Patent ID: 8187382
Filing Date: 2012-05-29
Classification: C01B,C23C,Y10T

Abstract:
1. A polycrystalline silicon manufacturing apparatus which supplies raw gas to the inside of a reaction furnace and supplies a current from an electrode to a silicon seed rod in a state where the vertically extending silicon seed rod is uprightly stood on each of the plural electrodes disposed in a bottom plate portion of the reaction furnace so as to heat the silicon seed rod and thus to deposit polycrystalline silicon on a surface of the silicon seed rod by means of the reaction of the raw gas, wherein at least a part of the plural electrodes is configured as a two-holding electrode which holds two silicon seed rods; each two-holding electrode includes only one electrode holder which is inserted in a perforation hole formed in the bottom plate portion and a pair of seed rod holding portions which are formed in an upper end portion of the electrode holder so as to have an interval therebetween; the pair of seed rod holding portions are supported by the electrode holder with respect to the bottom plate; a cooling passageway is formed in the inside of the electrode holder so as to flow a cooling medium; and a lower end portion of the electrode holder perforating the bottom plate portion is connected to a cooling pipe communicating with the cooling passageway.