Patent ID: 6338880
Filing Date: 2002-01-15
Classification: C23C

Abstract:
A process for forming a predominantly titanium nitride film having less than about 5% carbon impurities by weight and a sheet resistance of approximately 1 to 10 ohms per square on a substrate, said process comprising:placing the substrate within a chemical vapor deposition chamber maintained at a sub-atmospheric pressure; premixing a tertiary-butyltris-dimethylamido-titanium and a nitrogen-containing gas in a premixing chamber; admitting the premixed gas-phase tertiary-butyltris-dimethylamido-titanium and nitrogen-containing gas into said chemical vapor deposition chamber; applying a plasma generation system to convert said tertiary-butyltris-dimethylamido-titanium and said nitrogen-containing gas into radicals, ions and metastables; heating said substrate to a temperature ranging from about 350Â° C. to about 700Â° C.; and forming said predominantly titanium nitride film having less than about 5% carbon impurities by weight and an as deposited sheet resistance of approximately 1 to 10 ohms per square on said substrate.