Coating processes – Optical element produced
Patent
1998-07-14
1999-11-02
Bell, Janyce
Coating processes
Optical element produced
427554, B05D 506
Patent
active
059766174
ABSTRACT:
A method of initializing a phase transformation-type optical disk. The initialization method includes the steps of: (a) preparing a phase transformation-type optical disk in which a first dielectric layer, a recording layer including a small amount of crystalline structure in a major amorphous structure, a second dielectric layer and a reflective layer are sequentially deposited on a substrate; (b) irradiating a high power laser beam, which is enough to heat the recording layer to a temperature above its melting point, onto the optical disk, thereby transforming the crystalline structure in the recording layer into an amorphous structure; and (c) irradiating a lower power laser beam, which is capable of heating the recording layer to a temperature range above a recrystallization temperature and below its melting point, onto the optical disk, thereby transforming the amorphous structure of the recording layer into the crystalline structure.
REFERENCES:
patent: 5608710 (1997-03-01), Minemura et al.
Effect of Initializaton Conditions on the Dynamic Characteristics and HREM Lattice Images of Phase Change Optical Disks (no date).
Cho Byung-Il
Hong Hyeon-chang
Jung Seung-tae
Bell Janyce
Samsung Electronics Co,. Ltd.
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