Optical recording medium

Abstract

Information is recorded on or reproduced from an optical recording medium (10) with irradiation of light from the opposite side of a substrate (2). In this optical recording medium (10), a reflection layer (6) is deposited on the substrate (2). This reflection layer (6) is made of an AgPdCu alloy thin layer or an AgPdCuAl alloy thin layer. A surface roughness (Ra) of this reflection layer (6) is less than 0.75 nm. A dielectric layer (3) is deposited on this reflection layer (6), and a heat control layer (1) is deposited on this dielectric layer (3). This heat control layer (1) is made of an AgPdCu alloy thin layer. A surface roughness (Ra) of this heat control layer (1) is less than 0.75 nm. A recording layer (4), a dielectric layer (5) and an organic protection layer (7) are deposited on this heat control layer (1). This optical recording medium can improve heat characteristics and reduce a disk noise.

Dependencies are inferred from the claim text.