利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

7 条记录 (耗时 0.009 秒)

    MAGNETO-OPTICAL RECORDING MEDIUM
    3.
    发明公开
    MAGNETO-OPTICAL RECORDING MEDIUM 有权
    光磁记录介质

    公开(公告)号：EP1521254A4

    公开(公告)日：2008-05-28

    申请号：EP03741199

    申请日：2003-07-04

    申请人： SONY CORP

    发明人： MIKI TAKESHI ,  FUJITA GORO

    IPC分类号： G11B7/007 ,  G11B7/24076 ,  G11B7/24079 ,  G11B11/105

    CPC分类号： G11B11/10584 ,  G11B7/24076 ,  G11B7/24079 ,  G11B11/10578

    摘要： A magneto-optical recording medium of domain wall motion detection type in the form of groove recording for recording a signal in a signal recording area within a groove formed along a recording track. The radius of curvature R1 of the shoulder portion, adjacent to a groove, of the land between grooves in the cross section taken perpendicularly to the recording track is 30 nm or less, and the radius of curvature R2 of the inner edge portion, adjacent to the land, of the groove where a signal is recorded in the cross section taken perpendicularly to the recording track is 20 nm or more. The recording power margin is increased, the jitter is improved, and the error rate is also improved.

    METHOD FOR THERMAL TREATMENT JUDGMENT ON MAGNETO-OPTICAL INFORMATION RECORDING MEDIUM AND DEVICE FOR THERMAL TREATMENT JUDGMENT
    5.
    发明公开
    METHOD FOR THERMAL TREATMENT JUDGMENT ON MAGNETO-OPTICAL INFORMATION RECORDING MEDIUM AND DEVICE FOR THERMAL TREATMENT JUDGMENT 审中-公开
    方法热处理评估在磁光信息记录热处理评估介质和设备

    公开(公告)号：EP1662500A4

    公开(公告)日：2008-11-19

    申请号：EP04772200

    申请日：2004-08-19

    申请人： SONY CORP

    发明人： TANAKA YASUHITO ,  MIKI TAKESHI ,  SAKAMOTO TETSUHIRO ,  FUJITA GORO ,  FUJIIE KAZUHIKO

    IPC分类号： G11B11/105

    CPC分类号： G11B11/10582

    摘要： For thermal treatment a magneto-optical disk (33) is irradiated with a laser beam of a predetermined power from an LD (11). After the thermal treatment, the region where the thermal treatment is performed is irradiated with a laser beam with less power than that for the thermal treatment. The reflected light of the less-power laser beam is incident on optical sensors (24, 26), and the reflected light intensities of the P-wave and S-wave are detected. Using the reflected light intensities of the P-wave and S-wave, a difference detection circuit (27) detects the level of the magneto-optical signal corresponding to the region where the thermal treatment is performed. A controller (28) judges whether or not the magneto-optical signal level detected by the detection circuit (28) is within the allowable range. If, out of the range, the laser beam power for the thermal treatment is adjusted, the magneto-optical disk treatment is stopped, or a message representing the measure is displayed.

    RECORDING DEVICE, RECORDING METHOD, DISC MANUFACTURING METHOD AND OPTICAL DISC RECORDING MEDIUM
    7.
    发明公开
    RECORDING DEVICE, RECORDING METHOD, DISC MANUFACTURING METHOD AND OPTICAL DISC RECORDING MEDIUM 审中-公开
    记录装置，记录过程中，用于生产媒体和光盘记录介质

    公开(公告)号：EP1884935A4

    公开(公告)日：2008-12-17

    申请号：EP06746309

    申请日：2006-05-11

    申请人： SONY CORP

    发明人： FUJITA GORO ,  MIKI TAKESHI ,  SHIMOUMA TAKASHI ,  ASHIZAKI KOJI ,  NAKAKURA MASATO

    IPC分类号： G11B7/0045

    CPC分类号： G11B7/00452 ,  G11B7/006 ,  G11B7/268

    摘要： A substrate is deformed into a raised shape by irradiating an optical disc recording medium with a laser beam at a prescribed laser power. As the substrate is deformed into the raised shape, a reflecting film laminated on the substrate is also deformed into the raised shape, and a reproduction signal level equivalent to that of a land portion can be obtained at a pit portion by the embodiment of the raised deformation. A reproduction signal level equivalent to that of the pit portion can be obtained at the land. At this time, since the raised deformation embodiment can be controlled by the power of the laser beam applied, the pit can be made into land and the land can be made into pit by setting the laser power. Thus, recording data can be rewritten in the optical disc recording medium wherein data is recorded by the combination of the pits and lands formed on the substrate.