发明名称 |
DISC-SHAPED RECORDING MEDIUM, MANUFACTURING METHOD THEREOF, AND DISC DRIVE DEVICE |
摘要 |
<p>A magneto-optical disk which reproduces information with an optical pickup head which uses an electromagnetic force as the driving force is provided. Other areas than at least the recording track are magnetized uniformly in a direction of canceling the influence of external magnetic field applied by the optical pickup head or a recording pattern having a frequency higher than modulation transfer function (MTF) of the optical pickup head is recorded to the other areas than at least the recording track. Read signals SP12 and SP14 from the magneto-optical disk are low in bit error rate. <IMAGE></p> |
申请公布号 |
EP1515327(A1) |
申请公布日期 |
2005.03.16 |
申请号 |
EP20030733313 |
申请日期 |
2003.06.06 |
申请人 |
SONY CORPORATION |
发明人 |
TERAOKA, YOSHIYUKI;WATANABE, MAKOTO |
分类号 |
G11B11/105;(IPC1-7):G11B11/105 |
主分类号 |
G11B11/105 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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