Patent ID: 8303712

Claim:
A substrate processing apparatus, comprising: a process vessel configured to accommodate and process a plurality of substrates stacked vertically, each of the plurality of substrates being held horizontally; a gas introduction port installed in a first manifold of the process vessel and configured to introduce a gas into the process vessel from the lateral side of the substrate; a gas exhaust port installed in a second manifold of the process vessel opposite to the gas introduction port, and configured to exhaust the gas inside the process vessel from the lateral side of the substrate; and a first slope part and a second slope part installed between the first manifold and the second manifold inside the process vessel with the plurality of substrates disposed therebetween, the first slope part sloped in a direction different from that of the gas introduction port and the second slope part sloped in a direction different from that of the gas exhaust port in a manner that a surface of the first slope part and a surface of the second slope part are both perpendicular to a principle surface of any one of the plurality of substrates to define a flow path of the gas in z-shape for guiding the gas to flow parallel to the principle surface of any one of the plurality of substrates.