Metal alloys for the reflective or the semi-reflective layer of an optical storage medium
First Claim
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1. An optical storage medium, comprising:
- a first layer having a first pattern of features in at least one major surface;
a semi-reflective layer, said semi-reflective layer including a metal alloy, said metal alloy including silver and copper, wherein the relationship between the amounts of silver and copper in the metal alloy is defined by AgxCuy where 0.95<
x<
0.9999 and 0.0001<
y<
0.05;
a second layer having a second pattern of features in at least one major surface; and
a high reflective layer.
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Abstract
Metal alloy thin films are provided for use in the highly reflective and semi-reflective layers of optical discs. Alloys include silver alloyed with gold, palladium, copper, rhodium, ruthenium, osmium, iridium, and platinum. Other alloys include copper alloys with silver, magnesium, cadmium, aluminum, nickel, beryllium, zirconium and zinc. These alloys have moderate to high reflectivity and reasonable corrosion resistance in the ambient environment.
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Citations
10 Claims
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1. An optical storage medium, comprising:
-
a first layer having a first pattern of features in at least one major surface; a semi-reflective layer, said semi-reflective layer including a metal alloy, said metal alloy including silver and copper, wherein the relationship between the amounts of silver and copper in the metal alloy is defined by AgxCuy where 0.95<
x<
0.9999 and 0.0001<
y<
0.05;a second layer having a second pattern of features in at least one major surface; and a high reflective layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification