- Patent Title: Apparatus and method for producing optical recording medium, optical recording medium, apparatus and method for reproduction and apparatus and method for recording
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Application No.: US11893309Application Date: 2007-08-15
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Publication No.: US07680019B2Publication Date: 2010-03-16
- Inventor: Tetsujiro Kondo , Norifumi Yoshiwara
- Applicant: Tetsujiro Kondo , Norifumi Yoshiwara
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Frommer Lawrence & Haug LLP
- Agent William S. Frommer
- Priority: JPP2002-129303 20020430
- Main IPC: G11B7/24
- IPC: G11B7/24 ; G11B7/00

Abstract:
An optical recording medium having a plural number of recording layers includes a n-th recording layer (23) (n≧1), made up by a substrate (20) and a semi-reflective layer (21) carried by the substrate (20) and adapted for partially reflecting and partially transmitting the incident light, a (n+1)th recording layer (28), made up by another substrate (25) and a reflecting layer (26) carried by the substrate (25) and adapted for reflecting the incident light, and a light condensing layer (24) for condensing the light incident via the n-th recording layer (23) on the (n+1)th recording layer (28).
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