Patent ID: 6746941
Filing Date: 2004-06-08
Classification: C23C,C30B,H01L

Abstract:
A production method for a semiconductor wafer in which a semiconductor raw material gas is supplied to over a main surface of a semiconductor single crystal substrate in rotation in a reaction chamber in one direction in almost parallel to the main surface thereof from a plurality of gas inlet ports disposed in a width direction of the reaction chamber to grow a semiconductor thin film on the main surface of the semiconductor single crystal substrate, characterized by that a dopant gas is supplied through gas inlet ports in an inner side among the plurality of gas inlet ports,wherein the plurality of gas inlet sorts are composed of three kinds including an inner inlet port disposed at an innermost side of a reaction chamber in a width direction thereof, an outer inlet port disposed at an outermost side thereof in the width direction and a middle inlet port disposed between the inner inlet port and the outer inlet port and gas inlet ports disposed in an inner side among the plurality of gas inlet ports include the inner inlet port and the middle inlet port, and wherein amounts of a dopant gas supplied from the inner inlet port and the middle inlet port are individually controlled.