Invention Grant
- Patent Title: High density phase-change type optical disk having a data efficiency of more than 80 percent
- Patent Title (中): 数据效率大于80％的高密度相变型光盘
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Application No.: US11864226Application Date: 2007-09-28
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Publication No.: US07782743B2Publication Date: 2010-08-24
- Inventor: Takashi Ishida , Hiromichi Ishibashi , Mamoru Shoji , Atsushi Nakamura , Junichi Minamino , Shigeru Furumiya
- Applicant: Takashi Ishida , Hiromichi Ishibashi , Mamoru Shoji , Atsushi Nakamura , Junichi Minamino , Shigeru Furumiya
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Panitch Schwarze Belisario & Nadel LLP
- Priority: JP2000-308755 20001010
- Main IPC: G11B7/24
- IPC: G11B7/24
Abstract:
An optical disk includes a groove and a land. Data is recorded on either the land or the groove. A pitch of the groove and a pitch of the land are 0.32 μm or more. The optical disk has a data efficiency of 80% or more by adopting a format in which other types of user data are added to every plural user data sets. The data efficiency is defined by a ratio of a user data capacity that can be used by a user to a total data capacity of the optical disk.
Public/Granted literature
- US20080025194A1 HIGH DENSITY PHASE-CHANGE TYPE OPTICAL DISK HAVING A DATA EFFICIENCY OF MORE THAN 80 PERCENT Public/Granted day:2008-01-31
Information query
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