Pioneer Corporation

Tomoaki Izumi

Yasuo Hosoda

Satoshi Jinno

Masataka Yamaguchi

Ayumi Mitsumori

Yoichi Okumura

Megumi Sato

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:Nin an atmosphere including Ar and Nin the recording layer forming step is set within the range of 80:10 to 10:80.

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Tsurugashima, Japan

Tomoaki Izumi