Processes for the continuous preparation of single crystals

Details Processes for the continuous preparation of single crystals Processes for the continuous preparation of single crystals

1983-05-11

1986-01-21

Bernstein, Hiram H.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156DIG96, C30B 1534

Patent

active

045656002

ABSTRACT:
Processes for the continuous preparation of single crystals having a predetermined shape and requiring little or no subsequent machining which processes comprise placing a single crystal-forming material in a crucible fitted in its lower portion with a capillary conduit having a length equal to or greater than the retention length of the molten material in the capillary at the selected temperature and pressure, heating the crystal-forming material to a temperature above its melting point, bringing a performed appropriately oriented crystal seed into contact with the pendant drop formed at the lower point of the capillary, and pulling the seed crystal away from the feed material in the crucible so that the amount of crystal-forming material fed per unit of time is at every instant substantially equal to the quantity of material pulled into single crystal form, together with novel apparatus comprising a capillary-containing crucible, heating means, feed means, enclosure, seed-supporting carrier, means for moving and rotating the carrier, and means for controlling the movement of the carrier.

REFERENCES:
patent: 2876147 (1959-03-01), Kniepkemp
patent: 3393054 (1968-07-01), Rupprecht et al.
patent: 3755011 (1973-08-01), Kleinknecht
patent: 3915662 (1975-10-01), LaBelle
patent: 4022652 (1977-05-01), Hirano et al.
patent: 4108714 (1978-08-01), Keller et al.
LaBelle, Mat. Res. Bull., vol. 6, #7, pp. 581-590, 1971.

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