Patent ID: 6251190
Filing Date: 2001-06-26
Classification: C23C,H01L

Abstract:
A substrate processing system for forming a gate electrode connection structure comprising:(A) a housing for forming a vacuum chamber; a substrate holder, located within said housing, for holding a substrate containing a gate electrode, in said vacuum chamber;(B) a substrate moving system for moving said substrate into said vacuum chamber and positioning said substrate on said substrate holder;(C) a gas delivery system for introducing a process gas into said vacuum chamber to deposit a layer over said substrate to form said gate electrode connection structure;(D) a temperature control system for maintaining a selected temperature within said vacuum chamber;(E) a pressure control system for maintaining a selected pressure within said vacuum system;(F) an RF power supply for supplying RF energy to said vacuum chamber;(G) a system controller for controlling said substrate moving system, said gas delivery system, said temperature control system, said pressure control system and said RF power supply; and(H) a memory coupled to said system controller comprising a computer-readable medium having a computer-readable program embodied therein for directing operation of said substrate processing system, said computer-readable program comprising:(i) a set of tungsten nitride deposition instructions for controlling said gas delivery system, said pressure control system, and said RF power supply to form a deposition plasma in said vacuum chamber from a gaseous mixture comprising nitrogen gas and a tungsten-containing gas whereby a tungsten nitride diffusion barrier is deposited on said gate electrode; and(ii) a set of tungsten deposition instructions for controlling said gas delivery system, said temperature control system, and said pressure control system to maintain a selected temperature and pressure within said vacuum chamber that are suitable for depositing a tungsten film on top of said tungsten nitride diffusion barrier thereby forming an electrical connection to said gate electrode.