| 摘要 |
PURPOSE:To prevent a film from causing cracking and a recording film from undergoing oxidation and corrosion by forming a protective film contg. a specified element, Si and N on a base sheet and then forming a recording layer. CONSTITUTION:After a reactive sputtering is performed by using an alloy target consisting of Si and one or more elements selected from Ni, Pt, Pd, Cu, Tc, Ru, Rh, Ag, Ir and Au as a cathode in a mixed gas of an inert gas and N on a transparent base sheet 2 to form a protective layer 3 contg. said element, Si and N with a reactive index of 2 or more, an extinction coefficient of 0.1 or smaller, a recording layer 4 is formed to obtain an optical recording medium 1. |
