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US 7,214,416 B2Granted
Phase-change optical recording medium
AssigneeKabushiki Kaisha Toshiba
InventorsTsukasa Nakai, Sumio Ashida, Keiichiro Yusu, Takayuki Tsukamoto, Noritake Oomachi, Naomasa Nakamura, Katsutaro Ichihara, Deceased, Urara Ichihara, Legal Representative
Life of this patent
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Abstract
A phase-change optical recording medium has a recording film that brings about reversible phase-change between a crystalline phase and an amorphous phase upon irradiation with light and an interface film formed in contact with at least one surface of the recording film and comprising hafnium (Hf), silicon (Si), oxygen (O) and carbon (C).
Claims7
A phase-change optical recording medium, comprising:
- a recording film that brings about reversible phase-change between a crystalline phase and an amorphous phase upon irradiation with light;
- and
- an interface film formed in contact with at least one surface of the recording film and comprising hafnium (Hf), silicon (Si), oxygen (O) and carbon (C).
Dependencies are inferred from the claim text.