Optical recording medium and method of optical recording and erasing using medium
April 10, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3636526 Optical information storage material and method of making it Method and apparatus for recording information Recording material Optical information recording material and method of recording and reproducing information using same material Light information recording medium and light information recording and reading method Optical information recording member comprising Au, TeO2 and Te Recording medium Information recording member Patent #: 4637976 InventorsApplicationNo. 930017 filed on 11/07/1986US Classes:430/270.12, Having read-write layer of 100 per cent inorganic composition346/135.1, Laminated, impregnated, or coated bases347/264, With record receiver or handling means therefor430/19, ERASABLE IMAGING430/21, RETRIEVING IMAGE MADE USING RADIATION IMAGERY430/523, Identified backing or protective layer containing430/524, Metal430/531, Synthetic resin or cellulose derivative containing430/945LASER BEAMExaminersPrimary: Louie, Won H.Foreign Patent References
International ClassesG03C 001/72G03C 001/94 Foreign Application Priority Data1983-04-01 JPAbstractThe invention is directed to an optical recording member including a thin film photosensitive layer provided on a base. The thin film photosensitive layer may vary between a low optical density state and a high optical density state when optical energy is applied thereto. This thin film photosensitive layer contains a first element which may be a metal or semimetal, a second element which is at least one selected from Te, Ge, Sn, Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Mo, Rh, Pd, Ag, Cd, In, Ta, W, Pt, Au, Tl, Pb, Si, Sb, Bi, and an oxygen element. Part of the oxygen element is bonded with the first element to form its oxide. The ratio x of the total number of atoms of the oxygen element to that of the first element, when the maximum valence of the first element in a stable oxide state is n, is according to the relation of 0<x<n/2. At least part of the second element exists in a non-oxide state. This thin film photosensitive layer is formed by a vacuum deposition or sputtering method. By irradiating the optical recording medium with light, information may be recorded or recorded information may be erased.Other References
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