Patent ID: 8158535
Filing Date: 2012-04-17
Classification: H01L

Abstract:
1. A method for forming an insulating film, comprising: preparing a substrate to be processed, in which silicon is exposed on a surface of the substrate; performing an oxidation process on the silicon to form a thin silicon oxide film on a surface of the silicon; performing a first nitriding process on the silicon oxide film and the silicon provided under the silicon oxide film to form a silicon oxynitride film; performing a first thermal process on the silicon oxynitride film in an N performing a second nitriding process on the silicon oxynitride film after the first thermal process is performed, wherein the first thermal process is performed at a temperature ranging from 900 to 1,200° C. and a process pressure ranging from 133.3 to 1333 Pa, and wherein the first nitriding process is performed by using a plasma of rare gas and gas containing nitrogen.