Method and device for crucible-free floating zone melting

Details Method and device for crucible-free floating zone melting Method and device for crucible-free floating zone melting

1976-07-12

1978-08-15

Envall, Jr., R. N.

13DIG1, B01J 1708

Patent

active

041074483

ABSTRACT:
By coupling the molten zone of a semiconductor rod, which is subjected to a crucible-free zone melting operation, to the operating coil used for inductively heating the molten zone, the frequency of the generator energizing the coil is determined. At constant geometry, this frequency is a measure of the molten zone volume and can be used for control purposes. A high-frequency cable disposed between the generator and the operating coil is fully matched, so that substantially only effective power has to be transmitted.

REFERENCES:
patent: 3270177 (1966-08-01), Prediger et al.

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