APPARATUS FOR PRODUCING CZOCHRALSKI-GROWN SINGLE CRYSTALS

摘要

An apparatus (10) for producing a single crystal (18) grown by Czochralski method includes a plurality of grip arms (39) each having a grip finger (38) engageable with a downwardly facing engagement step (32) formed on an upper part of the single crystal (18), and a ring (40) slidably fitted around a plurality of grip arms (39) to hold the grip arms (39) in a closed position in which the engagement step (32) of the single crystal (18) is firmly gripped by the grip fingers (38) against detachment. The apparatus having such ring (40) is particularly advantageous when used for the production of a heavy single crystal in which instance the grip arms (39) are forced to spread apart by the weight of the single crystal.