发明名称 |
Optical information recording method and optical information recording device |
摘要 |
A recording layer (2) and a light-transmitting layer (3) are provided on a substrate (1) having a guide groove for tracking a light beam projected in a spot for information recording/reproduction. The spot light beam is projected onto the recording layer (2) through the light-transmitting layer (3) so as to record information in a first portion (G') of the recording layer corresponding to the inside (G) of the guide groove and a second portion (L') of the recording layer corresponding to a flat portion (L) between adjacent guide grooves. The depth d of the first portion (G') with respect to the second portion (L') on the light-transmitting layer side of the recording layer (2) satisfies the relation »/5.8nf ‰¤ d ‰¤ »/5nf where » is the wavelength of the light and nf is the index of refraction of the light-transmitting layer (3) to the wavelength X. The reflectance of the recording layer (2) after the recording is larger than that before the recording.
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申请公布号 |
EP1583084(A2) |
申请公布日期 |
2005.10.05 |
申请号 |
EP20050014566 |
申请日期 |
2003.04.08 |
申请人 |
NEC CORPORATION |
发明人 |
OHKUBO, SHUICHI |
分类号 |
G11B7/007;(IPC1-7):G11B7/007 |
主分类号 |
G11B7/007 |
代理机构 |
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地址 |
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