Patent ID: 7550388

Claim:
A method for forming conductive wiring in a semiconductor device, comprising: preparing an object including an insulating layer having trenches and a conductive layer provided on the insulating layer, the conductive layer having a portion positioned outside the trenches and a portion positioned inside the trenches; and removing the portions of the conductive layer positioned outside the trenches, said removing includes: polishing the object to remove a part of the portion of the conductive layer positioned outside the trenches using a preliminary polishing composition containing a deterioration inhibitor for inhibiting deterioration of polishing capability of the polishing composition, an abrasive, and water, wherein the deterioration inhibitor is at least one compound selected from a polysaccharide and polyvinyl alcohol; polishing the object to remove the remaining portion of the conductive layer positioned outside the trenches using a finish polishing composition that is different from the preliminary polishing composition.