Optical recording medium and method of using the same

摘要

On one surface of a disk substrate (1), a first dielectric layer (2), a thin recording layer (3), a second dielectric layer (4) and a reflecting layer (5) are cumulatively formed. The second dielectric layer (4) is thinner than the first dielectric layer (2) and is 35-70nm thick. The reflecting layer (5) is 70-120nm thick. The total thickness of the four layers is 250-430nm. The compressive stress of the layers is offset by tensile stress generated by an overcoat resin protective layer (6), formed on the reflecting layer(5). A method of using the optical recording medium applies the MCAV (Modified Constant Angular Velocity) recording method which records information by changing recording frequencies in accordance with linear velocity. The linear velocity is 5-12m/s. A ratio of an inner circumference recording pulse width to an outer circumference recording pulse width is 1.2 or more.