Single-crystal – oriented-crystal – and epitaxy growth processes; – Apparatus – For crystallization from liquid or supercritical state
Patent
1998-03-13
1999-08-10
Hiteshew, Felisa
Single-crystal, oriented-crystal, and epitaxy growth processes;
Apparatus
For crystallization from liquid or supercritical state
117208, 117911, C30B 3500
Patent
active
059353295
ABSTRACT:
In a lifting unit for a device for pulling monocrystals, a frame that extends in the horizontal direction and surrounds a pulling shaft and/or a crystal is provided with at least two bearings as well as two-armed grippers that are held in the aforementioned bearings and can be pivoted in vertical planes. The respective gripping arms are aligned with the rotational axis of the frame and have such a length that the end surfaces of the gripping arms which face one another tightly adjoin one another in the closed position and only allow a limited pivoting movement. The respective free ends of the two-armed grippers are coupled to tie rods that approximately extend in the vertical direction. The upper ends of the tie rods are connected in articulated fashion via a horizontally extending crossbeam, where the crossbeam with a spindle nut can be adjusted along the pulling shaft via a threaded spindle. The frame is suspended on cables that serve for pivoting the gripping arms.
REFERENCES:
patent: 4190630 (1980-02-01), Apilat et al.
patent: 5196086 (1993-03-01), Kidajetah
Hiteshew Felisa
Leybold Systems GmbH
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