Method for recording and erasing information

Details Method for recording and erasing information Method for recording and erasing information

1991-11-04

1993-06-22

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Erasable imaging

430495, 430945, 3461351, G03C 172, G11B 724

Patent

active

052215881

ABSTRACT:
A method for recording and erasing information by irradiating a specific recording medium with a single laser beam, which is applied with two different intensities respectively for crystallizing a recording layer of the recording medium and for amorphizing a recording layer of the recording medium. According to the present invention, both the recording of information and the erasing of information can be simply performed using a single laser beam by changing only its intensity between the two different laser beam intensities according to a laser beam intensity pattern corresponding to predetermined information.
The recording material comprises Sb, Te, Ge and at least one element selected from the group consisting of Pb, Bi, In, Sn and Tl.

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M. Chen et al, "Compound materials for reversible, phase-change optical data storage", Appl. Phys. Lett. 49 (9), 1986.
T. Nishida et al, "Single-beam overwrite experiment using In-Se based phase-change optical media", Appl. Phys. Lett. 50 (11), 1987.
A. Bell et al, "Antireflection Structures for Optical Recording", IEEE Journal of Quantum Electronics, vol. QE-14, No. 7, p. 487 (1978).

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