Patent ID: 6468926
Filing Date: 2002-10-22
Classification: H01L

Abstract:
A manufacture method for a semiconductor device comprising the steps of:(a) transporting a silicon wafer into a reaction chamber having at least first and second gas introducing inlet ports and sealing the reaction chamber with an O-ring; (b) after said step (a), introducing an oxidizing atmosphere into the reaction chamber via the first gas introducing inlet port and raising a temperature of the silicon wafer to an oxidation temperature while maintaining the oxidizing atmosphere in the reaction chamber; (c) after said step (b), introducing a wet oxidizing atmosphere into the reaction chamber via the first gas introducing inlet port while the oxidation temperature is retained, to form a thermal oxide film on a surface of the silicon wafer; (d) after said step (c), purging gas in the reaction chamber by using inert gas to lower a residual water concentration to less than about 1000 ppm; and (e) after said step (d), introducing an NO or N2O containing atmosphere into the reaction chamber via the second gas introducing inlet port while the silicon wafer is maintained at an annealing temperature of at least 700Â° C. and higher than the oxidation temperature, to introduce nitrogen into the thermal oxide film and to form an oxynitride film.