Patent ID: 6413860
Filing Date: 2002-07-02
Classification: C23C,H01L

Abstract:
A method of depositing a tantalum (Ta) 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 in said reaction chamber with a process gas consisting essentially of hydrogen and optionally one or more of argon and helium, and generating a plasma in said combined vapor and process gas and reacting said combined vapor and process gas in the presence of said plasma to deposit said Ta on said substrate by a plasma enhanced chemical vapor deposition (PECVD) process, wherein the deposited Ta film contains less than 2 atomic percent chlorine.