| 摘要 |
PROBLEM TO BE SOLVED: To read the graphic information recorded on the rear surface of a rear surface disk via a front surface disk by adhering the rear surface of the front surface disk deposited with a semi-reflective film by evaporation on the front surface and the rear surface of the rear surface disk deposited with a reflective film by evaporation on the front surface to each other. SOLUTION: The DVD 10' is formed by adhering the rear surface disk 30' by an adhesive 40 to the front surface disk 20'. The front surface disk 20' records program information by using the local change of a distance from the front surface 22a' to the front surface 22b'. The semi-reflective film 24' is deposited by evaporation on the front surface 22b'. The rear surface disk 30' records the excess program information by using the local change of the distance from the front surface 32a' to the front surface 32b' on the portion 34' of the front surface 32b'. The reflective film 36' is deposited by evaporation on the front surface 32b'. The DVD 10' records the readable graphic information via the front surface disk 20' and the semi-reflective film 24' on the portion 38' of the front surface 32b' of the rear surface disk 30'. |
