Patent ID: 6132564
Filing Date: 2000-10-17
Classification: C23C,H01L

Abstract:
A method of preparing an electrical device surface for formation of an interconnection therewith in the manufacture of an electrical device, the method comprising the steps of:providing a substrate having an electrical device surface thereon that has contamination on the device surface thereof in a processing chamber that is equipped for vapor deposition of the next metal layer to be deposited onto the device surface;forming a plasma of inert gas in the chamber and ionizing therewith, in the plasma, initially neutral particles of the next metal to be deposited onto the surface by collision of the initially neutral particles of the metal with charged particles of the plasma to produce positive ions of the metal;etching the device surface with the positive ions of the metal formed in the plasma by controlling the substrate-to-plasma potential and thereby accelerating the positive ions of the metal from the plasma toward and onto the device surface to clean from the device surface contaminants that might be present thereon; thenforming a film of the metal on the device surface in the chamber by ionized physical deposition by controlling the substrate-to-plasma potential and thereby by electrically attracting the positive ions of the metal from the plasma and onto the surface without removing the substrate from the chamber.