Invention Grant
- Patent Title: Information recording medium having a plurality of recording layers
- Patent Title (中): 具有多个记录层的信息记录介质
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Application No.: US10563799Application Date: 2004-03-15
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Publication No.: US07715285B2Publication Date: 2010-05-11
- Inventor: Hiroshi Maegawa
- Applicant: Hiroshi Maegawa
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Dickstein Shapiro LLP
- Priority: JP2003-192940 20030707; JP2003-313867 20030905; JP2003-313868 20030905; JP2003-319990 20030911
- International Application: PCT/JP2004/003420 WO 20040315
- International Announcement: WO2005/004118 WO 20050113
- Main IPC: G11B7/00
- IPC: G11B7/00
Abstract:
An information recording medium is provided with a plurality of information recordable recording layers, and a spiral or concentric tracks are formed on each of the plurality of recording layers. At least a portion of each track has wobbles corresponding to a wobble signal that includes layer information for discriminating the recording layer formed with the track.
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