Information recording medium and information memory storage

Details Information recording medium and information memory storage Information recording medium and information memory storage

1997-07-29

1999-03-16

Evans, Elizabeth

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428 644, 428 645, 428 646, 428 647, 428457, 428913, 43027013, 4304951, 430945, 3692754, 369283, 369288, B32B 300

Patent

active

058827595

ABSTRACT:
An information recording medium which comprises as a recording layer an information recording thin layer, formed on a substrate directly or via an underlayer, which records and/or reads back information through the use of atomic arrangement change caused by the irradiation of energy beams, a protective layer and at least two reflective layers, the reflective layers including a first reflective layer and a second reflective layer, the materials of which differ in refractive index or extinction coefficient or both, the aforesaid layers being laminated in the order, from the side of light incidence, of the protective layer, the recording layer, an intermediate layer, the first reflective layer and the second reflective layer.

REFERENCES:
patent: 5479382 (1995-12-01), Nishida et al.
patent: 5650992 (1997-07-01), Ohkubo
patent: 5703867 (1997-12-01), Miyauchi et al.
patent: 5709978 (1998-01-01), Hirotsune et al.
SPIE vol. 1078 Optical Data Storage Topical MEeting (1989), "Million Cycle Overwritable Phase Change Optical Disk Media", T. Ohta et al, pp. 27-34.
41st Applied Physics Joint Lecture Meeting, A. Hirotsune et al, p. 1000.
NEC Device Res. Labs., NEC Corporation, "Relation between mark edge recording characteristics and thermal properties of phase change media", S. Ohkubo et al, pp. 98-99.
Japan Journal of Applied Physics, vol. 32, 1993, "Premastered Optical Disk by Superresolution", K. Yasuda et al, pp. 5210-5213.

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