Patent ID: 6828182
Filing Date: 2004-12-07
Classification: C30B,H01L

Abstract:
A method for selectively forming an epitaxial thin film on a semiconductor substrate by controlling a flow rate of a source gas supplied to a deposition ambient, comprising:determining a relation between a growth rate of an epitaxial thin film and flow rate of a source gas by changing the flow rate of the source gas supplied to a deposition ambient at a fixed temperature, including identifying a mass transfer limited region where the growth rate of the epitaxial thin film is approximately proportional to the flow rate of the source gas, a kinetically limited region where the growth rate of the epitaxial thin film is approximately independent of the flow rate of the source gas, and an intermediate region between the mass transfer limited region and the kinetically limited region; and supplying the source gas at the flow rate corresponding to the intermediate region to form the epitaxial thin film on a semiconductor substrate.