Single crystal pulling apparatus

Details Single crystal pulling apparatus Single crystal pulling apparatus

1990-05-30

1992-03-17

Kunemund, Robert

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including specific material of construction

422107, 156601, 1566171, 1566181, 1566204, C30B 3500, C30B 1520

Patent

active

050966774

ABSTRACT:
A Czochralski-type single crystal pulling apparatus in which the heater device is adapted to shift vertically, and a control device is provided for controlling the vertical shifting of the heater and the crucible assembly in predetermined manners, of which a preferred manner is to control the vertical shifting of the heater and the crucible assembly such that the vertical velocities of the crucible assembly and the heater are in direct proportion to the vertical velocity of the pull means.

REFERENCES:
patent: 3621213 (1971-11-01), Jen et al.
patent: 3761692 (1973-09-01), Cope
patent: 3998598 (1976-12-01), Bonora
patent: 4915775 (1990-04-01), Katsuoka et al.

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