Patent ID: 8420167

Claim:
A method of manufacturing a semiconductor device, comprising the steps of: conveying a plurality of substrates disposed in a direction perpendicular to a substrate processing surface into a processing chamber provided inside of a reaction tube, with an outer periphery surrounded by a heating device; and processing the substrates by introducing a process gas or an inert gas to a gas inlet tube provided on a side face of the reaction tube in a region for processing the substrates inside the reaction tube, so as to reach at least an outside of the heating device, and spouting the process gas or the inert gas into the processing chamber from a gas spouting port disposed in a form so as to straddle at least a plurality of the substrates in a direction perpendicular to the substrate processing surface and having an opening area identical to a cross-sectional area of the gas inlet tube in the direction perpendicular to the substrate processing surface.