Optical information recording medium

Details Optical information recording medium Optical information recording medium

2007-09-25

2010-12-28

Blouin, Mark (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Layered

Reexamination Certificate

active

07859984

ABSTRACT:
An optical information recording medium includes a dielectric layer and an Ag-based reflection layer or an Ag-based metal semitransparent layer adjacent to the dielectric layer. The dielectric layer contains niobium oxide between 50 mol % and 75 mol %, zinc sulfide between 10 mol % and 30 mol %. The dielectric layer further contains an additive which is at least one of or a mixture of at least two of the following materials: aluminum oxide, tantalum oxide, silicon oxide, cerium oxide, yttrium oxide, hafnium oxide and bismuth oxide. By this structure layers, an Ag-based reflection layer or Ag-based metal semitransparent layer can apply to a phase-change optical disc without requiring a layer for preventing the Ag-based layer from sulfurization. An optical information recording medium having high productivity can be provided.

REFERENCES:
patent: 7623434 (2009-11-01), Kimura et al.
patent: 2006/0092815 (2006-05-01), Kimura et al.
patent: 2002-92950 (2002-03-01), None
patent: 2002-144736 (2002-05-01), None
patent: 2003-94819 (2003-04-01), None
patent: 2005-302264 (2005-10-01), None

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