Patent ID: 6243327
Filing Date: 2001-06-05
Classification: B82Y,G11B

Abstract:
In a magneto-optical recording medium system to conduct at least one of recording and reproduction by irradiating a light onto a magneto-optical recording medium through a convergent lens having a numerical aperture (N. A.) of not less than 1, the magneto-optical recording medium comprising:a substrate;a metallic reflection layer;a back dielectric layer;a magneto-optical recording layer; anda light transmitting dielectric layer,where the metallic reflection layer, the back dielectric layer, the magneto-optical recording layer, and the light transmitting dielectric layer are sequentially provided on the substrate and are adapted to be irradiated with the light from a side of the light transmitting dielectric layer andwhere the light transmitting dielectric layer defines a thickness of50 to 80 nanometers (nm).