Patent ID: 6509273
Filing Date: 2003-01-21
Classification: H01L

Abstract:
A method for fabricating a semiconductor integrated circuit device, comprising the steps of:(a) forming an insulating film on a body, the insulating film having an opening; (b) forming a conductive barrier layer in the opening and overlying the insulating film; (c) forming a metal film on the conductive barrier layer inside the opening and overlying the insulating film, to fill the opening; (d) removing the metal film outside the opening by means of abrasive-grain-free chemical mechanical polishing; (e) after the step (d), removing any metal film locally remaining on the conductive barrier layer, and a part of the conductive barrier layer on the insulating film, by means of with-abrasive-grain chemical mechanical polishing; and (f) after the step (e), removing the conductive barrier layer remaining on the insulating film by means of selective chemical mechanical polishing that selectively polishes the conductive barrier layer relatively to the metal film in the opening.