Patent ID: 6410433
Filing Date: 2002-06-25
Classification: C23C,H01L

Abstract:
A method of depositing a tantalum nitride (TaNx) barrier film on a semiconductor device substrate having a temperature in the range of about 300Â° C.-500Â° C., the method comprising providing a vapor of a tantalum pentachloride precursor to a reaction chamber containing said substrate by heating said precursor to a temperature sufficient to vaporize said precursor, then combining said vapor above said substrate with a process gas consisting essentially of nitrogen and hydrogen and optionally one or more of argon and helium by providing said process gas to said reaction chamber concurrently with providing said vapor to said reaction chamber to deposit said TaNx on said substrate by a thermal chemical vapor deposition (CVD) process, wherein the deposited TaNx film contains less than 2 atomic percent chlorine.