The present invention relates to a
susceptor for manufacturing an epitaxial
wafer in which an epitaxial layer is grown through a reaction between a
wafer and a source gas in a chamber, including a pocket where an opening portion is formed for the
wafer to be arranged; a ledge portion where the wafer is supported; and a gas adjusting member that is positioned in an outer circumferential portion on an upper surface of the opening portion of the
susceptor. The gas adjusting member has a first gas adjusting member that is formed in a predetermined area which faces a
crystallization direction of the wafer <110>; a second gas adjusting member in a predetermined area that faces the
crystallization direction of the wafer <110>; and a third gas adjusting member that is formed between the first gas adjusting member and the second gas adjusting member. The first gas adjusting member, the second gas adjusting member, and the third gas adjusting member are formed to have different sizes in the areas which are formed along the circumference of the wafer, and the first, second, and third gas adjusting members are formed to have different degrees of inclination from the central direction of the wafer toward the
susceptor so as to change the gas flow. Accordingly, the different areas where the gas flow increasing and decreasing devices (gas adjusting members) are formed are formed in the outer circumferential portion of the susceptor, and thus a deviation in the thickness of the epi layer in a wafer edge portion can be decreased when the epitaxial layer is formed in the
semiconductor wafer.