Phase-change optical disc

Details Phase-change optical disc Phase-change optical disc

1998-08-14

2000-12-12

Evans, Elizabeth

Stock material or miscellaneous articles

Circular sheet or circular blank

428 644, 428 645, 428457, 428913, 43027013, 4304951, 430945, 369283, 369288, B32B 302

Patent

active

061595713

ABSTRACT:
A phase-change optical disc that is adapted to weaken a self-sharpening effect and to be driven by a pulse width modulation system. In the disc, a dielectric layer formed on the surface of a recording layer and a heat flow control layer is sequentially disposed. The heat flow control layer is formed to include a material having a high heat conductivity and a material having a low heat conductivity.

REFERENCES:
patent: 5395669 (1995-03-01), Kawahara et al.
patent: 5681632 (1997-10-01), Kitaura et al.
patent: 5753334 (1998-05-01), Yoshioka et al.
patent: 5817389 (1998-10-01), Ono
patent: 5900347 (1999-05-01), Ohkubo

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