| 摘要 |
PURPOSE:To prevents the oxidative corrosion of a magnetic film and to permit stable high-density recording and reproduction by consisting a protective film of the nitride of the group III-V elements of periodic table except silicon. CONSTITUTION:The protective film is constituted of the nitride of the group III, IVor V elements (except silicon) of the periodic table having an excellent effect of preventing oxidation deterioration. Various sputtering methods, CVD methods, ion plating methods, etc. are adopted as the methods for forming the protective film. The recording and reproduction are executed by irradiating modulated or deflected laser light from the substrate side or the opposite side. |
