Importance

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Abstract

Crystal grower and purification stations immersed within crystal growing furnaces have preparation chambers with circular, elliptical, rectangular or polygonal cross-sections. A lateral heater and a base heater are connected for immersion mounting within the preparation chamber. A porous distributor is mounted above the base heater for immersion within the chamber. An opening or openings in a bottom of the chamber releases crystal material to a crucible or crucibles. A lid mounted on the chamber closes the chamber and forms an enclosed chamber with a closed environment. A crystal material supply, a dopant supply and a reduced pressure exhaust line are connected to the chamber. A purification substance supply is connected to the chamber with fluid purification substances supplied to the porous distributor. An external heater surrounds the chamber for heating the chamber and its contents. Insulation surrounds the external heater. An enclosure surrounds the insulation. A gas source and a vacuum line are connected to the enclosure. The external heater includes plural heaters which extend beyond the chamber. A grower mounted below the chamber and within the enclosure receives the crystal material from the chamber. A crucible in the grower receives the crystal material and holds molten crystal material and a formed crystal. A seed crystal and solid crystal support are mounted within the plural heaters for relatively moving a formed crystal within the plural heaters. A cooler cools the seed.

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First Claim