Wacker Chemie Ag
Wacker Chemie Ag, Munich DE
Patent application number | Description | Published |
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20130150547 | PRODUCTION OF HIGH-MOLECULAR-WEIGHT SILICONE RESINS - Silicone resins with a weight average molecular weight of at least 5000 g/mol and polydispersity of ≦65 are prepared by hydrolyzing and condensing: | 06-13-2013 |
Wacker Chemie Ag, Muenchen DE
Patent application number | Description | Published |
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20130177493 | POLYCRYSTALLINE SILICON - The invention provides polycrystalline silicon having concentrations of dopants of 1-10 ppta of boron, 1-20 ppta of phosphorus, 1-10 ppta of arsenic, 0.01-1 ppta of aluminum, and having a charge carrier lifetime of at least 2000 and at most 4500 μs. | 07-11-2013 |
20130189176 | LOW-DOPANT POLYCRYSTALLINE SILICON CHUNK - The invention provides a polycrystalline silicon chunk having a concentration of 1-50 ppta of boron and 1-50 ppta of phosphorus at the surface. | 07-25-2013 |
Wacker Chemie Ag US
Patent application number | Description | Published |
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20130216466 | CHUNK POLYCRYSTALLINE SILICON AND PROCESS FOR CLEANING POLYCRYSTALLINE SILICON CHUNKS - The invention provides chunk polycrystalline silicon having a concentration of carbon at the surface of 0.5-35 ppbw. A process for cleaning polycrystalline silicon chunks having carbon contaminations at the surface, includes a thermal treatment of the polycrystalline silicon chunks in a reactor at a temperature of 350 to 600° C., the polycrystalline silicon chunks being present in an inert gas atmosphere during the thermal treatment, and the polycrystalline silicon chunks after the thermal treatment having a concentration of carbon at the surface of 0.5-35 ppbw. | 08-22-2013 |
20140004030 | POLYCRYSTALLINE SILICON PORTION AND METHOD FOR BREAKING A SILICON BODY | 01-02-2014 |