Patent ID: 9518339
Filing Date: 2016-12-13
CPC Classification: C23C,C30B,H01L

Claim Text:
1. An epitaxial growth method for growing an epitaxial film on a surface of a semiconductor wafer by mounting the semiconductor wafer within a susceptor pocket of a susceptor, the susceptor comprising a substantially circular bottom wall having an upper surface and a lower surface that forms a back surface of the susceptor and a sidewall encompassing the bottom wall to form a pocket for mounting the semiconductor wafer, wherein a plurality of through-holes that pass through said bottom wall and form circular or polygonal openings in the upper surface and the lower surface of said bottom wall, each of the through-holes having a linear axis extending from the upper surface to the lower surface of said bottom wall, are provided in the bottom wall within a region of up to approximately half the radius of the bottom wall from the outer periphery to the center, in a radial direction, with the through-holes being included within at least the region of the bottom wall on which the semiconductor wafer is mounted; flowing source gas and a first carrier gas on an upper surface side of the susceptor; and flowing a second carrier gas on a lower surface side of the susceptor to create a negative pressure on the lower side of the susceptor and cause a part of the source gas flowing on the upper surface side of the susceptor to flow down to the lower side of the susceptor via the through-holes.