Patent ID: 6999396

Claim:
An initialization method of an optical recording medium, wherein a second optical recording layer and a first optical recording layer are stacked via an interlayer on a substrate in an order, a protective layer is formed further on said first optical recording layer, a recording film in said first optical recording layer comprises a phase change type recording material, and a recording/reproducing light is irradiated from said protective film side at the time of recording/reproducing, wherein: in a step of initializing by irradiating an initializing light on said first optical recording layer from said protective film side, said first optical recording layer is initialized so that an energy density ID 1 per unit area of an incident light of said initializing light at respective points in a light convergence region on the first optical recording layer and an energy density ID 2 per unit area at the respective points of said light convergence region of a return light, which is said initializing light transmitted through said first optical recording layer to reach said second optical recording layer, reflected on the second optical recording layer and again returned to said first optical recording layer, satisfy a formula (1) below. ID 2 / ID 1 ≦0.002 (1)