摘要:
A method for manufacturing a semiconductor device with a slurry composition for forming a tungsten pattern. The method comprises: forming a trench in an insulating film formed on a substrate; depositing a tungsten film over the insulating film including the trench; first polishing a tungsten film with a first slurry for polishing metal to expose the insulating film, the polishing selectivity ratio of the first slurry onto tungsten/insulating film being range from 30 to 100; and second polishing the insulating film and the tungsten film with a second slurry, the polishing selectivity ratio of the second slurry onto insulating film/tungsten being range from 3 to 500. The method reduces a thickness difference of tungsten patterns, thereby improving a production yield of semiconductor devices.