Growth of doped crystals

Details Growth of doped crystals Growth of doped crystals

1975-05-27

1977-09-27

Yudkoff, Norman

Chemistry: physical processes

Physical processes

Crystallization

23304, 23302R, 156605, 156616R, 2523074H, B01D 900, B01J 1708, B01J 1736, C01D 300

Patent

active

040509052

ABSTRACT:
Large, doped crystal ingots are grown in a Stockbarger furnace from a melt of an alkali metal or alkaline earth metal salt using very slow oscillation (1 - 2 cycles per minute) of the ingot through a small arc of 5.degree. -20.degree. to produce an ingot having a more even distribution of dopant and an absence of open boundaries between macrocrystals within the ingot.

REFERENCES:
patent: 2149076 (1939-02-01), Stockbarger
patent: 2835614 (1958-05-01), Pohl
patent: 3342560 (1967-09-01), Eckardt et al.
patent: 3615262 (1971-10-01), Kappelmeyer et al.
patent: 3925108 (1976-08-01), Woodbury et al.
patent: 3926566 (1975-12-01), Spurney
Plovnick et al., "A Dopant Injector for Crystal Pulling Furnaces," Rev. Sci. Instrum. USA, vol. 41, No. 8, pp. 1248-1249, (Aug. 1970).

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