Patent ID: 6031813
Filing Date: 2000-02-29
Classification: C09K,G11B,Y10S,Y10T

Abstract:
An optical disk medium comprising:a first substrate having a first information surface,a semitransparent reflection film formed on the first information surface of the first substrate,a second substrate having a second information surface,a reflection film formed on the second information surface of the second substrate, andan adhesive layer for adhering the first substrate and the second substrate so that the first information surface and the second information surface face each other,wherein the thickness of the first substrate is at least 0.56 mm,the thickness of the adhesive layer is at least 30 .mu.m, andthe total thickness of the first substrate and the adhesive layer is in the range of 0.59 mm to 0.68 mm, anda reflectance of the semitransparent reflection film is in the range of 20% to 35%.