发明名称 |
Optical recording disk, and recording/reading apparatus using same |
摘要 |
The present invention relates to a magneto-optical recording medium, in which are provided at least a reading layer and a writing layer on a substrate. A track guide groove is formed in the medium so as to include in-groove portions and on-land portions. Pits are formed on a portion along the track longitudinally adjacent where an in-groove portion and where no guide groove exists. Pits are also formed in an on-land portion between the in-groove portions of the track guide groove. Only a portion where a temperature has been raised by optical beam irradiation is read, while a domain of a writing layer is copied on the writing layer, whereby a writing/reading operation can be effected with narrower track pitches.
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申请公布号 |
US5422874(A) |
申请公布日期 |
1995.06.06 |
申请号 |
US19930118232 |
申请日期 |
1993.09.09 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
BIRUKAWA, MASAHIRO;MIYATAKE, NORIO;FUKAMACHI, YUUICHI;KUDOH, YOSHIHIKO;HINO, YASUMORI |
分类号 |
G11B11/10;G11B7/007;G11B7/24;G11B7/26;G11B11/105;G11B20/12;G11B27/19;G11B27/30;(IPC1-7):G11B7/007 |
主分类号 |
G11B11/10 |
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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