Patent ID: 6063468
Filing Date: 2000-05-16
Classification: G11B,Y10S,Y10T

Abstract:
An optical recording medium, comprising:an optical recording medium,a substrate having a surface for recording information as pits and grooves;a recording layer formed adjacent said surface of said substrate; anda light transmissive layer formed adjacent said recording layer;wherein information is recorded and/or reproduced by irradiation of light from an optical pickup employing an objective lens having a numerical aperture of 0.7 or larger through said light transmissive layer, and wherein at least a surface of said light transmissive layer is formed of a material having a Young's modulus of 70 GPa or greater; andwherein said surface of said light transmissive layer is formed of a material containing at least one of C.sub.100-x H.sub.x (1 (atom %)<X<45 (atom %)), Si.sub.3 N.sub.4, MgF.sub.2, Al.sub.2 O.sub.3, and SiO.sub.2.