摘要:
A phase change recording medium comprising an as-deposited first recording layer configured to undergo a reversible phase change between an amorphous state and a crystalline state due to light irradiation and thereby change an optical characteristic. The as-deposited first recording layer includes a plurality of fine nuclei having an average size of 0.5 nm to 4 nm in the amorphous state.
摘要:
There is provided an optical recording medium capable of preventing cross erase and increasing its recording density. The optical recording medium includes: a reflecting film; a first transparent film provided on the reflecting film; a first semitransparent film provided on the first transparent film; a second transparent film provided on the first semitransparent film; a recording film provided on the second transparent film, the recording film being capable of reversibly changing an atomic arrangement; and a third transparent film provided on the recording film. The first semitransparent film has a complex refractive index of n−k satisfying relationships of 0
摘要:
The present invention relates to an optical recording media including two or more information layers, at least one of the information layers including a writable recording film. In the optical recording media, at least one information layer has protrusions and recesses that permit tracking and at least another one information layer is substantially flat.
摘要:
The present invention relates to an optical recording media including two or more information layers, at least one of the information layers including a writable recording film. In the optical recording media, at least one information layer has protrusions and recesses that permit tracking and at least another one information layer is substantially flat.
摘要:
A phase change recording medium comprises a substrate, an interference layer formed on the substrate and a recording layer formed on the interference layer. In this, the reflectance of the crystalline region in the recording layer is lower than that of amorphous region therein, and the interference layer comprises at least three layers of which the dielectric constant differs from that of the adjacent layers. With that constitution, the optical characteristics and the thermal characteristics of the medium are all optimized.
摘要:
An optical recording media includes a recording film, and a stacked film of at least two dielectric films A and B formed on at least one surface of the recording film. Each of the dielectric films A and B contains as a main component a compound selected from the group consisting of an inorganic oxide, an inorganic nitride, an inorganic sulfide and an inorganic fluoride or a mixture thereof, and the refractive indexes nA and nB of the dielectric films A and B satisfy the following relationship: (nA−nB)/(nA+nB)≦0.05.
摘要:
An optical recording media has a disc substrate and two or more recording layers arranged apart from each other with a dielectric layer interposed therebetween to cause optical change simultaneously by irradiation with light, in which a first recording layer positioned near the disc substrate has a higher optical change temperature and a higher extinction coefficient compared with those of a second recording layer and a later recording layer.
摘要:
An optical recording media has a disc substrate and two or more recording layers arranged apart from each other with a dielectric layer interposed therebetween to cause optical change simultaneously by irradiation with light, in which a first recording layer positioned near the disc substrate has a higher optical change temperature and a higher extinction coefficient compared with those of a second recording layer and a later recording layer.
摘要:
According to one embodiment, an information storage medium includes a light incident surface from which a recording/playback light beam enters, a reflecting layer which reflects the light beam entering from the light incident surface, a recording layer which is arranged between the light incident surface and the reflecting layer, and a playback signal emphasizing layer which is arranged between the recording layer and the reflecting layer, and used to emphasize a playback signal containing a reflectance change component generated by a recording mark formed on the recording layer.
摘要:
According to one embodiment, an information recording and reproducing device includes a stacked body. The stacked body includes a first layer, a second layer and a recording layer provided between the first layer and the second layer. The recording layer includes a phase-change material and a crystal nucleus. The phase-change material is capable of reversely changing between a crystal state and an amorphous state by a current supplied via the first layer and the second layer. The crystal nucleus is provided in contact with the phase-change material and includes a crystal nucleus material having a crystal structure identical to a crystal structure of the crystal state of the phase-change material, and a crystal nucleus coating provided on a surface of the crystal nucleus material and having a composition different from a composition of the crystal nucleus material.