Patent ID: 6919267

Claim:
A method for forming a wiring structure, the method comprising: a groove forming step of forming an anti-reflection film on an insulating film and then forming, in each of the anti-reflection film and the insulating film, a first groove and a second groove adjacent to the first groove; a film depositing step of depositing a barrier metal film and a conductive film on the anti-reflection film such that each of the first and second grooves is filled therewith; a first polishing step of removing the portion of the conductive film outside the first and second grooves by polishing; a second polishing step of removing, after the first polishing step, the portion of the barrier metal film outside the first and second grooves by polishing; a foreign matter removing step of removing respective foreign matters adhered to a polishing pad and to a surface to be polished after the second polishing step therefrom; and a third polishing step of polishing, after the foreign matter removing step, a surface of the anti-reflection film.