Phase-change optical recording medium having tracking signal...

Details Phase-change optical recording medium having tracking signal... Phase-change optical recording medium having tracking signal...

2005-01-27

2010-02-23

Dinh, Tan X (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

Reexamination Certificate

active

07668071

ABSTRACT:
A phase-change optical storage medium has a substrate and a recording layer having a plurality of tracks for storing information. A material of which the recording layer is made has been initialized in a crystalline state in which an amplitude of a tracking-detection signal is smaller than a saturation value of the amplitude, the tracking-detection signal being obtained by receiving a reflected beam from the recording layer when the recording layer is irradiated with a laser beam in an off-track state while the optical storage medium is being rotated.

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Japanese Office Action ((w/English Translation) (Nov. 21, 2008—4 pages).

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