Patent ID: 7427568
Filing Date: 2008-09-23
Classification: C23C,H01L

Abstract:
1. A method of forming an interconnect structure, comprising: positioning a substrate having high aspect ratio features in a deposition chamber; providing a first gas mixture to the deposition chamber, wherein the first gas mixture comprises one or more first process gases and one or more first etch species; depositing a barrier layer on the substrate, wherein the first etch species in the first gas mixture selectively removes portions of the barrier layer deposited adjacent to the high aspect ratio features; providing a second gas mixture to the deposition chamber, wherein the second gas mixture comprises one or more second process gases and one or more second etch species; and depositing a metal layer on the barrier layer, wherein the second etch species in the second gas mixture selectively removes portions of the metal layer deposited adjacent to the high aspect ratio features.