Arrangement for the complete emptying of quartz tanks or crucibl

Details Arrangement for the complete emptying of quartz tanks or crucibl Arrangement for the complete emptying of quartz tanks or crucibl

1988-12-23

1990-04-03

Cusick, Ernest G.

Fluent material handling, with receiver or receiver coacting mea

Combined

141 65, 141 82, 422249, 239379, 239 38, 156DIG64, 156DIG97, B01D 900

Patent

active

049131990

ABSTRACT:
A method and device for the complete emptying of flat quartz tanks or crucibles filled with silicon melt is provided. The apparatus includes an open outlet nozzle located in a floor of the tank and a tube-shaped, rod-shaped, or channel-shaped member composed of a material that is well-wettable by silicon melt that is brought into contact with the outlet nozzle after the conclusion of the drawing process. The member is in fluid communication with a collecting vessel. The outlet nozzle is so constructed and arranged that the silicon melt adjacent at the nozzle aperture is prevented from running out during the band drawing due to the curvature pressure of its downwardly, convexly arced surface. The apparatus can be used in continuous, horizontal band-drawing of silicon for solar cells.

REFERENCES:
patent: 4226834 (1980-10-01), Shudo et al.
patent: 4289571 (1981-09-01), Jewett
patent: 4563976 (1986-01-01), Foell et al.
patent: 4822585 (1989-04-01), Dawless
C. A. Rhodes et al., "Investigation of the Meniscus Stability in Horizontal Crystal Ribbon Growth", Journal of Crystal Growth 50 (1980) pp. 94-101.

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