Crystal pulling apparatus and method for the production of...

Details Crystal pulling apparatus and method for the production of... Crystal pulling apparatus and method for the production of...

2007-07-25

2010-11-09

Kunemund, Robert M (Department: 1714)

Single-crystal, oriented-crystal, and epitaxy growth processes;

Apparatus

For crystallization from liquid or supercritical state

C117S200000, C117S217000, C117S218000, C117S911000

Reexamination Certificate

active

07828897

ABSTRACT:
A pulling apparatus and a method with which especially heavy crystals (5) can be pulled using the Czochralski method utilizing the pulling apparatus. For this purpose the neck (4) of the crystal (5) has an enlargement (10) beneath which extends the support device. This device includes latches (7), which are moved from a resting position into an operating position in which the latches (7) extend beneath the enlargement (10). Each latch (7) is supported on the base body such that it is swivellable about a pivot axis (8) and can assume two stable positions, namely the resting position and the operating position. Each of these positions is defined by a stop on the base body. When the latch rests on the one stop, its center of gravity, viewed from the neck (4), is located on the other side of the pivot axis (8). When the latch rests on the other stop, the center of gravity is located on this side of the pivot axis (8). The actuation of the latches (7) takes place with actuation means disposed stationarily in the apparatus.

REFERENCES:
patent: 5935329 (1999-08-01), Schulmann
patent: 5938843 (1999-08-01), Hiraishi et al.
patent: 6139633 (2000-10-01), Nishiura
patent: 6299684 (2001-10-01), Schulmann
patent: 05-2 70 975 (1993-10-01), None
patent: 11-1 99 373 (1999-07-01), None

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