetic disk by an accurate fastening force. In one embodiment, a magnetic disk fastening method includes the steps of: mounting a magnetic disk on a hub structure, setting a thin plate... | 08/28/2007 |
| 7221250 | Coil component and method of manufacturing the same The invention relates to a coil component used as a major component of a common mode choke coil or transformer and a method of manufacturing the same, and the invention is aimed at providing a compact and low-profile coil component having a high common mode filterin... | 05/22/2007 |
| 7201117 | Method and apparatus for reducing risk that a thrown toy will injure an animal A method and apparatus for reducing the risk that a thrown toy will injure an animal. The apparatus consists of a toy which when thrown bounces erratically, which compressively elastically deforms, which includes a soft fabric outer surface that compresses to absorb... | 04/10/2007 |
| 7161755 | Increasing areal density in magnetic recording media A magnetic recording medium is made of a thin film medium that includes magnetic grains. At least one of a magnetization density of the magnetic grains, a crystalline anisotropy field of the magnetic grains, a thickness of the recording medium, an average diameter o... | 01/09/2007 |
| 7142498 | Recorded information reproducing apparatus It is an object to provide a recorded information reproducing apparatus that allows to eliminate crosstalk from an adjacent track correctly, even from a recording medium having both a recorded area in which information data are recorded and an unrecorded area. In or... | 11/28/2006 |
| 7113453 | Method for recording and reproduction on a magneto-optical recording medium A magneto-optical recording medium and a method for recording and reproduction thereon are provided in order to reproduce information recorded by multi-valued recording at a high S/N ratio. Disclosed is a magneto-optical recording medium including two magnetic layer... | 09/26/2006 |
| 7102969 | Multi-level optical recording medium reproducing method and reproducing device A reproduction method for a multi-level optical recording medium according to the present invention rotates an optical recording medium, on which recording data has been recorded according to a multi-level recording method which sets several levels for light reflect... | 09/05/2006 |
| 7054082 | Magnetic transfer method for a high-density magnetic recording medium An accurate magnetic transfer to a high-density slave medium having two magnetic layers and utilizing antiferromagnetic coupling is performed. By applying a first magnetic field that causes both the first and second magnetic layers of the magnetic layer of a slave m... | 05/30/2006 |
| 7050361 | Magneto-optical storage medium and optical disk drive A magneto-optical storage medium that protects against the effects of cross-talk, making it possible to further reduce the level of track density, and which also makes it possible to conduct high-density recording/playback with a reduced magnetic field for erasure a... | 05/23/2006 |
| 6904002 | Magneto-optical reproducing method using a plurality of different reproducing beams A magneto-optical recording medium has magneto-optical recording layers (11, 12, 13) and reproducing layers (21, 22, 23). The information recorded in the reproducing layers are reproduced by means of reproducing light beams (31, 32, 33) of diffe... | 06/07/2005 |
| 6834026 | Method for thermally-assisted recording on a magnetic recording disk A magnetic recording medium for thermally-assisted recording is a bilayer of a high-coercivity, high-anisotropy ferromagnetic material like FePt and a switching material like FeRh or Fe(RhM) (where M is Ir, Pt, Ru, Re or Os) that exhibits a switch from antiferromagn... | 12/21/2004 |
| 6697304 | Method and apparatus for recording with a magneto-optical recording medium A magneto-optical recording medium includes a recording layer and a reproducing layer respectively formed by magnetic layers on a substrate. A record magnetic domain is formed within the recording layer by using a magnetic head, which is transferred into ... | 02/24/2004 |
| 6501707 | Method and apparatus for recording with a magneto-optical recording medium applying one period of an alternating magnetic field to a unit domain length A magneto-optical recording medium includes a recording layer and a reproducing layer respectively formed by magnetic layers on a substrate. A record magnetic domain is formed within the recording layer by using a magnetic head, which is transferred into ... | 12/31/2002 |
| 6262949 | Multilayer resonance device and magneto-optical recording medium with magnetic center layer of a different thickness than that of the components of the reflecting layers A multilayer resonance device of the invention includes regularly stacked layers each formed by alternately stacking a magnetic substance and a dielectric substance with thickness regularity, and an irregular layer including a magnetic substance, having a... | 07/17/2001 |
| 6246640 | Magneto-optical recording medium capable of recording multiple value signals On a surface of a transparent substrate 1 having a preformat pattern 2 formed thereon are laminated a first recording layer 4 in which a recording state exists in one different magnetic field region of an applied external magnetic field and a second recor... | 06/12/2001 |
| 6101153 | Magnetic head capable of generating multi-stepped external magnetic fields for magneto-optical recording device An optomagnetic recording and reproducing system has been developed which demonstrates superior performance when used with multilayer recording substrates. The system features an optical head and magnetic head disposed opposite to each other on different ... | 08/08/2000 |
| 6061307 | Magneto-optical recording medium having a plurality of magnetic layers On a surface of a transparent substrate 1 having a preformat pattern 2 formed thereon are laminated a first recording layer 4 in which a recording state exists in one different magnetic field region of an applied external magnetic field and a second recor... | 05/09/2000 |
| 5923625 | Magneto-optical recording medium and method for recording and reproduction thereon A magneto-optical recording medium and a method for recording and reproduction thereon are provided in order to reproduce information recorded by multi-valued recording at a high S/N ratio. Disclosed is a magneto-optical recording medium including two mag... | 07/13/1999 |
| 5623458 | Method for reproducing information data recorded on a magneto-optical device having plural magnetic layers A method for reproducing information recorded on a magneto-optical recording medium that includes a transparent substrate, a first magnetic layer laminated on the transparent substrate, a second magnetic layer laminated on the first magnetic layer, and a ... | 04/22/1997 |
| 5467237 | Sliding type magnetic head for magneto-optical recording A sliding type magnetic head for magneto-optical recording which can prevent a jump thereof caused by a variation in profile of a surface of a disk and can realize reduction of a load force and provide a countermeasure against an external impact. A magnet... | 11/14/1995 |
| 5432761 | Method and apparatus for magneto-optical recording of a plurality of discrete levels The invention provides a medium and a method suitable for magneto-optical and multiple recording. The medium includes alternate thin layers of a magnetic rare-earth metal and an electrically conductive material, and has "magnetic frozen state" at low temp... | 07/11/1995 |
| 5402293 | Magneto-optical head having a thin film coil recessed into a magnetic substrate A magneto-optical head formed of a magnetically permeable substrate in which an annular recess is formed in a planar surface of the substrate and a plurality of thin film windings are deposited in the recess to make up the coil windings of the head.... | 03/28/1995 |
| 5359579 | Magneto-optical recording method and medium for recording three-value information A magneto-optical recording medium which allows overwriting of three-value information and sufficiently satisfies read/write requirements necessary for practical use and a magneto-optical recording method which allows writing and reading out of three-valu... | 10/25/1994 |
| 5229902 | Circuitry for reversing a magnetic field A circuit for reversing a magnetic field in which a bifilar coil is provided with a series of two oppositely-wound windings that are connected together at one end to form a junction. A source of current is connected in series with an inductive resistor, a... | 07/20/1993 |
| 5163031 | Method of recording tetra-value signal on magneto-optical recording medium with plural magnetic layers A method for recording a signal on a magneto-optical recording medium comprising a first magnetic layer exhibiting a vertical magnetic anisotropy and a second magnetic layer exchange-coupled to the first magnetic layer and having a higher Curie point and ... | 11/10/1992 |
| 4938915 | Method of recording at least ternary data on optomagnetic recording medium having a plurality of magnetic layers A method of recording at least ternary data on an optomagnetic recording medium having at least a first magnetic layer, and a second magnetic layer whose Curie temperature is higher than that of the first magnetic layer and which is capable of being magne... | 07/03/1990 |
| 4890178 | Magnetic bias coil for a magneto-optical recording apparatus An electromagnetic bias coil for applying a magnetic bias field to a recording bit of a magneto-optical recording disk apparatus includes a yoke made of soft magnetic material, such as soft iron. The yoke surrounds an outer perimeter surface and a bottom ... | 12/26/1989 |
