JP2002074742A5 - - Google Patents

Description

[0113]
[Table 7]

Claims (9)

The light incident side includes a substrate, an information surface of a recording film of N layers in which information is recorded by an atomic arrangement change caused by irradiation of light, (N is an integer of 2 or more), N-1 spacer layers An information recording medium characterized in that the recording film thickness of the information surface is in the following relationship: information surface 1 ≦ information surface 2 ≦... Information surface N−1 ≦ information surface N . 2. The information recording medium according to claim 1, wherein the reflectance of the information surface 1 to the information surface N-1 is in the relationship of reflectance of amorphous state ≧ reflectance of crystalline state. The information recording medium according to any one of claims 1 to 2, wherein the thickness of the spacer layer is 13 μm or more and 27 μm or less. The information recording medium according to any one of claims 1 to 2, wherein a difference between the maximum thickness and the minimum thickness of the spacer layer is 14 μm or less. The information recording medium according to any one of claims 1 to 2, wherein the thickness of the substrate is 0.091 mm to 0.097 mm, and the thickness of the spacer layer is 7 μm to 13 μm. Information storage medium. The information recording medium according to any one of claims 1 to 2, wherein the difference between the maximum thickness and the minimum thickness of the substrate is 0.006 mm or less in thickness, and the maximum thickness and the minimum thickness of the spacer layer. An information recording medium characterized in that the difference is 6 μm or less in thickness. An information recording medium comprising a first substrate, a first recording film, a spacer layer, a second recording film, and a second substrate in the order in which light is incident, wherein the first recording film and A first reflective layer is provided between the spacer layer, and a second reflective layer is provided between the second recording film and the second substrate, and the first reflection is provided. An information recording medium characterized in that the reflectance of the layer is smaller than the reflectance of the second reflective layer. The information recording medium according to claim 7, wherein the transparent reflective layer is made of an oxide or a nitride. 9. The information recording medium according to claim 7, wherein the transparent reflection layer is a plurality of layers.