| 摘要 |
PURPOSE:To obtain an optical disk having high stability and high sensitivity, by using that which contains one among S, Se, Sb, C, Si, etc., and Te, as a recording film, and changing the composition in the film thickness direction of the recording layer. CONSTITUTION:Two disks 24, 26 are opposed with its recording films 23, 25 inside, and are made to adhere to the inside circumference and the outside circumference by placing spacers 21, 22 between, by which an enclosed structure is obtained. In order to obtain stable ones as these recording films 23, 25, those which contain one element selected from S, Se, Sb, C, Si, Ge and Sn, and Te are used. Also, the composition is changed in the film thickness direction of this recording layer, and on at least one of the substrate side of the recording layer or the vicinity of the end part of the surface side, an area which contains more oxygen than its mean content is provided. |
