Patent ID: 10748778

Abstract:
There is provided a polishing method capable of more reducing defects on a silicon wafer surface. A polishing method of a silicon wafer, which includes a polishing step and a surface treatment step conducted after the polishing step and in which the number of abrasives in a surface treatment composition used in the surface treatment step is 1.0×1010 particles/mL or more and 1.0×1013 particles/mL or less by calculating from (1 [mL]×specific gravity of the composition [g/mL]×concentration of the abrasives [wt %])/((4/3)π×(average secondary particle diameter×10−7 [cm]/2)3 [/particle]×specific gravity of the abrasives [g/cm3]), using concentration of the abrasives in the surface treatment composition and an average secondary particle diameter measured by dynamic light scattering method, provided that all of the abrasives in the surface treatment composition used in the surface treatment step are assumed to have the average secondary particle diameter.