Optical recording medium and optical recording method
OwnerShuji TSUKAMOTO, Hiroyasu Inoueinventors
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Abstract
An optical recording medium having a good power margin during recording is provided. In an optical recording medium, a Cu recording layer that includes Cu as a main component, a first Si recording layer that is arranged adjacent to the cover layer side of the Cu recording layer and includes Si as a main component, and a second Si recording layer that is arranged adjacent to the substrate side of the Cu recording layer and includes Si as a main component, are stacked between the substrate and the cover layer.
Claims15
An optical recording medium comprising:
- a substrate;
- a cover layer;
- a Cu recording layer that is arranged between the substrate and the cover layer and includes Cu as a main component;
- a first Si recording layer that is arranged adjacent to a cover layer side of the Cu recording layer and includes Si as a main component;
- and
- a second Si recording layer that is arranged adjacent to a substrate side of the Cu recording layer and includes Si as a main component.
An optical recording method for recording information by irradiating a laser beam on an optical recording medium having an information recording layer between a substrate and a cover layer, the method comprising:
- providing, as the information recording layer, a Cu recording layer that includes Cu as a main component, a first Si recording layer that is arranged adjacent to a cover layer side of the Cu recording layer and includes Si as a main component, and a second Si recording layer that is arranged adjacent to a substrate side of the Cu recording layer and includes Si as a main component;
- and
- chemically or physically modifying the Cu recording layer, the first Si recording layer, and the second Si recording layer simultaneously by heat from the laser beam.
Dependencies are inferred from the claim text.