Title:
INFORMATION RECORDING MEDIUM, INFORMATION REPRODUCING DEVICE, AND INFORMATION REPRODUCING METHOD
Document Type and Number:
Japanese Patent JP3954322
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an information recording medium which absorbs the eccentric error of a plurality of information recording layers to prevent the occurrence of unstable reproducing caused by the eccentric error.
SOLUTION: The information recording medium has a plurality of information recording layers like disks which are stuck to each other within the range of an allowable eccentric error, and an emboss lead-in area (12) provided in each information recording layer is provided with a first guard track (13) which is arranged for a first radial distance from the radial position in the innermost periphery of the emboss lead-in area toward the outer peripheral side and a second guard track (14) which is arranged for a second radial distance from the radial position in the outermost periphery of the emboss lead-in area toward the inner peripheral side.
Inventors:
Hideaki Osawa
Application Number:
JP2001132943A
Publication Date:
August 08, 2007
Filing Date:
April 27, 2001
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G11B7/007; G11B7/0045; G11B7/005; G11B7/24035; G11B7/24038; G11B7/2405; (IPC1-7): G11B7/007; G11B7/24
Domestic Patent References:
| JP11096602A | ||||
| JP2002092939A |
Foreign References:
| WO2000016320A1 | ||||
| WO2002023542A1 |
Attorney, Agent or Firm:
Takehiko Suzue
Sadao Muramatsu
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Shoji Kawai
Sadao Muramatsu
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Shoji Kawai