Single-crystal – oriented-crystal – and epitaxy growth processes; – Apparatus – For forming a platelet shape or a small diameter – elongate,...
Patent
1996-04-08
1997-03-25
Niebling, John
Single-crystal, oriented-crystal, and epitaxy growth processes;
Apparatus
For forming a platelet shape or a small diameter, elongate,...
117900, 136250, H01L 3118, C30B 3500
Patent
active
056140207
ABSTRACT:
A method and apparatus for forming semiconductor particles (42) for solar cells using an optical furnace (30). Uniform mass piles (26) of powered semiconductor feedstock are almost instantaneously optically fused to define high purity semiconductor particles without oxidation. The high intensity optical energy is directed and focused to the semiconductor feedstock piles (26) advanced by a conveyer medium (16) thereunder. The semiconductor feedstock piles (26) are at least partially melted and fused to form a single semiconductor particle (42) which can be later separated from a refractory layer (18) by a separator (50), preferably comprised of silica. The apparatus (10) and process is automated, providing a high throughput to produce uniform mass, high quality spheres for realizing high efficiency solar cells. The apparatus is energy efficient, whereby process parameters can be easily and quickly established.
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Padovani Francois A.
Stevens Gary D.
Donaldson Richard L.
Kesterson James C.
Klinger Robert C.
Mulpuri S.
Niebling John
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