Metal alloys for the reflective or the semi-reflective layer of an optical storage medium
AssigneeTarget Technology Company, LLC
InventorHan H. Nee
Life of this patent
Estimating the term…
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.
Claims88
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first reflective layer adjacent said feature pattern, said first reflective layer 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.
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first reflective layer adjacent said feature pattern, said first reflective layer 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.
The optical storage medium of claim 19, wherein said optically re-recordable material is a phase-changeable material.
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first reflective layer adjacent said feature pattern, said first reflective layer 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.
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first reflective layer adjacent said feature pattern, said first reflective layer 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 AgxCuz,Aw where 0.85<x<0.9998, 0.0001<z<0.10, and 0.0001<w<0.05.
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first reflective layer adjacent said feature pattern, said first reflective layer 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.
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first reflective layer adjacent said feature pattern, said first reflective layer 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 Agx,CuzCow where 0.85<x<0.9998, 0.0001<z<0.10, and 0.0001<w<0.05.
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first reflective layer adjacent said feature pattern, said first reflective layer 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.
An optical storage medium, comprising:
- a first layer having a pattern of features in at least one major surface;
- and
- a first reflective layer adjacent said feature pattern, said first reflective layer 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.
Dependencies are inferred from the claim text.