Patent ID: 7413718

Claim:
A silicon production reactor comprising a reaction vessel and heating means, said reaction vessel comprising a vertically extending wall and a space surrounded by the wall, wherein the space of the reaction vessel is of slit form in cross-sectional view, said heating means being capable of heating a part, which is 90% or less of the whole length of the vertically extending wall from the bottom thereof, of the wall's surface facing the space to a temperature of not lower than the melting point of silicon, said heating means being divided into at least two sections comprised of a first heating means and a second heating means so that said heating means can control the temperature of the wall's surface facing the space in two or more divided sections comprised of upper and lower sections, or more multiple sections, and, said silicon production reactor being adapted to flow raw gas for silicon deposition from an upper part of the space of the reaction vessel toward a lower part thereof.