Single-crystal – oriented-crystal – and epitaxy growth processes; – Processes of growth from liquid or supercritical state – Having pulling during growth
Patent
1992-06-01
1997-11-25
Garrett, Felisa
Single-crystal, oriented-crystal, and epitaxy growth processes;
Processes of growth from liquid or supercritical state
Having pulling during growth
117 13, 117 15, 117201, C30B 1520
Patent
active
056907320
ABSTRACT:
A method of automatically growing a single crystal by using a floating-zone method in which radio-frequency induction heating is utilized, wherein the shape of molten zone of a sintered rod material is judged by comparing an anode voltage in a radio-frequency oscillation tube with a radio-frequency current, or a change in the shape of molten zone is judged depending of a change in a radio-frequency current during the growth of the sintered rod material, and power for heating is controlled on the basis of the judgement.
REFERENCES:
patent: 4220839 (1980-09-01), De Leon
patent: 4292487 (1981-09-01), De Leon
patent: 4619811 (1986-10-01), Nishizawa
Ishizawa Yoshio
Otani Shigeki
Tanaka Takaho
Garrett Felisa
National Institute for Research in Inorganic Materials
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