Patent ID: 9171994
Filing Date: 2015-10-27
Classification: C23C,H01L

Abstract:
1. A method of forming a semiconductor epitaxial thin film, the method comprising: stacking and mounting a plurality of wafers on a wafer holder at predetermined intervals, and loading the wafer holder into an inner tube of a reaction chamber, the reaction chamber including the inner tube having an inner space and an outer tube tightly sealing the inner tube; providing a plurality of guide units arranged at predetermined intervals in a direction vertical to the wafer holder; spraying, from a location, an external reaction gas to the wafers through a gas supply unit which extends between the inner tube and the wafer holder vertically in a wafer stacking direction; and allowing the reaction gas sprayed from the gas supply unit to flow to the surfaces of the wafers, thereby growing a semiconductor epitaxial thin film on the surfaces of the wafers, wherein each of the plurality of guide units has a cross-sectional area which decreases in a direction from the wafers toward said location so as to guide the flow of the reaction gas such that the reaction gas sprayed from the gas supply unit flows to the top and bottom surface of the respective wafers, wherein the semiconductor epitaxial thin film grown on the surface of the wafer is sequentially grown to be a first-conductivity-type semiconductor layer, an active layer, and a second-conductivity-type semiconductor layer, thereby forming a light emitting structure.