Optical information recording medium
AssigneeTaiyo Yuden Co., Ltd.
InventorsFumi Hara, Sachiko Ishibashi, Masashi Satoh, Toru Fujii, Yuji Arai
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Abstract
For improving the jitter property and ensuring the high reliability of an optical disk, a metal film containing phosphorus is disposed in a reflective layer. The layer has a hardness of 60 mgf/μm2 or more as nano indentation hardness, and an adhesive layer used for bonding has a glass transition temperature of 100° C. or higher but 200° C. or lower, an elastic modulus at 25 to 80° C. of 1000 MPa or more, and an adhesion strength of 4N or more. The dye for the dye recording layer has a water solubility of 20% or less as measured as light absorbance of hot water in which the dye recording layer is soaked.
Claims13
An optical information recording medium comprising a transparent substrate and layers including a dye recording layer and a reflective layer formed on the transparent substrate in this order, wherein information can be recorded on or reproduced from the dye recording layer by irradiation of light through the transparent substrate, wherein the reflective layer is comprised of a metal film containing a phosphorus component.
An optical information recording medium comprising (i) a first transparent substrate, (ii) layers including a dye recording layer and a reflective layer formed on the first substrate in this order, (iii) an adhesive layer formed on the reflective layer, and (iv) a second transparent substrate formed on the reflective layer via the adhesive layer, wherein information can be recorded on or reproduced from the dye recording layer by irradiation of light through the first transparent substrate, wherein the reflective layer is composed of a metal film containing a phosphorus component and the reflective layer has a hardness of 60 mgf/μm2 or more as nano indentation hardness.
An optical information recording medium comprising (A) a pair of disks, each comprising:
- (i) a first transparent substrate and (ii) layers including a dye recording layer and a reflective layer formed on the first substrate in this order, and (B) an adhesive layer which bonds the pair of disks wherein respective sides where the reflective layers are formed face each other, wherein information can be recorded on or reproduced from the respective dye recording layers by irradiation of light through the respective transparent substrates, each respective reflective layer being composed of a metal film containing a phosphorus component and having a hardness of 60 mgf/μm2 or more as nano indentation hardness.
Dependencies are inferred from the claim text.