Patent ID: 6156382
Filing Date: 2000-12-05
Classification: C23C,H01L

Abstract:
A chemical vapor deposition process for depositing a tungsten film on a substrate, said process comprising:(a) placing a substrate in a deposition zone;(b) introducing a tungsten-containing source and a first reduction agent into said deposition zone during a nucleation process stage;(c) during a first process stage after said nucleation process stage, introducing a group III or V hydride into said deposition zone without introducing a tungsten-containing source into said deposition zone; and(d) during a second process stage after said first stage,(i) introducing a process gas comprising a tungsten-containing source, a group III or V hydride and a second reduction agent into said deposition zone, and(ii) maintaining the deposition zone at process conditions suitable for depositing a tungsten layer on said substrate.