Invention Grant
- Patent Title: Single-sided triple layer optical disc
- Patent Title (中): 单面三层光盘
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Application No.: US11504613Application Date: 2006-08-16
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Publication No.: US07652967B2Publication Date: 2010-01-26
- Inventor: Toshihiro Sugaya , Masato Otsuka
- Applicant: Toshihiro Sugaya , Masato Otsuka
- Applicant Address: JP Tokyo JP Chikusei
- Assignee: Kabushiki Kaisha Toshiba,Memory-Tech Corporation
- Current Assignee: Kabushiki Kaisha Toshiba,Memory-Tech Corporation
- Current Assignee Address: JP Tokyo JP Chikusei
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- Priority: JP2005-237741 20050818
- Main IPC: G11B3/74
- IPC: G11B3/74

Abstract:
An optical disc is based on the following the distance of the light transmission layer from a light incidence plane to the first recording layer is a minimum of 550 μm. The distance between the first and the third recording layer is a maximum of 72 μm. The distance between the second and the third recording layer is a minimum of 15 μm. The distance between the first and the second recording layer is about 31 to 40 μm. The reflectivities of the first and the second recording layer with respect to the first laser beam are 18% or more, and the ratio between the reflectivities is about 1.15 or less. The areal recording density of the third recording layer is three times or more as high as the areal recording density of the first and the second recording layer.
Public/Granted literature
- US20070041295A1 Optical disc, optical disc apparatus, and digital work publication Public/Granted day:2007-02-22
Information query
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