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| Number | Title | Issue Date |
| 8059497 | Megneto-optical recording device capable of changing the shapes of heating areas In an information recording/reproducing method performing a thermo-magnetic recording, a tracking offset value of a recording light spot and/or a tracking offset value of a magnetic flux detecting element is changed in accordance with a radial position at which a tr... | 11/15/2011 |
| 7688685 | Magneto-optical recording device capable of changing the shapes of heating areas In an information recording/reproducing method performing a thermo-magnetic recording, a tracking offset value of a recording light spot and/or a tracking offset value of a magnetic flux detecting element is changed in accordance with a radial position at which a tr... | 03/30/2010 |
| 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 |
| 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 |
| 7372796 | Apparatus for controlling monitor photo diode in optical pickup system An apparatus for controlling a monitor photo diode (PD) of an optical pickup system monitors an optical power signal output for writing data on or reading data from a disk. The apparatus includes a comparator which compares a voltage signal corresponding to the opti... | 05/13/2008 |
| 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 |
| 7352659 | Method and apparatus for phase and/or copy window control use with a domain expansion recording medium and record carrier A method and apparatus for controlling read-out and/or synchronization between an external magnetic field and written data during a reading operation from a magneto-optical recording medium includes generating a pulse in a reading signal in a read-out layer by copyi... | 04/01/2008 |
| 7342871 | High density optical disc and method for reproducing and recording data thereof A high-density optical disc such as a high density-digital versatile disc (HD-DVD) or Blu-ray disc, and a method for reproducing or recording data of the high-density optical disc. The high-density optical disc includes a lead-in area, a data area and a lead-out are... | 03/11/2008 |
| 7336590 | Dielectric reproducing apparatus, dielectric recording apparatus, and dielectric recording/reproducing apparatus A dielectric reproducing apparatus is provided with: a probe for applying an electric field to a dielectric material of a dielectric recording medium; a return electrode for returning the electric field applied from the probe; an inductor placed between the probe an... | 02/26/2008 |
| 7333402 | Magneto-optical head support structures A suspension supporting a magnetic head is formed by a member different in material from gimbals. As a result, the characteristic of the gimbals minimizing electric power loss in supplying current while sufficiently elastically holding the magnetic head can be compa... | 02/19/2008 |
| 7329561 | Fabricating memory components (PCRAMS) including memory cells based on a layer that changes phase state A method is describe for fabricating memory components including memory cells based on an active material of an active layer, the phase state of which can be changed and which is enclosed between a bottom electrode and a top electrode. To reduce the current intensit... | 02/12/2008 |
| 7301855 | Apparatus and method for storing ROM and RAM data into magneto-optical recording medium An optical disk apparatus records new information related to the ROM information into RAM at a position linked with the ROM information of an optical information storage medium while continuously regenerating the ROM information of the optical information storage me... | 11/27/2007 |
| 7209423 | Adaptive writing method for high-density optical recording apparatus and circuit thereof An adaptive writing method of a high-density optical recording apparatus and a circuit thereof. The circuit includes a discriminator for discriminating a magnitude of a present mark of input NRZI data and magnitudes of leading and/or trailing spaces of the input NRZ... | 04/24/2007 |
| 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 |
| 7193934 | Domain position detection magnetic amplifying magneto-optical system The present invention is a method of reading and writing in MAMMOS that uses the edge of the thermal profile for detection of a domain rather than using the tip of the profile. By using the edge, it is possible to detect the position of domains rather than merely th... | 03/20/2007 |
| 7173885 | Domain-wall-displacement-type magnetooptical recording medium A domain-wall-displacement-type magnetooptical recording medium is provided in which a floating magnetic field from a surrounding portion that operates on a recording/reproducing portion is suppressed. The recording medium includes a displacement layer having a comp... | 02/06/2007 |
| 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 |
| 7161876 | Magneto-optical recording medium, and method for recording information in a recording 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... | 01/09/2007 |
| 7149155 | Channeled dielectric re-recordable data storage medium A re-recordable data storage medium is disclosed. One embodiment of the medium includes a dielectric material and a filler material. The dielectric material is organized in columnar channels over which memory cells are logically distributed. The filler material is w... | 12/12/2006 |
| 7149180 | Apparatus for recording information in and/or reproducing information from a ferroelectric recording medium A dielectric recording medium in a disc form is provided with: a center hole; an inner area; a recording area; and an outer area, arranged concentrically from the inside in this order. The inner area, the recording area, and the outer area contain a uniform and flat... | 12/12/2006 |
| 7145847 | Annealed optical information recording medium and optical information recording/reproducing apparatus for the same A high density optical information recording medium comprises a substrate having rows of land and groove and a recording layer formed on the substrate. Each of the rows of land or groove includes at least two recording tracks separated by a denatured region produced... | 12/05/2006 |
| 7106677 | Reproduction signal evaluation method A reproduction signal evaluation method of this invention includes the step of obtaining a reproduction signal from an information recording medium on which digital information is recorded with record marks having different sizes, the step of obtaining the amplitude... | 09/12/2006 |
| 7082081 | Reproducing information data from a storage medium using first and second laser of different wavelengths A method of reading out data from a domain expansion data storage such as a MAMMOS magneto-optic disk (1) which includes a data storage layer in which data is stored in the form of magnetic marks, and an expansion layer capable of copying and expanding domain... | 07/25/2006 |
| 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 |
| 6985409 | Recording method and apparatus of domain wall displacement type magneto-optical recording medium The present invention provides a method of recording information on a magneto-optical recording medium of domain wall displacement type having a preformat area and a data area succeeding thereto, comprising the steps of generating a reproduction signal from said med... | 01/10/2006 |
| 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 |
| 6980491 | Domain wall displacement type magneto-optical recording medium and recording method There is provided a domain wall displacement type magneto-optical recording medium and a recording method that allow signals recorded with a high density over the limit of resolution of optical systems to be regenerated without increasing complexity of a recording a... | 12/27/2005 |
| 6965545 | Optical recording medium with prepit regions and recording/reproducing method thereof An information recording medium for reproducing information by irradiation with a laser beam condensed by an objective lens with a numerical aperture NA includes a disk-shaped substrate and a recording layer disposed on the substrate. On the surface of the substrate... | 11/15/2005 |
| 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 |
| 6947236 | Magnetic signal recording method and magnetic recording-reproduction apparatus A magnetic signal recording method of the present invention superimposes a recording edge of a recordable region on a region where there is substantial equality between (a) a coercive force in a region on a magnetic recording medium in which the coercive force has b... | 09/20/2005 |
| 6944100 | Method for reproducing information data from a magneto-optical storage medium in reverse direction with recording A magneto-optical recording/reproducing method is disclosed which causes a laser beam to be emitted to a disc recording medium having information recorded thereon earlier by magnetic field modulation, the laser beam causing the disc recording medium to develop a tem... | 09/13/2005 |
| 6922383 | Recording apparatus with light power control for use with optical recording medium and method thereof An optical recording apparatus includes a light source driving unit for driving a light source; an emitted light power detecting unit for detecting an emitted light power; a temperature detecting unit for detecting a temperature of the light source; a light power co... | 07/26/2005 |
| 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 |
| 6847592 | Optical reproducing device and optical memory medium An optical reproducing device according to the present invention detects mean amplitude values of short marks and long marks, which are recorded marks for reproducing power control, by means of a short mark level detecting circuit and a long mark level detecting cir... | 01/25/2005 |
| 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 |
| 6788644 | Devuce and method for forming a focus error signal based on ohase difference between corresponding parts of detector signals A device scans an optical record carrier having optically detectable marks along a track. The device includes a radiation source for emitting a radiation beam, an objective system for guiding the radiation beam to the record carrier, and a radiation-sensitive detect... | 09/07/2004 |
| 6754141 | Recording medium, method for recording and reproducing data using the medium, and magneto-optical recording apparatus A magneto-optical recording medium, a method for recording and reproducing data using the medium and a magneto-optical recording apparatus are provided in which an optical head reads the recorded data while applying a magnetic field, and the ill effect of the leakag... | 06/22/2004 |
| 6741527 | Magneto-optical recording medium and magneto-optical recording and reproducing device capable of controlling reproduction power based on long recorded marks A magneto-optical disk recording and reproducing device, which carries out recording and reproducing for a magnetic super-resolution magneto-optical disk including a recording layer and reproducing layer, has a recording data processing circuit which records long re... | 05/25/2004 |
| 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 |
