Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 10, 2009
Patent Application Number
11557831
Date Filed
November 8, 2006
Patent Primary Examiner
Patent abstract
A write-once optical disk comprises a substrate, a recording layer which is stacked on the substrate and comprised of a first reaction layer comprised of a material containing hydrogen and a second reaction layer comprised of a material having an extinction coefficient greater than that in the first reaction layer, and a protective layer which is stacked on the recording layer.
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