Patent ID: 8815364
Filing Date: 2014-08-26
Classification: G11B,Y10T

Abstract:
1. An optical information recording medium, comprising a recording film on which information is recorded by irradiation with a light beam, wherein the recording film contains germanium, bismuth, and at least 50 at % tellurium, and has: a first recording film component formed in the planar direction and having a bismuth content of at least 15 at %; a second recording film component formed in the planar direction on the side irradiated with the light beam, and having a bismuth content that is at least 10 at % lower than that of the first recording film component; and one or more intermediate recording film components provided between the first recording film component and the second recording film component in order to moderate the change in the bismuth content in the film thickness direction between the first recording film component and the second recording film component, and having a bismuth content that is greater than the bismuth content of the second recording film component and is less than the bismuth content of the first recording film component.