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US 8,663,772 B2Granted
Minute structure and information recording medium
AssigneeRicoh Company, Ltd.
InventorTetsuji Mori
Life of this patent
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Abstract
There is disclosed a minute structure including a sulfur compound and a silicon oxide. There is also disclosed a write-once information recording medium including a substrate and a recording layer formed of a mixed inorganic material and deposited on the substrate, wherein the mixed inorganic material contains a sulfur compound and a silicon oxide.
Claims1
An optical recording medium, comprising:
- a substrate;
- a light absorption layer on the substrate;
- and
- a minute structure on the light absorption layer, wherein the substrate, the light absorption layer, and the minute structure are arranged in the order recited,
- wherein the minute structure is a recording mark and the minute structure comprises:
- a sulfur compound;
- a silicon oxide;
- and
- a material for raising an optical absorption ability to a light with a predetermined wavelength,
- wherein the molar percentage of the silicon oxide in the minute structure is in the range of between 10 mol % and 30 mol %,
- wherein the minute structure has a diameter in the range of 80-450 nm,
- wherein the material for raising the optical absorption ability to the light with the predetermined wavelength comprises:
- at least one of ZnTe, ZnSe or MnS;
- and
- a fluorescent material, and
- wherein the minute structure is a mixture of the sulfur compound, the silicon oxide, and the material for raising the optical absorption ability to the light with the predetermined wavelength.
13 more elements
Dependencies are inferred from the claim text.