Abstract: An optical information recording medium includes a recording layer capable of recording information signals on the basis of application of light, wherein the recording layer contains an oxide of metal X and an oxide of metal Y, the metal X is at least one type selected from the group consisting of tungsten and molybdenum, and the metal Y is at least one type selected from the group consisting of copper, manganese, nickel, and silver.

Abstract: An optical information recording medium including a substrate; two or more recording layers provided on the substrate; and a protective layer provided on the recording layers, wherein the surface of one of the side of the substrate and the protective layer is a light irradiation plane, at least one of the recording layers other than the recording layer at the deepest position from the light irradiation plane includes W, Pd, and Cu oxides as the principal components, and the ratio of W, Pd, and Cu that are respectively included in the W, Pd, and Cu oxides satisfies the relationship 0.17?x1 (where x1=a/(b+0.8c), where a: atomic ratio of W with respect to the total of W, Pd, and Cu, b: atomic ratio of Pd with respect to the total of W, Pd, and Cu, and c: atomic ratio of Cu with respect to the total of W, Pd, and Cu).

Abstract: An optical recording medium includes an inorganic recording layer, a first protective layer provided on at least one surface of the inorganic recording layer and containing indium oxide, and a second protective layer provided so as to be adjacent to the first protective layer and containing titanium oxide, zirconium oxide, or tin oxide.

Abstract: An optical recording medium includes: an inorganic recording layer; and a protective layer including a composite oxide containing an indium oxide provided on at least one surface of the inorganic recording layer, wherein the composite oxide is represented by the formula [(In2O3)1-X(A)X], wherein A is cerium oxide or gallium oxide and X satisfies a range of 0.15?X?0.75.

Abstract: An electrolyte membrane (11) includes: a filler (20); and a polymer electrolyte (22). A thickness of the electrolyte membrane (11) is 1 micrometer to 500 micrometer, a moisture content thereof is 10 mass % or more, and a ratio of a swelling ratio in a membrane surface direction (xy) thereof and a swelling ratio in a membrane thickness direction (z) thereof satisfies following Expression 1: where Lambda z is the swelling ratio in the membrane thickness direction (z), and Lambda xy is the swelling ratio in the membrane surface direction (xy). ? ? ? xy ? ? ? z < 0.3 [ Math .

Abstract: An optical information recording medium includes: a substrate; two or more information signal layers provided on the substrate; and a cover layer provided on the information signal layers. At least one of the two or more information signal layers is provided with an inorganic recording layer including Pd oxide, a first protective layer provided on a first main surface of the inorganic recording layer, and a second protective layer provided on a second main surface of the inorganic recording layer. And at least one of the first protective layer and the second protective layer includes a compound oxide of Si oxide, In oxide and Zr oxide as a main component.

Abstract: An optical information recording medium including a substrate; two or more recording layers provided on the substrate; and a protective layer provided on the recording layers, wherein the surface of one of the side of the substrate and the protective layer is a light irradiation plane, at least one of the recording layers other than the recording layer at the deepest position from the light irradiation plane includes W, Pd, and Cu oxides as the principal components, and the ratio of W, Pd, and Cu that are respectively included in the W, Pd, and Cu oxides satisfies the relationship 0.17?x1 (where x1=a/(b+0.8c), where a: atomic ratio of W with respect to the total of W, Pd, and Cu, b: atomic ratio of Pd with respect to the total of W, Pd, and Cu, and c: atomic ratio of Cu with respect to the total of W, Pd, and Cu).

Abstract: An optical information recording medium including: a substrate; two or more information signal layers provided on the substrate; and a cover layer provided on the information signal layers, wherein the surface of one of the side of the substrate and the cover layer is a light irradiation plane, wherein at least one of the information signal layers other than the information signal layer at the deepest portion from the light irradiation plane includes an inorganic recording layer that includes a W oxide and a Pd oxide, a first protective layer that is provided on a first principal plane of the inorganic recording layer, and a second protective layer that is provided on a second principal plane of the inorganic recording layer, wherein at least one of the first protective layer and the second protective layer is a layer with an extinction coefficient of 0.05 to 0.6.

Abstract: A polyurea electrolyte includes a polyurea resin formed by a polymerization of a first compound having two or more isocyanate groups and a second compound having two or more amino groups. The first compound or the second compound contains ten or more carbon chains, and the first compound or the second compound contains a sulfonic acid group or a carboxylic acid group. A method for manufacturing the polyurea electrolyte includes neutralizing the sulfonic acid group or the carboxylic acid group in the first compound or the second compound by a neutralizing agent; after the neutralizing, polymerizing the first compound and the second compound; and after the polymerizing, removing the neutralizing agent from a polymer of the first compound and the second compound.

Abstract: An optical recording medium includes an inorganic recording layer, a first protective layer provided on at least one surface of the inorganic recording layer and containing indium oxide, and a second protective layer provided so as to be adjacent to the first protective layer and containing titanium oxide, zirconium oxide, or tin oxide.

Abstract: Data is recorded in a phase-change optical storage medium having data layers. A first recording pulse sequence is generated for recording to a first data layer located most remote from a beam-incident surface. The first sequence has a recording pulse carrying an erasing power and a recording power rising from the erasing power, and a cooling pulse carrying a bottom power lower than the erasing power. A second recording pulse sequence is generated for recording to a second data layer. The second sequence has recording pulse carrying an erasing power and a recording power rising from the erasing power, a cooling puse carrying a bottom power lower than the erasing power, and an erasing top pulse carrying an erasing top power higher than the erasing power.

Abstract: An optical recording medium includes: an inorganic recording layer; and a protective layer including a composite oxide containing an indium oxide provided on at least one surface of the inorganic recording layer, wherein the composite oxide is represented by the formula [(In2O3)1-X(A)X], wherein A is cerium oxide or gallium oxide and X satisfies a range of 0.15?X?0.75.

Abstract: An optical storage medium has a substrate and a cover layer that allows light to pass therethrough in recording or reproduction. Provided between the substrate and the cover layer are at least a reflective film, a first dielectric film, a recording film, and a second dielectric film formed in this order from the substrate side. Provided further between the second dielectric film and the cover layer is a damp-proof film that is at least partially an amorphous film and contains at least an indium oxide.

Abstract: An electrolyte membrane (11) includes: a filler (20); and a polymer electrolyte (22). A thickness of the electrolyte membrane (11) is 1 micrometer to 500 micrometer, a moisture content thereof is 10 mass % or more, and a ratio of a swelling ratio in a membrane surface direction (xy) thereof and a swelling ratio in a membrane thickness direction (z) thereof satisfies following Expression 1: where Lambda z is the swelling ratio in the membrane thickness direction (z), and Lambda xy is the swelling ratio in the membrane surface direction (xy). ? ? ? xy ? ? ? z < 0.3 [ Math .

Abstract: Test signals are recorded on a prescribed area in an optical disc. The prescribed area is scanned by a laser beam while the power of the laser beam is changed among different DC erasing values. The different DC erasing values are assigned to the recorded test signals, respectively. The recorded test signals are reproduced from the prescribed area to obtain reproduced signals. Parameter values of the respective reproduced signals are detected. The detected parameter values correspond to the different DC erasing values, respectively. Among the detected parameter values, a detected parameter value is decided which matches a target. One corresponding to the decided parameter value is selected from the different DC erasing values. A prescribed coefficient and the selected DC erasing value are multiplied to calculate an optimum level of an erasing power of the laser beam.

Abstract: A phase-change optical storage medium has a substrate and a recording layer having a plurality of tracks for storing information. A material of which the recording layer is made has been initialized in a crystalline state in which an amplitude of a tracking-detection signal is smaller than a saturation value of the amplitude, the tracking-detection signal being obtained by receiving a reflected beam from the recording layer when the recording layer is irradiated with a laser beam in an off-track state while the optical storage medium is being rotated.

Abstract: A phase-change optical storage medium has a substrate, and a recording layer, to be recorded on which is at least one recorded mark representing information to be recorded by irradiating a recording light beam onto the recording layer in accordance with a recording pulse pattern of recording pulses rising from an erasing power and formed between a recording power larger than the erasing power and a bottom power smaller than the erasing power and of erasing pulses rising from the bottom power to the erasing power. The expressions (1) and (2): 1.00<(R1/R0)<1.15 . . . (1), 1.05<(R9/R0)<1.20 . . .

Abstract: An optical storage medium has a substrate and a cover layer that allows light to pass therethrough in recording or reproduction. Provided between the substrate and the cover layer are at least a reflective film, a first dielectric film, a recording film, and a second dielectric film formed in this order from the substrate side. Provided further between the second dielectric film and the cover layer is a damp-proof film that is at least partially an amorphous film and contains at least an indium oxide.

Abstract: Information to be recorded is recorded in a recording layer of a phase-change optical storage medium. The information to be recorded is modulated to generate modulated data. Desired mark-length data is generated based on the modulated data. Generated further based on the mark-length data is a recording pulse pattern of recording pulses rising from an erasing power and formed between a recording power larger than the erasing power and a bottom power smaller than the erasing power and of erasing pulses rising from the bottom power to the erasing power. A recording light beam is then irradiated onto the recording layer in accordance with the recording pulse pattern to record at least one recorded mark representing the information to be recorded. Used in recording is an optimum erasing power, as the erasing power, the optimum erasing power satisfying an expression (1): 1.000<(R1/R0)<1.030 . . .

Abstract: An optical storage medium has a substrate having a first surface and an opposite second surface, light being incident via the first surface in recording or reproduction and at least two composite layers formed on the second surface of the substrate, each composite layer having at least a recording film.