Optical recording material and method for producing same
AssigneeSony Corporation
InventorsJunichi Akamatsu, Masato Yamamura
Life of this patent
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Abstract
An optical recording medium in which a recording layer (4) on which optically readable data are recorded is formed on a rectangular base material (1), a protective layer (5) is formed by roll coating on the recording layer (4) and wherein the base material (1) on which the recording layer (4) and the protective layer (5) have been formed is cut into a predetermined shape. The protective layer (5) provided on the recording layer (4) is formed of a material having a low Young modulus and a lower thermal conductivity as compared with the base material.
Claims9
A method for producing a medium for optically storing records, comprising:
- a first step of forming a record layer on a first side of a rectangular base material;
- a second step of forming a first protective layer of a material by roll coating on the record layer formed in said first step;
- and
- a third step of dividing or cutting the base material, on which the record layer and the first protective layer are formed by said first and second steps, into predetermined shapes,
- wherein said first step comprises a first sub-step of forming a high reflectivity layer on the first side of the rectangular base material, a second sub-step of forming a resist layer on the high reflectivity layer formed by the first sub-step, a third sub-step of subjecting the high reflectivity layer and the resist layer to mask exposure, and a fourth sub-step of etching the high reflectivity layer subjected to mask exposure in the third sub-step, and
- wherein said material of said first protective layer has a lower Young modulus than the Young modulus of said base material.
Dependencies are inferred from the claim text.