OPTICAL RECORDING MEDIUM AND METHOD FOR MANUFACTURING OPTICAL RECORDING MEDIUM

摘要

An object of the invention is to provide an optical recording medium and a method for producing an optical recording medium that enable to improve the quality of a servo signal and a reproduction signal. The optical recording medium (40) satisfies: t3-t4 ‰§ 1 µm, t4-t2 ‰§ 1 µm, t2 ‰§ 10 µm, and t1-(t2+t3+t4)‰§ 1 µm, where t1 is a thickness between a surface (40z) of the optical recording medium (40), and the first information recording surface (40a), t2 is a thickness between the first optical recording surface (40a) and the second information recording surface (40b), t3 is a thickness between the second optical recording surface (40b) and the third information recording surface (40c), and t4 is a thickness between the third optical recording surface (40c) and the fourth information recording surface (40d).