Patent ID: 7960254

Claim:
A manufacturing method for an epitaxial wafer using a vapor phase growth system that is provided with a susceptor, the susceptor having on an upper face thereof a substantially round and concave shaped wafer placement portion, on which a semiconductor wafer is placed and, on a bottom face thereof, a plurality of through holes through which lift pins that move the semiconductor wafer up and down are inserted, on a lift pin installation circle that is concentric with the wafer placement portion, comprising: an oxide film forming step in which a hydrophilic portion consisting of an oxide film is formed on a back surface of the semiconductor wafer; an etching step in which a hydrophobic portion that exposes a back surface of the semiconductor wafer is provided by removing a portion of the oxide film in a circular shape that is concentric with the semiconductor wafer, after the oxide film forming step; a wafer placing step in which the semiconductor wafer is placed on the wafer placement portion so that the back surface of the semiconductor wafer faces downward after the etching step; and an epitaxial growth step in which an epitaxial layer is grown on a main surface of the semiconductor wafer after the wafer placing step, wherein the diameter of the lift pin installation circle is smaller than the diameter of the hydrophobic portion.