Patent ID: 8039391
Filing Date: 2011-10-18
Classification: H01L

Abstract:
1. A method of forming a contact in a semiconductor device, comprising the steps: forming a contact hole in a dielectric layer on a substrate containing a conductive region, the contact hole exposing a portion of the conductive region; forming a contact layer in the contact hole and on the conductive region portion; forming a barrier metal layer on the contact layer; plasma treating the barrier metal layer with a nitrogen-hydrogen plasma such that penetrated nitrogen concentration in the contact layer is less than 30 at. %; and forming a silicide region at the conductive region portion by reacting the contact layer with the conductive region portion, wherein the contact layer is titanium and the barrier metal layer is titanium nitride, the barrier metal layer is deposited to a thickness of between 25 to about 60 Å, the plasma is an N