Patent ID: 9193596
Filing Date: 2015-11-24
Classification: C01B,C22C,Y02P

Abstract:
1. A process for producing polycrystalline silicon comprising: feeding a silicon raw material gas into a reactor, and performing a deposition reaction of polycrystalline silicon in a state where a temperature of an inner surface of an inner wall of the reactor is controlled at a temperature of not less than 100° C. and not more than 370° C., wherein the inner surface comprises an alloy material having a composition for which a value R, defined by R=[Cr]+[Ni]−1.5 [Si], is not less than 40%, wherein [Cr] is a mass content of chromium in mass %, [Ni] is a mass content of nickel in mass %, and [Si] is a mass content of silicon in mass %.