Optical recording medium
View Patent ↗The invention is principally to provide an archival optical recording medium of high quality which has satisfactory recording/reading characteristics when used in high-speed recording and high-density recording. The invention accomplishes the object with an optical recording medium comprising a resin substrate, a recording layer comprising an organic dye, and a reflective layer, wherein the reflective layer has a first reflective layer and a second reflective layer in this order from the side close to the recording layer, the second reflective layer has a thermal conductivity lower than the thermal conductivity of the first reflective layer, and the first reflective layer has a film thickness larger than the thickness of the second reflective layer.
1. An optical recording medium, comprising:
a resin substrate;
a recording layer comprising an organic dye; and
a reflective layer;
wherein:
the reflective layer comprises a first reflective layer and a second reflective layer;
the first reflective layer is in direct contact with the recording layer;
the second reflective layer is in direct contact with the first reflective layer;
the second reflective layer has a thermal conductivity lower than a thermal conductivity of the first reflective layer;
the first reflective layer comprises silver as a main component; and
the second reflective layer comprises gold as a main component.
2. The optical recording medium according to claim 1 , wherein a film thickness of the second reflective layer is in a range of from 1 nm to 50 nm.
3. The optical recording medium according to claim 1 , wherein a film thickness of the second reflective layer is in a range of from 10 nm to 50 nm.
4. The optical recording medium according to claim 1 , wherein a film thickness of the first reflective layer is in a range of from 50 nm to 200 nm.
5. The optical recording medium according to claim 2 , wherein a film thickness of the first reflective layer is in a range of from 50 nm to 200 nm.
6. The optical recording medium according to claim 3 , wherein a film thickness of the first reflective layer is in a range of from 50 nm to 200 nm.
7. The optical recording medium according to claim 1 , wherein a film thickness of the first reflective layer is in a range of from 50 nm to 150 nm.
8. The optical recording medium according to claim 2 , wherein a film thickness of the first reflective layer is in a range of from 50 nm to 150 nm.
9. The optical recording medium according to claim 3 , wherein a film thickness of the first reflective layer is in a range of from 50 nm to 150 nm.