Patent ID: 6313004
Filing Date: 2001-11-06
Classification: H01L

Abstract:
A method for manufacturing semiconductor devices, comprising the steps of:forming a silicon film on a semiconductor substrate;conducting heat treatment on said silicon film in an atmosphere of a gas containing silicon, to form hemi-spherical silicon grains to a surface of said silicon film; andconducting heat treatment in a phosphorus diffusion apparatus at a prescribed temperature in an atmosphere of a mixture gas containing a gas containing halogen and phosphorus as constituent elements and an oxygen gas, to diffuse phosphorus into said hemi-spherical silicon grains,wherein said heat treatment in the phosphorus diffusion apparatus is performed in a range of a mixture ratio in mole of said gas containing halogen and phosphorus against said oxygen gas such that corrosion of silicon is suppressed and also in such a situation that accelerated oxidation of silicon does not occur.