Patent ID: 6903011

Claim:
A method of forming conductive regions of a semiconductor device, the method comprising: providing a workpiece, the workpiece having an insulating layer disposed thereon, the insulating layer being patterned with a pattern for at least one conductive region and having a top surface; filling the patterned insulating layer with a conductive material; planarizing the workpiece to remove the conductive material from over the top surface of the insulating layer, leaving the conductive material recessed beneath the top surface of the insulating layer; depositing a displacement material over the recessed conductive material and exposed portions of the insulating layer; planarizing the workpiece to remove the displacement material from over the top surface of the insulating layer; and reacting the displacement material with a solution containing the conductive material to remove the displacement material from over the recessed conductive material and fill the conductive material recess at least partially with conductive material from the solution.