| 摘要 |
PROBLEM TO BE SOLVED: To obtain an optical disk having optical properties equal to which in the case of optically forming a projecting and recessed recording pit without causing defect due to the transfer of a recording pit by making at least one or more recording layers of the optical disk made of a material to be changed in reflectance by heat. SOLUTION: The optical disk is manufactured by constituting the 1st recording layer so as to form a reflecting film 2 on a transparent substrate, on which the projecting and recessed pit responding to recording information is formed, constituting the 2nd recording layer so as to form a reflection film 4 with an intermediate UV layer 3 composed of an ultraviolet ray setting resin and further laminating to form a protective film 5. The reflection film 4 is made of the material to be changed in reflectance by heat. The recording information is reproduced by irradiating the reflection film 4 with an optical output laser responding to the information required to record to change the reflectance at the irradiated part. As a result, the optical disk having the optical property equal to which in the case of forming the projecting and recessed recording pit is obtained without causing defect due to the transfer of the recording pit. |
