Patent ID: 7501225
Filing Date: 2009-03-10
Classification: G11B,Y10S

Abstract:
1. A method for manufacturing an optical recording medium comprising: irradiating at least a portion of a medium for forming a structure with light so as to change at least a portion of a first thermal reaction layer by heat generation in a light absorption layer; and performing a first etching to etch the medium for forming a structure so as to leave the changed portion in the first thermal reaction layer and to form a plurality of convex structures, wherein the medium for forming a structure comprises: the light absorption layer; and the first thermal reaction layer, wherein the first thermal reaction layer is disposed on the light absorption layer in order to form the plurality of convex structures, and wherein the first thermal reaction layer comprises a mixture of a material A and a material B, wherein the material A is a silicon compound material and the material B is at least one selected from a sulfide material and a selenide material, and wherein the manufactured optical recording medium comprises: the light absorption layer; and the plurality of convex structures, wherein the light absorption layer generates heat by light absorption and the plurality of convex structures are disposed on the light absorption layer, wherein the plurality of convex structures are shaped such that edges of a vertical cross section are approximately vertical and such that a horizontal cross section is approximately circular, and wherein the plurality of convex structures comprise a mixture of a material A and a material B, wherein the material A is a silicon compound material and the material B is at least one selected from a sulfide material and a selenide material.