Patent ID: 7494700
Filing Date: 2009-02-24
Classification: G11B,Y10T

Abstract:
1. An optical information recording medium comprising: a substrate; an oxynitride dielectric layer and an information recording layer overlying the substrate, a first dielectric layer formed overlying the information recording layer; and at least one reflection layer formed overlying the first dielectric layer, the reflection layer being adapted to reflect light irradiated from outside and transmitted through the substrate, the oxide/nitride dielectric layer, the information recording layer and the first dielectric layer toward the information recording layer, the oxynitride dielectric layer being made of an Si-based oxynitride containing Si as a principal ingredient and at least one element selected from the group consisting of Ni, Ti, Cr, Co, Ta, Cu and C as an auxiliary ingredient added to the principal ingredient, wherein the oxynitride dielectric layer has a refractive index from 1.43 to 1.8.