Patent ID: 7378358
Filing Date: 2008-05-27
Classification: H01L

Abstract:
1. A method for forming an insulating film on a silicon-containing substrate to be processed, comprising: forming a gas mixture by mixing a nitrogen containing gas and an oxygen containing gas, the nitrogen containing gas being a nitrogen gas or a nitrogen compound gas and the oxygen containing gas being an oxygen gas or an oxygen compound gas; exciting the gas mixture using a high frequency plasma to produce nitrogen radicals and oxygen radicals; supplying the nitrogen radicals and the oxygen radicals to a surface of the substrate; and creating an insulating film containing nitrogen using the nitrogen radicals and the oxygen radicals on the surface of the substrate, wherein, when the gas mixture is formed, at least one of the oxygen containing gas and the nitrogen containing gas is provided intermittently, and wherein, when the gas mixture is formed, a ratio between a gas supplying time and a gas stoppage time for each of said at least one of the oxygen containing gas and the nitrogen containing gas varies with time, the gas supplying time being an amount of time during which each of said at least one of the oxygen containing gas and the nitrogen containing gas is supplied, and the gas stoppage time being an amount of time during which each of said at least one of the oxygen containing gas and the nitrogen containing gas is not supplied.