| 摘要 |
<p>A data recording medium such as a photomagnetic disk that is capable of optically recording and reproducing the data. The data recording medium comprises a data recording film (3) composed chiefly of a metal on at least one side of a flat plate-like substrate (1), and protective films (2, 4) including a dielectric film that covers at least one surface of the substrate. The dielectric film is chiefly composed of aluminum, nitrogen and oxygen, the content of oxygen ranging from 3 % to 25 % in terms of the number of atoms. There is obtained a data recording medium having excellent resistance against the development of cracks and moisture and being free from deterioration of the recording film due to oxidation.</p> |
