Supperresolution readout thin film and information recording med

Details Supperresolution readout thin film and information recording med Supperresolution readout thin film and information recording med

1994-06-16

1998-01-20

McPherson, John A.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

43027011, 430945, 428 645, 428 646, 369121, G11B 700, G11B 724

Patent

active

057099782

ABSTRACT:
A recording film 3 of phase change type of Sb--Te--Ge system or Sb--Te--In system has at least one of lanthanoid elements and elements selected from among Ag, Ba, Co, Cr, Ni, Pt, Si, Sr, Au, Cd, Cu, Li, Mo, Mn, Zn, Al, Fe, Pb, Na, Cs, Ga, Pd, Bi, Sn, Ti, and V added thereto. A high melting point component 3b is precipitated in the recording film 3 to coexist with a phase change component 3a, thereby preventing the recording film 3 from flowing and segregating during recording and erasing. The recording film 3 can be made not as recording film, but as superresolution readout thin film to mask an optical disc recorded by ruggedness, an optical disc of phase change type, and a magneto-optical disc, thereby increasing number of possible superresolution readouts to a great extent.

REFERENCES:
patent: 4653024 (1987-03-01), Young et al.
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patent: 5194363 (1993-03-01), Yoshioka et al.
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patent: 5294523 (1994-03-01), Nagata et al.
patent: 5304440 (1994-04-01), Ono et al.
Abstract of JP1-2773338, "Optical Recording Medium", Fujimori et al. (Nov./1989).
Takeo OHTA, et al. "Million Cycle Overwritable Phase Change Optical Disk Media", Optical Data Storage Topical Meeting (1989) , SPIE vol. 1078, pp. 27-34 (English translation).

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