Optical recording medium
AssigneeTDK Corporation
InventorsHiroshi Shingai, Hideaki Miura, Jiro Yoshinari
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Abstract
An optical recording medium is provided which enables overwriting at high speeds or the value of (λ/NA)/V being 70 or less (where λ is the wavelength of the laser beam, NA is the numerical aperture of the objective lens, and V is the overwrite linear speed), and which also enables overwriting at high speeds even in a next-generation optical recording system typified by a blu-ray disc. The recording layer of the optical recording medium is predominantly composed of at least Sb and Mg.
Claims6
An optical recording medium having a phase-change recording layer which utilizes a reversible phase change between an amorphous phase and a crystalline phase wherein
- the recording layer is predominantly composed of at least Sb and Mg.
Dependencies are inferred from the claim text.