摘要:
A novel monoamino compound is provided. Using the monoamino compound, an organic luminescence device is provided, which exhibits a luminescence hue with extremely high purity, and having an optical output of a high luminance with a high efficiency and a long life time. The monoamino compound is represented by the following general formula [1].
摘要:
A process for producing an information recording medium comprising a substrate and provided thereon a recording layer and protective layer comprises the steps of forming on one substrate sheet a plurality of grooved preformats used for information recording mediums, forming a recording layer on the substrate sheet having thereon said plurality of grooved preformats, forming a protective layer on the substrate sheet on which said recording layer has been formed, and cutting the resulting substrate sheet into individual information recording mediums.
摘要:
There is provided a cast molding die for an information recording medium, having a mold surface with a prescribed unevenness pattern including a projection; wherein the projection has at least one pair of opposite side slopes each of which forms an acute angle with respect to the extension of the mold surface. By using the cast molding die having the above-mentioned projection with a three-dimensional shape, a defect such as lack in the resultant information recording medium is prevented.
摘要:
A molding die for an information recording medium substrate having a prescribed unevenness pattern comprising a track portion and an information pit portion which has a planar shape of a polygon wherein at least one diagonal is substantially parallel to the track portion. Such molding die provides an information recording medium substrate without lack in the periphery of a pre-format.
摘要:
An optical recording medium wherein recording information has been recorded as pits, comprises an absorptive layer and a reflective layer placed thereon, the absorptive layer having, on the surface, concave portions thermally deformed by heat generated upon irradiation of light beams, and the reflective layer having concave pits formed by deformation as a consequence of the thermal deformation of the absorptive layer and covering said concave portions of the absorptive layer in such a state that the concave portions are not exposed.An optical recording method comprises irradiating an optical recording medium having an absorptive layer and a reflective layer placed thereon, with light beams to generate a heat, allowing the heat to cause the thermal deformation of the absortive layer to form concave portions on the surface of the absorptive layer, deforming the reflective layer as a consequence of the thermal deformation of the absorptive layer, thereby allowing the deformed reflective layer to cover the concave portions of the absorptive layer in such a state that the concave portions are not exposed and to form concave pits.
摘要:
A process for patterning a substrate by forming electrodeposited layers on the substrate so as to correspond with two or more kinds of patterns has the steps of preparing an electrodeposition original plate having conductive patterns respectively corresponding with patterns in which respective conductive patterns are laid bare and conductive patterns are insulated from each other in such a manner that the electrodeposited layers can be respectively independently formed on the conductive patterns successively, forming the electrodeposited layers on the respective conductive patterns and transferring the electrodeposited layers formed on the respective conductive patterns, to a substrate.
摘要:
A mold for molding a plurality of substrates for an information recording medium includes a fixing member, a plurality of units fixed to the fixing member, and a molding cavity. Each of the units has a preformat pattern with a surface corresponding to information recording medium formed on its surface, and the molding cavity is disposed opposite to the units so that the preformat patterns face the molding cavity.
摘要:
An optical recording medium for writing and reading information by use of a beam of light comprises an optical recording layer comprising a light-reflective layer and a light-absorptive layer having been preformatted in the form of grooves.
摘要:
There is provided a molding die for an information recording medium substrate having a prescribed unevenness pattern comprising a track portion and an information pit portion which has a planar shape of a polygon wherein at least one diagonal is substantially parallel to the track portion. Such molding die provides an information recording medium substrate without lack in the periphery of a pre-format.
摘要:
An information recording medium comprising a stack of layers includes a recording layer interposed between two shielding layers, the shielding layers being opaque to radiation within a predetermined wavelength band. The recording layer is adjacent to a layer which is transparent to radiation within the predetermined wavelength band, and is readable by radiation within the predetermined wavelength band passing into the layer through a free edge of the layer.