Optical recording medium-producing sheet and optical recording medium

Abstract

An optical disc-producing sheet 1, which has an adhesive layer 11 having a specific heat capacity after curing of not more than 1.9 J / g. DEG C at 80 DEG C and a protective sheet 12, is laminated onto an information recording layer 3 (a laminate of a reflecting layer 31, a dielectric layer 32, a phase change layer 33 and a dielectric layer 32') formed on an optical recording medium substrate 2. According to this optical disc, recorded information can be reproduced accurately even in the case that recording / erasure or reproduction of information has been carried out repeatedly.

Description

technical field [0001] The present invention relates to a writable optical recording medium such as a write-once optical disc or a rewritable optical disc, and an optical recording medium manufacturing sheet capable of manufacturing such an optical recording medium, and particularly relates to In the case of , it is also possible to accurately reproduce a writable optical recording medium in which information is recorded, and a sheet for producing an optical recording medium that can manufacture such an optical recording medium. Background technique [0002] As a rewritable optical recording medium for recording with light, a write-once optical disc that can only be recorded once, and a rewritable optical disc that can be recorded multiple times by repeating erasure and writing, in recent years, by By shortening the recording laser wavelength and adopting high NA lenses, the increase in recording capacity has continued to increase. [0003] Taking the recording capacity of ...

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Problems solved by technology

[0008] However, in the existing writable optical recording medium, if the recording, deletion or reproduction of information is repeated, there is a problem that the recorded information cannot be reproduced correctly.

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