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Novara, Italy

MEMC Electronic Materials is a United States manufacturer of silicon wafers for the semiconductor industry. Originally established in 1959 as the Monsanto Electronic Materials Company, a business unit of Monsanto Company, the company is based in St. Peters, Missouri. Ahmad Chatila is the current President and Chief Executive Officer of MEMC. Mr. Chatila was appointed President and Chief Executive Officer and a member of the Board of Directors of MEMC on March, 2nd 2009. Wikipedia.


Patent
MEMC Electronic Materials | Date: 2013-03-14

A system for growing an ingot from a melt includes a first crucible, a second crucible, and a weir. The first crucible has a first base and a first sidewall that form an outer cavity for containing the melt. The weir is located on top of the first base at a location inward from the first sidewall to inhibit movement of the melt from a location outward of the weir to a location inward of the weir. The second crucible is sized for placement within the outer cavity and has a second base and a second sidewall that form an inner cavity. Related methods are also disclosed.


Patent
MEMC Electronic Materials | Date: 2013-03-15

A system for growing a crystal ingot from a melt includes a first crucible, a second crucible, and a weir. The first crucible has a first base with a top surface and a first sidewall that form a first cavity. The second crucible is located within the first cavity of the first crucible, and has a second base and a second sidewall that form a second cavity. The second base has a bottom surface that is shaped to allow the second base to rest against the top surface of the first base. The second crucible includes a crucible passageway to allow movement of the melt therethrough. The weir is located inward from the second sidewall to inhibit movement of the melt from a location outward of the weir to a location inward of the weir.


Patent
MEMC Electronic Materials | Date: 2013-01-03

Systems and methods are provided for processing abrasive slurry used in cutting operations. The slurry is mixed with a first solvent in a tank. The slurry is vibrated and/or ultrasonically agitated such that abrasive grain contained in the slurry separates from the other components of the slurry and the first solvent. After the abrasive grain has settled to a bottom portion of the container, the other components of the slurry and the first solvent are removed from the tank. The abrasive grain may then be washed with a second solvent. The abrasive grain is then heated and is suitable for reuse in an abrasive slurry.


Patent
MEMC Electronic Materials | Date: 2013-03-13

A method of removing dust from granular polysilicon includes introducing a stream of granular polysilicon, dispersing the longitudinal stream of granular polysilicon by redirecting the stream into a radially outward flow having a circular pattern, and introducing a counter flow of gas in an opposite direction to that of the longitudinal stream of granular polysilicon to contact the radially outward flow to separate the dust from the granular polysilicon.


Patent
MEMC Electronic Materials | Date: 2013-03-14

A method for determining the efficiency of a chemical conversion within a gas decomposition reactor having an inlet and an exhaust outlet is disclosed. The method includes measuring a chemical composition of an exhaust gas located within the exhaust outlet using Raman spectra. The measured chemical composition is compared to a set of values. A flow of an inlet gas through the inlet is adjusted to change a subsequently measured chemical composition of a subsequent exhaust gas located within the gas outlet.

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