Optical recording medium and method for optically recording data in the same

A method for optically recording data comprising a step of projecting a laser beam of predetermined power onto the side opposite from a substrate of an optical recording medium comprising the substrate, a first recording layer containing an element selected from the group consisting of Si, C, Sn, and Zn as a primary component, a second recording layer located in the vicinity of the first recording layer and formed overlying the substrate and between the first recording layer and the substrate, the second recording layer containing Al as a primary component, a first dielectric layer overlying the first recording layer, and a second dielectric layer being disposed between the substrate and the second recording layer, a reflective layer provided between the substrate and the second dielectric layer, the optical recording medium being constituted to be irradiated by a laser beam projected onto the side opposite from the substrate, whereby upon irradiation, the primary component contained in the first recording layer and the primary component contained in the second layer are mixed with each other to irreversibly form a mixed region, and the total thickness of the first recording layer and the second recording layer being 2 nm to 20 nm.

A method for optically recording data, comprising:

• projecting a laser beam of predetermined power and having a wavelength of 450 nm or shorter onto the side opposite from a substrate of an optical recording medium comprising the substrate, a first recording layer containing an element selected from the group consisting of Si, C, Sn, and Zn as a primary component, and a second recording layer located in the vicinity of the first recording layer and formed overlying the substrate and between the recording layer and the substrate, the second recording layer containing Al as a primary component, a first dielectric layer overlying the first recording layer, and a second dielectric layer being disposed between the substrate and the second recording layer, a reflective layer provided between the substrate and the second dielectric layer, the optical recording medium being constituted to be irradiated by a laser beam projected onto the side opposite from the substrate, and the total thickness of the first recording layer and the second recording layer being 2 nm to 20 nm;
• and
• mixing the primary component contained in the first recording layer and the primary component contained in the second layer with each other upon the irradiation to irreversibly form a mixed region, thereby recording data in the first recording layer and the second recording layer.