| 摘要 |
<p>The object of the present invention is to find a Ag based alloy which exhibits high cohesion resistance, high light resistance, high heat resistance, high reflectivity, high transmissivity, low absorptivity, and high thermal conductivity of the level which had not been realized by the pure Ag or by the conventional Ag alloys, and on the bases of such alloy, to provide a semi-reflective film and a reflective film for an optical information recording medium provided with excellent writing/reading properties and long term reliability; sputtering target for an optical information recording medium used in depositing such semi-reflective film and the reflective film; and an optical information recording medium provided with such semi-reflective film or the reflective film. A semi-reflective film or reflective film for an optical information recording medium comprising a Ag based alloy, wherein the Ag based alloy comprises 0.005 to 0.40% (at% unless otherwise noted) of Bi and 0.05 to 5% in total of at least one element selected from Zn, Al, Ga, In, Si, Ge, and Sn, has been provided.</p> |
