Invention Grant
- Patent Title: Optical recording medium
- Patent Title (中): 光记录介质
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Application No.: US11222835Application Date: 2005-09-12
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Publication No.: US07675838B2Publication Date: 2010-03-09
- Inventor: Takuya Tsukagoshi , Koji Mishima , Daisuke Yoshitoku
- Applicant: Takuya Tsukagoshi , Koji Mishima , Daisuke Yoshitoku
- Applicant Address: JP Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge, PLC
- Priority: JP2004-266060 20040913
- Main IPC: G11B7/24
- IPC: G11B7/24 ; G11B3/70 ; G11B5/84 ; G11B7/26

Abstract:
A multilayer optical recording medium comprises four recording layers including an L0 layer, an L1 layer, an L2 layer, and L3 layer laminated between a substrate and an optically transparent cover layer and optically transparent spacer layers each provided between the recording layers. The L2 layer has the negative dependence of the reflectance on the incident angle of a laser light beam for reproduction. Crosstalk can be effectively reduced by the relation between the configuration of the respective recording layers and the crosstalk.
Public/Granted literature
- US20060077877A1 Optical recording medium Public/Granted day:2006-04-13
Information query
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