Patent ID: 7727483

Claim:
A reaction apparatus for chlorosilane compound comprising: a tubular reaction vessel being made of a carbon material, and a gas supply port formed on an upper side of the reaction vessel for supplying chlorosilanes and hydrogen to the reaction vessel, wherein the tubular reaction vessel defines a reaction portion and a non-reaction portion, the reaction portion extending from a bottom end portion of the reaction vessel to a predetermined height in the reaction vessel, the reaction portion having an inside face to which silicon is deposited, the non-reaction portion of the reaction vessel being provided at an upper section of the reaction vessel, the non-reaction portion of the reaction vessel including an inside face and an outside face, wherein the inside face or the outside face of the non-reaction portion of the reaction vessel includes a gas penetration preventing coating for preventing chlorosilanes supplied to the reaction vessel from penetrating a pipe wall of the reaction vessel, and wherein the chlorosilanes and hydrogen are supplied in such a way that an amount of hydrogen to a total amount of hydrogen and chlorosilanes exceeds 80 mol % and a differential pressure between an inlet on the upper side and an outlet on the bottom end portion side in the reaction portion exceeds 10 kPa.