Patent ID: 8591654

Claim:
A device for manufacturing a SiC single crystal comprising: a raw material gas introduction pipe introducing a raw material gas, which provides crystal growth of the SiC single crystal; a raw material gas heat chamber having a cylindrical shape with a hollow center, wherein the hollow center of the raw material gas heat chamber provides a raw material gas supply passage, the cylindrical shape of the raw material gas heat chamber provides a first sidewall, the raw material gas supply passage flows the raw material gas introduced from the raw material gas introduction pipe, and the raw material gas heat chamber heats the raw material gas when the raw material gas flows through the raw material gas supply passage; a reaction chamber having a cylindrical shape with a bottom, wherein the cylindrical shape of the reaction chamber provides a second sidewall, an inner surface of the second sidewall contacts an outer surface of the first sidewall so that the bottom of the reaction chamber is disposed opposite to the raw material gas heat chamber, and a SiC single crystal substrate as a seed crystal is arranged on the bottom of the reaction chamber so that the raw material gas heated by the raw material gas heat chamber is supplied to the SiC single crystal substrate; and a discharge pipe disposed in the hollow center of the raw material gas heat chamber, wherein the raw material gas supply passage is disposed between an outer surface of the discharge pipe and an inner surface of the first sidewall, wherein the raw material gas supply passage supplies the raw material gas to the reaction chamber opposite an outer periphery of the SiC single crystal substrate, wherein the discharge pipe evacuates a residual gas of the raw material gas, which is not used for the crystal growth of the SiC single crystal from the reaction chamber at a point opposite the center of the SiC single crystal substrate, wherein the discharge pipe has a cylindrical shape with a bottom and an input opening, the input opening being positioned opposite the center of the SiC single crystal substrate, wherein the cylindrical shape of the discharge pipe provides a third sidewall, wherein an outer diameter of the third sidewall is smaller than an inner diameter of the first sidewall, and wherein the outer diameter of the third sidewall is smaller than a radial dimension of the SiC single crystal substrate.