Chemical vapor deposition apparatus

A chemical vapor deposition apparatus comprising:

• a reaction chamber comprising a susceptor on which a wafer is loaded and a reaction furnace in which the wafer is processed by chemical vapor deposition;
• a gas introduction unit disposed at an outer wall of the reaction chamber to supply a reaction gas from an outside of the reaction furnace to a center portion of the reaction furnace;
• a gas exhaust unit disposed at a center portion of the reaction chamber to discharge the reaction gas to an upper or lower outside of the reaction chamber after the reaction gas is used for a reaction in the reaction furnace;
• a flow control unit disposed between the gas introduction unit and the gas exhaust unit so as to make a uniform gas flow from the gas introduction unit to the gas exhaust unit, wherein the flow control unit comprises:
• a barrier wall disposed at the outside of the reaction furnace to define the reaction furnace in the reaction chamber and introduce the reaction gas supplied from the gas introduction unit into the reaction furnace while adjusting a pressure of the reaction gas;
• a plurality of gas chambers disposed between the outer wall of the reaction chamber and the barrier wall for storing the reaction gas supplied from the gas introduction unit and supplying the reaction gas through the barrier wall;
• and at least one dividing member separating the gas chambers, a vortex preventing unit disposed in the reaction chamber on an upper surface thereof, having a surface disposed above the susceptor and facing the susceptor, in a manner such that a distance between the susceptor and the upper surface of the reaction chamber gradually decreases toward the gas introduction unit so as to prevent a vortex from being generated in the reaction chamber.