Method for forming low compressive stress fluorinated ozone/TEOS oxide film

摘要

A method and apparatus for forming a halogen-doped silicon oxide film, preferably a fluorinated silicon glass (FSG) film, having compressive stress less than about -5x108 dynes/cm2. In a specific embodiment, the FSG film is formed by a sub-atmospheric CVD thermal process at a pressure of between about 60-650 torr. The relatively thin film, besides having a low dielectric constant and good gap fill capability, has low compressive stress, and is particularly suitable for use as an intermetal (IMD) layer.