초록 ▼

An erasable phase change recording medium includes a transparent substrate, a recording layer of a phase change material provided on the substrate, and a protection layer provided to protect the recording layer on the substrate. Tracks are formed with alternate grooves and lands on the substrate of

An erasable phase change recording medium includes a transparent substrate, a recording layer of a phase change material provided on the substrate, and a protection layer provided to protect the recording layer on the substrate. Tracks are formed with alternate grooves and lands on the substrate of the recording medium and data is recorded to at least one of the grooves and the lands. The recording medium is configured to have a track pitch between 0.6 .mu.m and 0.8 .mu.m and a groove depth between 0.11.L and 0.18.L where L is a wavelength of a laser beam.

대표청구항 ▼

[ What is claimed is:] [1.] An erasable phase change recording medium for allowing an optical disk player to reproduce data from the recording medium through a tracking servo control based on a differential phase detection method, comprising:a transparent substrate;a recording layer of a phase chang

[ What is claimed is:] [1.] An erasable phase change recording medium for allowing an optical disk player to reproduce data from the recording medium through a tracking servo control based on a differential phase detection method, comprising:a transparent substrate;a recording layer of a phase change material provided on the substrate; anda protection layer provided to protect the recording layer on the substrate,wherein tracks are formed with alternate grooves and lands on the substrate of the recording medium and data is recorded to at least one of the grooves and the lands, the recording medium being configured to have a track pitch between 0.6 .mu.m and 0.8 .mu.m and a groove depth between 0.11.L and 0.18.L where L is a wavelength of a laser beam, said wavelength being 640 nm.