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US 2004/0018334 A1Published application
Metal alloys for the reflective or the semi-reflective layer of an optical storage medium
OwnerHan H. Neeinventor
Life of this patent
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Abstract
A silver-based alloy thin film is provided for the highly reflective or semi-reflective coating layer of optical discs. Alloy additions to silver include zinc, aluminum, zinc plus aluminum, manganese, germanium, and copper plus manganese. These alloys have moderate to high reflectivity and reasonable corrosion resistance in the ambient environment.
Claims79
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first coating adjacent the first layer, the first coating including a first metal alloy;
- wherein the first metal alloy includes silver and zinc;
- and wherein the relationship between the amounts of silver and zinc is defined by AgxZny where 0.85<x<0.9999 and 0.0001<y<0.15.
2 more elements
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first coating adjacent the first layer, the first coating including a first metal alloy;
- wherein the first metal alloy includes silver and aluminum;
- and wherein the relationship between the amounts of silver and aluminum is defined by AgxAlz where 0.95<x<0.9999 and 0.0001<z<0.05.
2 more elements
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first coating adjacent the first layer, the first coating including a first metal alloy;
- wherein the first metal alloy includes silver, zinc and aluminum;
- and wherein the relationship between the amounts of silver, zinc and aluminum is defined by AgxZnyAlz where 0.80<x<0.998, 0.001<y<0.15, and 0.001<z<0.05.
2 more elements
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first coating adjacent the first layer, the first coating including a first metal alloy;
- the first metal alloy including silver and manganese wherein the relationship between the amounts of silver and manganese is defined by AgxMnt where 0.925<x<0.9999 and 0.0001<t<0.075.
1 more element
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first coating adjacent the first layer, the first coating including a first metal alloy;
- the first metal alloy including silver and germanium wherein the relationship between the amounts of silver and germanium is defined by AgxGeq where 0.97<x<0.9999 and 0.0001<q<0.03.
1 more element
An optical storage medium, comprising:
- a first layer having a pattern of features in at least,one major surface;
- and
- a first coating adjacent the first layer, the first coating including a first metal alloy;
- wherein the first metal alloy includes silver, copper and manganese;
- and wherein the relationship between the amounts of silver, copper and manganese is defined by AgxCupMnt where 0.825<x<0.9998, 0.0001<p<0.10, and 0.0001<t<0.075.
2 more elements
Dependencies are inferred from the claim text.