Patent ID: 7479363
Filing Date: 2009-01-20
Classification: G11B,Y10S

Abstract:
1. An optical recording medium comprising: a substrate; a reflective layer overlying the substrate; a first recording layer formed overlying the reflective layer and containing Al as a primary component; a second recording layer disposed on top of and being in contact with the first recording layer and containing an element selected from the group consisting of Si, C, Sn, and Zn as a primary component, the total thickness of the first recording layer and the second recording layer being 2 nm to 20 nm; a first dielectric layer overlying the second recording layer; a second dielectric layer being disposed between the reflective layer and both the first and second recording layers; and a light transmission layer disposed on top of and in contact with the first dielectric layer, the light transmission layer transmifting therethrough an incoming laser beam toward the first recording layer and the second recording layer, the optical recording medium being constituted so as to be irradiated by a laser beam projected onto the light transmission whereby, upon irradiation, the primary component contained in the first recording layer and the primary component contained in the second recording layer are mixed with each other to irreversibly form a mixed region.