Patent ID: 7368389

Claim:
A method of forming an electrically conductive plug, comprising: providing an opening within electrically insulative material over a node location on a substrate; forming an electrically conductive material within the opening and elevationally over the insulative material; chemical mechanically polishing the conductive material with a first polishing pad force against the substrate effective to recess an outermost surface of the conductive material from an outermost surface of the insulative material after said conductive material-chemical mechanical polishing; after chemical mechanical polishing the conductive material, overfilling remaining volume of the opening over the polished conductive material with an electrically conductive metal material different from that of the conductive material; and chemical mechanical polishing the metal material with a second polishing force against the substrate which is less than that of the first polishing pad force effective to form an electrically conductive plug within the opening comprising the conductive material and the metal material.