Patent ID: 6939760
Filing Date: 2005-09-06
Classification: C23C,H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising a metal oxide film formed on a semiconductor substrate using a chemical vapor deposition method, said method comprising: a dual-stage deposition step comprising a first stage for introducing both a material gas containing a specified metal and an oxidizing gas into a reactor in which said semiconductor substrate is placed and a second stage for subsequently introducing a second oxidizing gas into said reactor; wherein said oxidizing gas at said first stage is introduced in such a manner as to be less than a flow rate of said second oxidizing gas introduced at said second stage; wherein said metal oxide film as an oxide of said specified metal is formed on said semiconductor substrate, by repeating said dual-stage deposition step two or more times; and a deposition temperature of said metal oxide film is set in such a temperature range that a reaction of said material gas is non-self-limited in one cycle of said dual-stage deposition step.