Patent ID: 8012885
Filing Date: 2011-09-06
Classification: H01L

Abstract:
1. A manufacturing method of a semiconductor device for: placing in a processing chamber a substrate that has at least a silicon surface and an insulating film surface on a surface, and in which a natural oxide film or impurities is formed on the silicon surface and the insulating film surface; and forming a silicon single crystal film selectively only on the silicon surface by using a substrate processing apparatus for heating an atmosphere in the processing chamber and the substrate, using a heating unit disposed outside of the processing chamber, the manufacturing method comprising: a substrate loading step of loading the substrate into the processing chamber; a pre-processing step of supplying dichlorosilane gas and hydrogen gas into the processing chamber while maintaining a temperature of the substrate and an inside of the substrate processing chamber to a prescribed temperature of 800° C. or less, and removing the natural oxide film or the impurities formed on the silicon surface and the insulating film surface; a first epitaxial growing step of supplying the dichlorosilane gas and the hydrogen gas to the processing chamber under the same flow rate condition as that of the pre-processing step, and forming a first silicon single crystal film selectively only on the silicon surface; a second epitaxial growing step of supplying the dichlorosilane gas and hydrogen gas to the processing chamber under the same flow rate condition as that of the pre-processing step, and further supplying a second chlorine-based gas in addition to the dichlorosilane gas, and forming a second silicon single crystal film selectively on the first silicon single crystal film formed by the first epitaxial growing step; and a substrate unloading step of unloading the substrate to outside of the processing chamber.