Information recording media
AssigneeMitsui Petrochemical Industries, Ltd.
InventorsKiyotaka Shindo, Koichi Igarashi, Kunihiko Mizumoto, Hidehiko Hashimoto
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Abstract
In accordance with the present invention, there are provided information recording media having a substrate and thereon a recording layer and a metallic layer, wherein the metallic layer is composed of an aluminum alloy containing (i) titanium and (ii) at least one metal selected from among chromium, niobium and magnesium. The information recording media thus provided are excellent in corrosion resistance and small in dependence of the recording power on linear velocity.
Claims14
An information recording medium comprising a substrate, a protecting layer, a recording layer and a metallic layer wherein the recording layer is a magnetooptical recording layer, and the metallic layer is composed of an aluminum alloy containing 0.1-9.5 atom % of titanium and 0.1-5 atom % of chromium based on all atoms constituting the aluminum alloy, the combined content of said titanium and chromium being not more than 10 atom %.
An information recording medium comprising a substrate, a protecting layer, a recording layer and a metallic layer wherein the recording layer is a magnetooptical recording layer, and the metallic layer is composed of an aluminum alloy containing 0.5-5 atom % of titanium and 0.5-5 atom % of niobium based on all atoms constituting the aluminum alloy, the combined content of said titanium and niobium being 1-5.5 atom %.
An information recording medium comprising a substrate, a protecting layer, a recording layer and a metallic layer wherein the recording layer is a magnetooptical recording layer, and the metallic layer is composed of an aluminum alloy containing 0.1-10 atom % of titanium, 0.1-10 atom % of magnesium and 0.1-10 atom % of chromium based on all atoms constituting the aluminum alloy, the combined content of said titanium, magnesium and chromium being not more than 15 atom %.
Dependencies are inferred from the claim text.