Invention Grant
- Patent Title: Optical information recording medium
- Patent Title (中): 光信息记录介质
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Application No.: US12182724Application Date: 2008-07-30
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Publication No.: US07936661B2Publication Date: 2011-05-03
- Inventor: Atsuo Shimizu , Shinichi Kojo
- Applicant: Atsuo Shimizu , Shinichi Kojo
- Applicant Address: JP Tokyo
- Assignee: Taiyo Yuden Co., Ltd.
- Current Assignee: Taiyo Yuden Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Law Office of Katsuhiro Arai
- Priority: JP2007-198850 20070731
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
Provided is an optical information recording medium that can be recorded with data with only a special recording apparatus and the recorded data can be read out with a general recording/reproducing apparatus. The optical information recording medium includes a disc-like light-transmissive substrate having a surface provided with a spiral groove WB having a wobble and a land LN between adjacent segments of the groove WB, a light-absorbing layer disposed on the surface of the light-transmissive substrate, and a light reflection layer disposed on the light-absorbing layer. The groove WB has a depth Ds of about 140 nm≦Ds≦155 nm, the light-absorbing layer has a recess with a depth Dd of about 95 nm≦Dd≦105 nm in the groove, and a push-pull signal before recording has a value of about 0.3 or less. The optical information recording medium may include an anti-illegal copy measure.
Public/Granted literature
- US20090059778A1 OPTICAL INFORMATION RECORDING MEDIUM Public/Granted day:2009-03-05
Information query
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