Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Kabushiki Kaisha

Kazuhiro Nishimura

Masaru Suzuki

Isao Morimoto

Shuichiro Ogawa

Masato Terada

A phase change optical disk having a reflectance relation of Rc<Ra and is adapted such that high recording characteristic can be obtained starting at a first recording time even when a recording operation is carried out without conducting an initialization process. For this purpose, a multiple reflection layer ( ), a first dielectric layer ( ), a recording layer ( ), a second dielectric layer ( ), a reflecting layer ( ) and an UV curable resin layer ( ) are provided on a substrate ( ). The recording layer ( ) is deposited at a temperature of the substrate during the deposition of the recording layer set to a temperature which makes the recording layer into a stable amorphous conditions and which is lower than a crystallizing temperature of the recording layer. Thus, the recording layer ( ) is deposited into a stable amorphous state.

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Fuji, Japan

Kazuhiro Nishimura