Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Separating means
Reexamination Certificate
2006-07-25
2006-07-25
Rodriguez, Joseph (Department: 3653)
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Separating means
C209S002000, C209S288000
Reexamination Certificate
active
07080742
ABSTRACT:
A method for processing polycrystalline silicon workpieces to form size distributions of polycrystalline silicon pieces suitable for use in a Czochralski-type process includes: (1) preparing a polycrystalline silicon workpiece by a chemical vapor deposition process; (2) fracturing the polycrystalline silicon workpiece into a mixture of polycrystalline silicon pieces, where the polycrystalline silicon pieces have varying sizes; and (3) sorting the mixture of polycrystalline silicon pieces into at least two size distributions. Step (2) may be carried out by a thermal shock process. Step (3) may be carried out using a rotary indent classifier. A rotary indent classifier for performing the method includes: (i) a rotating cylinder having a circumferential edge with indents arrayed in increasing size from a first end of the cylinder to a second end of the cylinder, and (ii) a conveyor running longitudinally adjacent the cylinder, for conveying silicon pieces from the first end of the cylinder to the second end of the cylinder.
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JP 09-239319, Toyota Motor Corporation, Published Sep. 16, 1997.
Arvidson Arvid Neil
Graham Todd Stanley
Horstman Terence Lee
Messner Kathryn Elizabeth
Schmidt Chris Tim
Brown Catherine U.
Hemlock Semiconductor Corporation
Rodriguez Joseph
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