Photo-induced temperature gradient zone melting

Details Photo-induced temperature gradient zone melting Photo-induced temperature gradient zone melting

1979-07-31

1981-03-24

Ozaki, G.

Metal treatment

Compositions

Heat treating

148171, 148188, H01L 21275

Patent

active

042578248

ABSTRACT:
A temperature gradient zone melting process is disclosed wherein the temperature gradient is established substantially across only the molten zone by preferentially heating the molten zone. In a specific embodiment, the mechanism for inputting heat to the molten zone involves exposing the substrate to optical radiation of a wavelength and magnitude for which the molten zone is absorptive and the remainder of the body is transparent. The molten zone thereby migrates through the body toward the source of optical radiation.

REFERENCES:
patent: 2739088 (1956-03-01), Pfann
patent: 2813048 (1957-11-01), Pfann
patent: 3420719 (1969-01-01), Potts
patent: 3898106 (1975-08-01), Cline
patent: 3940289 (1976-02-01), Marquardt et al.
patent: 4059461 (1977-11-01), Fan et al.
patent: 4131487 (1978-12-01), Pearce et al.
patent: 4137100 (1979-01-01), Zaleckas
patent: 4147563 (1979-04-01), Narayan et al.
patent: 4151008 (1979-04-01), Kirkpatrick
patent: 4154625 (1979-05-01), Golovchenko et al.

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