Optical recording medium
AssigneePioneer Corporation
InventorTakanobu Higuchi
Life of this patent
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Abstract
To present an optical recording medium having four or more information recording planes which can be read from one side. A first reflective layer 3 has a layer mainly composed of titanium oxide, a second reflective layer 5 has a layer mainly composed of titanium oxide, a third reflective layer 7 has a layer of an alloy mainly composed of silver, and a fourth reflective layer 9 has a layer of an alloy mainly composed of aluminum.
Claims9
An optical recording medium readable from one side comprising at least four information recording planes and reflective layers formed on each information recording plane, respectively, wherein the first and the second reflective layer has a layer mainly composed of titanium oxide, the third reflective layer has a layer made of an alloy mainly composed of silver or a layer formed by laminating the layer of alloy mainly composed of silver and a layer mainly composed of titanium oxide, and the fourth reflective layer has a layer made of an alloy mainly composed of aluminum.
Dependencies are inferred from the claim text.