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.
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
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