Patent ID: 6326309
Filing Date: 2001-12-04
Classification: B24B,H01L

Abstract:
A semiconductor device manufacturing method comprising the steps of:providing a semiconductor substrate comprising concave portions having a first width and a second width narrower than the first width;forming an insulating film on the semiconductor substrate, the insulating film filled in the concave portions, the insulating film including a first convex portion having a first width and a second convex portion having a second width narrower than the first width, the first convex portion having a higher projection surface than the second convex portion;polishing the first convex portions of the insulating film by using a first abrasive cloth which has first hardness for reducing a capacity of the first convex portion; andpolishing the insulating film by using a second abrasive cloth which has second hardness softer than the first hardness after the insulating film has been polished by using the first abrasive cloth.