Patent ID: 6821871
Filing Date: 2004-11-23
Classification: C23C,H01L

Abstract:
A method for manufacturing a semiconductor device, comprising the steps of:transferring a substrate into a reaction chamber on whose surface a silicon film in a mixed crystal state consisting of both amorphous and polycrystalline forms has been formed; raising a temperature of the substrate to a process temperature from a room temperature; and diffusing phosphorus in the silicon film, wherein the diffusing step includes a diffusing step that diffuses the phosphorus in the silicon film to obtain the uniformity of the phosphorus concentration in the surface of the substrate to be less than Â±3%, by exposing the substrate to phosphine or a mixed gas containing phosphine by supplying phosphine or the mixed gas containing phosphine to a reaction chamber through a gas supply pipe at some midpoint in the step in which the temperature of the substrate is raised to the process temperature from the room temperature.