Invention Grant
- Patent Title: Optical information recording medium
- Patent Title (中): 光信息记录介质
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Application No.: US13384069Application Date: 2010-07-15
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Publication No.: US08437243B2Publication Date: 2013-05-07
- Inventor: Hideharu Tajima , Atsushi Etoh , Hiroaki Ashiwa , Ryo Kojima , Masahito Konishi , Isamu Kuribayashi
- Applicant: Hideharu Tajima , Atsushi Etoh , Ryo Kojima , Masahito Konishi , Isamu Kuribayashi , Makoto Suzuki
- Applicant Address: JP Osaka JP Ibaraki JP Tokyo
- Assignee: Sharp Kabushiki Kaisha,Memory-Tech Corporation,TDK Corporation
- Current Assignee: Sharp Kabushiki Kaisha,Memory-Tech Corporation,TDK Corporation
- Current Assignee Address: JP Osaka JP Ibaraki JP Tokyo
- Agency: Edwards Wildman Palmer LLP
- Agent David G. Conlin; Steven M. Jensen
- Priority: JP2009-169568 20090717; JP2010-160515 20100715
- International Application: PCT/JP2010/062002 WO 20100715
- International Announcement: WO2011/007841 WO 20110120
- Main IPC: G11B3/70
- IPC: G11B3/70 ; G11B7/04

Abstract:
An optical information recording medium (1) includes on a substrate (50), a ROM layer (20), a RE layer (40), an intermediate layer (30) separating the ROM layer (20) and the RE layer (40), and a light transmitting layer (10) provided farthest from the substrate (50). The RE layer (40) is an information recording layer provided most farthest from the light transmitting layer (10), and is a recording layer of BCA recorded in a format easily determinable as compared to an information recording format used in the ROM layer (20), and antifouling property of a surface of the light transmitting layer (10) is set based on the RE layer (40). This makes it easy for the recording and reproducing apparatus to confirm a disc type, allows for sharing one recording and reproducing apparatus with other types of optical discs, and simplifies the disc production. Furthermore, an optical information recording medium is accomplished, in which outdated data on the ROM layer is replaced by recording, on the RE layer, updated data obtained while Internet connection can be established.
Public/Granted literature
- US20120263029A1 OPTICAL INFORMATION RECORDING MEDIUM Public/Granted day:2012-10-18
Information query
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