Wire vibration prevention mechanism for a single crystal pulling

Details Wire vibration prevention mechanism for a single crystal pulling Wire vibration prevention mechanism for a single crystal pulling

1990-04-17

1992-02-18

Chaudhuri, Olik

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including specific material of construction

422248, 1566171, 156DIG98, B01J 1710

Patent

active

050892398

ABSTRACT:
A single crystal pulling apparatus having a wire which is used to pull a crystal is provided with a novel wire vibration prevention mechanism. The wire vibration prevention mechanism includes wire restriction devices which restrict the movement of the wire to movement in the vertical direction. The wire restriction devices may be mechanically driven in the horizontal direction in order to center the pulled crystal. The wire restriction devices are driven by pneumatic air cylinders. Use of the wire vibration prevention mechanism avoids the formation of deformed growth of the pulled crystal and thus reduces the occurrence of dislocations in the pulled crystal.

REFERENCES:
patent: 4045278 (1977-08-01), Keller
patent: 4176002 (1977-11-01), Quenisset et al.
patent: 4190630 (1980-02-01), Apilat et al.

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