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| Number | Title | Issue Date |
| 7433276 | Domain wall displacement detection system magneto-optical recording medium and its manufacturing method A domain wall displacement detection (DWDD) system magneto-optical recording medium forms a land 3 and a groove 4 as signal recording areas. When a domain wall displacement improvement is changed by irradiating annealing light La on a boundary wall sur... | 10/07/2008 |
| 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 |
| 7399539 | DWDD-type magneto-optic recording medium including buffer regions between recording track regions and method of producing the same A magneto-optic recording medium has a stacked structure composed of a memory layer, a domain wall displacement layer having domain wall-resistant magnetism smaller than the memory layer, and a switching layer having a lower Curie temperature than these layers inter... | 07/15/2008 |
| 7394750 | Information recording medium, and information reproducing apparatus and method A record mark is formed on a master disc DS. The record mark is formed substantially along a spiral standard locus, but a record mark position is displaced in a direction crossing the spiral standard locus according to record data. A wobble is formed such that the a... | 07/01/2008 |
| 7359291 | Magneto-optical storage medium capable of recording plural rows of marks on each track An optical disk recording method of recording data on an optical disk by applying laser light to a track of the optical disk, includes the steps of a) driving a plurality of laser light sources in sequence in a time division manner, and applying a light flux to one ... | 04/15/2008 |
| 7339764 | Method of designing patterned magnetic recording medium and patterned magnetic recording medium A method of designing a patterned magnetic recording medium including a magnetic film with perpendicular magnetic anisotropy which is patterned into dots form includes steps of setting values to dot pattern periods Px and Py, a thickness “tâ€... | 03/04/2008 |
| 7330404 | Near-field optical transducers for thermal assisted magnetic and optical data storage An optical transducer comprises an optical element for directing an electromagnetic wave to a focal region and a metallic nano-structure having a longitudinal axis substantially parallel to an electric field of the electromagnetic wave, the metallic nano-structure b... | 02/12/2008 |
| 7295404 | Magnetic recording medium for perpendicular recording and magnetic storage apparatus using the same A perpendicular magnetic recording medium at least comprises a perpendicular magnetic recording layer and a backing layer backing the perpendicular magnetic recording layer. The backing layer has an in-plane magnetization and is formed of a ferrimagnetic material ha... | 11/13/2007 |
| 7260822 | Optical data storage medium and use of such a medium The optical data storage medium (20) has a substrate (1) with a surface area having tracks (4) of marks representing stored information. The information is readable by means of a scanning radiation beam (10). A reflective layer (2)... | 08/21/2007 |
| 7257076 | Magneto-optical recording medium A magneto-optical recording medium in which the inside of grooves formed along recording tracks is a signal recording area in groove recording, and the domain wall displacement detection method is employed; and a curvature radius R1, in the cross section perp... | 08/14/2007 |
| 7197005 | Optical recording method and medium In an optical recording medium including a grooved light-transparent substrate, a phase change recording layer, a dielectric layer and a reflective layer, recording is carried out by irradiating a laser beam to the recording layer through an objective lens in an opt... | 03/27/2007 |
| 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 |
| 7177262 | Reproducing system and corresponding information recording medium having wobbled land portions An information recording medium is at least composed of a substrate having a microscopic pattern constituted by a continuous substrate of grooves formed with a groove portion and a land portion alternately, a recording layer formed on the microscopic pattern for rec... | 02/13/2007 |
| 7158346 | Heat assisted magnetic recording film including superparamagnetic nanoparticles dispersed in an antiferromagnetic or ferrimagnetic matrix Heat assisted magnetic recording systems with composite recording films are disclosed. The magnetic recording films include superparamagnetic nanoparticles dispersed in an antiferromagnetic or ferrimagnetic matrix. The matrix provides antiferromagnetic coupling with... | 01/02/2007 |
| 7120106 | Optical disc recording and/or reproducing apparatus and aberration adjustment method The astigmatic aberration in an optical system is to be adjusted. Specifically, in an optical disc device on which can be selectively loaded a first optical disc having a first index of double refraction or a second optical disc having a second index of double refra... | 10/10/2006 |
| 7095701 | Optical disc recording and/or reproducing apparatus and aberration adjustment method The astigmatic aberration in an optical system is to be adjusted. Specifically, in an optical disc device on which can be selectively loaded a first optical disc having a first index of double refraction or a second optical disc having a second index of double refra... | 08/22/2006 |
| 7090933 | Magneto-optical recording medium including a soft magnetic layer, a protective layer and a silane coupling agent layer, in this order The invention is a magneto-optical recording medium characterized by containing at least a soft magnetic layer, a protective layer, a resin layer having a servo pattern formed thereon, a reflecting film, a lower dielectric material film, a recording film, an upper d... | 08/15/2006 |
| 7012857 | Magneto optical recording medium having a multilayer recording film of different thickness A magneto optical recording medium capable of stable recording and readout using a DWDD system is provided. The magneto optical recording medium of the present invention comprises an optical disk substrate and a multilayer recording film comprising essentially a rea... | 03/14/2006 |
| 6999398 | Method and apparatus for recording information on information recording medium Information is recorded on an information recording medium such as a magneto-optical recording medium, having two recording tracks arranged alternately, typically in a double spiral manner. The two recording tracks have different recording characteristics and inform... | 02/14/2006 |
| 6982127 | Information recording medium, and apparatuses for reproducing, recording, and recording and reproducing thereof, and methods for reproducing, recording, and recording and reproducing thereof An information recording medium comprises a substrate, a second recording layer, a second light transmitting layer, a first recording layer for recording different information from that to be recorded in the second recording layer, and a first light transmitting lay... | 01/03/2006 |
| 6982944 | Optical recording medium having relation between groove depths and pit depths An optical information-recording medium having in-groove pits, which is excellent in recording and reproduction characteristics and tracking characteristics, is provided. A method for producing the optical information-recording medium is also provided. Further, a st... | 01/03/2006 |
| 6980490 | Optical disk and manufacturing method for the same An optical disk is made of tracks that are magnetically separated from one another by scanning a focused light beam over lands between tracks at a predetermined power and annealing to lower the magnetic anisotropy of a magnetic layer on the lands, and is provided wi... | 12/27/2005 |
| 6975564 | Magneto-optical recording medium for use in domain wall displacement detection system, and method for producing the same An optical disk of the present invention includes a substrate and a recording layer disposed above the substrate, and reproduces an information signal by a DWDD system, using light incident from the substrate side. The optical disk further includes a first dielectri... | 12/13/2005 |
| 6947405 | Cellular system with cybercells A local site communication system, including a broadband connection between the local site and an internet, a wireless local site network in the local site and communicating data between the broadband connection and the mobile terminal when the mobile terminal is lo... | 09/20/2005 |
| 6925033 | Magnetic head with a permanent-magnet layer structure For high-resolution and low bit-error-rate MAMMOS readout, a magnetic head includes a flat magnetic coil (1) having a coil layer structure (3a, 3b) having an electrically conductive winding (5a, 5b), and... | 08/02/2005 |
| 6909685 | Optical disk device having light converging means which marks plural signal mark positions in a direction substantially perpendicular to tracks An optical disk device has a light source which emits light; and light converging means of, in each of signal mark forming regions, each of lands, or each of grooves of an optical disk, converging the light from the light source onto a signal surface of the optical ... | 06/21/2005 |
| 6853513 | Magnetic scanning system A scanning device for scanning data-carrying disks. The disks include a magnetisable layer to and from which data is written and read using a magnetic transducer, such as a Giant Magneto-Resistive (GMR) transducer. Positioning of the transducer over a data track is ... | 02/08/2005 |
| 6804175 | Thermally assisted magnetic recording medium having non-recording areas A storage medium for thermally-assisted magnetic recording has a recording layer which substantially parallel tracks for recording information. The recording layer includes a series of recording regions, each region comprising a plurality of tracks for magnetically ... | 10/12/2004 |
| 6801479 | Method for recording plural rows of record marks in one track in magneto-optical recording device An optical disk recording method of recording data on an optical disk by applying laser light to a track of the optical disk, includes the steps of a) driving a plurality of laser light sources in sequence in a time division manner, and applying a light flux to one ... | 10/05/2004 |
| 6773782 | Magnetic memory medium having a magnetic film laminated on a substrate and a non-magnetic film formed thereon, and method of manufacturing the same The surface of a disk medium includes a substrate whose surface includes grooves and lands. A non-magnetic underlayer and a magnetic recording layer are formed on the substrate. Smoothing non-magnetic film fills the grooves, which are covered with the non-magnetic u... | 08/10/2004 |
| 6759137 | Opto-magnetic recording medium with a garnet ferrite recording layer, and opto-magnetic information recording/reproducing device This invention relates to magneto-optical recording media such as magneto-optical disks and cards, manufacturing methods of the medium and a magneto-optical recording and playback device to record and play back data using the magneto-optical recording media. The mag... | 07/06/2004 |
| 6724694 | Disk mastering based on near-field optical systems Structures of storage media for optical storage systems, especially for systems in the near-field configuration to couple radiation between the optical head and the media at least in part by evanescent fields. ... | 04/20/2004 |
| 6690626 | Optical disk with magnetic layer separated magnetically between tracks and method of magnetically separating tracks of the optical disk On a disk-shaped substrate in which a predetermined region ranging in a radial direction is used as a data region for recording/reproduction, a first dielectric layer, a magnetic layer, and a second dielectric layer are provided. The data region includes ... | 02/10/2004 |
| 6687200 | Recording/reproducing apparatus for recording data in recording pits A recording/reproducing apparatus is configured to displace near-field light for recording or reproduction and tracking illumination light toward an outer periphery of a recording pit when an off-track state toward the outer periphery occurs. The amount o... | 02/03/2004 |
| 6661749 | Substrate for optical recording medium, optical recording medium, master disc, master disc recording apparatus, and signal generating apparatus A substrate for an optical recording medium, includes recording tracks formed in guide grooves on a disc; and an address section having an address pit sequence formed between the recording tracks in the guide grooves along an information reading direct... | 12/09/2003 |
| 6649285 | Magneto-optical recording medium and manufacturing method therefor A magneto-optical recording medium includes a magnetic reproducing layer having an axis of easy magnetization in a direction perpendicular to its layer surface, a magnetic intermediate layer formed on the magnetic reproducing layer and having an axis of e... | 11/18/2003 |
| 6570826 | Optical recording medium allowing high-density recording and reproduction of information A magnetically induced super-resolution (MSR) magneto-optical recording medium capable of reproducing a recorded mark smaller in size than a beam spot, having recording tracks consisting of lands and grooves. This magneto-optical recording medium includes... | 05/27/2003 |
| 6501728 | Optical disc having groove and land tracks An over-writable magneto-optical recording medium in which a recording section has at least a first dielectric layer, a first recording layer, a second recording layer, and a second dielectric layer formed sequentially and a reflective layer and a protect... | 12/31/2002 |
| 6483785 | Magneto-optical recording method using the relation of beam diameter and an aperture of converging lens Featured is a recording and reproducing method for recording and reproducing information on and from a recording medium. The medium includes a base having a property that a light can be transmitted therethrough, a readout layer formed on the base, which h... | 11/19/2002 |
| 6418091 | Magneto-optical recording medium having oxidized side wall between land and groove There are provided a magneto-optical disk, a super-resolution magneto-optical disk and a domain wall moving magneto-optical disk whose cross-talk, cross-write and cross-erasure are suppressed and whose recording density is improved. A recording magnetic l... | 07/09/2002 |
