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| Number | Title | Issue Date |
| 7365941 | Optical recording head including an optical resonant cavity An optical recording head including a media heating device to write and read data to a heat sensitive optical media disk. The media heating device includes an optical energy resonant cavity that produces a high intensity near-field optical spot of subwavelength dime... | 04/29/2008 |
| 7355932 | Optical disk device for detecting thickness errors of the transparent substrate The invention detects the thickness error of the transparent substrate using a general focus error signal detection system employing the fact that the reflecting light from the optical disk causes distortions in diffraction image at the detection plane or unsymmetri... | 04/08/2008 |
| 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 |
| 7310205 | Thermally assisted recording of magnetic media using a resonant cavity and energy A magnetic head including a media heating device including an optical cavity resonator that produces a high intensity near-field optical beam adjacent to the write pole. Optical energy is coupled into the resonant cavity through a waveguide that is placed proximate ... | 12/18/2007 |
| 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 |
| 7283443 | Power saving method for portable streaming devices A method (2) of controlling memory usage in a portable streaming device (100), a portable streaming device (100) and a computer readable medium (110). The portable streaming device (100) comprises at least one memory (102), ... | 10/16/2007 |
| 7272102 | Ridge waveguide with recess A ridge waveguide having a recessed ridge forming an isolated tip at a terminal end of the waveguide's aperture efficiently couples light into a spot adjacent to the tip in a medium below the terminal end of the waveguide which is significantly smaller than the ligh... | 09/18/2007 |
| 7260036 | Data processor used in a plurality of optical disk recording mediums A data processor compatible for use with a CD and a DVD includes a first modulation circuit for modulating recording data for recording on a CD to generate first modulated data. A second modulation circuit modulates recording data for recording on a DVD to generate ... | 08/21/2007 |
| 7245571 | Optical disk drive that can adjust erase power during writing operation An optical disk drive that can automatically adjust an erase power to an appropriate level to keep the error rate low and not to shorten the life of an erasable optical disk. The optical disk drive obtains a reference erasing modulation factor using a test area of t... | 07/17/2007 |
| 7236332 | Thermally assisted recording of magnetic using an in-gap optical resonant cavity A magnetic head including a media heating device that is fabricated within the magnetic head structure. The media heating device is fabricated between the writing magnetic pole of a perpendicular magnetic head and the ABS surface of the head, where it serves to heat... | 06/26/2007 |
| 7212478 | Data assurance method for optical storage media and optical storage device A data assurance method controls an optical head according to the difference between the device temperature and the temperature of inserted removable optical storage media. A rate of temperature change c is calculated from the output of a temperature sensor which de... | 05/01/2007 |
| 7210155 | Magneto-optical recording medium having in-plane magnetizing layer A high-density magneto-optical recording medium having excellent jitter properties is provided. A pattern-dependent shift of the length of a recorded mark does not occur even when a minute mark has increased sensitivity to a recording magnetic field. A magneto-optic... | 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 |
| 7196955 | Hardmasks for providing thermally assisted switching of magnetic memory elements An exemplary magnetic random access memory comprises a plurality of hardmasks, a plurality of magnetic memory elements each having been formed using a corresponding one of the hardmasks, and at least one conductor near the hardmasks. The conductor is capable of carr... | 03/27/2007 |
| 7173894 | ROM-RAM medium and storage device thereof A ROM-RAM recording medium includes a ROM portion in which main information is recorded by a physical change on an optically transparent substrate and a RAM portion formed on the ROM portion as a recording layer that allows writing of main information at least once.... | 02/06/2007 |
| 7164623 | Magneto-optical recording medium The present invention provides a magneto-optical recording medium including a recording layer, an intermediate layer and a reproducing layer stacked in this order. Information recorded in the recording layer is transferred to the reproducing layer through the interm... | 01/16/2007 |
| 7165263 | Method for annealing domain wall displacement type magneto-optical disc and magneto-optical disc A manufacturing method of a domain wall displacement type magneto-optical recording medium comprises the steps of depositing a magnetic layer on a substrate to prepare a disc, and irradiating the magnetic layer with a converged light beam while applying a magnetic f... | 01/16/2007 |
| 7161875 | Thermal-assisted magnetic memory storage device A thermal-assisted probe based magnetic memory storage device. In a particular embodiment, magnetic tunnel junction memory cells and at least one movable probe with a tip characterized by a conductor and a heat generator are provided. The movable probe may be placed... | 01/09/2007 |
| 7126883 | Optical information reproducing method, optical head device, and optical information processor An optical information reproducing method of the present invention is used for an optical recording medium. The optical recording medium includes a recording layer containing information and a mask layer that is located close to the recording layer and includes a no... | 10/24/2006 |
| 6981205 | Data storage apparatus, read data processor, and read data processing method To improve the probability of error correction, thereby generating correct read data. Data is read from the same sector by a number of times and a majority decision is done in the same address, thereby the most frequently read value is regarded as the true data valu... | 12/27/2005 |
| 6958956 | Magneto-optical reading device for multi-track magnetic tapes The disclosure relates to a magneto-optical reading device for multi-track magnetic tapes, including a flat large incident beam directed onto the active part of a magneto-optical read head and reflected by this head onto an array of sensors, characterized in that it... | 10/25/2005 |
| 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 |
| 6920091 | Optical reproduction apparatus and optical recording and reproduction apparatus There is provided an optical reproduction apparatus and an optical recording and reproduction apparatus which can improve a CNR and can read at high speed. The center portion of a laser light emitted from a semiconductor laser is shaded by a light shading portion of... | 07/19/2005 |
| 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 |
| 6801478 | Magneto-optical information reproducing apparatus There is disclosed a magneto-optical information reproducing apparatus which can perform information reproducing with a low crosstalk level, and the apparatus comprises a biasing electromagnet 19 for generating a reproducing magnetic field, and an MPU 26 | 10/05/2004 |
| 6771567 | Dual shield vertical magneto-optical read head A magneto-optical read head for detecting magnetic transitions representing data stored in a magnetic recording medium as a sense layer having an optical property that is magnetic field-dependent, two magnetic shield layers respectively disposed on opposite sides of... | 08/03/2004 |
| 6693854 | Reproducing method and reproducing apparatus for magneto-optical recording medium External magnetic fields H(x) or reproducing light beams L(x) having different intensity patterns are applied to an identical recording position on a magneto-optical recording medium so that different pieces of information corresponding to the patterns ar... | 02/17/2004 |
| 6687194 | Optical storing apparatus and reproducing method for correcting read errors A read retry of an MSR medium is executed while changing a setting of a reproducing magnetic field. Parameter set values of a successful read retry are stored as statistic information. When changes of the set values for defaults increase, the defaults are... | 02/03/2004 |
| 6683823 | Method for reproducing information on a recording medium A method for reproducing information on a recording medium includes irradiating electromagnetic energy or light to the recording medium from one side with respect to the recording medium, applying a recording magnetic field to an electromagnetic energy or... | 01/27/2004 |
| 6646968 | Magneto-optical recording apparatus and method including method for presetting optimum recording power of recording apparatus Disclosed herein is a testing process for recording for presetting optimum recording power for a domain wall displacement type magneto-optical medium, the process comprising the steps of: recording a first record pattern on an Nth track on the magneto-opti... | 11/11/2003 |
| 6519210 | Optical storage apparatus having reproducing magnetic field correcting unit and recording and reproducing method of optical storage medium A reproducing magnetic field correcting unit is provided, a reproducing state is monitored while increasing a reproducing magnetic field by using a predetermined reproducing magnetic field as an initial value H1, and a reproducing magnetic field when a re... | 02/11/2003 |
| 6515814 | Device and method for reproducing magnetic signal The present invention provides a magnetic signal reproducing device including heating means for locally heating a reproducing region of a magnetic recording medium, first reproducing means for reading magnetic information in the reproducing region in a fi... | 02/04/2003 |
| 6469960 | Magneto-optical storage apparatus capable of adjusting the magnetic field strength In an information storage apparatus for recording information in a recording medium by applying an external magnetic field to a position illuminated by the light beam, an external magnetic field control part controls an external magnetic field strength ba... | 10/22/2002 |
| 6399174 | 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... | 06/04/2002 |
| 6339582 | Optical disk and recording/reproducing method thereof An optical disk having a recording layer onto which light is irradiated to perform recording/reproducing of information, comprising a super-resolution film for recording and a reflective film which are formed in the side opposite to the light entering sid... | 01/15/2002 |
| 6333827 | Magnetic signal reproducing device, magnetic signal reproducing method and magnetic recording medium for high density reproduction The present invention is a magnetic signal reproducing device for reproducing information from a magnetic recording medium in which a polarity of magnetization is inverted at a first temperature during temperature change. The device includes local tempera... | 12/25/2001 |
| 6324128 | Optical storage apparatus and recording and reproducing method of optical storage medium A reproducing magnetic field correcting unit, a reproducing state is monitored while increasing a reproducing magnetic field by using a predetermined reproducing magnetic field as an initial value H1, and a reproducing magnetic field when a reproducible s... | 11/27/2001 |
| 6246641 | Magneto-optical recording-reproducing method and apparatus utilizing domain wall displacement Disclosed herein is a magneto-optical recording-reproducing method, wherein a domain wall of a record mark is displaced on a recording medium, thereby conducting the reproduction of information, the method comprising the steps of reproducing the prescribe... | 06/12/2001 |
| 6188649 | Method for reading magnetic super resolution type magneto-optical recording medium A reading method for a magneto-optical recording medium is provided, irradiating laser light as a reading beam and using a magnetic head. High density and high transmission rate are possible and a correct reading can be performed according to the length o... | 02/13/2001 |
| 6181650 | Optical disk drive and super-resolution reproduction method for optical disk An optical disk drive for reproducing an optical disk having a recording layer and a super-resolution film provided on a reproduction-beam incident side with respect to the recording layer, the super-resolution film being formed of such a material that an... | 01/30/2001 |
