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Removing a sheet from the surface of a melt using elasticity and buoyancy

United States Patent

July 1, 2014
View the Complete Patent at the US Patent & Trademark Office
Embodiments related to sheet production are disclosed. A melt of a material is cooled to form a sheet of the material on the melt. The sheet is formed in a first region at a first sheet height. The sheet is translated to a second region such that it has a second sheet height higher than the first sheet height. The sheet is then separated from the melt. A seed wafer may be used to form the sheet.
Kellerman; Peter L. (Essex, MA), Sun; Dawei (Nashua, NH), Helenbrook; Brian (Potsdam, NY), Harvey; David S. (Westford, MA)
Varian Semiconductor Equipment Associates, Inc. (Gloucester, MA)
13/ 039,808
March 3, 2011
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of contract number DE-EE0000595 awarded by the U.S. Department of Energy.