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US 2006/0188685 A1Published application
Metal alloys for the reflective or the semi-reflective layer of an optical storage medium
AssigneeTarget Technology Company, LLC
InventorHan Nee
Life of this patent
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Abstract
A silver-based alloy thin film is provided for the highly reflective or the semi-reflective layer of optical discs. Alloy additions to silver include magnesium, gold, rhodium, ruthenium, osmium, platinum, palladium, copper, silicon, cadmium, tin, lithium, nickel, cobalt, manganese, indium, chromium, antimony, gallium, boron, molybdenum, zirconium, beryllium, titanium, aluminum, germanium and zinc. These alloys have moderate to high reflectivity and reasonable corrosion resistance in ambient environments.
Claims71
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- a semi-reflective layer adjacent the pattern of features in said first layer, the semi-reflective layer including a metal alloy, said metal alloy including silver, Zinc and magnesium, wherein the relationship between the amounts of silver, indium and magnesium in said metal alloy is defined by AgxZnyMgz, wherein 0.8<x<0.9998, 0.0001<y<0.1 and 0.0001<z<0.1;
- a second layer having a pattern of features in at least one major surface;
- and
- a reflective layer adjacent the pattern of features in said second layer.
2 more elements
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- a semi-reflective layer adjacent the pattern of features in said first layer, the semi-reflective layer including a metal alloy, said metal alloy including silver, magnesium and at least one element A selected from the list consisting of gold, rhodium, ruthenium, osmium, iridium, platinum, palladium, copper, wherein the relationship between the amounts of silver, magnesium and element A is defined by AgxMgzAa, wherein 0.8<x<0.9998, 0.0001<z<0.1 and 0.0001<a<0.1;
- a second layer having a pattern of features in at least one major surface;
- and
- a reflective layer adjacent the pattern of features in said second layer.
2 more elements
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- a semi-reflective layer adjacent the pattern of features in said first layer, the semi-reflective layer including a metal alloy, said metal alloy including silver, magnesium and at least one element B selected from the list consisting of titanium, cadmium, lithium, nickel, cobalt, aluminum and germanium wherein the relationship between the amounts of silver, magnesium and element B in said metal alloy is defined by AgxMgzBb, wherein 0.8<x<0.9998, 0.0001<z<0.1 and 0.0001<b<0.1;
- a second layer having a pattern of features in at least one major surface;
- and
- a reflective layer adjacent the pattern of features in said second layer.
2 more elements
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 titanium, wherein the relationship between the amounts of silver and titanium in the metal alloy is defined by AgxTiw where 0.9000<x<0.9999 and 0.0001<w<0.10, wherein said reflective coating is about 60 nanometers thick or less.
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 manganese, wherein the relationship between the amounts of silver and manganese in the metal alloy is defined by AgxMnv where 0.9000<x<0.9999 and 0.0001<v<0.10, wherein said reflective coating is about 60 nanometers thick or less.
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, titanium, manganese and copper, wherein the relationship between the amounts of silver, titanium, manganese and copper, is defined by AgxTiwMnvCuy where 0.70<x<0.9997, 0.0001<w<0.10, and 0.0001<v<0.10, 0.0001<y<0.10, wherein said reflective coating is about 60 nanometers thick or less.
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 indium, wherein the relationship between the amounts of silver and indium in the metal alloy is defined by AgxIni where 0.9000<x<0.9999 and 0.0001<i<0.10, wherein said reflective coating is about 60 nanometers thick or less.
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, indium and tin wherein the relationship between the amounts of silver, indium and tin in the metal alloy is defined by AgxIniSns, where 0.9000<x<0.9999, 0.0001<i<0.10 and 0.0001<s<0.10 wherein said reflective coating is about 60 nanometers thick or less.
Dependencies are inferred from the claim text.