H - Electricity – 01 – L
Patent
H - Electricity
01
L
H01L 31/028 (2006.01) H01L 31/036 (2006.01) H01L 31/0368 (2006.01) H01L 31/18 (2006.01)
Patent
CA 2107975
The invention relates to techniques for manufacturing columnar-grained polycrystalline sheets which have particular utility as substrates or wafers for solar cells. The sheet is made by applying granular silicon to a setter material which supports the granular material. The setter material and granular silicon are subjected to a thermal profile all of which promote columnar growth by melting the silicon from the top downwardly. The thermal profile sequentially creates a melt region at the top of the granular silicon and then a growth region where both liquid and a growing polycrystalline sheet layer coexist. An annealing region is created whets the temperature of the grown polycrystalline silicon sheet layer is controllably reduced to effect stress relief.
Barnett Allen M.
Brown Jacob E.
Checchi Joseph C.
Ford David H.
Hall Robert B.
Astropower Inc.
Barnett Allen M.
Borden Ladner Gervais Llp
Brown Jacob E.
Checchi Joseph C.
LandOfFree
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