Patent ID: 7094691
Filing Date: 2006-08-22
Classification: C23C,H01L

Abstract:
1. A method of forming a tungsten nitride thin film in an integrated circuit, comprising: preparing a silicon substrate on a silicon wafer and placing the silicon wafer in a heatable chuck in a CVD vacuum chamber and heating the silicon wafer to a temperature of between about 350° C. to 430° C.; placing a known quantity of W(CO) setting the variable-temperature bubbler to a predetermined temperature; passing a carrier gas through the variable-temperature bubbler and carrying the gaseous tungsten source with the carrier gas into the CVD vacuum chamber; introducing a nitrogen-containing reactant gas into the CVD vacuum chamber; reacting the gaseous tungsten source and the nitrogen-containing reactant gas above the surface of the silicon wafer in a deposition process to deposit a polycrystalline cubic phase W completing the integrated circuit containing the W