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AssigneePioneer Corporation
InventorsYasuo Hosoda, Ayumi Mitsumori, Megumi Sato, Masataka Yamaguchi, Tomoaki Izumi, Satoshi Jinno, Yoichi Okumura
Estimating the term…
An information recording medium has an excellent jitter characteristic with a considerable difference in reflectance between prior to and subsequent to recording. The information recording medium includes a recording layer which contains a material having a reflectance which varies by irradiation of a light beam, on which information is recorded as reflectance variations, and a substrate for supporting the recording layer, the recording layer including a metal nitride as a major component. In a method of manufacturing the information recording medium having a recording layer which includes a material having a reflectance which varies by irradiation of a light beam, on which information is recorded as reflectance variations, and the substrate for supporting the recording layer, the recording layer including a metal nitride as a major component, the method includes a recording layer forming step for forming the recording layer by a reactive sputtering method which uses a target comprised of a metal constituting a metal nitride, wherein a flow ratio Ar:N2 in an atmosphere including Ar and N2 in the recording layer forming step is set within the range of 80:10 to 10:80.
An information recording medium comprising a recording layer which includes a material having a reflectance which varies by irradiation of a light beam, on which information is recorded as reflectance variations, and a substrate for supporting the recording layer, characterized in that said recording layer comprises a mixture of both a low temperature decomposable nitride capable of being decomposed at a temperature ranging from 100° C. to 600° C. and a high temperature decomposable compound of a substance selected from a group consisting of a metal nitride, a metal oxide and a metal carbide or a mixture of at least two thereof which is capable of being decomposed at a temperature higher than said temperature.
3-5. (canceled)
A method of manufacturing an information recording medium having a recording layer which includes a material having a reflectance varying by irradiation of a light beam, on which information is recorded as reflectance variations, and a substrate for supporting said recording layer, characterized in that said recording layer comprises a mixture of both a low temperature decomposable nitride capable of being decomposed at a temperature ranging from 100° C. to 600° C. and a high temperature decomposable compound of a substance selected from a group consisting of a metal nitride a metal oxide and a metal carbide or a mixture of at least two thereof which is capable of being decomposed at a temperature higher than said temperature;
A target used for sputtering in a method of manufacturing an information recording medium having a recording layer, characterized in that said recording layer comprises a mixture of both a low temperature decomposable nitride capable of being decomposed at a temperature ranging from 100° C. to 600° C. and a high temperature decomposable compound of a substance selected from a group consisting of a metal nitride a metal oxide and a metal carbide or a mixture of at least two thereof which is capable of being decomposed at a temperature higher than said temperature;
Dependencies are inferred from the claim text.