Patent ID: 6652718
Filing Date: 2003-11-25
Classification: C23C,H01L

Abstract:
A method of forming a Ti layer and a TiN layer on an integrated circuit substrate in a single PVD deposition chamber without using either a collimator or a shutter, comprising the steps:(a) providing a hollow cathode target containing titanium, said hollow cathode target having a cavity region; (b) providing a substrate within said chamber under said hollow cathode target, said substrate attached to an electrostatic chuck; (c) forming a layer containing Ti on said substrate by sputtering Ti from said target within said cavity region; (d) forming a layer containing TiN on said substrate by sputtering Ti from said target within said cavity region while simultaneously flowing a nitrogen-containing gas into said deposition chamber outside of said cavity region thereby preventing said nitrogen-containing gas from reaching said hollow cathode target and avoiding any risk of nitrogen contaminating a subsequent Ti deposition process performed after the deposition of the layer containing TiN on said substrate; and (e) applying an RF bias to said electrostatic chuck to resputter at least one of said layer containing Ti on said substrate of step (c) or said layer containing TiN on said substrate of step (d), wherein said RF bias is applied to said electrostatic chuck to increase an energy of an inert gas near a surface of said substrate thereby imparting directionality to Ti+ atoms from said plasma for deposition of said Ti and TiN layers on said substrate.