Metal alloys for the reflective or the semi-reflective layer of an optical storage medium
First Claim
Patent Images
1. An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
a reflective coating;
said reflective coating including a metal alloy, said metal alloy including silver and yttrium, wherein the relationship between the amounts of silver and yttrium in the metal alloy is defined by AgxYw where 0.9500<
x<
0.9999 and 0.0001<
w<
0.05, wherein said reflective coating is about 60 nanometers thick or less.
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Accused Products
Abstract
A silver-based alloy thin film is provided for the highly reflective or semi-reflective coating layer of optical discs. Elements that can be added to silver to produce useful silver alloys include zinc, aluminum, copper, manganese, germanium, yttrium, bismuth, scandium, and cobalt. These alloys have moderate to high reflectivity and reasonable corrosion resistance in the ambient environment.
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Citations
56 Claims
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1. An optical storage medium, comprising:
-
a first layer having a pattern of features in at least one major surface;
a reflective coating;
said reflective coating including a metal alloy, said metal alloy including silver and yttrium, wherein the relationship between the amounts of silver and yttrium in the metal alloy is defined by AgxYw where 0.9500<
x<
0.9999 and 0.0001<
w<
0.05, wherein said reflective coating is about 60 nanometers thick or less. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An optical storage medium, comprising:
-
a first layer having a pattern of features in at least one major surface;
a reflective coating;
said reflective coating including a metal alloy, said metal alloy including silver and scandium, wherein the relationship between the amounts of silver and scandium in the metal alloy is defined by AgxScw where 0.9500<
x<
0.9999 and 0.0001<
w<
0.05, wherein said reflective coating is about 60 nanometers thick or less. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An optical storage medium, comprising:
-
a first layer having a pattern of features in at least one major surface;
a reflective coating;
said reflective coating including a metal alloy, said metal alloy including silver and bismuth, wherein the relationship between the amounts of silver and bismuth in the metal alloy is defined by AgxBiw where 0.9500<
x<
0.9999 and 0.0001<
w<
0.05, wherein said reflective coating is about 60 nanometers thick or less. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. An optical storage medium, comprising:
-
a first layer having a pattern of features in at least one major surface;
a reflective coating;
said reflective coating including a metal alloy, said metal alloy including silver, copper, and element A, where A is selected from the group of elements consisting of yttrium, scandium, or bismuth, wherein the relationship between the amounts of silver, copper, and element A in the metal alloy is defined by AgxCuzAw where 0.85<
x<
0.9998, 0.0001<
z<
0.10, and 0.0001<
w<
0.05, wherein said reflective coating is about 60 nanometers thick or less. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. An optical storage medium, comprising:
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a first layer having a pattern of features in at least one major surface;
a reflective coating;
said reflective coating including a metal alloy, said metal alloy including silver, copper, and magnesium, wherein the relationship between the amounts of silver, copper, and magnesium in the metal alloy is defined by AgxCuzMgw where 0.85<
x<
0.9998, 0.0001<
z<
0.10, and 0.0001<
w<
0.05, wherein said reflective coating is about 60 nanometers thick or less. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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36. An optical storage medium, comprising:
-
a first layer having a pattern of features in at least one major surface;
a reflective coating;
said reflective coating including a metal alloy, said metal alloy including silver, copper, and cobalt, wherein the relationship between the amounts of silver, copper, and cobalt in the metal alloy is defined by AgxCuzCow where 0.85<
x<
0.9998, 0.0001<
z<
0.10, and 0.0001<
w<
0.05, wherein said reflective coating is about 60 nanometers thick or less. - View Dependent Claims (37, 38, 39, 40, 41, 42)
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43. An optical storage medium, comprising:
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a first layer having a pattern of features in at least one major surface;
a reflective coating;
said reflective coating including a metal alloy, said metal alloy including silver, zinc, and magnesium, wherein the relationship between the amounts of silver, zinc, and magnesium in the metal alloy is defined by AgxZnyMgw where 0.8000<
x<
0.9998, 0.0001<
y<
0.15, and 0.0001<
w<
0.05, wherein said reflective coating is about 60 nanometers thick or less. - View Dependent Claims (44, 45, 46, 47, 48, 49)
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50. An optical storage medium, comprising:
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a first layer having a pattern of features in at least one major surface;
a reflective coating;
said reflective coating including a metal alloy, said metal alloy including silver, zinc, and cobalt, wherein the relationship between the amounts of silver, zinc, and cobalt in the metal alloy is defined by AgxZnyCow where 0.8000<
x<
0.9998, 0.0001<
y<
0.15, and 0.0001<
w<
0.05, wherein said reflective coating is about 60 nanometers thick or less. - View Dependent Claims (51, 52, 53, 54, 55, 56)
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Specification