Continuous refill crystal growth method

Details Continuous refill crystal growth method Continuous refill crystal growth method

1991-08-20

1993-01-12

Kunemund, Robert

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156606, 15661641, 156DIG71, 252 626, 252 6262, 252 6263, C30B 1100

Patent

active

051787199

ABSTRACT:
Large crystals of alkali halide materials are presently produced using the Bridgman-Stockbarger method and result in state-of-the-art crystals of up to 30" in diameter and 20" in height. Both residual impurity concentrations and dopant concentrations have been difficult to control because the segregation coefficients are not equal to unity. As a result, the residual impurity and dopant concentrations can vary drastically across the length of the crystal. By adding additional charging material to the melt during the crystallization process, the residual impurity and dopant concentrations can be kept nearly constant throughout the length of the crystal. By adding charging material to the melt during crystallization, the overall length of a manufactured crystal can be increased dramatically.

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