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; and
a first semi-reflective coating adjacent the feature pattern, the first semi-reflective coating including a metal alloy, said metal alloy including silver; and
an element A, wherein element A is selected from the group consisting of, cadmium, lithium, cobalt, indium, chromium, antimony, gallium, boron, molybdenum, zirconium, and beryllium, and wherein the relationship between the amounts of silver and element A in the metal alloy is defined by AgxAy, wherein 0.9<
x<
0.9999, and 0.0001<
y<
0.10.
1 Assignment
0 Petitions
Accused Products
Abstract
A silver-based alloy thin film is provided for the highly reflective or semi-reflective layer of optical discs. Alloy additions to silver include gold, rhodium, ruthenium, osmium, platinum, palladium, copper, silicon, cadmium, tin, lithium, nickel, cobalt, indium, chromium, antimony, gallium, boron, molybdenum, zirconium, beryllium, titanium, and zinc. These alloys have moderate to high reflectivity and reasonable corrosion resistance in the ambient environment.
-
Citations
41 Claims
-
1. An optical storage medium, comprising:
-
a first layer having a pattern of features in at least one major surface; and
a first semi-reflective coating adjacent the feature pattern, the first semi-reflective coating including a metal alloy, said metal alloy including silver; and
an element A, wherein element A is selected from the group consisting of, cadmium, lithium, cobalt, indium, chromium, antimony, gallium, boron, molybdenum, zirconium, and beryllium, and wherein the relationship between the amounts of silver and element A in the metal alloy is defined by AgxAy, wherein 0.9<
x<
0.9999, and 0.0001<
y<
0.10. - View Dependent Claims (2, 3, 6)
-
-
4. An optical storage medium comprising:
-
a first layer having a pattern of features in at least one major surface; and
a first semi-reflective coating adjacent the feature pattern, the first semi-reflective coating including a metal alloy, said metal alloy including silver, copper, and, zinc, and wherein the relationship between the amounts of silver, copper, and zinc in the metal alloy is defined by AgxCuwZnz where 0.8<
x<
0.9998,0.0001<
w<
0.1, 0.0001<
z<
0.1.
-
-
5. An optical storage medium comprising:
-
a first layer having a pattern of features in at least one major surface; and
a first semi-reflective coating adjacent the feature pattern, the first semi-reflective coating including a metal alloy, said metal alloy including silver, copper, and titanium, and wherein the relationship between the amounts of silver, copper and titanium in the metal alloy is defined by AgxCuwTit wherein 0.85<
x0.9998, 0.0001<
w<
0.1, 0.0001<
t<
0.05.
-
-
7. An optical storage medium comprising:
-
a first layer having a pattern of features in at least one major surface; and
a first semi-reflective coating adjacent the feature pattern, the first semi-reflective coating including a metal alloy, said metal alloy including silver, copper, and silicon, and wherein the relationship between the amounts of silver, copper, and, silicon in the metal alloy is defined by AgxCuwSis wherein 0.85<
x<
0.9998, 0.0001<
w<
0.1, 0.0001<
s<
0.05.
-
-
8. An optical information recording medium, comprising:
-
a first substrate;
a first recording layer adjacent said first substrate; and
a first semi-reflective coating adjacent the first recording layer, the first semi-reflective coating including a metal alloy;
said metal alloy including silver and element A, wherein element A is selected from the group consisting of copper, zinc, titanium, cadmium, lithium, nickel, cobalt, indium, aluminum, chromium, germanium, tin, beryllium, manganese, antimony, gallium, silicon, boron, zirconium, and molybdenum and, wherein the relationship between the amounts of silver and element A in the metal alloy is defined by AgxAy wherein 0.9<
0.9999, and 0.0001<
y<
0.10. - View Dependent Claims (9, 10, 11, 13)
-
-
12. An optical information recording medium comprising:
-
a first substrate;
a first recording layer adjacent said first substrate; and
a first semi-reflective coating adjacent the first recording layer, the first semi-reflective coating including a metal alloy, said metal alloy including silver, copper, and, zinc, and wherein the relationship between the amounts of silver, copper, and zinc in the metal alloy is defined by AgxCuwZnz wherein 0.8<
x<
0.9998, 0.0001<
w<
0.1, 0.0001<
z<
0.1.
-
-
14. An optical storage medium, comprising:
-
a first substrate having a pattern of features in at least one major surface;
a semi-reflective coating adjacent the feature pattern, the first semi-reflective coating including a metal alloy;
said metal alloy including silver and copper, and wherein the relationship between the amounts of silver and copper in the metal alloy is defined by AgxCuy wherein 0.90<
x<
0.999, 0.001<
y<
0.10;
a second substrate having a pattern of features in at least one major surface;
a highly reflective layer adjacent the second feature pattern of said second substrate; and
at least one spacer layer, located between said semi-reflective coating and said highly reflective layer. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
-
21. An optical storage medium comprising:
-
a first layer having a pattern of features in at least one major surface; and
a first semi-reflective coating adjacent the first layer, the first semi-reflective coating including a first metal alloy, said first metal alloy including silver and manganese, and wherein the relationship between the amounts of silver and manganese in said first metal alloy is defined by AgxMnq where 0.90<
x<
0.9999 and 0.0001<
q <
0.10. - View Dependent Claims (22, 23)
-
-
24. An optical storage medium comprising:
-
a first layer having a pattern of features in at least one major surface; and
a first semi-reflective coating adjacent the first layer, the first semi-reflective coating including a first metal alloy, said first metal alloy including silver and zinc, and wherein the relationship between the amounts of silver and zinc in said first metal alloy is defined by AgxZnz where 0.85<
x<
0.9999 and 0.0001<
z<
0.15. - View Dependent Claims (25, 26)
-
-
27. An optical storage medium comprising:
-
a first layer having a pattern of features in at least one major surface; and
a first semi-reflective coating adjacent the first layer, the first semi-reflective coating including a first metal alloy, said first metal alloy including silver and silicon, and wherein the relationship between the amounts of silver and silicon in said first metal alloy is defined by AgxSis where 0.90<
x<
0.9999 and 0.0001<
s<
0.10. - View Dependent Claims (28, 29)
-
-
30. An optical storage medium comprising:
-
a first layer having a pattern of features in at least one major surface; and
a first semi-reflective coating adjacent the first layer, the first semi-reflective coating including a first metal alloy, said first metal alloy including silver and tin, and wherein the relationship between the amounts of silver and tin in said first metal alloy is defined by AgxSnq where 0.90<
x<
0.9999 and 0.0001<
p<
0.10. - View Dependent Claims (31, 32)
-
-
33. An optical storage medium comprising:
-
a first layer having a pattern of features in at least one major surface; and
a first semi-reflective coating adjacent the first layer, the first semi-reflective coating including a first metal alloy, said first metal alloy including silver and nickel, and wherein the relationship between the amounts of silver and nickel in said first metal alloy is defined by AgxNir where 0.90<
x<
0.9999 and 0.0001<
r<
0.10. - View Dependent Claims (34, 35)
-
-
36. An optical storage medium comprising:
-
a first layer having a pattern of features in at least one major surface; and
a first semi-reflective coating adjacent the first layer, the first semi-reflective coating including a first metal alloy, said first metal alloy including silver and titanium, and wherein the relationship between the amounts of silver and titanium in said first metal alloy is defined by AgxTip where 0.90<
x<
0.9999 and 0.0001<
p <
0.10. - View Dependent Claims (37, 38)
-
-
39. An optical storage medium comprising:
-
a first layer having a pattern of features in at least one major surface; and
a first semi-reflective coating adjacent the first layer, the first semi-reflective coating including a first metal alloy, said first metal alloy including silver and germanium, and wherein the relationship between the amounts of silver and germanium in said first metal alloy is defined by AgxGeu where 0.90<
x<
0.9999 and 0.0001<
u<
0.10. - View Dependent Claims (40, 41)
-
Specification