摘要:
The present invention presents an optical information recording medium in which deformations brought about by changes to the environmental conditions are suppressed. The recording medium includes a transparent resin layer, a resin substrate that is thicker than the transparent resin layer, and an information recording layer disposed between the transparent resin layer and the resin substrate. A moisture absorption prevention film is formed on at least a portion of an outer principal surface of the resin substrate.
摘要:
An optical information recording medium, which is not deteriorated after repeating reading out and writing in, is provided by forming a glass thin film (2), on a substrate (1), and providing a recording film, a protective film, and a reflecting film thereon. The thin glass film (1) has non-linear intensity distributions of irradiated and transmitted light. The glass contains cobalt oxide.
摘要:
In a write once optical recording medium comprising a recording layer and a light transmitting protective layer formed successively on a supporting body, for recording and reproduction by irradiating a laser beam of a 380 to 450 nm wavelength from the light transmitting protective layer side, λ max ≤ 370 nm on the premise that the wavelength providing the peak optical absorption coefficient of the recording layer is defined to be λ max .
摘要:
An optical recording medium incorporating a supporting body; a recording portion which is formed on either main surface of the supporting body and on which a signal is recorded; and a light permeable layer formed on the recording portion, wherein light is applied from a position adjacent to the light permeable layer to record/reproduce a signal, and carboxylic acid amine salt expressed by general formula (1) and/or general formula (2) is held on the surface which is irradiated with light where n is an integer from 1 to 3, each of R1 and R2 is hydrogen or a hydrocarbon group, R3 is a hydrocarbon group and R f is a perfluoroalkyl group having three or more carbon atoms, where at least either of R 1 and R 2 is perfluoroalkyl group having three or more carbon atoms, at least any one of R 1 , R 2 , R 3 , R 4 and R 5 is hydrocarbon group having 12 or more carbon atoms and the rest of them are hydrogen or hydrocarbon group.
摘要:
An optical information recording medium, which is not deteriorated after repeating reading out and writing in, is provided by forming a glass thin film (2), on a substrate (1), and providing a recording film, a protective film, and a reflecting film thereon. The thin glass film (1) has non-linear intensity distributions of irradiated and transmitted light. The glass may contain cobalt oxide.
摘要:
The invention is to a method of manufacturing a recording medium, such as an optical information recording medium and a magnetic recording medium. By providing the surface of an optical information recording medium with a chemical adsorption film containing an alkyl fluoride through a siloxane coupling, a recording medium excelling in humidity resistance and corrosion resistance is obtained. By providing the surface of a magnetic recording medium with a chemical adsorption film containing an alkyl fluoride through siloxane coupling, a recording medium excelling in lubricity, durability, running performance and wear resistance may be obtained. Employing the vapor phase process, a plastic substrate may be used, and the formation of pin holes may be prevented.
摘要:
Verfahren zur Herstellung einer dünnen röntgenamorphen Aluminiumnitrid- oder Aluminiumsiliciumnitrid-Schicht auf einer Oberfläche durch reaktive Kathodenzerstäubung oder reaktive Magnetronkathodenzerstäubung von Aluminium oder von Aluminium und Silicium im Vakuum in einer Edelgas und Stickstoff enthaltenden Prozeßgasatmosphäre und durch Abscheiden der betreffenden Nitridschicht aus der Gasphase, bei welchem man (a) als Edelgas Xenon, Neon oder Krypton oder alternativ (b) ein Gemisch von Xenon mit Neon und/oder Krypton oder von Neon mit Krypton verwendet, wobei (c) das Volumenverhältnis des Edelgases (a) oder des Edelgasgemischs (b) zu Stickstoff bei 2:1 bis 10:1 liegt.
摘要:
A method of optical recording uses a film of a material which has a crystallisation temperature between 100 DEG C and 400 DEG C and can be switched between the amorphous and the crystalline states. Both the amorphous and crystalline states are substantially a single phase where the stoichiometric ratio of the material remains unchanged. A spot on the film is heated with a laser beam with a controlled pulse duration and intensity to melt the material in the spot. When the laser irradiation is stopped, the material in that spot is quenched at a rate that produces the desired state, that is, either to the crystalline or the amorphous state.
摘要:
In an optical recording medium (optical disk recording medium) on which information can be optically written, read and erased by use of a laser light and which comprises a transparent substrate of a synthetic resin and an information-recording layer provided on the surface of the substrate, said synthetic resin consists of an epoxy resin composition comprising an alicyclic epoxy resin or a mixture of an alicyclic epoxy resin and an aromatic epoxy resin; an organic polybasic acid anhydride; a curing accelerator; and an anti-discoloring (anti-oxidizing) agent, the above substrate is a cured product of a cast article of the epoxy resin composition and has a SiO2 or SiO layer or a hard coat layer of a synthetic resin which may have a SiO2 or SiO layer on its surface, whereby the substrate has thermal resistance and abrasion or scratch resistance, and on said layer there is provided an information-recording layer made of a low melting point metal such as Te, Se, Bi or the like or a complex material of said metal and an organic material or a rare earth metal and transition metal series magnetic alloy such as Td-Gd-Fe or the like. Said transparent substrate can easily be obtained by forming a thin film of MgF2, CaF2 or SiC on the inner surface of a casting mold by an ion-plating method, a spattering method or the like in order to facilitate the release of the molded article of the epoxy resin composition from the casting mold, and casting the epoxy resin composition into the mold. The Si2O or SiO layer or the hard coat of synthetic resin is applied on the thus obtained substrate and the information-recording layer is then applied thereto in a conventional manner. The hard coat of synthetic resin can easily be formed by first applying the hard coat layer on the inner surface of the casting mold, then casting the epoxy resin composition into the casting mold and curing the same to transfer the hard coat onto the cured molded article of the epoxy resin composition.