发明授权
US06724717B2 Optical recording disc 失效
光记录盘

  • 专利标题: Optical recording disc
  • 专利标题(中): 光记录盘
  • 申请号: US10002233
    申请日: 2001-11-15
  • 公开(公告)号: US06724717B2
    公开(公告)日: 2004-04-20
  • 发明人: Eiji Noda
  • 申请人: Eiji Noda
  • 优先权: JP2000-348561 20001115
  • 主分类号: G11B370
  • IPC分类号: G11B370
Optical recording disc
摘要:
An optical disc including a substrate having a top surface provided with a ROM area and a RAM area, and a recording layer provided on the substrate. The ROM area is provided with pre-grooves each having a bottom surface and wherein the RAM area is provided with pre-grooves. The ROM area also has pre-pits formed on the bottom surface of the pre-grooves thereof.
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