发明名称 |
Optical recording medium |
摘要 |
A method for manufacturing an optical recording medium having a groove track on which pits carrying data are to be formed, and a land pre-pit track connected to said groove track, wherein a plurality of land prepits are previously formed on said land pre-pit track, is disclosed in which land pre-pits are formed by
a step for shifting a spot of a cutting light beam projected onto a mask sheet in a direction perpendicular to a direction in which said groove information track extends; and a step for returning said spot after being shifted, wherein said groove information track is thereby made to have a smaller track width in at least a part of each of sections in which said land prepit exists, than in sections in which no land prepit exists.
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申请公布号 |
EP1772863(A2) |
申请公布日期 |
2007.04.11 |
申请号 |
EP20070000034 |
申请日期 |
2000.04.05 |
申请人 |
PIONEER CORPORATION |
发明人 |
TAKISHITA, TOSHIHIKO;KATO, MASAHIRO;MURAMATSU, EIJI;HORIKAWA, KUNIHIKO;TANIGUCHI, SHOJI;YAMAGUCHI, ATSUSHI |
分类号 |
G11B7/26;G11B7/007;G11B7/013 |
主分类号 |
G11B7/26 |
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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