Invention Grant
- Patent Title: Optical information recording medium
- Patent Title (中): 光信息记录介质
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Application No.: US12477589Application Date: 2009-06-03
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Publication No.: US08216655B2Publication Date: 2012-07-10
- Inventor: Kotaro Kurokawa
- Applicant: Kotaro Kurokawa
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: K&L Gates LLP
- Priority: JP2008-153200 20080611
- Main IPC: B32B3/02
- IPC: B32B3/02

Abstract:
An optical information recording medium is provided and includes a supporting substrate, a light-transmissive protective layer, information recording layers, and at least one interlayer transparent to a laser beam having a wavelength of 400 to 410 nm. Among the information recording layers, one or a plurality of information recording layers other than the information recording layer closest to the supporting substrate each function as a semi-transmissive information recording layer that transmits the laser beam. Some or all of the one or the plurality of semi-transmissive information recording layer include, from the laser beam incident side, a first dielectric portion having a refractive index of 2.4 or more for the wavelength of the laser beam, a recording material portion having a thickness of at least 5.2 nm, a second dielectric portion, a metal portion having a thickness of at least 7 nm, and a third dielectric portion in that order.
Public/Granted literature
- US20090311461A1 OPTICAL INFORMATION RECORDING MEDIUM Public/Granted day:2009-12-17
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