Method of initializing phase-change optical disk and phase-change optical disk
AssigneeSony Corporation
InventorsYUTAKA KASAMI, KAZUMINE ITO
Life of this patent
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Abstract
A method of initializing a phase-change optical disk which is capable of preventing enlargement of an amount of jitter which takes place when the number of overwriting operations does not exceed several times. The surface of the phase-change optical disk, on which information signals will be recorded, is crystallized. Then, signals are recorded with marks and spaces in grooves along tracks of the phase-change optical disk so that initialization is performed. The initialization is performed in such a manner that the length of each of spaces is shorter than a shortest length of spaces of information signals.
Claims5
A method of initializing a phase-change optical disk comprising:
- a crystallizing step for crystallizing recording regions formed on the main surface of a disk;
- and
- a recording step for recording at least marks along tracks by irradiating the recording regions with laser beams, wherein
- the length of each of spaces formed between the marks along the tracks is shorter than a shortest length of spaces each of which is formed between information signals which will be recorded on the recording regions.
A phase-change optical disk comprising:
- a disk having a main surface on which recording regions are formed;
- and
- at least marks formed in the recording regions along tracks, wherein
- the length of each of spaces formed between the marks along the tracks is shorter than a shortest length of spaces each of which is formed between information signals which will be recorded on the recording regions.
Dependencies are inferred from the claim text.