Optical recording medium

Details Optical recording medium Optical recording medium

1982-06-14

1984-10-16

Pellinen, A. D.

Recorders

Thermal recording

3461351, 430945, G01D 1534

Patent

active

044778198

ABSTRACT:
An optical recording medium comprising adjacent thin layers of two different materials, which, upon marking with an energy beam, form a marked area comprising an alloy or mixture of the two materials. The optical properties of the marked area has contrast sufficiently different from the optical properties of the unmarked area so that the marked area can be reliably sensed. One of the first of the thin layers comprises a metal and the other of the thin layers comprises a metal or a semiconductor. The metals are taken from the group comprising Al, Au, Pb and Sn and the semiconductors are chosen from the group comprising Ge and Si.

REFERENCES:
patent: 3740761 (1973-06-01), Teehter
patent: 3959799 (1976-05-01), Gambino et al.
patent: 4000492 (1976-12-01), Willens
patent: 4214249 (1980-07-01), Kasai et al.
patent: 4237468 (1980-12-01), Nahara et al.
patent: 4241356 (1980-12-01), Brill et al.
patent: 4345261 (1982-08-01), Wilkinson
Streetman, Solid State Electronic Devices Pub. 1980, p. 2.

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