Information recording medium and method for manufacturing the same
AssigneePanasonic Corporation
InventorsTakashi Nishihara, Akio Tsuchino, Rie Kojima, Noboru Yamada
Life of this patent
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Abstract
An information recording medium with high recording sensitivity and superior repeat overwriting capability. The information recording medium (15) comprising at least recording layer (104) recording and/or reproducing information through irradiation with a laser beam or application of an electric current, and second dielectric layer (106) on substrate (14), wherein the second dielectric layer (106) comprises M1 (provided that M1 is at least one element selected from Sc, Y, La, Gd, Dy and Yb) and O.
Claims32
An information recording medium comprising at least a recording layer that records and/or reproduces information through irradiation with a laser beam or application of an electric current, and a dielectric layer,
- wherein the dielectric layer comprises M1 (provided that M1 is at least one element selected from Sc, Gd, Dy and Yb), M2 (provided that M2 is at least one element selected from Zr, Hf and Si) and O, such that the dielectric layer is not comprised of S and is not comprised of F.
An information recording medium comprising at least two information layers, wherein at least one information layer comprises at least a recording layer that records and/or reproduces information through irradiation with a laser beam or application of an electric current, and a dielectric layer,
- wherein the dielectric layer comprises M1 (provided that M1 is at least one element selected from Sc, Gd, Dy and Yb), M2 (provided that M2 is at least one element selected from Zr, Hf and Si) and O, such that the dielectric layer is not comprised of S and is not comprised of F.
A method for manufacturing an information recording medium, the method comprising at least forming a recording layer and forming a dielectric layer,
- wherein a sputtering target is used in forming the dielectric layer, the dielectric layer comprising at least O, M1 (provided that M1 is at least one element selected from Sc, Gd, Dy and Yb), and M2 (provided that M2 is at least one element selected from Zr, Hf and Si), such that the dielectric layer is not comprised of S and is not comprised F.
A method for manufacturing an information recording medium, the method comprising forming at least two information layers,
- wherein at least one information layer of the at least two formed information layers includes a recording layer and a dielectric layer, and
- wherein a sputtering target is used in forming the dielectric layer, the dielectric layer comprising at least O, M1 (provided that M1 is at least one element selected from Sc, Gd, Dy and Yb), and M2 (provided that M2 is at least one element selected from Zr, Hf and Si), such that the dielectric layer is not comprised of S and is not comprised F.
Dependencies are inferred from the claim text.