Optical information recording medium
AssigneeTaiyo Yuden Co., Ltd.
InventorsSachiko Ishibashi, Fumi Hara, Toru Fujii, Yuji Arai
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Abstract
For improving the humidity resistance reliability and the jitter property of an optical disk, the adhesive layer used for bonding a bonding type optical information recording medium is defined such that the glass transition temperature is 100° C. or higher at 200° C. or lower, the modulus of elasticity at 25 to 80° C. is 1000 MPa or more, the adhesion strength thereof is 4N or more, the reflective layer is defined such that the hardness is 60 mgf/μm2 or more as the nano indentation hardness, and the dye recording layer is defined such that the water solubility of the dye as light absorption is 0.2 or less.
Claims7
An optical information recording medium comprising:
- first and second opposing transparent substrates comprising at least one recording layer on a first main surface of the first or second substrate, the recording layer having previously recorded or being configured to record, and the substrates being configured to transmit light from a second main surface to the recording layer;
- and
- at least one adhesive layer configured to bond the first and second substrates, wherein the adhesive layer has a glass transition temperature between about 100° C. and about 200° C.
Dependencies are inferred from the claim text.