Patent ID: 7884018
Filing Date: 2011-02-08
Classification: C23C,H01L

Abstract:
1. A method of forming a noble metal cap on a conductive material embedded in a dielectric material in an interconnect structure, comprising the sequential steps of: storing a vapor of a noble metal compound under an atmosphere comprising carbon monoxide; evacuating the carbon monoxide atmosphere to substitute the atmosphere with a carrier gas substantially free of carbon monoxide; contacting a conductive material having a bare upper surface partially embedded in a dielectric material with the vapor of the noble metal containing compound in the presence of the carrier gas substantially free of carbon monoxide, wherein the dielectric material is exposed to the vapor; wherein said contacting step is carried out at a temperature, pressure and for a length of time sufficient to produce a noble metal cap disposed directly on said upper surface of said conductive material without substantially extending into an upper surface of said dielectric material and/or leaving a noble metal residue there onto, wherein the upper surfaces of the dielectric material and the conductive material are co-planar.