Patent ID: 6858549
Filing Date: 2005-02-22
Classification: H01L,Y10S

Abstract:
1. A method for forming a wiring structure, the method comprising: a groove forming step comprises 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 deposition comprised 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; a first polishing step comprises of removing the portion of the conductive film outside the first and second grooves by polishing; a second polishing step comprises 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 removal step comprises of removing deposition foreign matter adhered to a surface to be polished after the second polishing step; and after the foreign removal step, a third polishing step comprised of polishing a surface of the anti-reflection film by using an abrasive agent of the same type as used in the first polishing step.